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We encourage you to perform a real-time search of NLEBeta
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1

E-Print Network 3.0 - al nacer cuba Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Hays et al., 2002). Turtles Flipper Tagged outside of Cuba... , Nuevitas Cuba fmoncada@ cip.telemar.cu 82399 32 F. MONCADA ET ... Source: Exeter, University of - Centre for...

2

Cuba: Energy, Sustainability and Independence  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Cuba: Energy, Sustainability and Independence Cuba: Energy, Sustainability and Independence Speaker(s): Victor Bruno Henriquez Perez Date: May 10, 2001 - 12:00pm Location: b Seminar Host/Point of Contact: Kristina LaCommare Cubasolar (http://www.cubasolar.cu) is Cuba's NGO of over 400 scientists researching and implementing projects in energy efficiency and conservation as well as renewable energy. This year Cubasolar wil receive a Global 500 award from the United Nations Environmental Program for its work in raising energy consciousness in Cuba and other nations of the developing world. Since its founding in 1994, Cubasolar has installed solar panels on over 300 family doctor clinics in rural Cuba and is in the process of installing 1800 panels in rural elementary schools. Cubasolar is also involved in

3

Bermuda: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

Bermuda: Energy Resources Bermuda: Energy Resources Jump to: navigation, search Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"TERRAIN","zoom":5,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"390px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":32.33333,"lon":-64.75,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

4

The Cuba Library  

E-Print Network [OSTI]

Concepts and implementation of the Cuba library for multidimensional numerical integration are elucidated.

T. Hahn

2005-09-02T23:59:59.000Z

5

Cuba | OpenEI  

Open Energy Info (EERE)

Cuba Cuba Dataset Summary Description (Abstract): Raster GIS data, 50 m wind power density for Cuba. (Purpose): To provide information on the wind resource potential in Cuba. Source NREL Date Released September 02nd, 2004 (10 years ago) Date Updated October 30th, 2007 (7 years ago) Keywords Cuba GEF GIS maps NREL SWERA UNEP wind Data application/zip icon Download Maps (zip, 839.7 KiB) Quality Metrics Level of Review Some Review Comment Temporal and Spatial Coverage Frequency Time Period License License Open Data Commons Public Domain Dedication and Licence (PDDL) Comment Rate this dataset Usefulness of the metadata Average vote Your vote Usefulness of the dataset Average vote Your vote Ease of access Average vote Your vote Overall rating Average vote Your vote Comments Login or register to post comments

6

The Black Legend and United States' attitudes in Cuba, 1898-1902  

E-Print Network [OSTI]

. w!nism in America. The biases embodied i:! thc Bi a& k Legend, combined !'ith a gro!&ing sense oi national i tl and imper i al& sm, plavcd;& n&aj or ro! c in the written and verbal reports about Cuba and the Cu- bans. However, historical... at opinions in thc Uni 1. eil States. The United States almost from its inception as a sov- ereign nation had an interest in the island of Cuba. Long after the other Latin American countries had gained inde- pendence, Cuba remained in ?hat was termed...

Byrd, Judy Lynn

2012-06-07T23:59:59.000Z

7

Bermuda's Tale of Two Time Series: Hydrostation S and BATS* HELEN E. PHILLIPS  

E-Print Network [OSTI]

km southeast (SE) of Bermuda (31°40 N, 64°10 W) in water approximately 4500 m deep. BATS became one S is that project scientists wanted to be in deeper water and outside any possible "island effects." We that a multidecadal trend of deep warming has reversed, likely as a result of the increased production of Labrador Sea

Joyce, Terrence M.

8

Cuba: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

Cuba: Energy Resources Cuba: Energy Resources Jump to: navigation, search Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"TERRAIN","zoom":5,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"390px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":22,"lon":-79.5,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

9

Drinking water in Cuba and seawater desalination  

Science Journals Connector (OSTI)

The lack of drinking water has become a problem at world level because, in many places, supplies are very limited and, in other places, their reserves have been drained. At the present time there are estimated to be around two thousand million people that don't have drinking water for several reasons, such as drought, contamination and the presence of saline waters not suitable for human consumption. Because of the human need for water, they have always taken residence in areas where the supply was guaranteed, sometimes impeding the exploitation of other areas that can be economically very interesting. However, this resource is usually very close and in abundance in the form of seawater but its salinity makes it unusable for many basic requirements. Humanity has been forced, therefore, to take into consideration the possibilities of the economic treatment of seawater. Cuba has regions where the supplies of drinking water are scarce and others where the lack of this resource limits economic exploitation. The present work is approached with regard to the situation of hydro resources in Cuba, it includes: a description of the main hydrographic basins of the country; the contamination levels of the waters and the measures for mitigation; analysis of the supplies and demand for drinking water and its quality; regulatory aspects. The state of seawater desalination in Cuba is also included and the possibility of its realisation using nuclear energy and the advantages that this would bring is evaluated.

E. Meneses-Ruiz; L.M. Turtos-Carbonell; I. Oviedo-Rivero

2004-01-01T23:59:59.000Z

10

Cuba-IAEA Energy Planning | Open Energy Information  

Open Energy Info (EERE)

form form View source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit with form History Facebook icon Twitter icon » Cuba-IAEA Energy Planning Jump to: navigation, search Name Cuba-IAEA Cooperation Agency/Company /Organization International Atomic Energy Agency Sector Energy Topics Background analysis Website http://wwwtc.iaea.org/tcpride/ Program Start 2009 Country Cuba Caribbean References IAEA Project database[1] The International Atomic Energy Agency is cooperating with Cuba to assess the atmospheric pollution of energy facilities for supporting energy policy decisions. References ↑ "IAEA Project database" Retrieved from "http://en.openei.org/w/index.php?title=Cuba-IAEA_Energy_Planning&oldid=328580"

11

City of Cuba, Missouri (Utility Company) | Open Energy Information  

Open Energy Info (EERE)

Cuba, Missouri (Utility Company) Cuba, Missouri (Utility Company) Jump to: navigation, search Name City of Cuba Place Missouri Utility Id 4608 Utility Location Yes Ownership M NERC Location SERC NERC RFC Yes Activity Distribution Yes References EIA Form EIA-861 Final Data File for 2010 - File1_a[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Utility Rate Schedules Grid-background.png Commercial Service Commercial Industrial Service Industrial Large Commercial Service Commercial Residential Service Residential Average Rates Residential: $0.0903/kWh Commercial: $0.0907/kWh Industrial: $0.0667/kWh References ↑ "EIA Form EIA-861 Final Data File for 2010 - File1_a" Retrieved from "http://en.openei.org/w/index.php?title=City_of_Cuba,_Missouri_(Utility_Company)&oldid=409496

12

Meteorology: typical meteorological year data for selected stations in Cuba  

Open Energy Info (EERE)

Cuba Cuba from NREL Dataset Summary Description (Abstract): A data set of hourly values of solar radiation and meteorological elements for a 1-year period. (Purpose): Simulations (Supplemental Information): A TMY consists of months selected from individual years and concatenated to form a complete year. The intended use is for computer simulations of solar energy conversion systems and building systems. Because of the selection criteria, these TMYs are not appropriate for simulations of wind energy conversion systems.A TMY provides a standard for hourly data for solar radiation and other meteorological elements that permit performance comparisons of system types and configurations for one or more locations. A TMY is not necessarily a good indicator of conditions over the next year, or even

13

Local Food, Sustainability, and Cuba's National Food Program  

E-Print Network [OSTI]

my gratitude to the many people who made this thesis possible. I particularly want to thank Dr. J. Christopher Brown, my advisor, for his insights. He has inspired me with his perpetual enthusiasm and energy and his efforts in making the world a... energy and could be adapted quickly, at low cost, and with local materials. The system Cuba developed at this time is referred to as the ?Cuban Model? of agricultural development. The Cuban Model is based around ecological farming practices...

Fusco, Audrey Corinne

2008-01-01T23:59:59.000Z

14

Environmental Radioactivity Study in Surface Sediments of Guacanayabo Gulf (Cuba)  

SciTech Connect (OSTI)

Sediment samples have been collected in the Guacanayabo gulf located in the southeast Cuba, to determinate the radioactivity levels of {sup 210}Pb, {sup 234}Th, {sup 214}Pb, {sup 137}Cs, {sup 232}Th and {sup 40}K using Low-Background Gamma Spectrometry and to evaluate its impact in the habitat of important marine species for fishery industry. The obtained results show the lowest radioactivity levels determined in Cuban marine environments. The species capture declination in the last years is not originated by radioactive pollution of the zone.

Reyes, H.; Rizo, O. Diaz; Bernal, J. L.; D'Alessandro, K.; Padilla, F.; Corrales, Y.; Casanova, O. A.; Gelen, A.; Martinez, Y.; Aguilar, J.; Arado, J. O. [Instituto Superior de Tecnologias y Ciencias Aplicadas (InSTEC), Habana 10400, POB 6163 (Cuba); Lopez-Pino, N. [Instituto Superior de Tecnologias y Ciencias Aplicadas (InSTEC), Habana 10400, POB 6163 (Cuba); Instituto de Fisica da USP, LAL, Rua do Matao, Travessa R., 187, 05508-900, SP (Brazil); Maidana, N. L. [Instituto de Fisica da USP, LAL, Rua do Matao, Travessa R., 187, 05508-900, SP (Brazil)

2009-06-03T23:59:59.000Z

15

E-Print Network 3.0 - algeria cuba indonesia Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Cuba Egypt Ethiopia Federal Republic of Yugoslavia India Indonesia Iran Israel Jordan... Hazardous, Excluded Countries (NonApproved)** Albania Algeria Armenia Azerbaijan...

16

E-Print Network 3.0 - ancianos cuba 2003-2005 Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

la Source: Ecole Polytechnique, Centre de mathmatiques Collection: Mathematics 11 Tourism and Agriculture March 22, 2010 Summary: Tourism and Agriculture in Cuba March 22,...

17

City of Cuba City, Wisconsin (Utility Company) | Open Energy Information  

Open Energy Info (EERE)

City of Cuba City City of Cuba City Place Wisconsin Utility Id 4607 Utility Location Yes Ownership M NERC Location MRO NERC MRO Yes ISO MISO Yes Activity Distribution Yes References EIA Form EIA-861 Final Data File for 2010 - File1_a[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Utility Rate Schedules Grid-background.png Cp-1 Small Power Service Commercial Cp-1 Small Power Service with Parallel Generation(20 kW or less)- Net Energy Billing Commercial Cp-1 TOD Small Power Optional Time-of-Day Service with Parallel Generation(20kW or less)-Net Energy Billing Commercial Cp-1 TOD Small Power Optional Time-of-Day Service Commercial Cp-2 Large Power Time-of-Day Service between 200kW and 1,000kW Demand

18

Technical Report - Cuba Wind Energy Resource Assessment | OpenEI  

Open Energy Info (EERE)

Cuba Wind Energy Resource Assessment Cuba Wind Energy Resource Assessment Dataset Summary Description (Abstract): This document describes the development of detailed high-resolution (1 km2) wind energy resource maps for Cuba. (Purpose): To provide information on the wind resource potential within Cuba. Source NREL Date Released August 21st, 2006 (8 years ago) Date Updated August 21st, 2006 (8 years ago) Keywords Cuba documentation GIS NREL SWERA UNEP wind Data application/pdf icon Download Report (pdf, 54.3 KiB) Quality Metrics Level of Review Some Review Comment Temporal and Spatial Coverage Frequency Time Period 2006 License License Other or unspecified, see optional comment below Comment Restrictions to use (Use Constraints): This GIS data was developed by the National Renewable Energy Laboratory ("NREL"), which is operated by the Midwest Research Institute for the U.S. Department of Energy ("DOE"). The user is granted the right, without any fee or cost, to use, copy, modify, alter, enhance and distribute this data for any purpose whatsoever, provided that this entire notice appears in all copies of the data. Further, the user of this data agrees to credit NREL in any publications or software that incorporate or use the data. Access to and use of the GIS data shall further impose the following obligations on the User. The names DOE/NREL may not be used in any advertising or publicity to endorse or promote any product or commercial entity using or incorporating the GIS data unless specific written authorization is obtained from DOE/NREL. The User also understands that DOE/NREL shall not be obligated to provide updates, support, consulting, training or assistance of any kind whatsoever with regard to the use of the GIS data. THE GIS DATA IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL DOE/NREL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER, INCLUDING BUT NOT LIMITED TO CLAIMS ASSOCIATED WITH THE LOSS OF DATA OR PROFITS, WHICH MAY RESULT FROM AN ACTION IN CONTRACT, NEGLIGENCE OR OTHER TORTIOUS CLAIM THAT ARISES OUT OF OR IN CONNECTION WITH THE ACCESS OR USE OF THE GIS DATA. The User acknowledges that access to the GIS data is subject to U.S. Export laws and regulations and any use or transfer of the GIS data must be authorized under those regulations. The User shall not use, distribute, transfer, or transmit GIS data or any products incorporating the GIS data except in compliance with U.S. export regulations. If requested by DOE/NREL, the User agrees to sign written assurances and other export-related documentation as may be required to comply with U.S. export regulations.

19

Microsoft Word - cuba-document_de-dh.doc  

Open Energy Info (EERE)

Resource Mapping Activity Resource Mapping Activity Introduction This document describes the development of detailed high-resolution (1 km 2 ) wind energy resource maps for the country of Cuba. These maps were created at the United States Department of Energy's National Renewable Energy Laboratory (NREL) as part of the Solar and Wind Energy Resource Assessment (SWERA) project for the United Nations Environment Programme. The wind mapping activity covered approximately 110,000 km 2 of land area and, including offshore areas, more than 150,000 km 2 . The maps can be found in a separate part of the SWERA archive. NREL's Wind Resource Assessment and Mapping System (WRAMS) is a combination of analytical, numerical, and empirical methods using Geographic Information System (GIS) mapping tools and data

20

Effects of soil treatments supplemented with two rates of magnesium sulfate on the availability of soil nutrients and on the yield and chemical composition of coastal Bermuda grass  

E-Print Network [OSTI]

Wean PPM of P in Soil Samples Collected in 1949 from Coast, al Bermuda Grass Plots Receiving Qifferent Rates and Combinations of N, F205, and MgS04. 7H20 g Treatments P N0 P0 1 Mean P0 1 Pl Mean N2 p$ Mean M80 1. 3 (8) jZ' 3. 4 2. 3 (16...) Nagnesium (Y&g) N xP N xNg PxNg Nxpxlig Replications 95 1 1 1 1 2 2 1 2 4& 857. 64. ="-" 9, 702. 2 5'-'? 13. 02 10. 67 14 & 113. 50?' " 319. 44 1, 435. 03 3. 38 964. 72 103. 68 8 00 17. 78 . 02 , 02 25, 87 . 58 2. 63 . 01 1. 77...

Evatt, Nathan S

2012-06-07T23:59:59.000Z

Note: This page contains sample records for the topic "bermuda cu cuba" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

The Object of the Atlantic: Concrete Aesthetics in Cuba, Brazil, and Spain, 1868-1968  

E-Print Network [OSTI]

Concrete Aesthetics in Cuba, Brazil, and Spain, 18681968,in the Back- lands of Brazil. Pittsburgh: University ofCosta, Emlia Viotti da. Brazil: The Age of Reform, 1870

Price, Rachel L.

2014-01-01T23:59:59.000Z

22

E-Print Network 3.0 - avellaneda entre cuba Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

y 1864, volviendo a Espaa previa una estancia... Anales, 23, 2011, pp. 323-351 El primer desplazamiento de Avellaneda es el que la traslada de Cuba... con el viaje que les...

23

CU | Open Energy Information  

Open Energy Info (EERE)

CU CU Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home NEPA Casual Use Determination of NEPA Adequacy Categorical Exclusion Environmental Assessment Environmental Impact Statements Print PDF NEPA-Related Analysis: Casual Use (CU) General Document Collections (26) Documents Regulatory Roadmap Type of NEPA environmental analysis placeholder. This query has been included to allow you to use the black arrows in the table header cells to sort the table data. Document # Serial Number Applicant Lead Agency District Office Field Office Development Phase(s) Techniques NVN-084629 CU, CU Vulcan Energy BLM Nevada State Office BLM Winnemucca District Office BLM Humboldt River Field Office BLM BLM NVN-084630 CU Vulcan Energy BLM Nevada State Office BLM Winnemucca District Office BLM Humboldt River Field Office BLM

24

Mass of Cu-57  

E-Print Network [OSTI]

the extension of these systematics to higher Z. If the 3 =57 nuclei have true single particle low-lying states, the Cu beta decay rates determine the 2p3/2 +2p3/2 and 2p 3/2 ~2p ~ &2 Gamow-Teller matrix elements, providing a measure of Gamow... with A ~ 56 (Ref. 3) and possibly for the time evolu- tion of cosmic x-ray bursts. Cu has been observed in the Cu~ Ni+e++v, and Ni( Li, He} Cu reactions. The former study found the Cu mass excess to be ?47.34(13) MeV and deter- mined its beta decay...

Gagliardi, Carl A.; Semon, D. R.; Tribble, Robert E.; Vanausdeln, L. A.

1986-01-01T23:59:59.000Z

25

Production of High Resolution Irradiance Data for Central America and Cuba  

Open Energy Info (EERE)

Production of High Resolution Irradiance Data for Central America and Cuba Production of High Resolution Irradiance Data for Central America and Cuba Dataset Summary Description (Abstract): The main object of the SUNY task for SWERA is to prepare high resolution global irradiance (GHI) and direct irradiance (DNI) data sets for the countries of Cuba, El Salvador, Guatemala, Honduras and Nicaragua.Much of our initial effort focused on building up the satellite data tx_metadatatool, and in strengthening and validating the models capable of converting that data into ground surface irradiances. Three research articles, acknowledging all or partial funding from UNEP & SWERA have been published on this subject. (Purpose): SWERA documentation Source SUNY Albany Date Released July 31st, 2003 (11 years ago) Date Updated August 29th, 2003 (11 years ago)

26

Million Cu. Feet  

Gasoline and Diesel Fuel Update (EIA)

0 0 Alaska - Natural Gas 2010 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table 29. Summary Statistics for Natural Gas - Alaska, 2006-2010 Number of Producing Gas Wells at End of Year................................................... 231 239 261 261 269 Production (million cubic feet) Gross Withdrawals From Gas Wells .............................................. 193,654 165,624 150,483 137,639 127,417 From Oil Wells ................................................ 3,012,097 3,313,666 3,265,401

27

Cuba-Joint Programme on Resource Efficient and Cleaner Production (RECP) in  

Open Energy Info (EERE)

form form View source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit with form History Facebook icon Twitter icon » Cuba-Joint Programme on Resource Efficient and Cleaner Production (RECP) in Developing and Transition Countries Jump to: navigation, search Name Cuba-Joint Programme on Resource Efficient and Cleaner Production (RECP) in Developing and Transition Countries Agency/Company /Organization United Nations Industrial Development Organization (UNIDO), United Nations Environment Programme (UNEP) Partner Ministry of Energy, Ministry of Planning, Ministry of Finance, Ministry of Environment, Ministry of Industry Sector Climate, Energy, Water Focus Area Renewable Energy, Non-renewable Energy, Agriculture, Economic Development, Goods and Materials, Industry, People and Policy, Water Conservation

28

Integrated: Geospatial Toolkit GIS data for Cuba from NREL | OpenEI  

Open Energy Info (EERE)

Cuba from NREL Cuba from NREL Dataset Summary Description (Abstract): Geographic Information Systems (GIS) data intended for use in the Geospatial toolkit or with any GIS software. (Purpose): The Solar and Wind Energy Resource Assessment (SWERA) Geospatial Toolkit (GsT) is a map-based software application that can be used for decision making and policy analysis in addition to planning for future energy projects. The SWERA application utilizes Geographical Information Systems (GIS) to develop common scenarios to evaluate potential locations for solar or wind energy plants. (Supplemental Information): The zip file contains the available geospatial toolkit data and metadata. Each country's data package depends on the data provided by the SWERA partners. ---------------------------------------------------------

29

Production of high Resoulution Irradiance Data for Central America and Cuba  

Open Energy Info (EERE)

DRAFT REPORT - JULY 2003 DRAFT REPORT - JULY 2003 Production of high Resolution Irradiance Data For Central America and Cuba Prepared by Richard Perez ASRC, the University at Albany (SUNY) For United Nations Environmental Program Solar Energy and Wind Resource Assessment (SWERA) Deliverable for July, 2003 The main objective of the SUNY task for SWERA is to prepare high resolution global irradiance (GHI) and direct irradiance (DNI) data sets for the countries of Cuba, El Salvador, Guatemala, Honduras and Nicaragua. Much of our initial effort focused on building up the satellite data archive, and in strengthening and validating the models capable of converting that data into ground surface irradiances. Three research articles, acknowledging all or partial funding

30

Epitaxial Graphene on Cu(111)  

Science Journals Connector (OSTI)

Epitaxial Graphene on Cu(111) ... The growth of graphene on single crystal Cu(111) has been achieved by thermal decomposition of ethylene in an ultrahigh vacuum chamber for the first time. ... The structural and electronic properties of graphene on Cu(111) have been investigated by scanning tunneling microscopy and spectroscopy. ...

Li Gao; Jeffrey R. Guest; Nathan P. Guisinger

2010-08-02T23:59:59.000Z

31

Determinacion de la Irradiancion Solar Sobre el Territorio de Cuba a Partir  

Open Energy Info (EERE)

Determinacion de la Irradiancion Solar Sobre el Territorio de Cuba a Partir Determinacion de la Irradiancion Solar Sobre el Territorio de Cuba a Partir de Imágenes de Satelites Dataset Summary Description (Abstract): 31Conclusiones y recomendacionesEl método de cálculo de la radiación solar global desarrollado ha obtenido resultadoscomparables a otros métodos revisados en la bibliografía. A diferencia de muchos deestos métodos, que han sido ajustados y refinados por sus autores a lo largo de variosaños de trabajo, este es completamente nuevo y parte de un enfoque diferente, por loque tiene un gran potencial de ajuste y sintonización.Algunos cambios que pueden sugerirse son tomar distribuciones espaciales ytemporales del albedo, del índice de aerosoles y el contenido total de ozono y no valoresmedios constantes , lo que mejoraría el desempeño del modelo

32

Agro-industry sugarcane residues disposal: The trends of their conversion into energy carriers in Cuba  

Science Journals Connector (OSTI)

The goal of the present work was to carry out a review of the disposal practices for the agro-industrys sugarcane residue and the trends of energy use in Cuba. The lack of an alternative energy carrier to electricity with storage capability for use in off-season has to date been an unsolvable question. The improvement of cogeneration capacity via implementation of CEST or BIG/GTCC and the barriers for their implementation, the introduction of a medium size (3ton/h) fast pyrolysis module (FPM3) as a solution for off-season energy demand in the agro-industry, and an assessment of the energy required to do so, were also analyzed. Bio-oil production from bagasse and sugarcane agriculture residues (SCAR) and their particularities at the sugar mill are treated. The influence of sugar facility production process configuration is analyzed. The fast pyrolysis products and the trends of their end uses in Cuba are presented. The production cost of a ton of Bio-oil for FPM3 conditions was calculated at 155USD/ton and the payback time as a function of selling price between 160 and 110USD/ton was estimated to be from 1.5 to 4 years. The economic feasibility of the FPM3 was estimated, comparing the added values for three scenarios: 1st case, currently-used sugar production, 16.5USD/ton of cane; 2nd case, factoring in the cogeneration improvement, 27USD/ton of cane; and 3rd case, with cogeneration improvement and Bio-oil production, 40USD/ton of cane. The energy use of SCAR and the introduction of FPM3 in the sugar mill are promising improvements that could result in a potential surplus of 80kWhe/ton of cane in-season, or 6נ106ton of Bio-oil (LHV=15MJ/kg) for use off-season in a milling season of 4 million tons of raw sugar.

W. Alonso Pippo; P. Garzone; G. Cornacchia

2007-01-01T23:59:59.000Z

33

Epitaxial graphene on Cu(111).  

SciTech Connect (OSTI)

The growth of graphene on single crystal Cu(111) has been achieved by thermal decomposition of ethylene in an ultrahigh vacuum chamber for the first time. The structural and electronic properties of graphene on Cu(111) have been investigated by scanning tunneling microscopy and spectroscopy. The nucleation of monolayer islands and two predominant domain orientations have been observed, which lead to the formation of numerous domain boundaries with increasing coverage. These results reveal that reducing the density of domain boundaries is one challenge of growing high-quality graphene on copper.

Gao, L.; Guest, J. R.; Guisinger, N. P. (Center for Nanoscale Materials)

2010-09-01T23:59:59.000Z

34

The optimization of the production of ??Cu  

E-Print Network [OSTI]

. N. Kundu and M. L. Pool in 1950 and 1951. Based on these two investigations, C. M. Lederer, J. M. Hollander and I. Perlman have stated that the principal means of production of this isotope are through the Ni(a, p)s Cu, Zn(n, p) Cu and the Cu... the existence of the contaminating reaction ''Ni(a, p) 'Cu. This reaction becomes important in elemental or low enrichment sam- (~) ples. From Table 3 it was noted that another contam- inant isotope was ''Cu which has a half-life of S. l m and decays to 6...

Gauny, Ronnie Dean

2012-06-07T23:59:59.000Z

35

Phase transformations in Cu-Zr multilayers  

SciTech Connect (OSTI)

A study of phase transformations is reported for Cu-rich, Cu-Zr multilayer foils synthesized using magnetron sputter deposition and annealed using a differential scanning calorimeter. The foils range in composition from 1.6 to 9.0 at% Zr and consist of alternate layers of polycrystalline Cu and Zr. Differential scanning calorimetry, X-ray analysis and electron microscopy were used to three distinct reactions in the foils: a mixing and an amorphization of the Cu and die Zr, a crystallization on of this amorphous phase to the metastable intermetallic Cu{sub 5l}Zr{sub l4}, and a transformation of the Cu{sub 5l}Zr{sub l4} phase into the equilibrium phase Cu{sub 9}Zr{sub 2}. The as-deposited layering remained stable during the first two reactions and then broke down in the third reaction as large grains of Cu{sub 9}Zr{sub 2} encompassed the smaller Cu grains. Heats of the reactions and activation energies of these reactions are measured and are compared to values reported for bulk samples. The measured heats provide evidence that amorphous Cu-Zr alloys phase separate and that mixing and short range ordering produce 3.5 times more heat than long range ordering produces when Ca and Zr react and form Cu{sub 5l}Zr{sub l4}.

Weihs, T.P.; Barbee, T.W. Jr.; Wall, M.A.

1993-04-01T23:59:59.000Z

36

cu | OpenEI Community  

Open Energy Info (EERE)

02 02 Varnish cache server Home Groups Community Central Green Button Applications Developer Utility Rate FRED: FRee Energy Database More Public Groups Private Groups Features Groups Blog posts Content Stream Documents Discussions Polls Q & A Events Notices My stuff Energy blogs 429 Throttled (bot load) Error 429 Throttled (bot load) Throttled (bot load) Guru Meditation: XID: 2142229502 Varnish cache server cu Home Dc's picture Submitted by Dc(15) Member 15 November, 2013 - 13:26 Living Walls ancient building system architect biomimicry building technology cooling cu daylight design problem energy use engineer fred andreas geothermal green building heat transfer heating living walls metabolic adjustment net zero pre-electricity Renewable Energy Solar university of colorado utility grid Wind Much of the discussion surrounding green buildings centers around reducing

37

IJ.fI.CU  

Broader source: Energy.gov (indexed) [DOE]

IJ.fI.CU IJ.fI.CU . u.s. DEPARTUEN T OF ENERGY EERE PROJECT MANAG EM EN T CENTER NEPA DETE:Rl.VIINATION R[ClPIENT:Fl~County-Seminole Page I of2 STATE: FL PROJECf TITLE: Seminole County , Fl EECBG Program: County Facility and Utility Operation Improvements; Energy Efficiency and Conservation Strategy Development; Ugrade Land Development Code: Grant Administration; Energy Efficiency and Conservation Strategy Enhancement Funding Opportunity Announcement Number Procurement Instrument Number NEPA Control Number CID Number DE-FOA-0000013 DE-EE0000798.Q01 a Based on my nview of the information concerning the proposed action, as NEPA Compliance Officer (authorized under DOE Order 451.IA), I have made the following determination: ex, EA, EIS APPENDIX AND NUMBER:

38

Surface geometry of Cu{531}  

Science Journals Connector (OSTI)

We present a combined quantitative low-energy electron diffraction (LEED) and density-functional theory (DFT) study of the chiral Cu{531} surface. The surface shows large inward relaxations with respect to the bulk interlayer distance of the first two layers and a large expansion of the distance between the fourth and fifth layers. (The latter is the first layer having the same coordination as the Cu atoms in the bulk.) Additional calculations have been performed to study the likelihood of faceting by comparing surface energies of possible facet terminations. No overall significant reduction in energy with respect to planar {531} could be found for any of the tested combinations of facets, which is in agreement with the experimental findings.

G. Jones; M. J. Gladys; J. Ottal; S. J. Jenkins; G. Held

2009-04-14T23:59:59.000Z

39

Room-temperature Formation of Hollow Cu2O Nanoparticles  

SciTech Connect (OSTI)

Monodisperse Cu and Cu2O nanoparticles (NPs) are synthesized using tetradecylphosphonic acid as a capping agent. Dispersing the NPs in chloroform and hexane at room temperature results in the formation of hollow Cu2O NPs and Cu@Cu2O core/shell NPs, respectively. The monodisperse Cu2O NPs are used to fabricate hybrid solar cells with efficiency of 0.14percent under AM 1.5 and 1 Sun illumination.

Hung, Ling-I; Tsung, Chia-Kuang; Huang, Wenyu; Yang, Peidong

2010-01-18T23:59:59.000Z

40

Investigation of Sulfur Deactivation on Cu/Zeolite SCR Catalysts...  

Broader source: Energy.gov (indexed) [DOE]

of Sulfur Deactivation on CuZeolite SCR Catalysts in Diesel Application Investigation of Sulfur Deactivation on CuZeolite SCR Catalysts in Diesel Application Investigation of...

Note: This page contains sample records for the topic "bermuda cu cuba" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Understanding the Deactivation Mechanisms of Cu/Zeolite SCR Catalysts...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Deactivation Mechanisms of CuZeolite SCR Catalysts in Diesel Application Understanding the Deactivation Mechanisms of CuZeolite SCR Catalysts in Diesel Application To understand...

42

Cu  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

t in t im e wit h b e a m (t a n k h it s > 2 0 0 , ve t o h it s < 6 ) 1 0 va r ia b le Fis h e r d is cr im in a n t in clu d e s : Fr a c t io n o f ligh t o n vs o ff r in g Fr...

43

OBSERVATIONS ON COASTAL EROSION IN BERMUDA AND ...  

Science Journals Connector (OSTI)

morphology of the undercut region, and the restricted wave energy, wave cutting is .... Zero tide level coincides with geodetic base level determined from local...

44

Biogeography and the caves of Bermuda  

Science Journals Connector (OSTI)

... but significant increases with depth (Fig. 1), perhaps an extension of the natural geothermal gradient observed in the underlying basalts1.

Thomas M. Iliffe; C. W. Hart; Raymond B. Manning

1983-03-10T23:59:59.000Z

45

Accelerating Fatigue Testing for Cu Ribbon Interconnects (Presentation)  

SciTech Connect (OSTI)

This presentation describes fatigue experiments and discusses dynamic mechanical loading for Cu ribbon interconnects.

Bosco, N.; Silverman, T.; Wohlgemuth , J.; Kurtz, S.; Inoue, M.; Sakurai, K.; Shioda, T.; Zenkoh, H.; Miyashita, M.; Tadanori, T.; Suzuki, S.

2013-05-01T23:59:59.000Z

46

Microstructures of Si surface layers implanted with Cu  

SciTech Connect (OSTI)

Microstructures of Si ion-implanted with Cu have been characterized by TEM after annealing. For 1.2 at.%, the Cu is trapped at planar defects, but for 10 at.%, {eta}-Cu{sub 3}Si forms and Cu diffuses at its equilibrium solubility. These observations allow proper evaluation of the binding energies of Cu to previously formed internal cavities (2.2 eV) and {eta}-Cu{sub 3}Si (1.7 eV). The 10 at.% Cu layer promotes oxidation of Si catalyzed by {eta}-Cu{sub 3}Si. The microstructures also indicate that Si implanted with {approximately}2 at.% Cu reforms epitaxially with embedded defects after 8 hr at 700C, but for {approximately}10 at.% Cu, epitaxy is not recovered after 6 hours at 600C.

Follstaedt, D.M.; Myers, S.M.

1993-12-31T23:59:59.000Z

47

Ferromagnetism in CuO-ZnO multilayers  

SciTech Connect (OSTI)

We investigated the magnetic properties of CuO-ZnO heterostructures to elucidate the origin of the ferromagnetic signature in Cu doped ZnO. The CuO and ZnO layer thickness were varied from 15 to 150 nm and from 70 to 350 nm, respectively. Rutherford backscattering experiments showed no significant diffusion of either Cu in ZnO or Zn in CuO layers. Magnetic measurements indicate ferromagnetism at 300 K, which depends on the CuO particle size, but not on the CuO-ZnO interfacial area. Polarized neutron reflectometry measurements show that the observed magnetization cannot be accounted for solely by spins localized near the CuO-ZnO interface or in the CuO layer.

Sudakar, C.; Padmanabhan, K.; Naik, R.; Lawes, G. [Department of Physics and Astronomy, Wayne State University, Detroit, Michigan 48201 (United States); Kirby, B. J. [NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (United States); Kumar, Sanjiv [NCCCM, Bhabha Atomic Research Centre, ECIL Post, Hyderabad 500062 (India); Naik, V. M. [Department of Natural Sciences, University of Michigan-Dearborn, Dearborn, Michigan 48128 (United States)

2008-07-28T23:59:59.000Z

48

Comparative study of the alloying effect on the initial oxidation of Cu-Au(100) and Cu-Pt(100)  

SciTech Connect (OSTI)

Using in situ transmission electron microscopy, we show that the oxidation of the Cu-Au(100) results in the formation of Cu{sub 2}O islands that deeply embed into the Cu-Au substrate while the oxidation of the Cu-Pt(100) leads to the formation of Cu{sub 2}O islands that highly protrude above the Cu-Pt substrate. Their difference is attributed to the different mobilities of Pt and Au in the Cu base alloys for which the sluggish mobility of Pt in Cu results in trapped Pt atoms at the oxide/alloy interface while the faster mobility of Au in Cu leads to enhanced rehomogenization of the alloy composition.

Luo, Langli; Zhou, Guangwen, E-mail: gzhou@binghamton.edu [Department of Mechanical Engineering and Multidisciplinary Program in Materials Science and Engineering, State University of New York, Binghamton, New York 13902 (United States); Kang, Yihong [Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania 15261 (United States); Yang, Judith C. [Department of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261 (United States); Su, Dong; Stach, Eric A. [Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973 (United States)

2014-03-24T23:59:59.000Z

49

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

6 6 Tennessee - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S44. Summary statistics for natural gas - Tennessee, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 285 310 230 210 212 Production (million cubic feet) Gross Withdrawals From Gas Wells 4,700 5,478 5,144 4,851 5,825 From Oil Wells 0 0 0 0 0 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0

50

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

38 38 Nevada - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S30. Summary statistics for natural gas - Nevada, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells 0 0 0 0 0 From Oil Wells 4 4 4 3 4 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0 0 0 0 0 Total 4 4 4 3 4

51

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

2 2 Connecticut - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S7. Summary statistics for natural gas - Connecticut, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells 0 0 0 0 0 From Oil Wells 0 0 0 0 0 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0

52

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

4 4 Oregon - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S39. Summary statistics for natural gas - Oregon, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 18 21 24 26 24 Production (million cubic feet) Gross Withdrawals From Gas Wells 409 778 821 1,407 1,344 From Oil Wells 0 0 0 0 0 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0 0 0 0 0

53

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

4 4 Idaho - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S14. Summary statistics for natural gas - Idaho, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells 0 0 0 0 0 From Oil Wells 0 0 0 0 0 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0 0 0 0 0 Total 0

54

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

4 4 Washington - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S49. Summary statistics for natural gas - Washington, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells 0 0 0 0 0 From Oil Wells 0 0 0 0 0 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0 0 0 0 0 Total 0

55

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

0 0 Maine - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S21. Summary statistics for natural gas - Maine, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells 0 0 0 0 0 From Oil Wells 0 0 0 0 0 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0 0 0 0 0 Total 0 0

56

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

8 8 Minnesota - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S25. Summary statistics for natural gas - Minnesota, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells 0 0 0 0 0 From Oil Wells 0 0 0 0 0 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0 0 0 0 0 Total 0 0 0

57

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

2 2 South Carolina - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S42. Summary statistics for natural gas - South Carolina, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells 0 0 0 0 0 From Oil Wells 0 0 0 0 0 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0 0 0 0 0 Total 0

58

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

6 6 District of Columbia - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S9. Summary statistics for natural gas - District of Columbia, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells 0 0 0 0 0 From Oil Wells 0 0 0 0 0 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0

59

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

6 6 North Carolina - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S35. Summary statistics for natural gas - North Carolina, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells 0 0 0 0 0 From Oil Wells 0 0 0 0 0 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0 0 0 0 0 Total 0

60

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

0 0 Iowa - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S17. Summary statistics for natural gas - Iowa, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells 0 0 0 0 0 From Oil Wells 0 0 0 0 0 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0 0 0 0 0 Total 0 0

Note: This page contains sample records for the topic "bermuda cu cuba" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

4 4 Massachusetts - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S23. Summary statistics for natural gas - Massachusetts, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells 0 0 0 0 0 From Oil Wells 0 0 0 0 0 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0 0 0 0 0 Total 0

62

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

6 6 Oregon - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S39. Summary statistics for natural gas - Oregon, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 21 24 26 24 27 Production (million cubic feet) Gross Withdrawals From Gas Wells 778 821 1,407 1,344 770 From Oil Wells 0 0 0 0 0 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0 0 0 0 0

63

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

8 8 Georgia - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S11. Summary statistics for natural gas - Georgia, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells 0 0 0 0 0 From Oil Wells 0 0 0 0 0 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0 0 0 0 0

64

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

6 6 Minnesota - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S25. Summary statistics for natural gas - Minnesota, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells 0 0 0 0 0 From Oil Wells 0 0 0 0 0 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0 0 0 0 0 Total 0 0 0

65

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

2 2 Delaware - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S8. Summary statistics for natural gas - Delaware, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells 0 0 0 0 0 From Oil Wells 0 0 0 0 0 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0 0 0 0 0

66

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

4 4 District of Columbia - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S9. Summary statistics for natural gas - District of Columbia, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells 0 0 0 0 0 From Oil Wells 0 0 0 0 0 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0

67

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

0 0 New Jersey - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S32. Summary statistics for natural gas - New Jersey, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells 0 0 0 0 0 From Oil Wells 0 0 0 0 0 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0 0 0 0 0 Total 0

68

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

4 4 Tennessee - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S44. Summary statistics for natural gas - Tennessee, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 305 285 310 230 210 Production (million cubic feet) Gross Withdrawals From Gas Wells NA 4,700 5,478 5,144 4,851 From Oil Wells 3,942 0 0 0 0 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0

69

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

4 4 Nebraska - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S29. Summary statistics for natural gas - Nebraska, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 186 322 285 276 322 Production (million cubic feet) Gross Withdrawals From Gas Wells 1,331 2,862 2,734 2,092 1,854 From Oil Wells 228 221 182 163 126 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0

70

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

0 0 Vermont - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S47. Summary statistics for natural gas - Vermont, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells 0 0 0 0 0 From Oil Wells 0 0 0 0 0 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0 0 0 0 0 Total 0 0 0

71

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

8 8 Wisconsin - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S51. Summary statistics for natural gas - Wisconsin, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells 0 0 0 0 0 From Oil Wells 0 0 0 0 0 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0 0 0 0 0 Total 0 0 0

72

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

8 8 North Carolina - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S35. Summary statistics for natural gas - North Carolina, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells 0 0 0 0 0 From Oil Wells 0 0 0 0 0 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0 0 0 0 0 Total 0

73

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

2 2 New Jersey - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S32. Summary statistics for natural gas - New Jersey, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells 0 0 0 0 0 From Oil Wells 0 0 0 0 0 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0 0 0 0 0 Total 0

74

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

0 0 Georgia - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S11. Summary statistics for natural gas - Georgia, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells 0 0 0 0 0 From Oil Wells 0 0 0 0 0 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0 0 0 0 0

75

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

0 0 Connecticut - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S7. Summary statistics for natural gas - Connecticut, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells 0 0 0 0 0 From Oil Wells 0 0 0 0 0 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0

76

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

0 0 Maryland - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S22. Summary statistics for natural gas - Maryland, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 7 7 7 7 8 Production (million cubic feet) Gross Withdrawals From Gas Wells 35 28 43 43 34 From Oil Wells 0 0 0 0 0 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0 0 0 0 0 Total 35

77

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

6 6 Florida - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S10. Summary statistics for natural gas - Florida, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells 0 0 0 0 0 From Oil Wells 2,000 2,742 290 13,938 17,129 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0

78

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

0 0 New Hampshire - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S31. Summary statistics for natural gas - New Hampshire, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells 0 0 0 0 0 From Oil Wells 0 0 0 0 0 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0 0 0 0 0 Total 0

79

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

2 2 Maryland - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S22. Summary statistics for natural gas - Maryland, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 7 7 7 8 9 Production (million cubic feet) Gross Withdrawals From Gas Wells 28 43 43 34 44 From Oil Wells 0 0 0 0 0 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0 0 0 0 0 Total 28

80

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

2 2 Missouri - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S27. Summary statistics for natural gas - Missouri, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 0 0 0 53 100 Production (million cubic feet) Gross Withdrawals From Gas Wells 0 0 0 0 0 From Oil Wells 0 0 0 0 0 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0 0 0 0 0 Total 0

Note: This page contains sample records for the topic "bermuda cu cuba" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

4 4 Delaware - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S8. Summary statistics for natural gas - Delaware, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells 0 0 0 0 0 From Oil Wells 0 0 0 0 0 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0 0 0 0 0

82

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

2 2 Massachusetts - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S23. Summary statistics for natural gas - Massachusetts, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells 0 0 0 0 0 From Oil Wells 0 0 0 0 0 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0 0 0 0 0 Total 0

83

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

0 0 South Carolina - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S42. Summary statistics for natural gas - South Carolina, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells 0 0 0 0 0 From Oil Wells 0 0 0 0 0 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0 0 0 0 0 Total 0

84

Anisotropic electric surface resistance of Cu(110)  

Science Journals Connector (OSTI)

The electric surface resistance is measured without contacts by grazing incidence of p-polarized infrared (IR) radiation for the adsorbates CO and C2H4, which settle on top of the close packed atomic ridges of Cu(110) in the 1, -1, 0 direction. Surface resistance has only been observed for the IR electric currents in this direction. This can be explained by the assumption that IR induced currents in the 001 direction can only flow in the second and deeper layers of Cu(110). Therefore, in this direction, there is no friction with the adsorbates and hence no surface resistance.

A Otto; P Lilie; P Dumas; C Hirschmugl; M Pilling; G P Williams

2007-01-01T23:59:59.000Z

85

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

0 0 Rhode Island - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S41. Summary statistics for natural gas - Rhode Island, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 0 0 0 0 0 Production (million cubic feet) Gross Withdrawals From Gas Wells 0 0 0 0 0 From Oil Wells 0 0 0 0 0 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0 0 0 0 0 Total 0

86

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

0 0 Indiana - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S16. Summary statistics for natural gas - Indiana, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 525 563 620 914 819 Production (million cubic feet) Gross Withdrawals From Gas Wells 4,701 4,927 6,802 9,075 8,814 From Oil Wells 0 0 0 0 0 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0

87

The Effects of Hydrothermal Agingon a Commercial Cu SCR Catalyst  

Broader source: Energy.gov [DOE]

Examines the effect of hydrothermal aging on the Nox reduction over a commercial Cu-zeolite SCR catalyst.

88

Synthesis and thermoelectric properties of Cu excess Cu2ZnSnSe4  

SciTech Connect (OSTI)

Quaternary stannites with an excess of copper were successfully synthesized by reacting the constituent elements and subsequent solid state annealing, followed by densification by hot-pressing. The composition for each specimen was confirmed with a combination of Rietveld refinement and elemental analysis. Their high temperature thermoelectric properties were measured from 300 K to 800 K and compared with that of Cu2ZnSnSe4. The thermal conductivity decreases significantly with increasing Cu content at elevated temperatures due to the crystal structure of this material system. A maximum ZT value of 0.86 was obtained at 800 K for the specimen with the highest Cu content, Cu2.2Zn0.8SnSe4.

Dong, Yongkwan [University of South Florida, Tampa (USF); Wang, Hsin [ORNL; Nolas, G [University of South Florida, Tampa

2014-01-01T23:59:59.000Z

89

Cu-Bearing Tourmaline from Paraiba, Brazil  

Science Journals Connector (OSTI)

In Cu-bearing tourmaline, the octahedrally coordinated Z site is completely occupied by Al, the octahedrally coordinated Y site is occupied primarily by Li and Al, and the nine-coordinate X site is approximately half-occupied by Na.

MacDonald, D.J.

1995-04-15T23:59:59.000Z

90

Adsorption of Cu21 Ions with Poly  

E-Print Network [OSTI]

transition behavior to external stimuli such as temperature, pH, and ions. Among the most studied hydrogels, the phase transition of pNIPAAm- based copolymers could be controlled to a desired temperature range as wellAdsorption of Cu21 Ions with Poly (N-isopropylacrylamide-co-methacrylic acid) Micro

91

CU-LASP Production Capabilities! Jennifer Methlie  

E-Print Network [OSTI]

Cu, Titanium and Macor" Equipment includes:! 4-axis CNC mill 40"x20"" 3-axis CNC mill 36"x18"" 2-axis EZ-Trak" 8" Chuck CNC Lathe" Other manual milling and lathe equipment inc Hardinge tool room lathe" 30 ton

Mojzsis, Stephen J.

92

Using Matlab at CUED July 24, 2006  

E-Print Network [OSTI]

Using Matlab at CUED Tim Love July 24, 2006 Abstract This document does not try to describe matlab-beginners to undocumented and/or local features of matlab. Suggestions and contributions for this document are welcomed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 7 User Interface Controls 7 8 Local Utilities 8 1http://www-h.eng.cam.ac.uk/help/tpl/programs/matlab

Talbot, James P.

93

Preparation, optical and non-linear optical power limiting properties of Cu, CuNi nanowires  

SciTech Connect (OSTI)

Metallic nanowires show excellent Plasmon absorption which is tunable based on its aspect ratio and alloying nature. We prepared Cu and CuNi metallic nanowires and studied its optical and nonlinear optical behavior. Optical properties of nanowires are theoretically explained using Gans theory. Nonlinear optical behavior is studied using a single beam open aperture z-scan method with the use of 5?ns Nd: YAG laser. Optical limiting is found to arise from two-photon absorption.

Udayabhaskar, R.; Karthikeyan, B., E-mail: bkarthik@nitt.edu [Department of Physics, National Institute of Technology, Tiruchirappalli 620 015 (India); Ollakkan, Muhamed Shafi [Light and Matter Physics Group, Raman Research Institute, Bangalore 560 080 (India)] [Light and Matter Physics Group, Raman Research Institute, Bangalore 560 080 (India)

2014-01-06T23:59:59.000Z

94

Mechanism of methanol synthesis on Cu(100) and Zn/Cu(100) surfaces: Comparative dipped adcluster model study  

SciTech Connect (OSTI)

The mechanism of methanol synthesis from CO{sub 2} and H{sub 2} on Cu(100) and Zn/Cu(100) surfaces was studied using the dipped adcluster model (DAM) combined with ab initio Hartree-Fock (HF) and second-order Moeller-Plesset (MP2) calculations. On clean Cu(100) surface, calculations show that five successive hydrogenations are involved in the hydrogenation of adsorbed CO{sub 2} to methanol, and the intermediates are formate, dioxomethylene, formaldehyde, and methoxy. The rate-limiting step is the hydrogenation of formate to formaldehyde, and the Cu-Cu site is responsible for the reaction on Cu(100). The roles of Zn on Zn/Cu(100) catalyst are to modify the rate-limiting step of the reaction: to lower the activation energies of this step and to stabilize the dioxomethylene intermediate at the Cu-Zn site. The present comparative results indicate that the Cu-Zn site is the active site, which cooperates with the Cu-Cu site to catalyze methanol synthesis on a Cu-based catalyst. Electron transfer from surface to adsorbates is the most important factor in affecting the reactivity of these surface catalysts.

Nakatsuji, Hiroshi; Hu, Zhenming

2000-03-05T23:59:59.000Z

95

Synthesis and spectroscopic characterisation of aurichalcite (Zn,Cu2+)5(CO3)2(OH)6; implications for CuZnO catalyst precursors  

Science Journals Connector (OSTI)

The CuZnO catalyst precursors with variable Cu:Zn ratio, between Zn-rich and Cu-rich compositions have been investigated by a combination of electronic and vibrational spectroscopy. Synthesized catalyst precu...

B. Jagannadha Reddy; Ray Leslie Frost; Ashley Locke

2008-04-01T23:59:59.000Z

96

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

8 8 Illinois - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S15. Summary statistics for natural gas - Illinois, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 45 51 50 40 40 Production (million cubic feet) Gross Withdrawals From Gas Wells E 1,188 E 1,438 E 1,697 2,114 2,125 From Oil Wells E 5 E 5 E 5 7 0 From Coalbed Wells E 0 E 0 0 0 0 From Shale Gas Wells 0

97

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

50 50 North Dakota - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S36. Summary statistics for natural gas - North Dakota, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 194 196 188 239 211 Production (million cubic feet) Gross Withdrawals From Gas Wells 13,738 11,263 10,501 14,287 22,261 From Oil Wells 54,896 45,776 38,306 27,739 17,434 From Coalbed Wells 0

98

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

0 0 Mississippi - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S26. Summary statistics for natural gas - Mississippi, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 2,343 2,320 1,979 5,732 1,669 Production (million cubic feet) Gross Withdrawals From Gas Wells 331,673 337,168 387,026 429,829 404,457 From Oil Wells 7,542 8,934 8,714 8,159 43,421 From Coalbed Wells 7,250

99

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

2 2 Virginia - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S48. Summary statistics for natural gas - Virginia, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 5,735 6,426 7,303 7,470 7,903 Production (million cubic feet) Gross Withdrawals From Gas Wells R 6,681 R 7,419 R 16,046 R 23,086 20,375 From Oil Wells 0 0 0 0 0 From Coalbed Wells R 86,275 R 101,567

100

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

4 4 Michigan - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S24. Summary statistics for natural gas - Michigan, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 9,712 9,995 10,600 10,100 11,100 Production (million cubic feet) Gross Withdrawals From Gas Wells R 80,090 R 16,959 R 20,867 R 7,345 18,470 From Oil Wells 54,114 10,716 12,919 9,453 11,620 From Coalbed Wells 0

Note: This page contains sample records for the topic "bermuda cu cuba" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

2 2 Montana - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S28. Summary statistics for natural gas - Montana, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 6,925 7,095 7,031 6,059 6,477 Production (million cubic feet) Gross Withdrawals From Gas Wells R 69,741 R 67,399 R 57,396 R 51,117 37,937 From Oil Wells 23,092 22,995 21,522 19,292 21,777 From Coalbed Wells

102

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

8 8 Mississippi - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S26. Summary statistics for natural gas - Mississippi, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 2,315 2,343 2,320 1,979 5,732 Production (million cubic feet) Gross Withdrawals From Gas Wells R 259,001 R 331,673 R 337,168 R 387,026 429,829 From Oil Wells 6,203 7,542 8,934 8,714 8,159 From Coalbed Wells

103

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

8 8 Indiana - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S16. Summary statistics for natural gas - Indiana, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 2,350 525 563 620 914 Production (million cubic feet) Gross Withdrawals From Gas Wells 3,606 4,701 4,927 6,802 9,075 From Oil Wells 0 0 0 0 0 From Coalbed Wells 0 0 0 0 0 From Shale Gas Wells 0

104

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

4 4 New York - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S34. Summary statistics for natural gas - New York, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 6,680 6,675 6,628 6,736 6,157 Production (million cubic feet) Gross Withdrawals From Gas Wells 54,232 49,607 44,273 35,163 30,495 From Oil Wells 710 714 576 650 629 From Coalbed Wells 0

105

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

6 6 Texas - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S45. Summary statistics for natural gas - Texas, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 76,436 87,556 93,507 95,014 100,966 Production (million cubic feet) Gross Withdrawals From Gas Wells R 4,992,042 R 5,285,458 R 4,860,377 R 4,441,188 3,794,952 From Oil Wells 704,092 745,587 774,821 849,560 1,073,301

106

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

2 2 Ohio - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S37. Summary statistics for natural gas - Ohio, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 34,416 34,963 34,931 46,717 35,104 Production (million cubic feet) Gross Withdrawals From Gas Wells 79,769 83,511 73,459 30,655 65,025 From Oil Wells 5,072 5,301 4,651 45,663 6,684 From Coalbed Wells 0

107

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

0 0 Colorado - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S6. Summary statistics for natural gas - Colorado, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 25,716 27,021 28,813 30,101 32,000 Production (million cubic feet) Gross Withdrawals From Gas Wells 496,374 459,509 526,077 563,750 1,036,572 From Oil Wells 199,725 327,619 338,565

108

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

2 2 South Dakota - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S43. Summary statistics for natural gas - South Dakota, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 71 71 89 102 100 Production (million cubic feet) Gross Withdrawals From Gas Wells 422 R 1,098 R 1,561 1,300 933 From Oil Wells 11,458 10,909 11,366 11,240 11,516 From Coalbed Wells 0 0

109

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

6 6 Illinois - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S15. Summary statistics for natural gas - Illinois, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 43 45 51 50 40 Production (million cubic feet) Gross Withdrawals From Gas Wells RE 1,389 RE 1,188 RE 1,438 RE 1,697 2,114 From Oil Wells E 5 E 5 E 5 E 5 7 From Coalbed Wells RE 0 RE

110

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

8 8 Colorado - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S6. Summary statistics for natural gas - Colorado, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 22,949 25,716 27,021 28,813 30,101 Production (million cubic feet) Gross Withdrawals From Gas Wells R 436,330 R 496,374 R 459,509 R 526,077 563,750 From Oil Wells 160,833 199,725 327,619

111

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

0 0 Alaska - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S2. Summary statistics for natural gas - Alaska, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 239 261 261 269 277 Production (million cubic feet) Gross Withdrawals From Gas Wells 165,624 150,483 137,639 127,417 112,268 From Oil Wells 3,313,666 3,265,401 3,174,747 3,069,683 3,050,654

112

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

0 0 Ohio - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S37. Summary statistics for natural gas - Ohio, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 34,416 34,416 34,963 34,931 46,717 Production (million cubic feet) Gross Withdrawals From Gas Wells R 82,812 R 79,769 R 83,511 R 73,459 30,655 From Oil Wells 5,268 5,072 5,301 4,651 45,663 From Coalbed Wells

113

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

4 4 Kentucky - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S19. Summary statistics for natural gas - Kentucky, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 16,563 16,290 17,152 17,670 14,632 Production (million cubic feet) Gross Withdrawals From Gas Wells 95,437 R 112,587 R 111,782 133,521 122,578 From Oil Wells 0 1,529 1,518 1,809 1,665 From Coalbed Wells 0

114

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

8 8 Utah - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S46. Summary statistics for natural gas - Utah, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 5,197 5,578 5,774 6,075 6,469 Production (million cubic feet) Gross Withdrawals From Gas Wells R 271,890 R 331,143 R 340,224 R 328,135 351,168 From Oil Wells 35,104 36,056 36,795 42,526 49,947 From Coalbed Wells

115

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

6 6 California - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S5. Summary statistics for natural gas - California, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 1,540 1,645 1,643 1,580 1,308 Production (million cubic feet) Gross Withdrawals From Gas Wells 93,249 91,460 82,288 73,017 63,902 From Oil Wells R 116,652 R 122,345 R 121,949 R 151,369 120,880

116

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

0 0 Utah - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S46. Summary statistics for natural gas - Utah, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 5,578 5,774 6,075 6,469 6,900 Production (million cubic feet) Gross Withdrawals From Gas Wells 331,143 340,224 328,135 351,168 402,899 From Oil Wells 36,056 36,795 42,526 49,947 31,440 From Coalbed Wells 74,399

117

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

6 6 Louisiana - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S20. Summary statistics for natural gas - Louisiana, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 18,145 19,213 18,860 19,137 21,235 Production (million cubic feet) Gross Withdrawals From Gas Wells R 1,261,539 R 1,288,559 R 1,100,007 R 911,967 883,712 From Oil Wells 106,303 61,663 58,037 63,638 68,505

118

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

2 2 Oklahoma - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S38. Summary statistics for natural gas - Oklahoma, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 38,364 41,921 43,600 44,000 41,238 Production (million cubic feet) Gross Withdrawals From Gas Wells R 1,583,356 R 1,452,148 R 1,413,759 R 1,140,111 1,281,794 From Oil Wells 35,186 153,227 92,467 210,492 104,703

119

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

2 2 New Mexico - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S33. Summary statistics for natural gas - New Mexico, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 42,644 44,241 44,784 44,748 32,302 Production (million cubic feet) Gross Withdrawals From Gas Wells R 657,593 R 732,483 R 682,334 R 616,134 556,024 From Oil Wells 227,352 211,496 223,493 238,580 252,326

120

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

6 6 West Virginia - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S50. Summary statistics for natural gas - West Virginia, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 48,215 49,364 50,602 52,498 56,813 Production (million cubic feet) Gross Withdrawals From Gas Wells R 189,968 R 191,444 R 192,896 R 151,401 167,113 From Oil Wells 701 0 0 0 0 From Coalbed Wells

Note: This page contains sample records for the topic "bermuda cu cuba" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

6 6 Michigan - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S24. Summary statistics for natural gas - Michigan, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 9,995 10,600 10,100 11,100 10,900 Production (million cubic feet) Gross Withdrawals From Gas Wells 16,959 20,867 7,345 18,470 17,041 From Oil Wells 10,716 12,919 9,453 11,620 4,470 From Coalbed Wells 0

122

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

8 8 West Virginia - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S50. Summary statistics for natural gas - West Virginia, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 49,364 50,602 52,498 56,813 50,700 Production (million cubic feet) Gross Withdrawals From Gas Wells 191,444 192,896 151,401 167,113 397,313 From Oil Wells 0 0 0 0 1,477 From Coalbed Wells 0

123

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

80 80 Wyoming - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S52. Summary statistics for natural gas - Wyoming, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 27,350 28,969 25,710 26,124 26,180 Production (million cubic feet) Gross Withdrawals From Gas Wells R 1,649,284 R 1,764,084 R 1,806,807 R 1,787,599 1,709,218 From Oil Wells 159,039 156,133 135,269 151,871 152,589

124

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

6 6 New York - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S34. Summary statistics for natural gas - New York, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 6,675 6,628 6,736 6,157 7,176 Production (million cubic feet) Gross Withdrawals From Gas Wells 49,607 44,273 35,163 30,495 25,985 From Oil Wells 714 576 650 629 439 From Coalbed Wells 0

125

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

2 2 Wyoming - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S52. Summary statistics for natural gas - Wyoming, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 28,969 25,710 26,124 26,180 22,171 Production (million cubic feet) Gross Withdrawals From Gas Wells 1,764,084 1,806,807 1,787,599 1,709,218 1,762,095 From Oil Wells 156,133 135,269 151,871 152,589 24,544

126

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

4 4 Virginia - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S48. Summary statistics for natural gas - Virginia, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 6,426 7,303 7,470 7,903 7,843 Production (million cubic feet) Gross Withdrawals From Gas Wells 7,419 16,046 23,086 20,375 21,802 From Oil Wells 0 0 0 0 9 From Coalbed Wells 101,567 106,408

127

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

6 6 Kentucky - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S19. Summary statistics for natural gas - Kentucky, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 16,290 17,152 17,670 14,632 17,936 Production (million cubic feet) Gross Withdrawals From Gas Wells 112,587 111,782 133,521 122,578 106,122 From Oil Wells 1,529 1,518 1,809 1,665 0 From Coalbed Wells 0

128

Million Cu. Feet Percent of National Total  

Gasoline and Diesel Fuel Update (EIA)

6 6 Pennsylvania - Natural Gas 2011 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S40. Summary statistics for natural gas - Pennsylvania, 2007-2011 2007 2008 2009 2010 2011 Number of Producing Gas Wells at End of Year 52,700 55,631 57,356 44,500 54,347 Production (million cubic feet) Gross Withdrawals From Gas Wells 182,277 R 188,538 R 184,795 R 173,450 242,305 From Oil Wells 0 0 0 0 0 From Coalbed Wells 0

129

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

8 8 Texas - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S45. Summary statistics for natural gas - Texas, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 87,556 93,507 95,014 100,966 96,617 Production (million cubic feet) Gross Withdrawals From Gas Wells 5,285,458 4,860,377 4,441,188 3,794,952 3,619,901 From Oil Wells 745,587 774,821 849,560 1,073,301 860,675

130

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

0 0 Alabama - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S1. Summary statistics for natural gas - Alabama, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 6,860 6,913 7,026 7,063 6,327 Production (million cubic feet) Gross Withdrawals From Gas Wells 158,964 142,509 131,448 116,872 114,407 From Oil Wells 6,368 5,758 6,195 5,975 10,978

131

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

8 8 Louisiana - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S20. Summary statistics for natural gas - Louisiana, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 19,213 18,860 19,137 21,235 19,792 Production (million cubic feet) Gross Withdrawals From Gas Wells 1,288,559 1,100,007 911,967 883,712 775,506 From Oil Wells 61,663 58,037 63,638 68,505 49,380

132

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

4 4 South Dakota - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S43. Summary statistics for natural gas - South Dakota, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 71 89 102 100 95 Production (million cubic feet) Gross Withdrawals From Gas Wells 1,098 1,561 1,300 933 14,396 From Oil Wells 10,909 11,366 11,240 11,516 689 From Coalbed Wells 0 0 0 0 0

133

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

4 4 Kansas - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S18. Summary statistics for natural gas - Kansas, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 17,862 21,243 22,145 25,758 24,697 Production (million cubic feet) Gross Withdrawals From Gas Wells 286,210 269,086 247,651 236,834 264,610 From Oil Wells 45,038 42,647 39,071 37,194 0 From Coalbed Wells 44,066

134

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

6 6 Arkansas - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S4. Summary statistics for natural gas - Arkansas, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 5,592 6,314 7,397 8,388 8,538 Production (million cubic feet) Gross Withdrawals From Gas Wells 173,975 164,316 152,108 132,230 121,684 From Oil Wells 7,378 5,743 5,691 9,291 3,000

135

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

8 8 California - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S5. Summary statistics for natural gas - California, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 1,645 1,643 1,580 1,308 1,423 Production (million cubic feet) Gross Withdrawals From Gas Wells 91,460 82,288 73,017 63,902 120,579 From Oil Wells 122,345 121,949 151,369 120,880 70,900

136

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

4 4 Oklahoma - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S38. Summary statistics for natural gas - Oklahoma, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 41,921 43,600 44,000 41,238 40,000 Production (million cubic feet) Gross Withdrawals From Gas Wells 1,452,148 1,413,759 1,140,111 1,281,794 1,394,859 From Oil Wells 153,227 92,467 210,492 104,703 53,720

137

Million Cu. Feet Percent of National Total  

U.S. Energy Information Administration (EIA) Indexed Site

2 2 Alaska - Natural Gas 2012 Million Cu. Feet Percent of National Total Million Cu. Feet Percent of National Total Total Net Movements: - Industrial: Dry Production: Vehicle Fuel: Deliveries to Consumers: Residential: Electric Power: Commercial: Total Delivered: Table S2. Summary statistics for natural gas - Alaska, 2008-2012 2008 2009 2010 2011 2012 Number of Producing Gas Wells at End of Year 261 261 269 277 185 Production (million cubic feet) Gross Withdrawals From Gas Wells 150,483 137,639 127,417 112,268 107,873 From Oil Wells 3,265,401 3,174,747 3,069,683 3,050,654 3,056,918

138

Electrical Characterization of Cu Composition Effects in CdS/CdTe Thin-Film Solar Cells with a ZnTe:Cu Back Contact: Preprint  

SciTech Connect (OSTI)

We study the effects of Cu composition on the CdTe/ZnTe:Cu back contact and the bulk CdTe. For the back contact, its potential barrier decreases with Cu concentration while its saturation current density increases. For the bulk CdTe, the hole density increases with Cu concentration. We identify a Cu-related deep level at {approx}0.55 eV whose concentration is significant when the Cu concentration is high. The device performance, which initially increases with Cu concentration then decreases, reflects the interplay between the positive influences and negative influences (increasing deep levels in CdTe) of Cu.

Li, J. V.; Duenow, J. N.; Kuciauskas, D.; Kanevce, A.; Dhere, R. G.; Young, M. R.; Levi, D. H.

2012-07-01T23:59:59.000Z

139

Effects of Hydrothermal Aging on NH3-SCR reaction over Cu/zeolites  

SciTech Connect (OSTI)

The effects of hydrothermal treatment on model Cu/zeolite catalysts were investigated to better understand the nature of Cu species for the selective catalytic reduction of NO{sub x} by NH{sub 3}. After hydrothermal aging at 800 C for 16 h, the NO{sub x} reduction performance of Cu-ZSM-5 and Cu-beta were significantly reduced at low temperatures, while that of Cu-SSZ-13 was not affected. When the zeolite framework aluminum species were probed using solid state {sup 27}Al-NMR, significant reduction in the intensities of the tetrahedral aluminum peak was observed for Cu-ZSM-5 and Cu-beta, although no increase in the intensities of the octahedral aluminum peak was observed. When the redox behavior of Cu species was examined using H{sub 2}-TPR, it was found that Cu{sup 2+} could be reduced to Cu{sup +} and to Cu{sup 0} fir Cu-ZSM-5 and Cu-beta catalysts, while Cu{sup 2+} could be reduced to Cu{sup +} only for Cu-SSZ-13. After hydrothermal aging, CuO and Cu-aluminate species were found to form in Cu-ZSM-5 and Cu-beta, while little changes were observed for Cu-SSZ-13.

Kwak, Ja Hun; Tran, Diana N.; Burton, Sarah D.; Szanyi, Janos; Lee, Jong H.; Peden, Charles HF

2012-02-06T23:59:59.000Z

140

Charged Particle Multiplicities in Ultra-relativistic Au+Au and Cu+Cu Collisions  

E-Print Network [OSTI]

The PHOBOS collaboration has carried out a systematic study of charged particle multiplicities in Cu+Cu and Au+Au collisions at the Relativistic Heavy-Ion Collider (RHIC) at Brookhaven National Laboratory. A unique feature of the PHOBOS detector is its ability to measure charged particles over a very wide angular range from 0.5 to 179.5 deg. corresponding to |eta|<5.4. The general features of the charged particle multiplicity distributions as a function of pseudo-rapidity, collision energy and centrality, as well as system size, are discussed.

B. B. Back

2006-04-26T23:59:59.000Z

Note: This page contains sample records for the topic "bermuda cu cuba" from the National Library of EnergyBeta (NLEBeta).
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they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Thermopower of Yba2cu3o7-X, Erba2cu3o7-X  

E-Print Network [OSTI]

Engineering Department, Texas A&M University, College Station, Texas 77843 (Received 11 September 1989; revised manuscript received 25 October 1989) Resistance and absolute thermopower of high-T, oxide superconductors RBa2Cu307 (R=Y,Er) synthesized by a hot... indicates that there is no completely satisfactory theory of elec- trical transport in these superconducting oxides. INTRODUCTION Among the family of high-T, oxide superconductors, having chemical composition RBa2Cu307 ?,where R is a rare-earth metal...

BHATNAGAR, AK; PAN, R.; Naugle, Donald G.; GILBERT, GR; PANDEY, RK.

1990-01-01T23:59:59.000Z

142

Understanding ammonia selective catalytic reduction kinetics over Cu-SSZ-13 from motion of the Cu ions  

SciTech Connect (OSTI)

Cu-SSZ-13 catalysts with three Si/Al ratios, at 6, 12 and 35, are synthesized with solution ion exchange. Catalysts are characterized with surface area/pore volume measurements, temperature programmed reduction (TPR), and electron paramagnetic resonance (EPR) spectroscopy. Catalytic properties are examined using NO oxidation, ammonia oxidation, and standard ammonia selective catalytic reduction (NH3-SCR) reactions. By varying Si/Al ratios and Cu loadings, it is possible to synthesize catalysts with one dominant type of isolated Cu2+ ion species. Prior to full dehydration of the zeolite catalyst, hydrated Cu2+ ions are found to be very mobile as judged from EPR. NO oxidation is catalyzed by O-bridged Cu-dimer species that form at relatively high Cu loadings and in the presence of O2. For NH3 oxidation and standard SCR reactions, transient Cu-dimers even form at much lower Cu loadings; and these are proposed to be the active sites for reaction temperatures ? 350 C. These dimer species can be viewed as in equilibrium with monomeric Cu ion complexes. Between ~250 and 350 C, these moieties become less stable causing SCR reaction rates to decrease. At temperatures above 350 C and at low Cu loadings, Cu-dimers completely dissociate to regenerate isolated Cu2+ monomers that then locate at ion-exchange sites of the zeolite lattice. At low Cu loadings, these Cu species are the high-temperature active SCR catalytic centers. At high Cu loadings, on the other hand, both Cu-dimers and monomers are highly active in the high temperature kinetic regime, yet Cu-dimers are less selective in SCR. Brnsted acidity is also very important for SCR reactivity in the high-temperature regime. The authors gratefully acknowledge the US Department of Energy (DOE), Energy Efficiency and Renewable Energy, Vehicle Technologies Office for the support of this work. The research described in this paper was performed at the Environmental Molecular Sciences Laboratory (EMSL), a national scientific user facility sponsored by the DOEs Office of Biological and Environmental Research and located at Pacific Northwest National Laboratory (PNNL). PNNL is operated for the US DOE by Battelle.

Gao, Feng; Walter, Eric D.; Kollar, Marton; Wang, Yilin; Szanyi, Janos; Peden, Charles HF

2014-11-01T23:59:59.000Z

143

J/{psi} Production in {radical}(s{sub NN})=200 GeV Cu+Cu Collisions  

SciTech Connect (OSTI)

Yields for J/{psi} production in Cu+Cu collisions at {radical}(s{sub NN})=200 GeV have been measured over the rapidity range |y|<2.2 and compared with results in p+p and Au+Au collisions at the same energy. The Cu+Cu data offer greatly improved precision over existing Au+Au data for J/{psi} production in collisions with small to intermediate numbers of participants, in the range where the quark-gluon plasma transition threshold is predicted to lie. Cold nuclear matter estimates based on ad hoc fits to d+Au data describe the Cu+Cu data up to N{sub part}{approx}50, corresponding to a Bjorken energy density of at least 1.5 GeV/fm{sup 3}.

Adare, A.; Bickley, A. A.; Ellinghaus, F.; Glenn, A.; Kinney, E.; Nagle, J. L.; Seele, J.; Wysocki, M. [University of Colorado, Boulder, Colorado 80309 (United States); Afanasiev, S.; Isupov, A.; Litvinenko, A.; Malakhov, A.; Peresedov, V.; Rukoyatkin, P.; Zolin, L. [Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region (Russian Federation); Aidala, C.; Chi, C. Y.; Cole, B. A.; D'Enterria, D.; Jia, J. [Columbia University, New York, New York 10027 and Nevis Laboratories, Irvington, New York 10533 (United States)] (and others)

2008-09-19T23:59:59.000Z

144

Preparation of CuAlO2 and CuCrO2 thin films by solgel processing  

Science Journals Connector (OSTI)

CuAlO2 and CuCrO2 thin films were prepared by solgel processing and subsequent thermal treatment in air and inert gas atmosphere. Resistivities of 700? cm and 60? cm with optical transmissions of 65% and 32% were achieved respectively. The crystallization temperature of 700C allows the preparation of CuCrO2 on borosilicate glass. P-type conductivity was verified by Seebeck measurements and a transparent heterostructure including p-CuCrO2 showed rectifying behavior.

Stefan Gtzendrfer; Christina Polenzky; Stephan Ulrich; Peer Lbmann

2009-01-01T23:59:59.000Z

145

Non-uniform Aging on Super Duty Diesel Truck Aged Urea Cu/Zeolite...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

uniform Aging on Super Duty Diesel Truck Aged Urea CuZeolite SCR Catalysts Non-uniform Aging on Super Duty Diesel Truck Aged Urea CuZeolite SCR Catalysts CuZeolite SCR catalysts...

146

Epitaxial Growth and Microstructure of Cu2O Nanoparticle/thin...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Microstructure of Cu2O Nanoparticlethin Films on SrTiO3(100). Epitaxial Growth and Microstructure of Cu2O Nanoparticlethin Films on SrTiO3(100). Abstract: Cuprous oxide (Cu2O)...

147

Reduction of part-list cuing inhibition  

E-Print Network [OSTI]

. . . . . . . . . . . - . . ~ ~ . ~ 23 Table 3: Total Number Recalled, Reminiscence, and Hypermnesia as a Function of Incubation Interval and List Type in Experiment 2 30 Table 4: Minute-by-Minute Reminiscence as a Function of Incubation Interval and List Type in Experiment 2 33... 2. 55 1. 37 1. 55 10. 47 10. 66 6. 02 0. 19 31 2. 52 3. 05 1. 08 1. 10 10. 77 2. 04 11. 23 2. 02 6. 10 0. 88 0. 47 1. 35 30 Cued Recall Total Test 1 Total retest Reminiscence Hypermnesia 10. 17 12. 42 8. 63 2. 27 30 4. 00 3. 98 1...

Brown, Jeffrey Michael

1991-01-01T23:59:59.000Z

148

Magnetism in Ni-Cu Alloys  

Science Journals Connector (OSTI)

On the assumption that in Ni-Cu alloys the spin moment on a Ni atom depends on the local atomic environment, it was possible to find moment values for the various atomic configurations so as to give average moments in reasonable quantitative agreement with the values measured in the ferromagnetic composition range. The local environment is specified by the number of Ni nearest neighbors and the number of Ni second-nearest neighbors. This model allows also a consistent qualitative interpretation of the effect on the average moment of low-temperature annealing treatment and of plastic deformation.

C. G. Robbins; Helmut Claus; Paul A. Beck

1969-06-16T23:59:59.000Z

149

Thermokinetic investigation of binary Cu/Zn hydroxycarbonates as precursors for Cu/ZnO catalysts  

Science Journals Connector (OSTI)

Abstract A combination of thermogravimetric analysis (TG) and differential scanning calorimetry (DSC) coupled to mass spectrometry has been applied to study the thermal decomposition of Cu/Zn hydroxycarbonates, which are used as a precursor for the active methanol synthesis catalyst. Original TG and DSC profiles and results of a formal kinetic analysis of the calcination process are compared with transformations occurring in the solid phase, which has been studied by means of in situ XRD. A series of hydroxycarbonate precursors with different Cu/Zn molar ratios (40/60, 70/30, 80/20) were synthesized under conditions reported as optimum for catalytic performance. The samples contain primarily two crystalline phases, aurichalcite (Cu,Zn)5(CO3)2(OH)6 and zincian malachite (Cu,Zn)2CO3(OH)2. At least four formal decomposition stages of CO2 and H2O evolution cause the major mass loss in the TG experiments. The best-fit quality for all the studied samples was obtained for a four-step competitive reaction model. The experimental TG dependences are adequately described by the n-th order equation and 3D Jander diffusion equation. The effects of the gas flow, sample mass, and water transfer conditions on the reaction pathway were studied. The presence of H2O vapor in the reaction feed accelerates the decomposition and dramatically changes the reaction TG profile. The decomposition enthalpy of mixed Cu/Zn (80/20) hydroxycarbonate was determined, and the formation enthalpy of the decomposition intermediate, a carbonate-modified oxide, was calculated to be ?Hf=?633.75.6kJ/mol.

Andrey Tarasov; Julia Schumann; Frank Girgsdies; Nygil Thomas; Malte Behrens

2014-01-01T23:59:59.000Z

150

Deactivation Mechanism of Cu/Zeolite SCR Catalyst Due to Reductive...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Mechanism of CuZeolite SCR Catalyst Due to Reductive Hydrothermal Aging Deactivation Mechanism of CuZeolite SCR Catalyst Due to Reductive Hydrothermal Aging Better control for...

151

LOBPCG for electronic structure calculations Andrew Knyazev, CU-Denver  

E-Print Network [OSTI]

LOBPCG for electronic structure calculations Andrew Knyazev, CU-Denver 1 Center for Computational;LOBPCG for electronic structure calculations Andrew Knyazev, CU-Denver 2 Center for Computational). Several methods are available in ABINIT/VASP to calculate the electronic ground state: simple Davidson

Knyazev, Andrew

152

Kinetic Controls on Cu and Pb Sorption by Ferrihydrite  

E-Print Network [OSTI]

Kinetic Controls on Cu and Pb Sorption by Ferrihydrite A N D R E A S C . S C H E I N O and time, Cu and Pbwereboundtotheferrihydritesurfacebyformationofedge- sharing inner-sphere sorption limiting the slow sorption process. The quantification of diffusion-limited surface sites in soils

Sparks, Donald L.

153

Magnetic order and superconductivity in RBa2Cu3Oz  

Science Journals Connector (OSTI)

Mssbauer studies Fe57 in RBa2-yKy(Cu1-xFex)3Oz, with R=YandPr, y=0and0.5, x=0.01,0.05,and0.1, and z between 5.9 and 7.1, have been performed. A minority of the iron ions enter the Cu(2) site and reveal its magnetic order. For R=Y, y=0, and x=0.1, TN equals 280 and 415 K for z=6.5and6.1, respectively. The magnetic moments lie in the basal plane. In tetragonal, oxygen-rich PrBa2(Cu0.9Fe0.1)3O6.9, TN=325 K; in superconducting YBa2(Cu0.9Fe0.1)3O7.1 there is no magnetic order. In nonsuperconducting YBa1.5K0.5(Cu0.95Fe0.05)3O6.1 two distinctly inequivalent magnetic iron sites are observed, corresponding to iron in the Cu(2) site with different Ba-K neighbors. Moments of iron ions that have three Ba and one K as first-nearest neighbors have a different temperature dependence and TN (TN=450 K) from those with four Ba neighbors, where TN=415 K, showing that the antiferromagnetic exchange in the Cu(2) planes is strongly affected by the replacement of Ba2+ by K+, probably by repelling oxygen from the Cu(2) plane. In superconducting YBa1.5K0.5(Cu0.95Fe0.05)3O6.5 the iron site with TN=450 K remains magnetic. The implications of these findings on the valencies of the Cu ions are discussed.

I. Nowik; M. Kowitt; I. Felner; E. R. Bauminger

1988-10-01T23:59:59.000Z

154

Longueur de diffusion des porteurs minoritaires et structure de jonction des diodes Cu/Cu2O (*)  

E-Print Network [OSTI]

short circuit current and with the shift from cell to cell of the peak in the photovoltaic spectral cells are not sui- table for an efficient photovoltaic solar energy conversion. Revue Phys. Appl. 15, the photovoltaic spectrum and the electron beam induced current (EBIC) methods. In the two last cases, Cu/Cu2O

Paris-Sud XI, Université de

155

Photoelectrochemistry, Electronic Structure, and Bandgap Sizes of Semiconducting Cu(I)-Niobates and Cu(I)-Tantalates  

SciTech Connect (OSTI)

Semiconducting metal-oxides have remained of intense research interest owing to their potential for achieving efficient solar-driven photocatalytic reactions in aqueous solutions that occur as a result of their bandgap excitation. The photocatalytic reduction of water or carbon dioxide to generate hydrogen or hydrocarbon fuels, respectively, can be driven on p-type (photocathodic) electrodes with suitable band energies. However, metal-oxide semiconductors are typically difficult to dope as p-type with a high mobility of carriers. The supported research led to the discovery of new p-type Cu(I)-niobate and Cu(I)-tantalate film electrodes that can be prepared on FTO glass. New high-purity flux syntheses and the full structural determination of several Cu(I)-containing niobates and tantalates have been completed, as well as new investigations of their optical and photoelectrochemical properties and electronic structures via density-functional theory calculations. For example, CuNbO3, Cu5Ta11O30 and CuNb3O8 were prepared in high purity and their structures were characterized by both single-crystal and powder X-ray diffraction techniques. These two classes of Cu(I)-containing compounds exhibit optical bandgap sizes ranging from ~1.3 eV to ~2.6 eV. Photoelectrochemical measurements of these compounds show strong photon-driven cathodic currents that confirm the p-type semiconductor behavior of CuNbO3, CuNb3O8, and Cu5Ta11O30. Incident-photon-to-current efficiencies are measured that approach greater than ~1%. Electronic-structure calculations based on density functional theory reveal the visible-light absorption stems from a nearly-direct bandgap transition involving a copper-to-niobium or tantalum (d10 to d0) charge-transfer excitations.

Maggard, Paul A.

2013-11-14T23:59:59.000Z

156

Cu depletion at the CuInSe2 surface Dongxiang Liaoa)  

E-Print Network [OSTI]

and its relation to the Cd doping at the CdS/CuInSe2 interface are discussed. � 2003 American Institute%. However, there are still unresolved fundamental issues about the interface of the CIGS/CdS junction, whose that there is a large band bending in the p-type CIGS absorber, and its surface the region that contacts the CdS

Rockett, Angus

157

Coupled skyrmion sublattices in Cu2OSeO3  

SciTech Connect (OSTI)

We report the observation of a skyrmion lattice in the chiral multiferroic insulator Cu2OSeO3 using Cu L3-edge resonant soft x-ray diffraction. We observe the unexpected existence of two distinct skyrmion sub-lattices that arise from inequivalent Cu sites with chemically identical coordination numbers but different magnetically active orbitals . The skyrmion sublattices are rotated with respect to each other implying a long wavelength modulation of the lattice. The modulation vector is controlled with an applied magnetic field, associating this Moir'e-like phase with a continuous phase transition. Our findings will open a new class of science involving manipulation of quantum topological states.

Langner, M.C.; Roy,, S.; Mishra, S. K.; Lee, J. C. T.; Shi,, X. W.; Hossain, M. A.; Chuang, Y.-D.; Seki, S.; Tokura, Y.; Kevan, S. D.; Schoenlein, R. W.

2014-04-18T23:59:59.000Z

158

Crystallization of Zr2PdxCu(1-x) and Zr2NixCu(1-x) Metallic Glass  

SciTech Connect (OSTI)

One interesting aspect of rretallic glasses is the numerous instances of the deviation of the phase selection from the amorphous state to thermodynamically stable phases during the crystallization process. Their devitrification pathways allow us to study the relationship between the original amorphous structure and their crystalline counter parts. Among the various factors of phase selections, size and electronic effects have been most extensively studied. Elucidating the phase selection process of a glassy alloy will be helpful to fill in the puzzle of the changes from disordered to ordered structures. In this thesis, Two model Zr{sub 2}Pd{sub x}Cu{sub (1-x)} and Zr{sub 2}Ni{sub x}Cu{sub (1-x)} (x = 0, 0.25, 0.5, 0.75 and 1) glassy systems were investigated since: (1) All of the samples can be made into a homogenous metallic glass; (2) The atomic radii differ from Pd to Cu is by 11%, while Ni has nearly the identical atomic size compare to Cu. Moreover, Pd and Ni differ by only one valence electron from Cu. Thus, these systems are ideal to test the idea of the effects of electronic structure and size factors; (3) The small number of components in these pseudo binary systems readily lend themselves to theoretical modeling. Using high temperature X-ray diffraction {HTXRD) and thermal analysis, topological, size, electronic, bond and chemical distribution factors on crystallization selections in Zr{sub 2}Pd{sub x}Cu{sub (1-x)} and Zr{sub 2}Ni{sub x}Cu{sub (1-x)} metallic glass have been explored. All Zr{sub 2}Pd{sub x}Cu{sub (1-x)} compositions share the same Cu11b phase with different pathways of meta-stable, icosahedral quasicrystalline phase (i-phase), and C16 phase formations. The quasicrystal phase formation is topologically related to the increasing icosahedral short range order (SRO) with Pd content in Zr{sub 2}Pd{sub x}Cu{sub (1x)} system. Meta-stable C16 phase is competitive with C11b phase at x = 0.5, which is dominated by electronic structure rather than size effects. Cu-rich and Ni-rich compositions in Zr{sub 2}Ni{sub x}Cu{sub (1-x)} trend to divitrify to C11b or C16 phases respectively. In the proposed pseudo binary phase diagram, the domain of C16, C11b and co-existence phases are mainly related with the topology in the amorphous structure and formation enthalpies of crystalline phases.

Min Xu

2008-08-18T23:59:59.000Z

159

Cu Electrochemical Mechanical Planarization Surface Quality Abhinav Tripathi,a  

E-Print Network [OSTI]

containing 5-phenyl-1-H-tetrazole. The results show that surface roughness increases following Cu ECMP slurries11 and ECMP electrolytes6 that contain 5-phenyl-1-H-tetrazole PTA at pH 3. Although the ECMP

Suni, Ian Ivar

160

Laser cladding of Co-based hardfacing on Cu substrate  

Science Journals Connector (OSTI)

Cu substrates were subjected to laser cladding with Triballoy 66 SNF by means of...2 laser, preceded by the deposition of an intermediate ... Si for improving the energy coupling between the laser radiation and t...

G. Dehm; M. Bamberger

Note: This page contains sample records for the topic "bermuda cu cuba" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Autocatalytic water dissociation on Cu(110) at near ambient conditions  

E-Print Network [OSTI]

from ultra-high vacuum (UHV) studies 2,3 and theory 4-10 ,present authors under UHV conditions and low temperatures. 2on Cu(110) under ultra-high vacuum (UHV) and low temperature

Andersson, Klas

2007-01-01T23:59:59.000Z

162

A XANES study of Cu speciation in high-temperature brines using synthetic fluid inclusions  

SciTech Connect (OSTI)

Cu K-edge X-ray absorption near edge structure (XANES) spectra were recorded from individual synthetic brine fluid inclusions as a function of temperature up to 500 C. The inclusions serve as sample cells for high-temperature spectroscopic studies of aqueous Cu-Cl speciation. Cu{sup +} and Cu{sup 2+} can both be identified from characteristic pre-edge features. Mixed oxidation states can be deconvoluted using linear combinations of Cu{sup +} and Cu{sup 2+} spectra. This work illustrates how complex Cu XANES spectra can be interpreted successfully. Cu{sup 2+} is the stable oxidation state in solution at room temperature and Cu{sup +} at high temperatures. The change in oxidation state with temperature was completely reversible. Cu{sup +} was found to occur exclusively as the linear species [CuCl{sub 2}]{sup -} in solutions containing KCl with Cu:Cl ratios up to 1:6. In the absence of K{sup +}, there is evidence for higher order coordination of Cu{sup +}, in particular the tetrahedral complex [CuCl{sub 4}]{sup 3-}. The importance of such complexes in natural ore-forming fluids is yet to be determined, but may explain the vapor-phase partitioning of Cu as a Cl complex from a Cl-rich brine.

Berry, Andrew J.; Hack, Alistair C.; Mavrogenes, John A.; Newville, Matthew; Sutton, Stephen R. (UC); (ANU)

2010-12-03T23:59:59.000Z

163

Modified Ni-Cu catalysts for ethanol steam reforming  

SciTech Connect (OSTI)

Three Ni-Cu catalysts, having different Cu content, supported on ?-alumina were synthesized by wet co-impregnation method, characterized and tested in the ethanol steam reforming (ESR) reaction. The catalysts were characterized for determination of: total surface area and porosity (N{sub 2} adsorption - desorption using BET and Dollimer Heal methods), Ni surface area (hydrogen chemisorption), crystallinity and Ni crystallites size (X-Ray Diffraction), type of catalytic active centers (Hydrogen Temperature Programmed Reduction). Total surface area and Ni crystallites size are not significantly influenced by the addition of Cu, while Ni surface area is drastically diminished by increasing of Cu concentration. Steam reforming experiments were performed at atmospheric pressure, temperature range 150-350C, and ethanol - water molar ration of 1 at 30, using Ar as carrier gas. Ethanol conversion and hydrogen production increase by the addition of Cu. At 350C there is a direct connection between hydrogen production and Cu concentration. Catalysts deactivation in 24h time on stream was studied by Transmission Electron Microscopy (TEM) and temperature-programmed reduction (TPR) on used catalysts. Coke deposition was observed at all studied temperatures; at 150C amorphous carbon was evidenced, while at 350C crystalline, filamentous carbon is formed.

Dan, M.; Mihet, M.; Almasan, V.; Borodi, G. [National Institute for Research and Development of Isotopic and Molecular Technologies, 65-103 Donath Street, 400293, Cluj-Napoca (Romania)] [National Institute for Research and Development of Isotopic and Molecular Technologies, 65-103 Donath Street, 400293, Cluj-Napoca (Romania); Katona, G.; Muresan, L. [Univ. Babes Bolyai, Fac. Chem. and Chem. Eng.,11 Arany Janos, 400028, Cluj-Napoca (Romania)] [Univ. Babes Bolyai, Fac. Chem. and Chem. Eng.,11 Arany Janos, 400028, Cluj-Napoca (Romania); Lazar, M. D., E-mail: diana.lazar@itim-cj.ro [65-103 Donath Street (Romania)

2013-11-13T23:59:59.000Z

164

Analysis of the structure, configuration, and sizing of Cu and Cu oxide nanoparticles generated by fs laser ablation of solid target in liquids  

SciTech Connect (OSTI)

We report on the analysis of structure, configuration, and sizing of Cu and Cu oxide nanoparticles (Nps) produced by femtosecond (fs) laser ablation of solid copper target in liquids. Laser pulse energy ranged between 500 {mu}J and 50 {mu}J. Water and acetone were used to produce the colloidal suspensions. The study was performed through optical extinction spectroscopy using Mie theory to fit the full experimental spectra, considering free and bound electrons size dependent contributions to the metal dielectric function. Raman spectroscopy and AFM technique were also used to characterize the sample. Considering the possible oxidation of copper during the fabrication process, two species (Cu and Cu{sub 2}O) arranged in two structures (bare core or core-shell) and in two configuration types (Cu-Cu{sub 2}O or Cu{sub 2}O-Cu) were considered for the fitting depending on the laser pulse energy and the surrounding media. For water at high energy, it can be observed that a Cu-Cu{sub 2}O configuration fits the experimental spectra of the colloidal suspension, while for decreasing energy and below a certain threshold, a Cu{sub 2}O-Cu configuration needs to be included for the optimum fit. Both species coexist for energies below 170 {mu}J for water. On the other hand, for acetone at high energy, optimum fit of the full spectrum suggests the presence a bimodal Cu-Cu{sub 2}O core-shell Nps distribution while for decreasing energy and below a 70 {mu}J threshold energy value, Cu{sub 2}O-Cu core-shell Nps must be included, together with the former configuration, for the fit of the full spectrum. We discuss possible reasons for the changes in the structural configuration of the core-shell Nps.

Santillan, J. M. J. [Centro de Investigaciones Opticas (CIOp), (CONICET La Plata - CIC) (Argentina); Videla, F. A.; Schinca, D. C.; Scaffardi, L. B. [Centro de Investigaciones Opticas (CIOp), (CONICET La Plata - CIC) (Argentina); Departamento de Ciencias Basicas, Facultad de Ingenieria, UNLP (Argentina); Fernandez van Raap, M. B. [Departamento de Fisica-IFLP, Universidad Nacional de La Plata-CONICET, L. B. Scaffardi: CIOp CC3 (1897) Gonnet, La Plata (Argentina)

2013-04-07T23:59:59.000Z

165

Magnetism and superconductivity in Sr YRu Cu O and magnetism in Ba GdRu Cu O  

Science Journals Connector (OSTI)

We report magnetization, surface resistance ( ), and electron spin resonance (ESR) for non-superconducting Ba2GdRu1-uCuuO6, and find that all three magnetic ions (Gd, Ru, and Cu...

H.A. Blackstead; John D. Dow; D.R. Harshman

2000-06-01T23:59:59.000Z

166

Optical and electrochemical properties of CuInSe2 and CuInS2?CuInSe2 alloys  

Science Journals Connector (OSTI)

The fundamental optical transitions in single crystals of CuInS2 x Se2 ? 2 x alloys have been studied by electrolyte electroreflectance (EER) spectroscopy. The band gap of the alloys increases nonlinearly with increasing sulphur content corresponding to a bowing parameter 0.14. The flatband potential derived from the EER spectra is in excellent agreement with differential capacitance measurements and determined as ?0.350 V versus the saturated calomel electrode. CuInS2x Se2?2x liquid junction solar cells are reported that exhibit a long wavelength cutoff in the spectral response matching the EER data.

H. Neff; P. Lange; M. L. Fearheiley; K. J. Bachmann

1985-01-01T23:59:59.000Z

167

Different adsorbate binding mechanisms of hydrocarbons: Theoretical studies for Cu(111)C2H2 and Cu(111)C2H4  

E-Print Network [OSTI]

Different adsorbate binding mechanisms of hydrocarbons: Theoretical studies for Cu(111)±C2H2 and Cu qualitatively different adsorbate binding mechanisms, depending on the adsorbate and substrate material. Experiments on Cu(111)±C2H2 identify a strongly distorted adsorbate while the adsorption energy is small

168

Magnetic interactions in 3d metal chains on Cu[subscript 2]X/Cu(001) (X = N, O): Comparison with corresponding unsupported chains  

E-Print Network [OSTI]

In this work we present a systematic study of the magnetic interactions within 3d transition-metal chains adsorbed on Cu[subscript 2]N and Cu[subscript 2]O monolayers grown on Cu(001). We are interested in the particular ...

Urdaniz, M. C.

169

Coincidence of Climatic and Faunal Fluctuations in Pleistocene Bermuda  

Science Journals Connector (OSTI)

...for which a possible physical explan-ation is available (6). The significant correlation between 180 in the Camp Century core and the The relationship between organism and environment is the common ground of two disciplines. Evolutionists...

Stephen Jay Gould

1970-05-01T23:59:59.000Z

170

Thermoelectric properties of chalcopyrite type CuGaTe{sub 2} and chalcostibite CuSbS{sub 2}  

SciTech Connect (OSTI)

Electronic and transport properties of CuGaTe{sub 2}, a hole-doped ternary copper based chalcopyrite type semiconductor, are studied using calculations within the Density Functional Theory and solving the Boltzmann transport equation within the constant relaxation time approximation. The electronic band structures are calculated by means of the full-potential linear augmented plane wave method, using the Tran-Blaha modified Becke-Johnson potential. The calculated band gap of 1.23?eV is in agreement with the experimental value of 1.2?eV. The carrier concentration- and temperature dependent thermoelectric properties of CuGaTe{sub 2} are derived, and a figure of merit of zT?=?1.69 is obtained at 950?K for a hole concentration of 3.710{sup 19}?cm{sup ?3}, in agreement with a recent experimental finding of zT?=?1.4, confirming that CuGaTe{sub 2} is a promising material for high temperature thermoelectric applications. The good thermoelectric performance of p-type CuGaTe{sub 2} is associated with anisotropic transport from a combination of heavy and light bands. Also for CuSbS{sub 2} (chalcostibite), a better performance is obtained for p-type than for n-type doping. The variation of the thermopower as a function of temperature and concentration suggests that CuSbS{sub 2} will be a good thermoelectric material at low temperatures, similarly to the isostructural CuBiS{sub 2} compound.

Kumar Gudelli, Vijay; Kanchana, V., E-mail: kanchana@iith.ac.in [Department of Physics, Indian Institute of Technology Hyderabad, Ordnance Factory Estate, Yeddumailaram 502 205, Andhra Pradesh (India); Vaitheeswaran, G. [Advanced Centre of Research in High Energy Materials (ACRHEM), University of Hyderabad, Prof. C. R. Rao Road, Gachibowli, Hyderabad 500 046, Andhra Pradesh (India); Svane, A.; Christensen, N. E. [Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C (Denmark)

2013-12-14T23:59:59.000Z

171

Phase-Pure Cu,Zn,Al Hydrotalcite-like Materials as Precursors for Copper rich Cu/ZnO/Al2O3 Catalysts  

Science Journals Connector (OSTI)

Zincian malachite or rosasite (Cu,Zn)2(CO3)(OH), aurichalcite (Cu,Zn)5(CO3)2(OH)6, and hydrotalcite-like (htl) materials of the general composition ((Cu,Zn)1?xAlx)(OH)2(CO3)x/2m H2O are the typical hydroxy carbonate precursor phases for such catalysts. ... (5) The relevance of the individual precursor phases for applied Cu/ZnO/Al2O3 or binary Cu/ZnO model catalysts is controversially discussed in the literature and aurichalcite,(6) rosasite,(7) zincian malachite,(1, 8) or a phase mixture of rosasite and hydrotalcite(9) have been suggested as desired precursor phases leading to highly active catalysts. ... (52) It is noted that such carbonate species have also been observed for the binary CuZn precursors zincian malachite and aurichalcite in course of the preparation of Cu/ZnO catalysts. ...

Malte Behrens; Igor Kasatkin; Stefanie Khl; Gisela Weinberg

2009-12-22T23:59:59.000Z

172

Calculated electronic structure of metastable phases of Cu  

Science Journals Connector (OSTI)

The electronic energy band and ground-state properties for the existing body-centered-cubic (bcc) and body-centered-tetragonal (bct) crystals, and the predicted hexagonal-close-packed (hcp) structure of elemental copper have been calculated by using first-principles density-functional linear muffin-tin orbital methods in a unified scheme. Results are presented in the form of the energy-band structure in k space and the total energy as a function of the lattice constant. A recent proposed generalized gradient approximation scheme gives more accurate values than the standard local-density approximation. The calculated band structure of bct-Cu is in good agreement with that measured in photoemission experiments, on Cu films grown epitaxialy on Pd{001} and on Pt{001}. The equilibrium lattice constants given by us are in good agreement with those obtained from experiments on bct-Cu and bcc-Cu films. The possibility of the existence of an artificial structure of hcp-Cu has been discussed.

Yumei Zhou; Wuyan Lai; Jianqing Wang

1994-02-15T23:59:59.000Z

173

Growth and transport properties of Y-Ba-Cu-O/Pr-Ba-Cu-O superlattices  

SciTech Connect (OSTI)

The pulsed-laser deposition method has been used to fabricate epitaxial, nonsymmetric M(Y) {times} N(Pr) superlattices in which YBa{sub 2}Cu{sub 3}O{sub 7-x} (YBCO) layers either M = 1,2,3,4,8, or 16 c-axis unit cells thick are separated by insulating PrBa{sub 2}Cu{sub 3}O{sub 7-x} (PBCO) layers N unit cells thick (N = 1 to {approximately}32). The zero-resistance superconducting transition temperature, T{sub c0}, initially decreases rapidly with increasing PBCO layer thickness, but then saturates at T{sub c0} {approximately} 19 K, 54 K, 71 K, or 80 K, or structures containing 1-,2-,3-, or 4-cell-thick YBCO layers, respectively. Critical current density measurements carried out on structures with 16- or 32-cell thick YBCO layers show that the magnitude of J{sub c}(H = 0) {approximately} 1-2 MA/cm{sup 2}, as well as the magnetic field dependence and the anisotropy of J{sub c}(H) all are in good agreement with corresponding measurements on thicker, single-layer YBCO films. Thus, there is no evidence of an enhanced J{sub c}(H) due to the multi-layered structure, for the layer thickness investigated to date. The systematic variation of T{sub c0}, as a function of the YBCO and PBCO layer thickness, is discussed in light of other recent experiments and theoretical model calculations. The superlattices' structural and compositional order are characterized using x-ray diffraction, transmission electron microscopy, and scanning tunneling microscopy, and details of the pulsed-laser deposition process are reported. 42 refs., 7 figs.

Lowndes, D.H.; Norton, D.P.; Budai, J.D.; Christen, D.K.; Klabunde, C.E.; Warmack, R.J.; Pennycook, S.J.

1990-01-01T23:59:59.000Z

174

Photovolatic effect in CdS-Cu2S heterojunctions  

Science Journals Connector (OSTI)

The current-voltage characteristic of CdS-Cu2S solar cells is analyzed in terms of the contributing physical effects. In Cu2S it is minority-carrier generation and diffusion, in CdS it is a Schottky barrier layer with sliding boundary conditions, nj(j), and the development of high-field domains which control the current. These domains are responsible for current saturation, but they may also limit the current to a value below the one which can be supplied from Cu2S, hence they present a ceiling for the observed short-circuit current. The given model is in satisfactory agreement with several experimental observations not previously understood.

K. W. Ber

1976-06-15T23:59:59.000Z

175

Three approaches to economical photovoltaics: conformal Cu2S, organic luminescent films, and PbSe nanocrystal superlattices  

E-Print Network [OSTI]

approaches to economical photovoltaics: conformal Cu 2 S,routes to more efficient photovoltaics using conformal Cu 2on grid-parity. Progress in Photovoltaics: Research and

Carbone, Ian Anthony

2013-01-01T23:59:59.000Z

176

The Different Impacts of SO2 and SO3 on Cu/Zeolite SCR Catalysts...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

The Different Impacts of SO2 and SO3 on CuZeolite SCR Catalysts. The Different Impacts of SO2 and SO3 on CuZeolite SCR Catalysts. Abstract: The different impacts of SO2 and SO3...

177

Sulfur Effect and Performance Recovery of a DOC + CSF + Cu-Zeolite...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Sulfur Effect and Performance Recovery of a DOC + CSF + Cu-Zeolite SCR System Sulfur Effect and Performance Recovery of a DOC + CSF + Cu-Zeolite SCR System effect and performance...

178

Structure-Activity Relationships in NH3-SCR over Cu-SSZ-13 as...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Structure-Activity Relationships in NH3-SCR over Cu-SSZ-13 as Probed by Reaction Kinetics and EPR Studies. Structure-Activity Relationships in NH3-SCR over Cu-SSZ-13 as Probed by...

179

Photovoltaic characteristics of TCNQ-incorporated CuPc-poly(p-phenylene) composite films  

Science Journals Connector (OSTI)

Composite films (CuPcPPPTCNQ) were produced by simultaneous deposition using copper phthalocyanine (CuPc) as a carrier generation material, poly(p-phenylene) (PPP) as a hole transport material, and tetracyan...

Takayuki Iwase; Yutaka Haga

2004-09-01T23:59:59.000Z

180

Mechanistic Studies of Methanol Synthesis over Cu from CO/CO2...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

of Methanol Synthesis over Cu from COCO2H2H2O Mixtures: the Source of C in Methanol and the Role of Water Mechanistic Studies of Methanol Synthesis over Cu from COCO2H2H2O...

Note: This page contains sample records for the topic "bermuda cu cuba" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

E-Print Network 3.0 - al-cu-fe quasicrystalline plasma Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

thin films in the Al rich region of the Al-Cu-Fe-Cr quasicrystalline phase field... in UHV of magnetron sputtered Al-Cu-Fe-Cr quasicrystalline thin films. We also confirm the...

182

E-Print Network 3.0 - alloy fracture cu-ni Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

fracture cu-ni Search Powered by Explorit Topic List Advanced Search Sample search results for: alloy fracture cu-ni Page: << < 1 2 3 4 5 > >> 1 Ris-R-1276(EN) Final Report...

183

Predictive GIS model for potential mapping of Cu, Pb, Zn mineralization  

Science Journals Connector (OSTI)

The geologic features indicative of Cu, Pb, Zn mineral deposits in a area are fractures (structure), and host rock sediments. Datasets used include Cu, Pb, Zn deposit points record, geological data, remote sensin...

Tarik B. Benomar Ph. D.; Bian Fuling

2006-06-01T23:59:59.000Z

184

Elucidating efficiency losses in cuprous oxide (Cu?O) photovoltaics and identifying strategies for efficiency improvement  

E-Print Network [OSTI]

In this thesis, I fabricated and characterized a series of thin-film cuprous oxide (Cu?O) photovoltaic devices. I constructed several different device designs, using sputtered and electrochemically deposited Cu?O. ...

Brandt, Riley Eric

2013-01-01T23:59:59.000Z

185

Effects of the Calcination and Reduction Conditions on a Cu/ZnO Methanol Synthesis Catalyst  

Science Journals Connector (OSTI)

The CuO crystallite size of the catalysts obtained from aurichalcite greatly depends on the heating rate of...

Shin-ichiro Fujita; Shuhei Moribe

2000-05-01T23:59:59.000Z

186

Dehydrogenation of Ethanol Over Cu/ZnO Catalysts Prepared from Various Coprecipitated Precursors  

Science Journals Connector (OSTI)

For the title reaction, Cu/ZnO catalysts prepared from aurichalcite were more active than those prepared from...2

Shin-ichiro Fujita; Nobuhiro Iwasa; Hiroaki Tani

187

Possibilities of increasing the efficiency of Si and CuInSe2 solar cells  

Science Journals Connector (OSTI)

The paper proposes a method of increasing the efficiency of Si and CuInSe2 solar cells using the impact ionization and impurity...pZnTe-pSi-nSi and pZnTe-pCuInSe2-n(CuInSe2)1?x (2InAs) ...

M. S. Saidov

2011-09-01T23:59:59.000Z

188

DISSERTATION DEVICE PHYSICS OF Cu(In,Ga)Se2 THIN-FILM SOLAR CELLS  

E-Print Network [OSTI]

DISSERTATION DEVICE PHYSICS OF Cu(In,Ga)Se2 THIN-FILM SOLAR CELLS Submitted by Markus Gloeckler PHYSICS OF Cu(In,Ga)Se2 THIN-FILM SOLAR CELLS BE ACCEPTED AS FULFILLING IN PART REQUIREMENTS OF Cu(In,Ga)Se2 THIN-FILM SOLAR CELLS Thin-film solar cells have the potential to be an important

Sites, James R.

189

Conjugate heat transfer in a room with a laminated glazing with CuS or CuSCu2?xSe  

Science Journals Connector (OSTI)

Abstract A numerical study of the heat transfer in a room with a laminated glazing wall with solar control films is presented. The thermal evaluation was performed on three different configurations of the laminated glazing, with films of CuSCu2?xSe or CuS using polyvinyl butyral (PVB) and/or polyethylene terephthalate (PET). For a reference case, a single glazing was evaluated. In order to observe the effect of the conjugate heat transfer on the inside environment of the system, thermal efficiency (?t) was defined; this is the ratio between the total heat flux towards the inside environment regarding the incident solar energy on glazing. The results show that the adhesion of two solar control films at laminated glazing presents better values of thermal efficiency for different values of solar radiation (G) and outside temperature (Text). Also, with the aim of applying these results to other contexts, we computed the values obtained for the solar heat gain coefficient (SHGC). The SHGC was determined for the summer conditions stated in ISO 15099 and ASHRAE. The SHGC results were predicted in a range of 0.360?SHGC?0.499 and 0.504?SHGC?0.595 for the conditions of ISO 15099 and ASHRAE, respectively.

J. Xamn; I. Zavala-Guilln; J.O. Aguilar; G. lvarez; C. Lpez-Mata; J. Arce

2014-01-01T23:59:59.000Z

190

Cardiologists from CU testing revolutionary heart-attack treatment  

E-Print Network [OSTI]

Cardiologists from CU testing revolutionary heart-attack treatment Compiled 4.12.2013 23 of the biologically degradable stent in the treatment of myocardial infarctions (heart-attacks). The results with a metal stent in their heart for the rest of their life; instead, the stent does its work then disappears

Cerveny, Vlastislav

191

Carl Wieman UBC & CU Colorado physics & chem education research group  

E-Print Network [OSTI]

Carl Wieman UBC & CU Colorado physics & chem education research group: W. Adams, K. Perkins, K-- transforming brain Think about and use science like a scientist. What does that mean? How is it accomplished/reflection. Change brain "wiring" *Cambridge Handbook on Expertise and Expert Performance patterns, associations

Southern California, University of

192

Efficient solar energy conversion with CuInS2  

Science Journals Connector (OSTI)

... film is displayed in the inset of Fig. 26. The light attenuation for photon energies above the CuInS2 band gap (830 nm) can be estimated by the area under ... the area under the transmittivity curve. Since the total transmission is 25% in this energy range, a correction factor of 4 for efficiency calculation is obtained. This would result ...

H. J. Lewerenz; H. Goslowsky; K.-D. Husemann; S. Fiechter

1986-06-12T23:59:59.000Z

193

Water-gas shift reaction over Cu/ZnO and Cu/ZnO/Al2O3 catalysts prepared by homogeneous precipitation  

Science Journals Connector (OSTI)

Both binary Cu/ZnO and ternary Cu/ZnO/Al2O3 catalysts were prepared by homogeneous precipitation (hp) using urea hydrolysis. The structure and the activity for the water-gas shift reaction of these catalysts were studied compared with those prepared by coprecipitation (cp). The binary precursors contained hydroxycarbonates such as malachite and aurichalcite phases, whereas the ternary precursors were composed of hydrotalcite, malachite and aurichalcite phases depending on the metal composition. After thermal decomposition, both catalysts contained apparently CuO and ZnO as crystalline phase. No phase derived from Al was observed, since the amount of Al was small as 10at.% in the ternary catalysts. After reduction pretreatment with hydrogen, the catalysts were tested for the shift reaction between 150 and 300C. The activity of hp-catalysts was higher than that of cp-catalysts; binary hp-Cu/ZnO showed higher activity than ternary hp-Cu/ZnO/Al2O3 catalysts none the less the surface area was larger for the latter than for the former. The activity apparently depended on the surface area of Cu metal formed on the surface of hp-catalysts and a good correlation was observed between the Cu metal particle size and the activation energy of the shift reaction. However, more precise evaluation of the activity based on turn-over frequency strongly suggested the formation of Cu+ species as the active sites at the boundary between Cu metal particles and ZnO particles. Even after the pre-reduction at the high temperature, 250C, hp-Cu/ZnO catalyst showed no significant deactivation as well as no detectable sintering of the Cu metal particles during 50h of the reaction, indicating that the hp-preparation method afforded the Cu catalysts with high sustainability in the shift reaction.

Tetsuya Shishido; Manabu Yamamoto; Dalin Li; Yan Tian; Hiroyuki Morioka; Masahide Honda; Tsuneji Sano; Katsuomi Takehira

2006-01-01T23:59:59.000Z

194

Magnetic dipole moment of 57,59Cu measured by in-gas-cell laser spectroscopy  

E-Print Network [OSTI]

In-gas-cell laser spectroscopy study of the 57,59,63,65Cu isotopes has been performed for the first time using the 244.164 nm optical transition from the atomic ground state of copper. The nuclear magnetic dipole moments for 57,59,65Cu relative to that of 63Cu have been extracted. The new value for 57Cu of mu(57Cu) = +2.582(7)mu_N is in strong disagreement with the previous literature value but in good agreement with recent theoretical and systematic predictions.

T. E. Cocolios; A. N. Andreyev; B. Bastin; N. Bree; J. Buscher; J. Elseviers; J. Gentens; M. Huyse; Yu. Kudryavtsev; D. Pauwels; T. Sonoda; P. Van den Bergh; P. Van Duppen

2009-06-16T23:59:59.000Z

195

Energy and system size dependence of phi meson production in Cu+Cu and Au+Au collisions  

SciTech Connect (OSTI)

We study the beam-energy and system-size dependence of {phi} meson production (using the hadronic decay mode {phi} {yields} K{sup +}K{sup -}) by comparing the new results from Cu + Cu collisions and previously reported Au + Au collisions at {radical}s{sub NN} = 62.4 and 200 GeV measured in the STAR experiment at RHIC. Data presented are from midrapidity (|y| < 0.5) for 0.4 < p{sub T} < 5 GeV/c. At a given beam energy, the transverse momentum distributions for {phi} mesons are observed to be similar in yield and shape for Cu + Cu and Au + Au colliding systems with similar average numbers of participating nucleons. The {phi} meson yields in nucleus-nucleus collisions, normalized by the average number of participating nucleons, are found to be enhanced relative to those from p + p collisions with a different trend compared to strange baryons. The enhancement for {phi} mesons is observed to be higher at {radical}s{sub NN} = 200 GeV compared to 62.4 GeV. These observations for the produced {phi}(s{bar s}) mesons clearly suggest that, at these collision energies, the source of enhancement of strange hadrons is related to the formation of a dense partonic medium in high energy nucleus-nucleus collisions and cannot be alone due to canonical suppression of their production in smaller systems.

STAR Coll

2008-10-28T23:59:59.000Z

196

Energy and system size dependence of ?meson production in Cu+Cu and Au+Au collisions  

E-Print Network [OSTI]

We study the beam-energy and system-size dependence of \\phi meson production (using the hadronic decay mode \\phi -- K+K-) by comparing the new results from Cu+Cu collisions and previously reported Au+Au collisions at \\sqrt{s_NN} = 62.4 and 200 GeV measured in the STAR experiment at RHIC. Data presented are from mid-rapidity (|y|energy, the transverse momentum distributions for \\phi mesons are observed to be similar in yield and shape for Cu+Cu and Au+Au colliding systems with similar average numbers of participating nucleons. The \\phi meson yields in nucleus-nucleus collisions, normalised by the average number of participating nucleons, are found to be enhanced relative to those from p+p collisions with a different trend compared to strange baryons. The enhancement for \\phi mesons is observed to be higher at \\sqrt{s_NN} = 200 GeV compared to 62.4 GeV. These observations for the produced \\phi(s\\bar{s}) mesons clearly suggest that, at these collision energies, the source of enhancement of strange hadrons is related to the formation of a dense partonic medium in high energy nucleus-nucleus collisions and cannot be alone due to canonical suppression of their production in smaller systems.

STAR Collaboration

2008-10-28T23:59:59.000Z

197

Utility of reactively sputtered CuN{sub x} films in spintronics devices  

SciTech Connect (OSTI)

We have studied nitrified copper (CuN{sub x}) thin films grown by reactive sputtering in the context of spintronic devices. The Ar-to-N{sub 2} flow ratio enables tunability of the electrical resistivity and surface roughness of the CuN{sub x} films, with the former increasing to nearly 20 times that of Cu, and the latter reduced to the atomic scale. Incorporating this into a Ta/CuN{sub x}/Ta seed stack for spin valves improves the current-in-plane (CIP) magnetoresistance; maximum magnetoresistance results with CuN{sub x} seed layer and Cu interlayer. Finally, finite element modeling results are presented that suggest the use of CuN{sub x} in nanocontact spin torque oscillators can enhance current densities by limiting the current spread through the device. This may positively impact threshold currents, power requirements, and device reliability.

Fang Yeyu [Physics Department, Goeteborg University, 412 96 Goeteborg (Sweden); Persson, J. [Physics Department, Goeteborg University, 412 96 Goeteborg (Sweden); NanOsc AB, Electrum 205, 164 40 Kista (Sweden); Zha, C. [Materials Physics Department, Royal Institute of Technology, Electrum 229, 164 40 Kista (Sweden); Willman, J.; Miller, Casey W. [Department of Physics, Center for Integrated Functional Materials, University of South Florida, 4202 East Fowler Avenue, Tampa, Florida 33620 (United States); Aakerman, Johan [Physics Department, Goeteborg University, 412 96 Goeteborg (Sweden); NanOsc AB, Electrum 205, 164 40 Kista (Sweden); Materials Physics Department, Royal Institute of Technology, Electrum 229, 164 40 Kista (Sweden)

2012-04-01T23:59:59.000Z

198

HMA1, a new Cu-ATPase of the chloroplast envelope, is essential for growth under adverse light conditions  

E-Print Network [OSTI]

an additional way to the previously characterized chloroplast envelope Cu-ATPase PAA1 to import Cu are PAA1 (4) and very recently PAA2 (5), two P1B-type ATPases. PAA1, localized into the chloroplast envelope, supplies Cu to the chloroplast, whereas PAA2, localized into the thylakoid membrane, delivers Cu to the

199

Comparative Study of the Defect Point Physics and Luminescence of the Kesterites Cu2ZnSnS4 and Cu2ZnSnSe4 and Chalcopyrite Cu(In,Ga)Se2: Preprint  

SciTech Connect (OSTI)

In this contribution, we present a comparative study of the luminescence of the kesterites Cu2ZnSnS4 (CZTS) and Cu2ZnSnSe4 (CZTSe) and their related chalcopyrite Cu(In,Ga)Se2 (CIGSe). Luminescence spectroscopy suggests that the electronic properties of Zn-rich, Cu-poor kesterites (both CZTS and CZTSe) and Cu-poor CIGSe are dictated by fluctuations of the electrostatic and chemical potentials. The large redshift in the luminescence of grain boundaries in CIGSe, associated with the formation of a neutral barrier is clearly observed in CZTSe, and, to some extent, in CZTS. Kesterites can therefore replicate the fundamental electronic properties of CIGSe.

Romero, M. J.; Repins, I.; Teeter, G.; Contreras, M.; Al-Jassim, M.; Noufi, R.

2012-08-01T23:59:59.000Z

200

CuZnO and CuZnO/Al2O3 Catalysts for the Reverse Water-Gas Shift Reaction. The Effect of the Cu/Zn Ratio on Precursor Characteristics and on the Activity of the Derived Catalysts  

Science Journals Connector (OSTI)

Comparison is made between CuZnO and alumina-supported CuZnO as catalysts for the reverse water-gas shift (RWGS) reaction. For both types of catalyst the Cu/Zn ratio has been varied between Cu-rich and Zn-ri...

Frank S. Stone; David Waller

2003-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "bermuda cu cuba" from the National Library of EnergyBeta (NLEBeta).
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201

? + SR studies on Sr2CuO2Cl2, La2CuO4 and Nd2CuO4: 2-d magnetism, local fields and muon sitesSR studies on Sr2CuO2Cl2, La2CuO4 and Nd2CuO4: 2-d magnetism, local fields and muon sites  

Science Journals Connector (OSTI)

We compare the temperature dependence of the zero-field muon spin precession frequency observed in Sr2CuO2Cl2 and La2CuO4...below the Nel temperature with a 2-d Heisenberg model with an additional small anisotro...

L. P. Le; G. M. Luke; B. J. Sternlieb; Y. J. Uemura; J. H. Brewer

1991-02-01T23:59:59.000Z

202

Photodetecting Properties of CuInSe2 Homojunctions  

Science Journals Connector (OSTI)

We studied the photovoltaic properties of homojunctions prepared by indium diffusion on p-type CuInSe2 at liquid nitrogen and room temperatures. The CuInSe2 was grown by the Bridgman method. We obtained the photovolatic spectra for both parallel and perpendicular incident lights with respect to the plane of the junciton (both on the p and n sides). The wavelength range was between 1.4 m and 0.8 m. We calculated a quantum efficiency of 40% at room temperature. This efficiency remained approximately constant between 1.2 m and 0.9 m. We have also measured response times for the junction at 300K. For change of incident light the response time is 1.2?10-6 sec and for change of bias the response time is 4?10-7 sec.

J. Gonzlez; C. Rincn; A. Redondo; P. Negrete

1980-01-01T23:59:59.000Z

203

Adsorption-induced distortion of F16CuPc on Cu(111) and Ag(111): An x-ray standing wave study A. Gerlach,1  

E-Print Network [OSTI]

still fragmentary understanding of the complex interaction of aro- matic molecules with metal substrates-substrate interaction on metals organic compounds may undergo structural changes upon adsorption.3,6 In this context we chose to study perflu- orinated copper-phthalocyanine F16CuPc, see Fig. 1 a on Cu 111 and Ag 111 using

Schreiber, Frank

204

Systematic Study of Azimuthal Anisotropy in Cu$+$Cu and Au$+$Au Collisions at $\\sqrt{s_{_{NN}}} = 62.4$ and 200~GeV  

E-Print Network [OSTI]

We have studied the dependence of azimuthal anisotropy $v_2$ for inclusive and identified charged hadrons in Au$+$Au and Cu$+$Cu collisions on collision energy, species, and centrality. The values of $v_2$ as a function of transverse momentum $p_T$ and centrality in Au$+$Au collisions at $\\sqrt{s_{_{NN}}}$=200~GeV and 62.4~GeV are the same within uncertainties. However, in Cu$+$Cu collisions we observe a decrease in $v_2$ values as the collision energy is reduced from 200 to 62.4~GeV. The decrease is larger in the more peripheral collisions. By examining both Au$+$Au and Cu$+$Cu collisions we find that $v_2$ depends both on eccentricity and the number of participants, $N_{\\rm part}$. We observe that $v_2$ divided by eccentricity ($\\varepsilon$) monotonically increases with $N_{\\rm part}$ and scales as ${N_{\\rm part}^{1/3}}$. The Cu$+$Cu data at 62.4 GeV falls below the other scaled $v_{2}$ data. For identified hadrons, $v_2$ divided by the number of constituent quarks $n_q$ is independent of hadron species as...

Adare, A; Aidala, C; Ajitanand, N N; Akiba, Y; Al-Bataineh, H; Al-Jamel, A; Alexander, J; Aoki, K; Aphecetche, L; Armendariz, R; Aronson, S H; Asai, J; Atomssa, E T; Averbeck, R; Awes, T C; Azmoun, B; Babintsev, V; Baksay, G; Baksay, L; Baldisseri, A; Barish, K N; Barnes, P D; Bassalleck, B; Bathe, S; Batsouli, S; Baublis, V; Bauer, F; Bazilevsky, A; Belikov, S; Bennett, R; Berdnikov, Y; Bickley, A A; Bjorndal, M T; Boissevain, J G; Borel, H; Boyle, K; Brooks, M L; Brown, D S; Bucher, D; Buesching, H; Bumazhnov, V; Bunce, G; Burward-Hoy, J M; Butsyk, S; Campbell, S; Chai, J -S; Chang, B S; Charvet, J -L; Chernichenko, S; Chi, C Y; Chiba, J; Chiu, M; Choi, I J; Chujo, T; Chung, P; Churyn, A; Cianciolo, V; Cleven, C R; Cobigo, Y; Cole, B A; Comets, M P; Constantin, P; Csand, M; Csrg?, T; Dahms, T; Das, K; David, G; Deaton, M B; Dehmelt, K; Delagrange, H; Denisov, A; d'Enterria, D; Deshpande, A; Desmond, E J; Dietzsch, O; Dion, A; Donadelli, M; Drachenberg, J L; Drapier, O; Drees, A; Dubey, A K; Durum, A; Dzhordzhadze, V; Efremenko, Y V; Egdemir, J; Ellinghaus, F; Emam, W S; Enokizono, A; En'yo, H; Espagnon, B; Esumi, S; Eyser, K O; Fields, D E; Finger, M; Finger, M; Jr., \\,; Fleuret, F; Fokin, S L; Forestier, B; Fraenkel, Z; Frantz, J E; Franz, A; Frawley, A D; Fujiwara, K; Fukao, Y; Fung, S -Y; Fusayasu, T; Gadrat, S; Garishvili, I; Gastineau, F; Germain, M; Glenn, A; Gong, H; Gonin, M; Gosset, J; Goto, Y; de Cassagnac, R Granier; Grau, N; Greene, S V; Perdekamp, M Grosse; Gunji, T; Gustafsson, H -; Hachiya, T; Henni, A Hadj; Haegemann, C; Haggerty, J S; Hagiwara, M N; Hamagaki, H; Han, R; Harada, H; Hartouni, E P; Haruna, K; Harvey, M; Haslum, E; Hasuko, K; Hayano, R; He, X; Heffner, M; Hemmick, T K; Hester, T; Heuser, J M; Hiejima, H; Hill, J C; Hobbs, R; Hohlmann, M; Holmes, M; Holzmann, W; Homma, K; Hong, B; Horaguchi, T; Hornback, D; Huang, S; Hur, M G; Ichihara, T; Iinuma, H; Imai, K; Inaba, M; Inoue, Y; Isenhower, D; Isenhower, L; Ishihara, M; Isobe, T; Issah, M; Isupov, A; Jacak, B V; Jia, J; Jin, J; Jinnouchi, O; Johnson, B M; Joo, K S; Jouan, D; Kajihara, F; Kametani, S; Kamihara, N; Kamin, J; Kaneta, M; Kang, J H; Kanou, H; Kawagishi, T; Kawall, D; Kazantsev, A V; Kelly, S; Khanzadeev, A; Kikuchi, J; Kim, D H; Kim, D J; Kim, E; Kim, Y -S; Kinney, E; Kiss, ; Kistenev, E; Kiyomichi, A; Klay, J; Klein-Boesing, C; Kochenda, L; Kochetkov, V; Komkov, B; Konno, M; Kotchetkov, D; Kozlov, A; Krl, A; Kravitz, A; Kroon, P J; Kubart, J; Kunde, G J; Kurihara, N; Kurita, K; Kweon, M J; Kwon, Y; Kyle, G S; Lacey, R; Lai, Y S; Lajoie, J G; Lebedev, A; Bornec, Y Le; Leckey, S; Lee, D M; Lee, M K; Lee, T; Leitch, M J; Leite, M A L; Lenzi, B; Li, X; Li, X H; Lim, H; Lika, T; Litvinenko, A; Liu, M X; Love, B; Lynch, D; Maguire, C F; Makdisi, Y I; Malakhov, A; Malik, M D; Manko, V I; Mao, Y; Maek, L; Masui, H; Matathias, F; McCain, M C; McCumber, M; McGaughey, P L; Miake, Y; Mike, P; Miki, K; Miller, T E; Milov, A; Mioduszewski, S; Mishra, G C; Mishra, M; Mitchell, J T; Mitrovski, M; Morreale, A; Morrison, D P; Moss, J M; Moukhanova, T V; Mukhopadhyay, D; Murata, J; Nagamiya, S; Nagata, Y; Nagle, J L; Naglis, M; Nakagawa, I; Nakamiya, Y; Nakamura, T; Nakano, K; Newby, J; Nguyen, M; Norman, B E; Nouicer, R; Nyanin, A S; Nystrand, J; O'Brien, E; Oda, S X; Ogilvie, C A; Ohnishi, H; Ojha, I D; Oka, M; Okada, K; Omiwade, O O; Oskarsson, A; Otterlund, I; Ouchida, M; Ozawa, K; Pak, R; Pal, D; Palounek, A P T; Pantuev, V; Papavassiliou, V; Park, J; Park, W J; Pate, S F; Pei, H; Peng, J -C; Pereira, H; Peresedov, V; Peressounko, D Yu; Pinkenburg, C; Pisani, R P; Purschke, M L; Purwar, A K; Qu, H; Rak, J; Rakotozafindrabe, A; Ravinovich, I; Read, K F; Rembeczki, S; Reuter, M; Reygers, K; Riabov, V; Riabov, Y; Roche, G; Romana, A; Rosati, M; Rosendahl, S S E; Rosnet, P; Rukoyatkin, P; Rykov, V L; Ryu, S S; Sahlmueller, B; Saito, N; Sakaguchi, T; Sakai, S; Sakata, H; Samsonov, V; Sato, H D; Sato, S; Sawada, S; Seele, J; Seidl, R; Semenov, V; Seto, R; Sharma, D; Shea, T K; Shein, I; Shevel, A; Shibata, T -A; Shigaki, K; Shimomura, M; Shohjoh, T; Shoji, K; Sickles, A; Silva, C L; Silvermyr, D; Silvestre, C; Sim, K S; Singh, C P; Singh, V; Skutnik, S; Slune?ka, M; Smith, W C; Soldatov, A; Soltz, R A; Sondheim, W E; Sorensen, S P; Sourikova, I V; Staley, F; Stankus, P W; Stenlund, E; Stepanov, M; Ster, A; Stoll, S P; Sugitate, T; Suire, C; Sullivan, J P; Sziklai, J; Tabaru, T; Takagi, S; Takagui, E M; Taketani, A; Tanaka, K H; Tanaka, Y; Tanida, K; Tannenbaum, M J; Taranenko, A; Tarjn, P; Thomas, T L; Todoroki, T; Togawa, M; Toia, A; Tojo, J; Tomek, L; Torii, H; Towell, R S; Tram, V-N; Tserruya, I; Tsuchimoto, Y; Tuli, S K; Tydesj, H; Tyurin, N; Vale, C; Valle, H; van Hecke, H W; Velkovska, J; Vrtesi, R; Vinogradov, A A; Virius, M; Vrba, V; Vznuzdaev, E; Wagner, M; Walker, D; Wang, X R; Watanabe, Y; Wessels, J

2014-01-01T23:59:59.000Z

205

Effects of Cu Diffusion from ZnTe:Cu/Ti Contacts on Carrier Lifetime of CdS/CdTe Thin Film Solar Cells: Preprint  

SciTech Connect (OSTI)

We study the performance of CdS/CdTe thin film PV devices processed with a ZnTe:Cu/Ti contact to investigate how carrier lifetime in the CdTe layer is affected by Cu diffusion from the contact.

Gessert, T. A.; Metzger, W. K.; Asher, S. E.; Young, M. R.; Johnston, S.; Dhere, R. G.; Duda, A.

2008-05-01T23:59:59.000Z

206

Multiexciton Solar Cells of CuInSe2 Nanocrystals  

Science Journals Connector (OSTI)

Multiexciton Solar Cells of CuInSe2 Nanocrystals ... nanocrystals; photovoltaics; CIGS; multiple excitons; solar cells; photonic curing ... (4-8) Extraction of more than one electron per absorbed photon as electrical current in devices has also been reported,(9-12) with a few instances of device quantum efficiencies (QEs) exceeding 100%, PbS (internal QE only),(13) PbSe (external QE, EQE)(14) nanocrystal solar cells, and an organic device exhibiting a related process of singlet fission. ...

C. Jackson Stolle; Taylor B. Harvey; Douglas R. Pernik; Jarett I. Hibbert; Jiang Du; Dong Joon Rhee; Vahid A. Akhavan; Richard D. Schaller; Brian A. Korgel

2013-12-26T23:59:59.000Z

207

CuC1 thermochemical cycle for hydrogen production  

DOE Patents [OSTI]

An electrochemical cell for producing copper having a dense graphite anode electrode and a dense graphite cathode electrode disposed in a CuCl solution. An anion exchange membrane made of poly(ethylene vinyl alcohol) and polyethylenimine cross-linked with a cross-linking agent selected from the group consisting of acetone, formaldehyde, glyoxal, glutaraldehyde, and mixtures thereof is disposed between the two electrodes.

Fan, Qinbai (Chicago, IL); Liu, Renxuan (Chicago, IL)

2012-01-03T23:59:59.000Z

208

Precipitation in 9Ni-12Cr-2Cu maraging steels  

SciTech Connect (OSTI)

Two maraging steels with the compositions 9Ni-12Cr-2Cu-4Mo (wt%) and 9Ni-12Cr-2Cu and with small additions of Al and Ti were investigated using atom probe field ion microscopy. Tomographic atom probe investigations were performed to clarify the spatial distribution of elements in and close to the precipitates. Materials heat treated at 475 C for 5, 25 min, 1, 2, 4 and 400 h were analyzed. Precipitates in the Mo-rich material were observed already after 5 min of aging, while in the material without MO, precipitation started later. In both materials precipitation begins with the formation of Cu-rich particles which work as nucleation sites for a Ni-rich phase of type Ni{sub 3}(Ti,Al). A Mo-rich phase was detected in the Mo-rich steel after 2 h of aging. The distribution of alloying elements in the precipitates, their role in the precipitation process, and the mechanism of hardening in the two materials are discussed.

Stiller, K.; Haettestrand, M. [Chalmers Univ. of Technology, Goeteborg (Sweden). Dept. of Physics] [Chalmers Univ. of Technology, Goeteborg (Sweden). Dept. of Physics; Danoix, F. [Univ. de Rouen, Mont Saint Aignan (France). Lab. de Microscopie Ionique] [Univ. de Rouen, Mont Saint Aignan (France). Lab. de Microscopie Ionique

1998-11-02T23:59:59.000Z

209

Synthesis of BiPbSrCaCuO superconductor  

DOE Patents [OSTI]

A process and a precursor composition for preparing a lead-doped bismuth-strontium-calcium-copper oxide superconductor of the formula Bi.sub.a Pb.sub.b Sr.sub.c Ca.sub.d Cu.sub.e O.sub.f wherein a is from about 1.7 to about 1.9, b is from about 0.3 to about 0.45, c is from about 1.6 to about 2.2, d is from about 1.6 to about 2.2, e is from about 2.97 to about 3.2 and f is 10.+-.z by reacting a mixture of Bi.sub.4 Sr.sub.3 Ca.sub.3 Cu.sub.4 O.sub.16.+-.z, an alkaline earth metal cuprate, e.g., Sr.sub.9 Ca.sub.5 Cu.sub.24 O.sub.41, and an alkaline earth metal plumbate, e.g., Ca.sub.2-x Sr.sub.x PbO.sub.4 wherein x is about 0.5, is disclosed.

Hults, William L. (Los Alamos, NM); Kubat-Martin, Kimberly A. (Espanola, NM); Salazar, Kenneth V. (Espanola, NM); Phillips, David S. (Los Alamos, NM); Peterson, Dean E. (Los Alamos, NM)

1994-01-01T23:59:59.000Z

210

Synthesis of BiPbSrCaCuO superconductor  

DOE Patents [OSTI]

A process and a precursor composition for preparing a lead-doped bismuth-strontium-calcium-copper oxide superconductor of the formula Bi[sub a]Pb[sub b]Sr[sub c]Ca[sub d]Cu[sub e]O[sub f] wherein a is from about 1.7 to about 1.9, b is from about 0.3 to about 0.45, c is from about 1.6 to about 2.2, d is from about 1.6 to about 2.2, e is from about 2.97 to about 3.2 and f is 10[+-]z by reacting a mixture of Bi[sub 4]Sr[sub 3]Ca[sub 3]Cu[sub 4]O[sub 16[+-]z], an alkaline earth metal cuprate, e.g., Sr[sub 9]Ca[sub 5]Cu[sub 24]O[sub 41], and an alkaline earth metal plumbate, e.g., Ca[sub 2[minus]x]Sr[sub x]PbO[sub 4] wherein x is about 0.5, is disclosed.

Hults, W.L.; Kubat-Martin, K.A.; Salazar, K.V.; Phillips, D.S.; Peterson, D.E.

1994-04-05T23:59:59.000Z

211

Determination of Mass Attenuation Coefficients for CuInSe2 and CuGaSe2 Semiconductors  

SciTech Connect (OSTI)

This work presents mass attenuation coefficients values of CuInSe2 and CuGaSe2 semiconductor thin films commonly used in photovoltaic devices. The mass attenuation coefficients were measured at different energies from 11.9 to 37.3 keV by using the secondary excitation method. Monochromatic photons were obtained using the Br, Sr, Mo, Cd, Te, Ba and Nd secondary targets. 59.5 keV gamma rays emitted from an annular Am-241 radioactive source were used to excite secondary targets. Characteristic X-rays emitted from secondary target were counted by a Si(Li) detector with a resolution of 0.16 keV at 5.9 keV. The measured values were compared with theoretical values calculated using WinXCOM program.

Celik, Ahmet; Cevik, Ugur; Baltas, Hasan; Bacaksiz, Emin [Department of Physics, Faculty of Arts and Sciences, Karadeniz Technical University, 61080 Trabzon (Turkey)

2007-04-23T23:59:59.000Z

212

Systematic Study of Azimuthal Anisotropy in Cu$+$Cu and Au$+$Au Collisions at $\\sqrt{s_{_{NN}}} = 62.4$ and 200~GeV  

E-Print Network [OSTI]

We have studied the dependence of azimuthal anisotropy $v_2$ for inclusive and identified charged hadrons in Au$+$Au and Cu$+$Cu collisions on collision energy, species, and centrality. The values of $v_2$ as a function of transverse momentum $p_T$ and centrality in Au$+$Au collisions at $\\sqrt{s_{_{NN}}}$=200~GeV and 62.4~GeV are the same within uncertainties. However, in Cu$+$Cu collisions we observe a decrease in $v_2$ values as the collision energy is reduced from 200 to 62.4~GeV. The decrease is larger in the more peripheral collisions. By examining both Au$+$Au and Cu$+$Cu collisions we find that $v_2$ depends both on eccentricity and the number of participants, $N_{\\rm part}$. We observe that $v_2$ divided by eccentricity ($\\varepsilon$) monotonically increases with $N_{\\rm part}$ and scales as ${N_{\\rm part}^{1/3}}$. The Cu$+$Cu data at 62.4 GeV falls below the other scaled $v_{2}$ data. For identified hadrons, $v_2$ divided by the number of constituent quarks $n_q$ is independent of hadron species as a function of transverse kinetic energy $KE_T=m_T-m$ between $0.1Cu$+$Cu data at 62.4 GeV, of $v_2/(n_q\\cdot\\varepsilon\\cdot N^{1/3}_{\\rm part})$ vs $KE_T/n_q$ for all measured particles.

A. Adare; S. Afanasiev; C. Aidala; N. N. Ajitanand; Y. Akiba; H. Al-Bataineh; A. Al-Jamel; J. Alexander; K. Aoki; L. Aphecetche; R. Armendariz; S. H. Aronson; J. Asai; E. T. Atomssa; R. Averbeck; T. C. Awes; B. Azmoun; V. Babintsev; G. Baksay; L. Baksay; A. Baldisseri; K. N. Barish; P. D. Barnes; B. Bassalleck; S. Bathe; S. Batsouli; V. Baublis; F. Bauer; A. Bazilevsky; S. Belikov; R. Bennett; Y. Berdnikov; A. A. Bickley; M. T. Bjorndal; J. G. Boissevain; H. Borel; K. Boyle; M. L. Brooks; D. S. Brown; D. Bucher; H. Buesching; V. Bumazhnov; G. Bunce; J. M. Burward-Hoy; S. Butsyk; S. Campbell; J. -S. Chai; B. S. Chang; J. -L. Charvet; S. Chernichenko; C. Y. Chi; J. Chiba; M. Chiu; I. J. Choi; T. Chujo; P. Chung; A. Churyn; V. Cianciolo; C. R. Cleven; Y. Cobigo; B. A. Cole; M. P. Comets; P. Constantin; M. Csand; T. Csrg?; T. Dahms; K. Das; G. David; M. B. Deaton; K. Dehmelt; H. Delagrange; A. Denisov; D. d'Enterria; A. Deshpande; E. J. Desmond; O. Dietzsch; A. Dion; M. Donadelli; J. L. Drachenberg; O. Drapier; A. Drees; A. K. Dubey; A. Durum; V. Dzhordzhadze; Y. V. Efremenko; J. Egdemir; F. Ellinghaus; W. S. Emam; A. Enokizono; H. En'yo; B. Espagnon; S. Esumi; K. O. Eyser; D. E. Fields; M. Finger; M. Finger; \\, Jr.; F. Fleuret; S. L. Fokin; B. Forestier; Z. Fraenkel; J. E. Frantz; A. Franz; A. D. Frawley; K. Fujiwara; Y. Fukao; S. -Y. Fung; T. Fusayasu; S. Gadrat; I. Garishvili; F. Gastineau; M. Germain; A. Glenn; H. Gong; M. Gonin; J. Gosset; Y. Goto; R. Granier de Cassagnac; N. Grau; S. V. Greene; M. Grosse Perdekamp; T. Gunji; H. -. Gustafsson; T. Hachiya; A. Hadj Henni; C. Haegemann; J. S. Haggerty; M. N. Hagiwara; H. Hamagaki; R. Han; H. Harada; E. P. Hartouni; K. Haruna; M. Harvey; E. Haslum; K. Hasuko; R. Hayano; X. He; M. Heffner; T. K. Hemmick; T. Hester; J. M. Heuser; H. Hiejima; J. C. Hill; R. Hobbs; M. Hohlmann; M. Holmes; W. Holzmann; K. Homma; B. Hong; T. Horaguchi; D. Hornback; S. Huang; M. G. Hur; T. Ichihara; H. Iinuma; K. Imai; M. Inaba; Y. Inoue; D. Isenhower; L. Isenhower; M. Ishihara; T. Isobe; M. Issah; A. Isupov; B. V. Jacak; J. Jia; J. Jin; O. Jinnouchi; B. M. Johnson; K. S. Joo; D. Jouan; F. Kajihara; S. Kametani; N. Kamihara; J. Kamin; M. Kaneta; J. H. Kang; H. Kanou; T. Kawagishi; D. Kawall; A. V. Kazantsev; S. Kelly; A. Khanzadeev; J. Kikuchi; D. H. Kim; D. J. Kim; E. Kim; Y. -S. Kim; E. Kinney; . Kiss; E. Kistenev; A. Kiyomichi; J. Klay; C. Klein-Boesing; L. Kochenda; V. Kochetkov; B. Komkov; M. Konno; D. Kotchetkov; A. Kozlov; A. Krl; A. Kravitz; P. J. Kroon; J. Kubart; G. J. Kunde; N. Kurihara; K. Kurita; M. J. Kweon; Y. Kwon; G. S. Kyle; R. Lacey; Y. S. Lai; J. G. Lajoie; A. Lebedev; Y. Le Bornec; S. Leckey; D. M. Lee; M. K. Lee; T. Lee; M. J. Leitch; M. A. L. Leite; B. Lenzi; X. Li; X. H. Li; H. Lim; T. Lika; A. Litvinenko; M. X. Liu; B. Love; D. Lynch; C. F. Maguire; Y. I. Makdisi; A. Malakhov; M. D. Malik; V. I. Manko; Y. Mao; L. Maek; H. Masui; F. Matathias; M. C. McCain; M. McCumber; P. L. McGaughey; Y. Miake; P. Mike; K. Miki; T. E. Miller; A. Milov; S. Mioduszewski; G. C. Mishra; M. Mishra; J. T. Mitchell; M. Mitrovski; A. Morreale; D. P. Morrison; J. M. Moss; T. V. Moukhanova; D. Mukhopadhyay; J. Murata; S. Nagamiya; Y. Nagata; J. L. Nagle; M. Naglis; I. Nakagawa; Y. Nakamiya; T. Nakamura; K. Nakano; J. Newby; M. Nguyen; B. E. Norman; R. Nouicer; A. S. Nyanin; J. Nystrand; E. O'Brien; S. X. Oda; C. A. Ogilvie; H. Ohnishi; I. D. Ojha; M. Oka; K. Okada; O. O. Omiwade; A. Oskarsson; I. Otterlund; M. Ouchida; K. Ozawa; R. Pak; D. Pal; A. P. T. Palounek; V. Pantuev; V. Papavassiliou; J. Park; W. J. Park; S. F. Pate; H. Pei; J. -C. Peng; H. Pereira; V. Peresedov; D. Yu. Peressounko; C. Pinkenburg; R. P. Pisani; M. L. Purschke; A. K. Purwar; H. Qu; J. Rak; A. Rakotozafindrabe; I. Ravinovich; K. F. Read; S. Rembeczki; M. Reuter; K. Reygers; V. Riabov; Y. Riabov; G. Roche; A. Romana; M. Rosati; S. S. E. Rosendahl; P. Rosnet; P. Rukoyatkin; V. L. Rykov; S. S. Ryu; B. Sahlmueller; N. Saito; T. Sakaguchi; S. Sakai; H. Sakata; V. Samsonov; H. D. Sato; S. Sato; S. Sawada; J. Seele; R. Seidl; V. Semenov; R. Seto; D. Sharma; T. K. Shea; I. Shein; A. Shevel; T. -A. Shibata; K. Shigaki; M. Shimomura; T. Shohjoh; K. Shoji; A. Sickles; C. L. Silva; D. Silvermyr; C. Silvestre; K. S. Sim; C. P. Singh; V. Singh; S. Skutnik; M. Slune?ka; W. C. Smith; A. Soldatov; R. A. Soltz; W. E. Sondheim; S. P. Sorensen; I. V. Sourikova; F. Staley; P. W. Stankus; E. Stenlund; M. Stepanov; A. Ster; S. P. Stoll; T. Sugitate; C. Suire; J. P. Sullivan; J. Sziklai; T. Tabaru; S. Takagi; E. M. Takagui; A. Taketani; K. H. Tanaka; Y. Tanaka; K. Tanida; M. J. Tannenbaum; A. Taranenko; P. Tarjn; T. L. Thomas; T. Todoroki; M. Togawa; A. Toia; J. Tojo; L. Tomek; H. Torii; R. S. Towell; V-N. Tram; I. Tserruya; Y. Tsuchimoto; S. K. Tuli; H. Tydesj; N. Tyurin; C. Vale; H. Valle

2014-12-02T23:59:59.000Z

213

Control of Y2BaCuO5 particle formation in bulk, single grain YBaCuO  

Science Journals Connector (OSTI)

The trapped field of undoped, bulk, single grain YBaCuO (YBCO) fabricated by top seeded melt growth (TSMG) has been measured to investigate the field generating potential of this material. Bulk samples were prepared from precursor powders that incorporated Y2O3 of particle size 2050nm, rather than Y2BaCuO5 (Y-211), which is used more commonly, in order to introduce nano-Y-211 inclusions in the superconducting YBa2Cu3Oy (Y-123) matrix. Relatively small bulk samples of diameter 20mm processed from this precursor are observed to trap a peak magnetic flux density of nearly 0.8T at 77K. This is the first time that such a trapped field of this magnitude has been observed in undoped YBCO (i.e.in the absence of chemical additions). The increase in trapped field is accompanied by an associated enhancement in Jc by up to a factor of five over the applied magnetic field up to 4T at 77K compared to standard single grain YBCO fabricated from precursor powders that contain the Y-211 phase.

W K Yeoh; S K Pathak; Y-H Shi; A R Dennis; D A Cardwell; N Hari Babu; K Iida; M Strasik

2009-01-01T23:59:59.000Z

214

Intrinsic surface band bending in Cu{sub 3}N(100) ultrathin films  

SciTech Connect (OSTI)

Highly homogeneous, ultrathin films of copper nitride (Cu{sub 3}N) have been grown on Fe(001) at room temperature using a Cu evaporator and a radio-frequency plasma source to obtain atomic nitrogen in a UHV environment. Cu{sub 3}N is a semiconductor with the valence band edge at -0.65{+-}0.05 eV below the Fermi Level. The formation of copper nitride can be detected spectroscopically by the shape of the Cu LVV-Auger electron transition, which changes sensibly in shape and position compared to metallic Cu. Cu{sub 3}N grows epitaxially with the substrate forming flat disklike mosaic blocks (001) oriented. Both x-ray core level photoelectron spectroscopy and ultraviolet photoelectron spectroscopy photoemission experiments have been used to study the electronic structure. A first-principles calculation has been performed and compared with the measured spectra.

Navio, C.; Alvarez, J.; Yndurain, F.; Miranda, R. [Departamento de Fisica de la Materia Condensada e Instituto de Ciencia de Materiales Nicolas Cabrera, Universidad Autonoma de Madrid, Cantoblanco, 28049 Madrid (Spain); Capitan, M. J. [Instituto de Estructura de la Materia-CSIC, c/Serrano 119, 28006 Madrid (Spain)

2007-08-15T23:59:59.000Z

215

Enhanced performance of high temperature aluminate cementitious materials incorporated with Cu powders for thermal energy storage  

Science Journals Connector (OSTI)

Abstract Cementitious materials have been extensively developed in thermal energy storage system of solar thermal power. This paper deals with the volume heat capacity, thermal conductivity, thermal expansion coefficient, and compressive strength of aluminate cementitious thermal energy storage materials with the addition of metal Cu powders. The specimens were subjected to heat-treatment at 105, 350, and 900C, respectively. In the heating process, Cu powders gradually oxidized to Cu2O and CuO, providing a so-called mass compensation mechanism for the composite paste. Meanwhile, it indicates that volume heat capacity and thermal conductivity both increase with increasing Cu powders content and decrease with the rising temperature. The optimum thermal properties were obtained at 15wt% Cu powders loading. In addition, Calorimetric Test, XRD, TGDSC, and MIP are performed for characterizing the hydration rates, the phases, the mass/heat evolution, and the pore distribution, respectively.

Huiwen Yuan; Yu Shi; Chunhua Lu; Zhongzi Xu; Yaru Ni; Xianghui Lan

2015-01-01T23:59:59.000Z

216

Method of fabricating high-efficiency Cu(In,Ga)(SeS).sub.2 thin films for solar cells  

DOE Patents [OSTI]

A process for producing a slightly Cu-poor thin film of Cu(In,Ga)(Se,S).sub.2 comprises depositing a first layer of (In,Ga).sub.x (Se,S).sub.y followed by depositing just enough Cu+(Se,S) or Cu.sub.x (Se,S) to produce the desired slightly Cu-poor material. In a variation, most, but not all, (about 90 to 99%) of the (In,Ga).sub.x (Se,S).sub.y is deposited first, followed by deposition of all the Cu+(Se,S) or Cu.sub.x (Se,S) to go near stoichiometric, possibly or even preferably slightly Cu-rich, and then in turn followed by deposition of the remainder (about 1 to 10%) of the (In,Ga).sub.x (Se,S).sub.y to end with a slightly Cu-poor composition. In yet another variation, a small portion (about 1 to 10%) of the (In,Ga).sub.x (Se,S).sub.y is first deposited as a seed layer, followed by deposition of all of the Cu+(Se,S) or Cu.sub.x (Se,S) to make a very Cu-rich mixture, and then followed deposition of the remainder of the (In,Ga).sub.x (Se,S).sub.y to go slightly Cu-poor in the final Cu(In,Ga)(Se,S).sub.2 thin film.

Noufi, Rommel (Golden, CO); Gabor, Andrew M. (Boulder, CO); Tuttle, John R. (Denver, CO); Tennant, Andrew L. (Denver, CO); Contreras, Miguel A. (Golden, CO); Albin, David S. (Denver, CO); Carapella, Jeffrey J. (Evergreen, CO)

1995-01-01T23:59:59.000Z

217

Cu/Zn-based catalysts improved by adding magnesium for watergas shift reaction  

Science Journals Connector (OSTI)

Ternary Cu/MeO/ZnO (Me: alkaline-earth metal, Mg, Ca, Sr and Ba) catalysts were prepared by homogeneous precipitation (hp) using urea hydrolysis. The structure and the activity for the watergas shift reaction of these catalysts were studied compared with those of the catalysts prepared by coprecipitation (cp). The highest activity was obtained over hp-Cu/MgO/ZnO among the catalysts tested. The catalyst precursors after the precipitation contained mainly aurichalcite, (Cu,Zn)5(CO3)2(OH)16, while the decomposed products after the calcination contained apparently CuO and ZnO as crystalline phases, since the amount of Mg actually included in the catalyst was less than 1.0at.%. The Cu metal surface area was larger and the particle size of Cu metal was smaller on the hp-catalysts than those on the cp-catalysts; nonetheless the BET surface area was sometimes larger on the latter than on the former. The addition of ?0.1at.% of Mg was the most effective, resulting in the highest activity as well as the lowest activation energy. A good correlation was observed between the amount of Cu+ species and the activation energy of the shift reaction, suggesting that MgO significantly enhanced the formation of Cu+ species as the active sites. Even after the pre-reduction at the high temperature, 250C, hp-Cu/MgO/ZnO catalyst showed no significant decrease in the activity as well as no detectable sintering in the Cu metal particles during 50h of the reaction. It was supposed that the shift reaction proceeds by a reductionoxidation mechanism between Cu0?Cu+.

Tetsuya Shishido; Manabu Yamamoto; Ikuo Atake; Dalin Li; Yan Tian; Hiroyuki Morioka; Masahide Honda; Tsuneji Sano; Katsuomi Takehira

2006-01-01T23:59:59.000Z

218

Methanol synthesis from CO2 over Cu/ZnO catalysts prepared from various coprecipitated precursors  

Science Journals Connector (OSTI)

Various precursors of Cu/ZnO catalysts were prepared by coprecipitation methods. By varying the conditions of coprecipitation, precursors having different structures (aurichalcite, malachite, hydrozincite, or their mixture) were obtained at given Cu/Zn ratios, ranging from 30/70 to 70/30. In a wide range of the Cu/Zn ratios, the catalysts derived from the precursors containing aurichalcite exhibited high performance in the methanol synthesis from CO2.

Shin-ichiro Fujita; Yoshinori Kanamori; Agus Muhamad Satriyo; Nobutsune Takezawa

1998-01-01T23:59:59.000Z

219

BOSONS IN QUANTUM MAGNETS PURE COMPOUND IPA-CuCl3  

E-Print Network [OSTI]

BOSONS IN QUANTUM MAGNETS PURE COMPOUND IPA-CuCl3 BOSE GLASS PHASE DISCUSSION #12;Matsubara in the specific heat J 50K J 5K M. Jaime et al., PRL (2004),Bilayer geometry + 3D frustration... #12;PURE IPA ON COUPLINGS J WEAK FERRO J1 #12;PURE IPA-CuCl3 [(CH3)2CHNH3CuCl3] Gap Soft mode E(k)=c*k #12;BEC Order

Paris-Sud 11, Université de

220

Trapping of Implanted He at Cu/Nb Interfaces Measured by Neutron Reflectometry  

SciTech Connect (OSTI)

In single crystalline metals, He is insoluble and precipitates into bubbles. In contrast, Cu-Nb multilayers show no evidence of bubble formation below a critical concentration. The conclusions of this paper are: (1) He is trapped at Cu/Nb , Cu/Mo interfaces; (2) He is trapped interstitially; (3) The interface swells {approx} 10 times; and (4) The layered structure retains despite the swell of interfaces.

Wang, Peng [Los Alamos National Laboratory; Zhernenkov, Mikhail [Applications Scientist at Nanometrics; Kashinath, Abishek [MIT; Demkowicz, Michael [MIT; Baldwin, Jon K. [Los Alamos National Laboratory; Majewski, Jaroslaw [Los Alamos National Laboratory

2012-06-20T23:59:59.000Z

Note: This page contains sample records for the topic "bermuda cu cuba" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Microscopic structure, discommensurations, and tiling of Si(111)/Cu-55  

Science Journals Connector (OSTI)

We derive a detailed, microscopic description of the Si(111)/Cu-55 reconstruction. The key to understanding this structure is the x-ray standing-wave determination of the Cu registry with respect to the Si substrate. With Cu basically in H3 and substitutional sites the buckled Si(111) surface bilayer converts to an almost planar, hexagonal Cu2Si layer. The straightened bond angles and the associated increase in the lateral lattice constant give rise to a hexagonal network of discommensurations of period ?5.5aSi. Complete tiling of the surface requires three types of twisted (3) domains, two of which are rotationally equivalent.

J. Zegenhagen; E. Fontes; F. Grey; J. R. Patel

1992-07-15T23:59:59.000Z

222

Sulfur Effect and Performance Recovery of a DOC + CSF + Cu-Zeolite...  

Broader source: Energy.gov (indexed) [DOE]

October 04, 2011 Sulfur Effect and Performance Recovery of a DOC + CSF + Cu-Zeolite SCR System DEER CONFERENCE 2011 Outline Introduction Zeolite-based SCR behavior -...

223

NMR Studies of Cu/zeolite SCR Catalysts Hydrothermally Aged with...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Cuzeolite SCR Catalysts Hydrothermally Aged with Urea. NMR Studies of Cuzeolite SCR Catalysts Hydrothermally Aged with Urea. Abstract: The effects of hydrothermal aging of Cu...

224

Smectic Vortex Phase in Optimally Doped YBa2Cu3O7 Thin Films...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

can lead to magnetoelectric effects. These are single crystals that incorporate magnetic transition- metal ions such as Cu or Ni in an insulating organic matrix. * Measurements in...

225

Investigation of Chemical Looping Combustion of Coal with CuFe2O4 Oxygen Carrier  

Science Journals Connector (OSTI)

Investigation of Chemical Looping Combustion of Coal with CuFe2O4 Oxygen Carrier ... Industrial & Engineering Chemistry Research2013 52 (5), 1795-1805 ...

Baowen Wang; Rong Yan; Haibo Zhao; Ying Zheng; Zhaohui Liu; Chuguang Zheng

2011-06-15T23:59:59.000Z

226

E-Print Network 3.0 - av zn cu Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

to promote efficiency of CuZnOAl2O3 catalysts, producing hydrogen with low carbon monoxide levels 13 Source: Mukasyan, Alexander - Department of Chemical and Biomolecular...

227

Deactivation Mechanism of Cu/Zeolite SCR Catalyst Due to Reductive Hydrothermal Aging  

Broader source: Energy.gov [DOE]

Better control for preventing catalyst deactivation resulted from study of and proposed mechanism for deactivation of Cu/zeolite under rich conditions.

228

Temporal stability of Y Ba Cu O nano Josephson junctions from ion irradiation  

E-Print Network [OSTI]

planar high temperature Josephson junctions fabricated usingYBa 2 Cu 3 O 7-? Josephson junctions via nanolithography andsuperconductor Josephson junctions, J. Vac. Sci. Technol.

Cybart, Shane A.

2014-01-01T23:59:59.000Z

229

Structure, Magnetism, and Transport of CuCr2Se4 Thin Films  

E-Print Network [OSTI]

to the surface. Electronic structure calculations indicatealso present electronic structure calculations for CuCr 2 Sewith the electronic structure calculations. 1. Introduction

2008-01-01T23:59:59.000Z

230

Growth and microstructure of MTG REBa2Cu3O7/RE?2BaCuO5 with heavy rare earth elements  

Science Journals Connector (OSTI)

New melt textured REBa2Cu3O7/RE?2BaCuO5 composites, have been obtained by top seeding melt-texturing growth. Two different starting mixtures of \\{REBa2Cu3O7\\} superconducting powders and insulating \\{Y2BaCuO5\\} phase were used. On one hand RE is a natural mixture of heavy rare earth elements (Y, Yb, Lu, Er, Dy, Tm, Ho) extracted from the Brazilian mineral Xenotime, and on the other hand, RE is thulium. In both cases melt textured REBa2Cu3O7/RE?2BaCuO5 composites have been obtained where RE and RE? are different mixtures of heavy rare earth/yttrium and Tm/yttrium. The composition analysis shows different areas within the RE?2BaCuO5 as a consequence of an inhomogeneous RE distribution, due to the differential solubility of each rare earth in the high temperature semisolid state. During the crystallization process a profound inversion of the rare earth composition between the superconducting matrix and the insulating precipitates occurs. Yttrium is selectively located in the 123 matrix and RE in the 211 particles. Heavy RE ions can substitute yttrium in MTG REBCO without degradation of the superconducting properties. A model for the crystallization process is proposed.

A.E. Carrillo; P. Rodr??guez Jr.; T. Puig; A. Palau; X. Obradors; H. Zheng; U. Welp; L. Chen; B.W. Veal; H. Claus; G.W. Crabtree

2002-01-01T23:59:59.000Z

231

Effect of thermally stable Cu- and Mg-rich aluminides on the high temperature strength of an AlSi12CuMgNi alloy  

SciTech Connect (OSTI)

The internal architecture of an AlSi12CuMgNi piston alloy, revealed by synchrotron tomography, consists of three dimensional interconnected hybrid networks of Cu-rich aluminides, Mg-rich aluminides and eutectic/primary Si embedded in an ?-Al matrix. The strength at room temperature and at 300C is studied as a function of solution treatment time at 490C and compared with results previously reported for an AlSi12Ni alloy. The addition of 1 wt% Cu and 1 wt% Mg to AlSi12CuMgNi increases the room temperature strength by precipitation hardening while the strength at 300C is similar for both alloys in as-cast condition. The strength of AlSi12CuMgNi decreases with solution treatment time and stabilizes at 4 h solution treatment. The effect of solution treatment time on the strength of the AlSi12CuMgNi alloy is less pronounced than for the AlSi12Ni alloy both at room temperature and at 300C. - Highlights: The 3D microstructure of AlSi12CuMgNi is revealed by synchrotron tomography. An imaging analysis procedure to segment phases with similar contrasts is presented. 1 wt% Cu and Mg results in the formation of 3D networks of rigid phases. AlSi12CuMgNi is stronger than AlSi12Ni owing to the stability of the 3D networks.

Asghar, Z., E-mail: zhdasghar@yahoo.com [Materials Division, Directorate of Technology, PINSTECH, P. O. Nilore, Islamabad (Pakistan); Vienna University of Technology, Institute of Materials Science and Technology, Karlsplatz 13/308, A-1040 Vienna (Austria); Requena, G. [Vienna University of Technology, Institute of Materials Science and Technology, Karlsplatz 13/308, A-1040 Vienna (Austria); Zahid, G.H.; Rafi-ud-Din [Materials Division, Directorate of Technology, PINSTECH, P. O. Nilore, Islamabad (Pakistan)

2014-02-15T23:59:59.000Z

232

Comparison of bulk R2-zCezCuO4 with superlattice R2-zCezCuO4/SrO/NbO2/SrO/CuO2  

Science Journals Connector (OSTI)

Bulk R2-zCezCuO4 compounds superconduct for trivalent ions R=Pr, Nd, Sm, and Eu, but not for Gd or for Cm (with Th replacing Ce). R2-zCezSr2Cu2NbO10 is a natural superlattice of R2-zCezCuO4 and the layers SrO/NbO2/SrO/CuO2; it exhibits bulk superconductivity for R=Nd, Sm, Eu, and Gd, but not for R=Pr. These differences imply that the superconducting regions in the bulk and in the superlattice must be different, and not both cuprate planes. The primary superconductivity is assigned to interstitial oxygen and Nd-O layers in the bulk and to Sr-O layers in the superlattice.

Howard A. Blackstead and John D. Dow

1999-11-01T23:59:59.000Z

233

Autocatalytic water dissociation on Cu(110) at near ambient conditions  

SciTech Connect (OSTI)

Autocatalytic dissociation of water on the Cu(110) metal surface is demonstrated based on X-ray photoelectron spectroscopy studies carried out in-situ under near ambient conditions of water vapor pressure (1 Torr) and temperature (275-520 K). The autocatalytic reaction is explained as the result of the strong hydrogen-bond in the H{sub 2}O-OH complex of the dissociated final state, which lowers the water dissociation barrier according to the Broensted-Evans-Polanyi relations. A simple chemical bonding picture is presented which predicts autocatalytic water dissociation to be a general phenomenon on metal surfaces.

Mulleregan, Alice; Andersson, Klas; Ketteler, Guido; Bluhm, Hendrik; Yamamoto, Susumu; Ogasawara, Hirohito; Pettersson, Lars G.M.; Salmeron, Miquel; Nilsson, Anders

2007-05-16T23:59:59.000Z

234

Kinetic investigations of NaF: Cu luminescence  

Science Journals Connector (OSTI)

The temperature dependence of the lifetime of Cu+ impurity ions in single-crystal sodium fluoride has been analyzed. In order to describe the emission process occurring in this system, we have proposed a three-level model including the ground state and two close excited states in thermal equilibrium. Information is deduced concerning mainly their emission probabilities and their energy differences. A calculation of the mixing of these triplet emitting levels with other excited states is in very good agreement with our experimental results.

B. Moine and C. Pedrini

1984-07-15T23:59:59.000Z

235

Electronic and atomic structure of the Cu/Si(111) quasi-55 overlayer  

Science Journals Connector (OSTI)

The quasi-55 layer formed by annealing a monolayer of Cu on a Si(111) surface has a so-called quasiperiodic structure that differs significantly from both transition-metal silicides and metal-induced reconstructions. We have therefore performed detailed angle-resolved uv photoemission (ARUPS) measurements and ab initio band-structure calculations to investigate the atomic structure of the quasi-55 layer and the unique bonding behavior it embodies. ARUPS results are dominated by two Cu 3d peaks separated by 0.7 eV. The intensity variation of these peaks with emission and incidence angles suggests an ordered planar layer, yet there is considerable inhomogeneous broadening. A Si 3pderived surface state is also observed 1.2 eV below the Fermi level. Two atomic models are considered in light of these results: a widely cited nearly planar CuSi2 model with interstitial Cu atoms and a substitutional CuSi model. In electronic-structure calculations using the pseudofunction method of Kasowski et al., the CuSi model agrees much better than the CuSi2 model with ARUPS in the energy differences between Cu 3d states, in their energies relative to the Fermi level, and in the surface-state behavior. Computed results for the CuSi model also account for features seen in current-voltage relationships in scanning tunneling microscopy, the Cu atom height measured with x-ray standing waves, the observed nonreactivity of the quasi-55 surface, and a vibrational mode at 8 meV detected using helium diffraction. The band-structure calculations show that bonding in the 55 CuSi layer is different from that of transition-metal silicides. The formation of Si pCu d bonding hybrid orbitals appears to be important in making the CuSi structure stable, but the Cu 4s orbitals also play a significant role in hybridizing with Si 3p states. It is possible that the quasi-55 layer is a two-dimensional electron phase in which domain boundaries are formed to accommodate a particular [Cu]:[Si] surface stoichiometry different from unity.

D. D. Chambliss and T. N. Rhodin

1990-07-15T23:59:59.000Z

236

CdTe-Cu(OH){sub 2} nanocomposite: Aqueous synthesis and characterization  

SciTech Connect (OSTI)

CdTe-Cu(OH){sub 2} nanocomposites were synthesized in aqueous solution by a seed-mediated growth approach. The effect of refluxing time and the concentration of Cu{sup 2+} on the preparation of these samples were measured using UV-visible absorption and photoluminescence analysis. The emission peak of the synthesized nanocomposites (CdTe-Cu(OH){sub 2}) was shifted from 605 (CdTe seed) to 621 nm. The size of CdTe nanoparticles were averaged about 3.22 nm, and the CdTe-Cu(OH){sub 2} nanocomposites were averaged as 5.19 nm. The synthesized CdTe-Cu(OH){sub 2} nanocomposite were characterized with XRD, EDAX, TEM, FT-IR, EPR, and thermal analysis (TG/DTG curves). The results indicate that as-prepared nanoparticles with core/shell structure exhibit interesting optical properties. -- Graphical Abstract: Schematic of aqueous synthesis route for CdTe-Cu(OH){sub 2} nanocomposite and The Stokes shift of CdTe nanocrystals and CdTe-Cu(OH){sub 2} Nanocomposites, (CdTe: emission at 605 nm, CdTe-Cu(OH){sub 2}: emission at 621 nm). Display Omitted Highlights: {yields} CdTe-Cu(OH){sub 2} nanocomposites were synthesized by a seed-mediated growth approach. {yields} The synthetic procedure is simple, and can be easily scaled up. {yields} The effect of refluxing time on the preparation of these samples was measured. {yields} The Cu(OH){sub 2} shell thickness was controlled by the amount of Cu in the solution. {yields} TEM images demonstrated homogeneous size distribution for these nanocomposites.

Abd El-sadek, M.S., E-mail: el_sadek_99@yahoo.co [Nanomaterial Laboratory, Physics Department, Faculty of Science, South Valley University, Qena 83523 (Egypt); Crystal Growth Centre, Anna University Chennai, Chennai 600025 (India); Moorthy Babu, S. [Crystal Growth Centre, Anna University Chennai, Chennai 600025 (India)

2011-05-15T23:59:59.000Z

237

Rotating ring-disk electrode studies of Cu-Zn alloy electrodissolution in 1M HCl: Effect of benzotriazole  

SciTech Connect (OSTI)

The electrodissolution behavior of Cu and Cu-rich Cu-Zn alloys in 1M HCl containing benzotriazole (BTA) was studied using rotating ring-disk electrodes. Cu(I) was the main product of Cu-Zn alloy dissolution with Cu(II) detected only at higher potentials. Electrodissolution of the Cu component was similar to that of copper with an apparent Tafel slope of 60 mV/dec. Cu component dissolution rates exhibited strong mass-transfer effects in the entire potential range studied. A CuCl film formed on the alloy surfaces in the current peak region. In the limiting current region the rates of Cu(I) dissolution from both alloys and copper were essentially equivalent and indicate CuCl{sup {minus}}{sub 2} as the principal diffusing species. Significant selective electrodissolution of Zn was observed in the apparent Tafel region. The formation of a duplex film was indicated in the presence of BTA with a nonporous Cu(I) BTA inner layer and a porous CuCl outer layer.

Costa, S.L.F.A. da; Nobe, K. [Univ. of California, Los Angeles, CA (United States). Dept. of Chemical Engineering; Agostinho, S.M.L. [Univ. de Sao Paulo (Brazil). Dept. de Quimica Fundamental

1993-12-01T23:59:59.000Z

238

Mineral formation from aqueous solution. Part III. The stability of aurichalcite, (Zn,Cu)5(CO3)2(OH)6, and rosasite (Cu,Zn)2(CO3)(OH)2  

Science Journals Connector (OSTI)

The stabilities of rosasite, (Cu, Zn)2 (CO3)(OH)2, and aurichalcite, (Zn, Cu)5(CO3)2(OH)6, have been determined by solution experiments with computer calculations of aqueous species in equilibrium with the solid ...

Alwan K. Alwan; J. H. Thomas; Peter A. Williams

1980-01-01T23:59:59.000Z

239

Lavinskyite, K(LiCu)Cu6(Si4O11)2(OH)4, isotypic with plancheite, a new mineral from the Wessels mine, Kalahari Manganese Fields, South Africa  

E-Print Network [OSTI]

by the undulating, brucite-like layers consisting of three distinct octahedral sites occupied mainly by Cu

Downs, Robert T.

240

J/psi production at high transverse momenta in p+p and Cu+Cu collisions at sqrt sNN = 200 GeV  

SciTech Connect (OSTI)

The STAR collaboration at RHIC presents measurements of J/{psi} {yields} e{sup +}e{sup -} at mid-rapidity and high transverse momentum (p{sub T} > 5 GeV/c) in p+p and central Cu+Cu collisions at {radical}sNN = 200 GeV. The inclusive J/{psi} production cross section for Cu+Cu collisions is found to be consistent at high p{sub T} with the binary collision-scaled cross section for p+p collisions, in contrast to previous measurements at lower p{sub T}, where a suppression of J/{psi} production is observed relative to the expectation from binary scaling. Azimuthal correlations of J/{psi} with charged hadrons in p+p collisions provide an estimate of the contribution of B-meson decays to J/{psi} production of 13% {+-} 5%.

STAR Collaboration; Abelev, B. I.

2009-10-27T23:59:59.000Z

Note: This page contains sample records for the topic "bermuda cu cuba" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Characterization of Cu-ZSM-5 Prepared by Solid-State Ion Exchange of H-ZSM-5 with CuCl  

E-Print Network [OSTI]

Cl occlusion in the zeolite pores. After SSIE, the resulting Cu-ZSM-5 was characterized by XRD, 27 Al MAS NMR and nitriles,15 the desulfurization of diesel fuel,16 and the oxidative carbony- lation of methanol to dimethyl

Bell, Alexis T.

242

Mechanism of the formation of precursors for the Cu/ZnO methanol synthesis catalysts by a coprecipitation method  

Science Journals Connector (OSTI)

Precursors of Cu/ZnO catalysts with various Cu/Zn molar ratios were prepared by a coprecipitation method. It was found that amorphous copper hydroxycarbonate and sodium zinc carbonate were intermediates for the f...

Shin-ichiro Fujita; Agus Muhamad Satriyo; Guo Cheng Shen

1995-01-01T23:59:59.000Z

243

The effect of ZnO in methanol synthesis catalysts on Cu dispersion and the specific activity  

Science Journals Connector (OSTI)

The effect of ZnO in Cu/ZnO catalysts prepared by the coprecipitation method has been studied using measurements of the surface area of Cu, the specific activity for the methanol synthesis by hydrogenation of CO2

T. Fujitani; J. Nakamura

244

Thermal decomposition of Cu-based hydroxycarbonate catalytic precursors for the low-temperature co-shift reaction  

Science Journals Connector (OSTI)

The thermal decomposition of Cu-Zn-Al hydroxycarbonate precursors to obtain water-gas shift catalysts was studied by employing a variety of experimental techniques. A set of six samples containing 34 wt% of Cu an...

M. J. L. Gins; C. R. Apestegua

1997-12-01T23:59:59.000Z

245

Muon-spin spectroscopy of the organometallic spin-1/2 kagome-lattice compound Cu(1,3-benzenedicarboxylate)  

E-Print Network [OSTI]

Using muon-spin resonance, we examine the organometallic hybrid compound Cu(1,3-benzenedicarboxylate) [Cu(1,3-bdc)], which has structurally perfect spin-1/2 copper kagome planes separated by pure organic linkers. This ...

Marcipar, Lital

246

Bi 3 + cluster primary ions in SIMS depth profiling of YBaCuO high-temperature superconductor films  

Science Journals Connector (OSTI)

SIMS depth profiling of YBa2Cu3O7 high-temperature superconductor films was performed using a TOF.SIMS-...2Cu3O7 films based on detection of cluster secondary ions.

M. N. Drozdov; Yu. N. Drozdov

2010-08-01T23:59:59.000Z

247

Ultrasound-assisted synthesis of CuO nanostructures templated by cotton fibers  

SciTech Connect (OSTI)

Highlights: ? Flower-like and corn-like CuO nanostructures were synthesized by a simple method. ? Cotton fibers purchased from commercially are used as template. ? The concentration of Cu(NO{sub 3}){sub 2} solution is an important parameter. -- Abstract: Flower-like and corn-like CuO nanostructures composed of CuO nanoparticles were successfully synthesized via ultrasound-assisted template method, respectively, by controlling the initial concentration of Cu(NO{sub 3}){sub 2} solution. Here, cotton fibers were used as template agent. The products were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), field-emission scanning electron microscopy (FE-SEM) and energy-dispersive spectroscopy (EDS), respectively. The results demonstrated that the initial concentration of Cu(NO{sub 3}){sub 2} solution was an important parameter for determining whether CuO nanoparticles assembled into flower-like structures or corn-like structures. The mechanism of forming different nanostructures of CuO was discussed.

Zou, Yunling, E-mail: zouyunling1999@126.com [College of Science, Civil Aviation University of China, Tianjin 300300 (China)] [College of Science, Civil Aviation University of China, Tianjin 300300 (China); Li, Yan; Guo, Ying; Zhou, Qingjun; An, Dongmin [College of Science, Civil Aviation University of China, Tianjin 300300 (China)] [College of Science, Civil Aviation University of China, Tianjin 300300 (China)

2012-11-15T23:59:59.000Z

248

COMMUNICATIONS Cd doping at the CuInSe2 CdS heterojunction  

E-Print Network [OSTI]

COMMUNICATIONS Cd doping at the CuInSe2 �CdS heterojunction Dongxiang Liaoa) and Angus Rockett that CIGS could be doped with Cd during chemical bath deposition CBD of CdS.6 However, Cd doping of CIGS October 2002; accepted 7 March 2003 The chemical composition of the CuInSe2 /CdS heterojunction interface

Rockett, Angus

249

Chemical bath deposition of CdS thin films doped with Zn and Cu  

Science Journals Connector (OSTI)

Zn- and Cu-doped CdS thin films were deposited onto glass substrates...2 and CuCl2...were incorporated as dopant agents into the conventional CdS chemical bath in order to promote the CdS doping process. The effe...

A I OLIVA; J E CORONA; R PATIO; A I OLIVA-AVILS

2014-04-01T23:59:59.000Z

250

Kinetic, Mechanistic, and Spectroscopic Studies of the Mo/Cu Containing CO dehydrogenase of Oligotropha carboxidovorans  

E-Print Network [OSTI]

et. al. where active site models [Tp iPr MoO(OAr)(?-S)Cu(triazacyclononane) (Tp iPr ) = hydrotris(3-isopropylpyrazol-of CO dehydrogenase: [Tp iPr Mo (V) (O)(OAr)(?-S)Cu (I) (Me

Wilcoxen, Jarett Michael

2013-01-01T23:59:59.000Z

251

Photoelectric properties of In/n-CuIn5Se8 Schottky barriers  

Science Journals Connector (OSTI)

We have grown homogeneous CuIn5Se8 crystals with n-type conductivity and determined the activation energy for the donor centers. We created In/n-CuIn5Se8 Schottky barriers and obtained the first spectral dependen...

1 I. V. Bodnar; V. Yu. Rud; Yu. V. Rud

2006-07-01T23:59:59.000Z

252

Reduction Kinetics of Cu-Based Oxygen Carriers for Chemical Looping Air Separation  

Science Journals Connector (OSTI)

Only Sahir et al. performed a rate analysis from the reported batch fluidized bed CLOU experimental data of Mexican petcoke particles by a CuO/ZrO2 oxygen carrier. ... data of Mexican petcoke particles by a CuO/ZrO2 oxygen carrier. ...

Kun Wang; Qingbo Yu; Qin Qin

2013-08-02T23:59:59.000Z

253

Diffusion of indium and gallium in Cu(In,Ga)Se2 thin film solar cells  

E-Print Network [OSTI]

Diffusion of indium and gallium in Cu(In,Ga)Se2 thin film solar cells O. Lundberga,*, J. Lua , A. Rockettb , M. Edoffa , L. Stolta a A°ngstro¨m Solar Center, Uppsala University, P.O. Box 534, SE-751 21 Abstract The diffusion of indium and gallium in polycrystalline thin film Cu(In,Ga)Se2 layers has been

Rockett, Angus

254

Glass Forming Ability in Pr-(Cu, Ni)-Al Alloys  

E-Print Network [OSTI]

Glass forming ability (GFA) in the Pr-rich Pr-(Cu, Ni)-Al alloys at or near the eutectic points was systematically studied. It was found that the GFA in the pseudo-ternary alloys of Pr-(Cu, Ni)-Al is higher than that of ...

Zhang, Yong

255

Mineral assemblages in sulfide ores; the system Cu-Fe-As-S  

Science Journals Connector (OSTI)

...6a-c) requiresthejoindomeykite-Fe. Infex red joins dom-lo Cu-lo (high temperature) dom-Fe (low temperature) C2U^tSaS^a S StE VtCu-FE-As-S There are noknownmineralscontainingall four elementsasessentialcom- ponents. The only phasesthat...

Hugh McKinstry

256

A DFT Study of Ethanol Adsorption and Dehydrogenation on Cu/Cr2O3 Catalyst  

Science Journals Connector (OSTI)

In this work, DFT simulation method was used to study the adsorption and dehydrogenation of ethanol on Cu/Cr2O3 catalyst. Firstly, the stable configuration of Cu4 cluster adsorbed on Cr2O3...(001) surface was stu...

Minhua Zhang; Yanping Huang; Ruzhen Li; Guiming Li; Yingzhe Yu

2014-11-01T23:59:59.000Z

257

E-Print Network 3.0 - aleaciones cu-zn-al estabilidad Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

C2, suppl6mentau Journal de Physique 111,Volume 5, f6vrier 1995 Summary: The shape memory alloys which are industrially used are based upon NiTi, CuZnAl and CuAlNi to which...

258

Reduction of CuO and Cu2O with H2: H Embedding and Kinetic Effects in the Formation of Suboxides  

E-Print Network [OSTI]

OH + H2O),2b,9 the water-gas shift reaction (CO + H2O w CO2 + H2),10 methanol steam reReduction of CuO and Cu2O with H2: H Embedding and Kinetic Effects in the Formation of Suboxides. These results show the importance of kinetic effects for the formation of well-defined suboxides during

Frenkel, Anatoly

259

Deposition and characterization of YBa2Cu3O7 /LaMnO3 / MgO/TiN heterostructures on Cu metal substrates for  

E-Print Network [OSTI]

-on-cube epitaxy is observed. While the Cu/TiN and TiN/MgO interfaces are rough, the MgO and LaMnO3 layers . Reduced Jc of approximately 1 MA/cm2 on rolled Cu tapes is limited by damage to the tape surface during- ity of the coatings, reliability of these conductors against thermal transients, and limitation

Pennycook, Steve

260

In Situ Characterization of CuFe2O4 and Cu/Fe3O4 Water-Gas Shift Catalysts Michael Estrella,  

E-Print Network [OSTI]

the performance of the Pt electrode in fuel cell systems. In order to get clean hydrogen for fuel cells and otherIn Situ Characterization of CuFe2O4 and Cu/Fe3O4 Water-Gas Shift Catalysts Michael Estrella, LauraVised Manuscript ReceiVed: June 19, 2009 Mixtures of copper and iron oxides are used as industrial catalysts

Frenkel, Anatoly

Note: This page contains sample records for the topic "bermuda cu cuba" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Unusual Physical and Chemical Properties of Cu in Ce1-xCuxO2 Oxides  

SciTech Connect (OSTI)

The structural and electronic properties of Ce{sub 1-x}Cu{sub x}O{sub 2} nano systems prepared by a reverse microemulsion method were characterized with synchrotron-based X-ray diffraction, X-ray absorption spectroscopy, Raman spectroscopy, and density functional calculations. The Cu atoms embedded in ceria had an oxidation state higher than those of the cations in Cu{sub 2}O or CuO. The lattice of the Ce{sub 1-x}Cu{sub x}O{sub 2} systems still adopted a fluorite-type structure, but it was highly distorted with multiple cation-oxygen distances with respect to the single cation-oxygen bond distance seen in pure ceria. The doping of CeO{sub 2} with copper introduced a large strain into the oxide lattice and favored the formation of O vacancies, leading to a Ce{sub 1-x}Cu{sub x}O{sub 2-y} stoichiometry for our materials. Cu approached the planar geometry characteristic of Cu(II) oxides, but with a strongly perturbed local order. The chemical activities of the Ce{sub 1-x}Cu{sub x}O{sub 2} nanoparticles were tested using the reactions with H2 and O2 as probes. During the reduction in hydrogen, an induction time was observed and became shorter after raising the reaction temperature. The fraction of copper that could be reduced in the Ce{sub 1-x}Cu{sub x}O{sub 2} oxides also depended strongly on the reaction temperature. A comparison with data for the reduction of pure copper oxides indicated that the copper embedded in ceria was much more difficult to reduce. The reduction of the Ce{sub 1-x}Cu{sub x}O{sub 2} nanoparticles was rather reversible, without the generation of a significant amount of CuO or Cu{sub 2}O phases during reoxidation. This reversible process demonstrates the unusual structural and chemical properties of the Cu-doped ceria materials.

Wang,X.; Rodriguez, J.; Hanson, J.; Gamarra, D.; Martinez-Arias, A.; Fernandez-Garcia, M.

2005-01-01T23:59:59.000Z

262

Evaluation of photovoltaic materials within the Cu-Sn-S family  

SciTech Connect (OSTI)

Next-generation thin film solar cell technologies require earth abundant photovoltaic absorber materials. Here we demonstrate an alternative approach to design of such materials, evaluating candidates grouped by constituent elements rather than underlying crystal structures. As an example, we evaluate thermodynamic stability, electrical transport, electronic structure, optical and defect properties of Cu-Sn-S candidates using complementary theory and experiment. We conclude that Cu{sub 2}SnS{sub 3} avoids many issues associated with the properties of Cu{sub 4}SnS{sub 4}, Cu{sub 4}Sn{sub 7}S{sub 16}, and other Cu-Sn-S materials. This example demonstrates how this element-specific approach quickly identifies potential problems with less promising candidates and helps focusing on the more promising solar cell absorbers.

Zawadzki, Pawel; Peng, Haowei; Ginley, David S.; Tumas, W.; Zakutayev, Andriy, E-mail: andriy.zakutayev@nrel.gov; Lany, Stephan, E-mail: stephan.lany@nrel.gov [National Renewable Energy Laboratory, Golden, Colorado 80401 (United States)] [National Renewable Energy Laboratory, Golden, Colorado 80401 (United States); Baranowski, Lauryn L.; Toberer, Eric S. [National Renewable Energy Laboratory, Golden, Colorado 80401 (United States) [National Renewable Energy Laboratory, Golden, Colorado 80401 (United States); Physics Department, Colorado School of Mines, Golden, Colorado 80401 (United States)

2013-12-16T23:59:59.000Z

263

Reactions of Disilane on Cu(111): Direct Observation of Competitive Dissociation, Disproportionation, and Thin Film Growth Processes  

Science Journals Connector (OSTI)

Reactions of Disilane on Cu(111): Direct Observation of Competitive Dissociation, Disproportionation, and Thin Film Growth Processes ...

Shrikant P. Lohokare; Benjamin C. Wiegand; Ralph G. Nuzzo

1995-10-01T23:59:59.000Z

264

Location of Cu2+ in CHA zeolite investigated by X-ray diffraction using the Rietveld/maximum entropy method  

Science Journals Connector (OSTI)

Rietveld/MEM analysis applied to synchrotron powder X-ray diffraction data of dehydrated CHA zeolites with catalytically active Cu2+ reveals Cu2+ in both the six- and eight-membered rings in the CHA framework, providing the first complete structural model that accounts for all Cu2+. Density functional theory calculations are used to corroborate the experimental structure and to discuss the Cu2+ coordination in terms of the Al distribution in the framework.

Andersen, C.W.

2014-09-23T23:59:59.000Z

265

Fullerene on Nitrogen-Adsorbed Cu(001) Nanopatterned Surfaces: From Preferential Nucleation to Layer-by-Layer Growth  

E-Print Network [OSTI]

Fullerene on Nitrogen-Adsorbed Cu(001) Nanopatterned Surfaces: From Preferential Nucleation, 2008 Nitrogen (N)-adsorbed Cu(001)-c(2 ? 2) nanopatterned surfaces are used as templates to guide of growth, C60 molecules preferentially adsorb on the bare Cu regions on a partially N-covered grid surface

266

De novo design and spectroscopic characterization of Cu(II)-binding peptides based upon the blue copper protein plastocyanin  

E-Print Network [OSTI]

-Cu(II) reduction potentials have been measured to be + 62 mV vs. NHE for BCP-A-Cu(II) and -11 mV vs. NHE for BCP-B-Cu(II). The observed redox potentials fit a trend observed for the blue copper proteins, as the axial interactions are increased the reduction...

Daugherty, Roxanne Gail

2002-01-01T23:59:59.000Z

267

Water-gas Shift Reaction on oxide/Cu(111): Rational Catalyst Screening from Density Functional Theory  

SciTech Connect (OSTI)

Developing improved catalysts based on a fundamental understanding of reaction mechanism has become one of the grand challenges in catalysis. A theoretical understanding and screening the metal-oxide composite catalysts for the water-gas shift (WGS) reaction is presented here. Density functional theory was employed to identify the key step for the WGS reaction on the Au, Cu-oxide catalysts, where the calculated reaction energy for water dissociation correlates well with the experimental measured WGS activity. Accordingly, the calculated reaction energy for water dissociation was used as the scaling descriptor to screen the inverse model catalysts, oxide/Cu(111), for the better WGS activity. Our calculations predict that the WGS activity increases in a sequence: Cu(111), ZnO/Cu(111) < TiO{sub 2}/Cu(111), ZrO{sub 2}/Cu(111) < MoO{sub 3}/Cu(111). Our results imply that the high performances of Au, Cu-oxide nanocatalysts in the WGS reaction rely heavily on the direct participation of both oxide and metal sites. The degree that the oxide is reduced by Cu plays an important role in determining the WGS activity of oxide/Cu catalysts. The reducible oxide can be transformed from the fully oxidized form to the reduced form due to the interaction with Cu and, therefore, the transfer of electron density from Cu, which helps in releasing the bottleneck water dissociation and, therefore, facilitating the WGS reaction on copper.

Liu, P.

2010-11-28T23:59:59.000Z

268

SnO2-CuO/graphene nanocomposites for high performance Li-ion battery anodes  

Science Journals Connector (OSTI)

The nanocomposites of SnO2-CuO/graphene are synthesized via a two-step method. ... CuO nanorods are firstly uniformly loaded on the graphene nanosheets, and then SnO2 nanoparticles are coated on CuO nanorods. SnO

Jun Zhao; WanFei Shan; XinBei Xia; Qi Wang

2014-06-01T23:59:59.000Z

269

CuGeO3 nanowires covered with graphene as anode materials of lithium ion batteries with enhanced  

E-Print Network [OSTI]

CuGeO3 nanowires covered with graphene as anode materials of lithium ion batteries with enhanced one-step route was developed to synthesize crystalline CuGeO3 nanowire/graphene composites (CGCs). Crystalline CuGeO3 nanowires were tightly covered and anchored by graphene sheets, forming a layered structure

Lin, Zhiqun

270

Using direct hot-rolling approach to obtain dual-phase weathering steel CuPCrNiMo  

Science Journals Connector (OSTI)

A weathering steel CuPCrNiMo has been ... based on the continuous cooling transformation diagram of weathering steel CuPCrNiMo. The results show that the microstructures of DP weathering steels CuPCrNi...

Chunling Zhang; Dayong Cai; Bo Liao; Yunchang Fan

2010-01-01T23:59:59.000Z

271

Enhanced quality thin film Cu(In,Ga)Se.sub.2 for semiconductor device applications by vapor-phase recrystallization  

DOE Patents [OSTI]

Enhanced quality thin films of Cu.sub.w (In,Ga.sub.y)Se.sub.z for semiconductor device applications are fabricated by initially forming a Cu-rich, phase-separated compound mixture comprising Cu(In,Ga):Cu.sub.x Se on a substrate to form a large-grain precursor and then converting the excess Cu.sub.x Se to Cu(In,Ga)Se.sub.2 by exposing it to an activity of In and/or Ga, either in vapor In and/or Ga form or in solid (In,Ga).sub.y Se.sub.z. Alternatively, the conversion can be made by sequential deposition of In and/or Ga and Se onto the phase-separated precursor. The conversion process is preferably performed in the temperature range of about 300.degree.-600.degree. C., where the Cu(In,Ga)Se.sub.2 remains solid, while the excess Cu.sub.x Se is in a liquid flux. The characteristic of the resulting Cu.sub.w (In,Ga).sub.y Se.sub.z can be controlled by the temperature. Higher temperatures, such as 500.degree.-600.degree. C., result in a nearly stoichiometric Cu(In,Ga)Se.sub.2, whereas lower temperatures, such as 300.degree.-400.degree. C., result in a more Cu-poor compound, such as the Cu.sub.z (In,Ga).sub.4 Se.sub.7 phase.

Tuttle, John R. (Denver, CO); Contreras, Miguel A. (Golden, CO); Noufi, Rommel (Golden, CO); Albin, David S. (Denver, CO)

1994-01-01T23:59:59.000Z

272

Enhanced quality thin film Cu(In,Ga)Se[sub 2] for semiconductor device applications by vapor-phase recrystallization  

DOE Patents [OSTI]

Enhanced quality thin films of Cu[sub w](In,Ga[sub y])Se[sub z] for semiconductor device applications are fabricated by initially forming a Cu-rich, phase-separated compound mixture comprising Cu(In,Ga):Cu[sub x]Se on a substrate to form a large-grain precursor and then converting the excess Cu[sub x]Se to Cu(In,Ga)Se[sub 2] by exposing it to an activity of In and/or Ga, either in vapor In and/or Ga form or in solid (In,Ga)[sub y]Se[sub z]. Alternatively, the conversion can be made by sequential deposition of In and/or Ga and Se onto the phase-separated precursor. The conversion process is preferably performed in the temperature range of about 300--600 C, where the Cu(In,Ga)Se[sub 2] remains solid, while the excess Cu[sub x]Se is in a liquid flux. The characteristic of the resulting Cu[sub w](In,Ga)[sub y]Se[sub z] can be controlled by the temperature. Higher temperatures, such as 500--600 C, result in a nearly stoichiometric Cu(In,Ga)Se[sub 2], whereas lower temperatures, such as 300--400 C, result in a more Cu-poor compound, such as the Cu[sub z](In,Ga)[sub 4]Se[sub 7] phase. 7 figs.

Tuttle, J.R.; Contreras, M.A.; Noufi, R.; Albin, D.S.

1994-10-18T23:59:59.000Z

273

Identified high-pT spectra in Cu+Cu collisions at sqrt sNN=200 GeV  

SciTech Connect (OSTI)

We report new results on identified (anti)proton and charged pion spectra at large transverse momenta (3 < p{sub T} < 10 GeV/c) from Cu+Cu collisions at {radical}s{sub NN} = 200 GeV using the STAR detector at the Relativistic Heavy Ion Collider (RHIC). This study explores the system size dependence of two novel features observed at RHIC with heavy ions: the hadron suppression at high-p{sub T} and the anomalous baryon to meson enhancement at intermediate transverse momenta. Both phenomena could be attributed to the creation of a new form of QCD matter. The results presented here bridge the system size gap between the available pp and Au+Au data, and allow the detailed exploration for the on-set of the novel features. Comparative analysis of all available 200 GeV data indicates that the system size is a major factor determining both the magnitude of the hadron spectra suppression at large transverse momenta and the relative baryon to meson enhancement.

STAR Collaboration; Abelev, Betty

2010-07-05T23:59:59.000Z

274

Development and performance of Cu-based oxygen carriers for chemical-looping combustion  

SciTech Connect (OSTI)

Chemical-looping combustion (CLC) has the inherent property of separating the product CO{sub 2} from flue gases. Instead of air, it uses an oxygen carrier, usually in the form of a metal oxide, to provide oxygen for combustion. This paper focuses on the development and performance of a suitable Cu-based oxygen carrier for burning solid fuels using CLC. Carriers were made from CuO and Al{sub 2}O{sub 3} (as a support) in three different ways: mechanical mixing, wet impregnation, and co-precipitation. The reactivity of these solids was assessed by measuring their ability to oxidize CO, when in a hot bed of sand fluidized by a mixture of CO and N{sub 2}. After that, the Cu in the carrier was oxidized back to CuO by fluidizing the hot bed with air. These oxygen carriers were tested over many such cycles of reduction and oxidation. This work confirms that supporting CuO on Al{sub 2}O{sub 3} enhances the ability of the resulting particles to withstand mechanical and thermal stresses in a fluidized bed. Also, only co-precipitation produces particles that have a high loading of copper and do not agglomerate at 800-900 C. The performance of co-precipitated particles of CuO/Al{sub 2}O{sub 3} at oxidizing CO to CO{sub 2} was significantly affected by the pH of the solution in which precipitation occurred: a high pH (9.7) gave particles that reacted completely and rapidly. After 18 cycles, such a co-precipitated carrier with 82.5 wt% CuO yielded all its oxygen when oxidizing CO. X-ray analysis showed that when heated, CuO reacted with Al{sub 2}O{sub 3} to form CuAl{sub 2}O{sub 4}, which was fully reducible, so CuO experienced no loss in extent of reaction after forming this mixed oxide. An increase in operating temperature from 800 to 900 C led to the CuO providing slightly less oxygen; this was because a little of the CuO decomposed to Cu{sub 2}O between its reduction and oxidation, when the bed was fluidized by pure N{sub 2}. (author)

Chuang, S.Y.; Dennis, J.S.; Hayhurst, A.N.; Scott, S.A. [Department of Chemical Engineering, University of Cambridge, Pembroke Street, Cambridge, CB2 3RA, England (United Kingdom)

2008-07-15T23:59:59.000Z

275

Effective MgO surface doping of Cu/Zn/Al oxides as watergas shift catalysts  

Science Journals Connector (OSTI)

Trace amounts of MgO were doped on Cu/ZnO/Al2O3 catalysts with the Cu/Zn/Al molar ratio of 45/45/10 and tested for the watergas shift (WGS) reaction. A mixture of Zn(Cu)Al hydrotalcite (HT) and Cu/Zn aurichalcite was prepared by co-precipitation (cp) of the metal nitrates and calcined at 300C to form the catalyst precursor. When the precursor was dispersed in an aqueous solution of Mg(II) nitrate, HT was reconstituted by the memory effect. During this procedure, the catalyst particle surface was modified by MgO-doping, leading to a high sustainability. Contrarily, cp-Mg/Cu/Zn/Al prepared by Mg2+, Cu2+, Zn2+ and Al3+ co-precipitation as a control exhibited high activity but low sustainability. Mg2+ ions were enriched in the surface layer of m-MgCu/Zn/Al, whereas Mg2+ ions were homogeneously distributed throughout the particles of cp-Mg/Cu/Zn/Al. CuO particles were significantly sintered on the m-catalyst during the dispersion, whereas CuO particles were highly dispersed on the cp-catalyst. However, the m-catalyst was more sustainable against sintering than the cp-catalyst. Judging from TOF, the surface doping of MgO more efficiently enhanced an intrinsic activity of the m-catalyst than the cp-catalyst. Trace amounts of MgO on the catalyst surface were enough to enhance both activity and sustainability of the m-catalyst by accelerating the reductionoxidation between Cu0 and Cu+ and by suppressing Cu0 (or Cu+) oxidation to Cu2+.

Kazufumi Nishida; Dalin Li; Yingying Zhan; Tetsuya Shishido; Yasunori Oumi; Tsuneji Sano; Katsuomi Takehira

2009-01-01T23:59:59.000Z

276

Diffusion of the Cu monomer and dimer on Ag(111): Molecular dynamics simulations and density functional theory calculations  

Science Journals Connector (OSTI)

We present results of molecular dynamics (MD) simulations and density functional theory (DFT) calculations of the diffusion of Cu adatom and dimer on Ag(111). We have used potentials generated by the embedded-atom method for the MD simulations and pseudopotentials derived from the projected-augmented-wave method for the DFT calculations. The MD simulations (at three different temperatures: 300, 500, and 700 K) show that the diffusivity has an Arrhenius behavior. The effective energy barriers obtained from the Arrhenius plots are in excellent agreement with those extracted from scanning tunneling microscopy experiments. While the diffusion barrier for Cu monomers on Ag(111) is higher than that reported (both in experiment and theory) for Cu(111), the reverse holds for dimers [which, for Cu(111), has so far only been theoretically assessed]. In comparing our MD result with those for Cu islets on Cu(111), we conclude that the higher barriers for Cu monomers on Ag(111) results from the comparatively large Ag-Ag bond length, whereas for Cu dimers on Ag(111) the diffusivity is taken over and boosted by the competition in optimization of the Cu-Cu dimer bond and the five nearest-neighbor Cu-Ag bonds. Our DFT calculations confirm the relatively large barriers for the Cu monomer on Ag(111)69 and 75 meVcompared to those on Cu(111) and hint a rationale for them. In the case of the Cu dimer, the relatively long Ag-Ag bond length makes available a diffusion route whose highest relevant energy barrier is only 72 meV and which is not favorable on Cu(111). This process, together with another involving an energy barrier of 83 meV, establishes the possibility of low-barrier intercell diffusion by purely zigzag mechanisms.

Sardar Sikandar Hayat; Marisol Alcntara Ortigoza; Muhammad A. Choudhry; Talat S. Rahman

2010-08-03T23:59:59.000Z

277

High yield Cu-Co CPP GMR multilayer sensors  

SciTech Connect (OSTI)

We have fabricated and tested GMR magnetic flux sensors that operate in the CPP mode. This work is a continuation of the ultra-high density magnetic sensor research introduced at INTERMAG 96. We have made two significant modifications to the process sequence. First, contact to the sensor is made through a metal conduit deposited in situ with the multilayers. This deposition replaces electroplating. This configuration ensures a good electrical interface between the top of multilayer stack and the top contact, and a continuous, conductive current path to the sensor. The consequences of this modification are an increase in yield of operational devices to {ge}90% per wafer and a significant reduction of the device resistance to {le}560 milliohms and of the uniformity of the device resistance to {le}3%. Second, the as-deposited multilayer structure has been changed from [Cu 30 {angstrom}/Co 20 {angstrom}]{sub 18} (third peak) to [Cu 20.5 {angstrom}/Co 12 {angstrom}]{sub 30} (second peak) to increase the CPP and CIP responses. The sheet film second peak CIP GMR response is 18% and the sensitivity is 0.08 %/Oe. The sheet film third peak CIP GMR response is 8% and the sensitivity is 0. 05 %/Oe. The second peak CPP GMR response averaged over twenty devices on a four inch silicon substrate is 28% {+-} 6%. The response decreases radially from the substrate center. The average response at the center of the substrate is 33% {+-} 4%. The average second peak CPP sensitivity is 0.09 %/Oe {+-} 0.02 %/Oe. The best second peak CPP response from a single device is 39%. The sensitivity of that device is 0.13 %/Oe. The third peak CPP GMR response is approximately 14 %. The third peak CPP response sensitivity is 0.07 %/Oe. 6 refs., 3 figs.

Spallas, J., Mao, M., Law, B., Grabner, F., Cerjan, C., O`Kane, O.

1997-01-15T23:59:59.000Z

278

Negative permittivity and permeability spectra of Cu/yttrium iron garnet hybrid granular composite materials in the microwave frequency range  

SciTech Connect (OSTI)

The relative complex permittivity and permeability spectra of the coagulated copper and yttrium iron garnet (Cu/YIG) hybrid granular composite materials have been studied in the microwave range. The insulator to metal transition was observed at the percolation threshold of Cu particle content (?{sub Cu}?=?16.0 vol. %) in the electrical conductivity. In the percolation threshold, the low frequency plasmonic state caused by the metallic Cu particle networks was observed. The percolated Cu/YIG granular composites show simultaneous negative permittivity and permeability spectra under external magnetic fields.

Tsutaoka, Takanori, E-mail: tsutaok@hiroshima-u.ac.jp; Fukuyama, Koki; Kinoshita, Hideaki [Graduate School of Education, Hiroshima University, 1-1-1, Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8524 (Japan)] [Graduate School of Education, Hiroshima University, 1-1-1, Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8524 (Japan); Kasagi, Teruhiro [Tokuyama College of Technology, Gakuendai, Shunan, Yamaguchi 745-8585 (Japan)] [Tokuyama College of Technology, Gakuendai, Shunan, Yamaguchi 745-8585 (Japan); Yamamoto, Shinichiro; Hatakeyama, Kenichi [Graduate School of Engineering, University of Hyogo, Syosha, Himeji 671-2201 (Japan)] [Graduate School of Engineering, University of Hyogo, Syosha, Himeji 671-2201 (Japan)

2013-12-23T23:59:59.000Z

279

Studies on Cu/CeO{sub 2}: A new NO reduction catalyst  

SciTech Connect (OSTI)

Fine particle and large surface area Cu/CeO{sub 2} catalysts of crystallite sizes in the range of 100--200 {angstrom} synthesized by the solution combustion method have been investigated for NO reduction. Five percent Cu/CeO{sub 2} catalyst shows nearly 100% conversion of NO by NH{sub 3} below 300 C, whereas pure ceria and Zr, Y, and Ca doped ceria show 85--95% NO conversion above 600 C. Similarly NO reduction by CO has been observed over 5% Cu/CeO{sub 2} with nearly 100% conversion below 300 C. Hydrocarbon (n-butane) oxidation by NO to CO{sub 2}, N{sub 2}, and H{sub 2}O has also been demonstrated over this catalyst below 350 C making Cu/CeO{sub 2} a new NO reduction catalyst in the low temperature window of 150--350 C. Kinetics of NO reduction over 5% Cu/CeO{sub 2} have also been investigated. The rate constants are in the range of 1.4 {times} 10{sup 4} to 2.3 {times} 10{sup 4} cm{sup 3}/g s between 170 and 300 C. Cu/CeO{sub 2} catalysts are characterized by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, and electron paramagnetic resonance spectroscopy where Cu{sup 2+} ions are shown to be dispersed on the CeO{sub 2} surface.

Bera, P.; Aruna, S.T.; Patil, K.C.; Hegde, M.S. [Indian Inst. of Science, Bangalore (India)] [Indian Inst. of Science, Bangalore (India)

1999-08-15T23:59:59.000Z

280

Microstructure and Corrosion Behavior of the Cu-Pd-X Ternary Alloys for Hydrogen Separation Membranes  

SciTech Connect (OSTI)

CuPd alloys are among the most promising candidate materials for hydrogen separation membranes and membrane reactor applications due to their high hydrogen permeability and better sulfur resistance. In order to reduce the Pd content and, therefore, the cost of the membrane materials, efforts have been initiated to develop CuPdM ternary alloys having a bcc structure. The advantages of having Pd as a hydrogen separation membrane are: (1) high hydrogen selectivity; and (2) high hydrogen permeability. The disadvantages are: (1) high cost; (2) hydrogen embrittlement ({alpha} {yields} {beta} Pd hydride); and (3) sulfur poisoning. Experiments (XRD, SEM/EDS) verified that Mg, Al, La, Y and Ti are promising alloying elements to expand the B2 phase region in Cu-Pd binary system. HT-XRD showed that the B2 to FCC transition temperatures for Cu-Pd-X (X = Mg, Al, La, Y and Ti) are higher than that of Cu-Pd binary alloys. While the Cu-50Pd alloy had the highest corrosion resistance to the H2S containing syngas, the Cu-Pd-Mg alloy had a comparable resistance.

O.N. Dogan; M.C. Gao; B.H. Howard

2012-02-26T23:59:59.000Z

Note: This page contains sample records for the topic "bermuda cu cuba" from the National Library of EnergyBeta (NLEBeta).
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to obtain the most current and comprehensive results.


281

Unraveling the Active Site in Copper-Ceria Systems for the Water-Gas Shift Reaction: In Situ Characterization of an Inverse Powder CeO2-x/CuO-Cu Catalyst  

SciTech Connect (OSTI)

An inverse powder system composed of CeO{sub 2} nanoparticles dispersed over a CuO-Cu matrix is proposed as a novel catalyst for the water-gas shift reaction. This inverse CeO{sub 2}/CuO-Cu catalyst exhibits a higher activity than standard Cu/CeO{sub 2} catalysts. In situ synchrotron characterization techniques were employed to follow the structural changes of CeO{sub 2}/CuO-Cu under reaction conditions. Time-resolved X-ray diffraction experiments showed the transformation of CuO to metallic Cu via a Cu{sub 2}O intermediate. Short-order structural changes were followed by pair distribution function analysis and corroborated the results obtained by diffraction. Moreover, X-ray absorption spectroscopy also revealed oxidation state changes from Cu{sup 2+} to Cu{sup 0} and the partial reduction of CeO{sub x} nanoparticles. The activity data obtained by mass spectrometry revealed that hydrogen production starts once the copper has been fully reduced. The strong interaction of ceria and copper boosted the catalytic performance of the sample. The inverse catalyst was active at low temperatures, stable to several reaction runs and to redox cycles. These characteristics are highly valuable for mobile fuel cell applications. The active phases of the inverse CeO{sub 2}/CuO-Cu catalyst are partially reduced ceria nanoparticles strongly interacting with metallic copper. The nature and structure of the ceria nanoparticles are of critical importance because they are involved in processes related to water dissociation over the catalyst surface.

Barrio, L.; Estrella, M; Zhou, G; Wen, W; Hanson, J; Hungria, A; Hornes, A; Fernandez-Garcia, M; Martinez-Arias, A; Rodriguez, J

2010-01-01T23:59:59.000Z

282

Unraveling the Active Site in Copper-ceria Systems for the Water Gas Shift Reaction: In-situ Characterization of an Inverse Powder CeO2-x/CuO-Cu Catalyst  

SciTech Connect (OSTI)

An inverse powder system composed of CeO{sub 2} nanoparticles dispersed over a CuO-Cu matrix is proposed as a novel catalyst for the water-gas shift reaction. This inverse CeO{sub 2}/CuO-Cu catalyst exhibits a higher activity than standard Cu/CeO{sub 2} catalysts. In situ synchrotron characterization techniques were employed to follow the structural changes of CeO{sub 2}/CuO-Cu under reaction conditions. Time-resolved X-ray diffraction experiments showed the transformation of CuO to metallic Cu via a Cu{sub 2}O intermediate. Short-order structural changes were followed by pair distribution function analysis and corroborated the results obtained by diffraction. Moreover, X-ray absorption spectroscopy also revealed oxidation state changes from Cu{sup 2+} to Cu{sup 0} and the partial reduction of CeOx nanoparticles. The activity data obtained by mass spectrometry revealed that hydrogen production starts once the copper has been fully reduced. The strong interaction of ceria and copper boosted the catalytic performance of the sample. The inverse catalyst was active at low temperatures, stable to several reaction runs and to redox cycles. These characteristics are highly valuable for mobile fuel cell applications. The active phases of the inverse CeO{sub 2}/CuO-Cu catalyst are partially reduced ceria nanoparticles strongly interacting with metallic copper. The nature and structure of the ceria nanoparticles are of critical importance because they are involved in processes related to water dissociation over the catalyst surface.

Rodriguez, J.A.; Barrio, L.; Estrella, M.; Zhou, G.; Wen, W.; Hanson, J.C.; Hungra, A.B.; Horns, A.; Fernndez-Garca, M.; Arturo Martnez-Arias, A.

2010-03-04T23:59:59.000Z

283

Morphological and Structural Changes During the Reduction and Reoxidation of CuO/CeO(2) and Ce(1-x)Cu(x)O(2) Nanocatalysts: In-situ Studies with Environmental TEM, XRD and XAS  

SciTech Connect (OSTI)

We have studied the structural, morphological, and electronic properties of CuO/CeO{sub 2} and Ce{sub 1-x}Cu{sub x}O{sub 2} nanocatalysts during reduction/oxidation cycles using H{sub 2} and O{sub 2} as chemical probes. Time-resolved in situ characterization was performed by X-ray diffraction (XRD) and X-ray absorption spectroscopy (XAS) as well as aberration-corrected environmental transmission electron microscopy (ETEM). We have found that both types of nanocatalysts reduce to a Cu/CeO{sub 2} biphase system with significant oxygen vacancies in CeO{sub 2}. Important variations are seen in the Cu particle size and metal dispersion depending on the initial state of the copper oxide-ceria systems. During subsequent in situ oxygen annealing, the Cu precipitated from the CuO/CeO{sub 2} system reoxidized to form CuO through a Cu{sub 2}O intermediate phase as expected. However, the Cu precipitated from the Ce{sub 0.8}Cu{sub 0.2}O{sub 2} solid solution behaved rather differently under oxidizing conditions, and neither oxidized to form CuO nor fully returned to a bulk Ce{sub 0.8}Cu{sub 0.2}O{sub 2} phase in solid solution. We found that {approx} 50% of the Cu returned to a Ce{sub 1-x}Cu{sub x}O{sub 2} solid solution, while the remainder was observed by in situ ETEM to form an amorphous copper oxide phase with a Cu oxidation state similar to Ce{sub 1-x}Cu{sub x}O{sub 2}, but with a local bonding environment similar to CuO. The behavior of the reduced Ce{sub 0.8}Cu{sub 0.2}O{sub 2} reflects strong interactions between Cu and the ceria matrix and illustrates the advantages of working with solid solutions of mixed oxides.

Rodriguez, J.A.; Ciston, J.; Si, R.; Hanson, J.C.; Martnez-Arias, A.; Fernandez-Garca, M.; Zhu, Y.

2011-07-21T23:59:59.000Z

284

Synthesis, structure and properties of new chain cuprates, Na{sub 3}Cu{sub 2}O{sub 4} and Na{sub 8}Cu{sub 5}O{sub 10}  

SciTech Connect (OSTI)

Na{sub 3}Cu{sub 2}O{sub 4} and Na{sub 8}Cu{sub 5}O{sub 10} were prepared via the azide/nitrate route from stoichiometric mixtures of the precursors CuO, NaN{sub 3} and NaNO{sub 3}. Single crystals have been grown by subsequent annealing of the as prepared powders at 500 deg. C for 2000h in silver crucibles, which were sealed in glass ampoules under dried Ar. According to the X-ray analysis of the crystal structures (Na{sub 3}Cu{sub 2}O{sub 4}: P2{sub 1}/n, Z=4, a=5.7046(2), b=11.0591(4), c=8.0261(3)A, {beta}=108.389(1){sup o}, 2516 independent reflections, R{sub 1}(all)=0.0813, wR{sub 2} (all)=0.1223; Na{sub 8}Cu{sub 5}O{sub 10}: Cm, Z=2, a=8.228(1), b=13.929(2), c=5.707(1)A, {beta}=111.718(2){sup o}, 2949 independent reflections, R{sub 1}(all)=0.0349, wR{sub 2} (all)=0.0850), the main feature of both crystal structures are CuO{sub 2} chains built up from planar, edge-sharing CuO{sub 4} squares. From the analysis of the Cu-O bond lengths, the valence states of either +2 or +3 can be unambiguously assigned to each copper atom. In Na{sub 3}Cu{sub 2}O{sub 4} these ions alternate in the chains, in Na{sub 8}Cu{sub 5}O{sub 10} the periodically repeated part consists of five atoms according to Cu{sup II}-Cu{sup II}-Cu{sup III}-Cu{sup II}-Cu{sup III}. The magnetic susceptibilities show the dominance of antiferromagnetic interactions. At high temperatures the compounds exhibit Curie-Weiss behaviour (Na{sub 3}Cu{sub 2}O{sub 4}: {mu}=1.7{mu}{sub B}, {theta}=-160K, Na{sub 8}Cu{sub 5}O{sub 10}: {mu}=1.8{mu}{sub B}, {theta}=-58K, magnetic moments per divalent copper ion). Antiferromagmetic ordering is observed to occur in these compounds below 13K (Na{sub 3}Cu{sub 2}O{sub 4}) and 24K (Na{sub 8}Cu{sub 5}O{sub 10})

Sofin, Mikhail [Max-Planck-Institut fuer Festkoerperforschung, Heisenbergstr. 1, D-70569 Stuttgart (Germany); Peters, Eva-Maria [Max-Planck-Institut fuer Festkoerperforschung, Heisenbergstr. 1, D-70569 Stuttgart (Germany); Jansen, Martin [Max-Planck-Institut fuer Festkoerperforschung, Heisenbergstr. 1, D-70569 Stuttgart (Germany)]. E-mail: jansen@fkf.mpg.de

2005-12-15T23:59:59.000Z

285

Investigation of thermal, mechanical and magnetic behaviors of the Cu-11%Al alloy with Ag and Mn additions  

SciTech Connect (OSTI)

The investigation of thermal, mechanical and magnetic behaviors of the Cu-11%Al, Cu-11%Al-3%Ag, Cu-11%Al-10%Mn and Cu-11%Al-10%Mn-3%Ag alloys was made using microhardness measurements, differential scanning calorimetry, X-ray diffractometry, scanning electron microscopy, energy dispersion X-ray spectroscopy and magnetic moment change with applied field measurement. The results indicated that the Mn addition changes the phase stability range, the microhardness values and makes undetectable the eutectoid reaction in annealed Cu-11%Al and Cu-11%Al-3%Ag alloys while the presence of Ag does not modify the phase transformation sequence neither microhardness values of the annealed Cu-11%Al and Cu-11%Al-10%Mn alloys, but it increases the magnetic moment of this latter at about 2.7 times and decreases the rates of eutectoid and peritectoid reactions of the former. - Highlights: Black-Right-Pointing-Pointer The microstructure of Cu-Al alloy is modified in the Ag presence. Black-Right-Pointing-Pointer ({alpha} + {gamma}) phase is stabilized down to room temperature when Ag is added to Cu-Al alloy. Black-Right-Pointing-Pointer Ag-rich phase modifies the magnetic characteristics of Cu-Al-Mn alloy.

Silva, R.A.G., E-mail: galdino.ricardo@gmail.com [Departamento de Ciencias Exatas e da Terra-UNIFESP, Diadema-SP (Brazil)] [Departamento de Ciencias Exatas e da Terra-UNIFESP, Diadema-SP (Brazil); Paganotti, A.; Gama, S. [Departamento de Ciencias Exatas e da Terra-UNIFESP, Diadema-SP (Brazil)] [Departamento de Ciencias Exatas e da Terra-UNIFESP, Diadema-SP (Brazil); Adorno, A.T.; Carvalho, T.M.; Santos, C.M.A. [Instituto de Quimica - UNESP, Araraquara-SP (Brazil)] [Instituto de Quimica - UNESP, Araraquara-SP (Brazil)

2013-01-15T23:59:59.000Z

286

Polycrystalline oxides formation during transient oxidation of (001) Cu-Ni binary alloys studied by in situ TEM and XRD.  

SciTech Connect (OSTI)

The nucleation and growth of Cu{sub 2}O and NiO islands due to oxidation of Cu{sub x}Ni{sub 1-x} (001) films were monitored, at various temperatures, by in situ ultra-high vacuum (UHV) transmission electron microscopy (TEM) and in situ synchrotron X-ray diffraction (XRD). In remarkable contrast to our previous observations of Cu and Cu-Au oxidation, irregular-shaped polycrystalline oxide islands formed with respect to the Cu-Ni alloy film, and an unusual second oxide nucleation stage was noted. In situ XRD experiments revealed that NiO formed first epitaxially, then other orientations appeared, and finally polycrystalline Cu{sub 2}O developed as the oxidation pressure was increased. The segregation of Ni and Cu towards or away, respectively, from the alloy surface during oxidation could disrupt the surface and cause polycrystalline oxide formation.

Yang, J. C.; Li, Z. Q.; Sun, L.; Zhou, G. W.; Eastman, J. A.; Fong, D. D.; Fuoss, P. H.; Baldo, P. M.; Rehn, L. E.; Thompson, L. J.; Materials Science Division; Univ.of Pittsburgh; State Univ. of New York at Binghamton

2009-01-01T23:59:59.000Z

287

The structural and mechanical properties of a Cu??Zr??(at. %) alloy processed by High-Velocity-Injection (HVI)  

E-Print Network [OSTI]

) cooling rate, (3) defects and/or defect structure, (4) density and, (5) purity. The samples investigated in this research will be a copper- zirconium alloy of composition Cu Zr (at. ?) . This alloy was chosen because it is a member of a group...+Zr, C E6 8220C 4~0. 2 a~Zr, Cu 3200 2800 u 2600 ur 2400 g O 2200 ~ 2000 ~ i800 ~ l 600 i 100'C piZrCu3 965'C 935'C 895 C )I Sar I I g 47 92PC ~ 'C 1 400 Zr, cu $ ZrCu R O ZrCu~+Cu l200 lO 20 30 40 50 60 70 80 90 l00 WEIGHT...

Hays, Charles C.

2012-06-07T23:59:59.000Z

288

Anisotropic empty electron-band states at the pseudo-55 Si(111)/Cu interface  

Science Journals Connector (OSTI)

The partial (s-d) density of empty states at the Cu site in the pseudo-55 Si(111)/Cu interface has been investigated by polarization-dependent x-ray absorption spectroscopy at the Cu L2,3 edges. The absorption spectra are strongly dichroic showing a metallic edge in the interface plane and a quasigap in the perpendicular direction. The two-dimensional nature of the electron-band states at the pseudo-55 interface layer is therefore directly probed.

Massimo Sancrotti; Maurizio Sacchi; Oumar Sakho; Giorgio Rossi

1991-07-15T23:59:59.000Z

289

Alloy Catalyst in a Reactive Environment: The Example of Ag-Cu Particles for Ethylene Epoxidation  

Science Journals Connector (OSTI)

Combining first-principles calculations and insitu photoelectron spectroscopy, we show how the composition and structure of the surface of an alloy catalyst is affected by the temperature and pressure of the reagents. The Ag-Cu alloy, recently proposed as an improved catalyst for ethylene epoxidation, forms a thin Cu-O surface oxide, while a Ag-Cu surface alloy is found not to be stable. Several possible surface structures are identified, among which the catalyst surface is likely to dynamically evolve under reaction conditions.

Simone Piccinin; Spiros Zafeiratos; Catherine Stampfl; Thomas W. Hansen; Michael Hvecker; Detre Teschner; Valerii I. Bukhtiyarov; Frank Girgsdies; Axel Knop-Gericke; Robert Schlgl; Matthias Scheffler

2010-01-22T23:59:59.000Z

290

Microstructural variations in Cu/Nb and Al/Nb nanometallic multilayers  

SciTech Connect (OSTI)

Miscible (Al/Nb) and immiscible (Cu/Nb) nanometallic multilayer systems were characterized by means of transmission electron microscopy techniques, primarily by automated crystallographic orientation mapping, which allows for the resolution of crystal structures and orientations at the nanoscale. By using this technique, distinctive Nb orientations in relation to the crystallographic state of the Al and Cu layer structures can be observed. Specifically, the Al and Cu layers were found to consist of amorphous, semi-amorphous, and crystalline regions, which affect the overall multilayer microstructure.

Polyakov, M. N.; Hodge, A. M. [Department of Aerospace and Mechanical Engineering, University of Southern California, Los Angeles, California 90089 (United States)] [Department of Aerospace and Mechanical Engineering, University of Southern California, Los Angeles, California 90089 (United States); Courtois-Manara, E.; Wang, D.; Kuebel, C. [Institute of Nanotechnology and Karlsruhe NanoMicro Facility, Karlsruhe Institute of Technology, 76021 Karlsruhe (Germany)] [Institute of Nanotechnology and Karlsruhe NanoMicro Facility, Karlsruhe Institute of Technology, 76021 Karlsruhe (Germany); Chakravadhanula, K. [Institute of Nanotechnology and Karlsruhe NanoMicro Facility, Karlsruhe Institute of Technology, 76021 Karlsruhe (Germany) [Institute of Nanotechnology and Karlsruhe NanoMicro Facility, Karlsruhe Institute of Technology, 76021 Karlsruhe (Germany); Helmholtz Institute Ulm, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen (Germany)

2013-06-17T23:59:59.000Z

291

Adsorption and chemical reaction of Cu(hfac)(vtms) on Young Su Chung, Hyoo Suk Lee, Yoon Sup Lee, Sehun Kim *  

E-Print Network [OSTI]

Adsorption and chemical reaction of Cu(hfac)(vtms) on Cu(1 1 1) Young Su Chung, Hyoo Suk Lee, Yoon the adsorption and reaction of Cu(hfac) (vtms) (hexa¯uoroacetylacetonate, hfac; vinyl tri- methyl silane, vtms between adsorbed Cu(hfac) molecules were observed to occur between 240 and 400 K. The adsorption geo

Kim, Sehun

292

A Theoretical Study of Methanol Synthesis from CO(2) Hydrogenation on Metal-doped Cu(111) Surfaces  

SciTech Connect (OSTI)

Density functional theory (DFT) calculations and Kinetic Monte Carlo (KMC) simulations were employed to investigate the methanol synthesis reaction from CO{sub 2} hydrogenation (CO{sub 2} + 3H{sub 2} {yields} CH{sub 3}OH + H{sub 2}O) on metal-doped Cu(111) surfaces. Both the formate pathway and the reverse water-gas shift (RWGS) reaction followed by a CO hydrogenation pathway (RWGS + CO-Hydro) were considered in the study. Our calculations showed that the overall methanol yield increased in the sequence: Au/Cu(111) < Cu(111) < Pd/Cu(111) < Rh/Cu(111) < Pt/Cu(111) < Ni/Cu(111). On Au/Cu(111) and Cu(111), the formate pathway dominates the methanol production. Doping Au does not help the methanol synthesis on Cu(111). Pd, Rh, Pt, and Ni are able to promote the methanol production on Cu(111), where the conversion via the RWGS + CO-Hydro pathway is much faster than that via the formate pathway. Further kinetic analysis revealed that the methanol yield on Cu(111) was controlled by three factors: the dioxomethylene hydrogenation barrier, the CO binding energy, and the CO hydrogenation barrier. Accordingly, two possible descriptors are identified which can be used to describe the catalytic activity of Cu-based catalysts toward methanol synthesis. One is the activation barrier of dioxomethylene hydrogenation, and the other is the CO binding energy. An ideal Cu-based catalyst for the methanol synthesis via CO{sub 2} hydrogenation should be able to hydrogenate dioxomethylene easily and bond CO moderately, being strong enough to favor the desired CO hydrogenation rather than CO desorption but weak enough to prevent CO poisoning. In this way, the methanol production via both the formate and the RWGS + CO-Hydro pathways can be facilitated.

Liu P.; Yang, Y.; White, M.G.

2012-01-12T23:59:59.000Z

293

Local Cu and Br environments and their relationship to superconductivity restoration in brominated YBa{sub 2}Cu{sub 3}O{sub y}  

SciTech Connect (OSTI)

{sup 63,65}Cu nuclear quadrupole resonance (NQR) and Br {ital k}-edge x-ray absorption fine structure (XAFS) have been used to study the local structures in well-characterized samples of deoxygenated and brominated YBa{sub 2}Cu{sub 3}O{sub y}(YBCO). NQR shows that after bromination of YBa{sub 2}Cu{sub 3}O{sub 6.1} at 260thinsp{degree}C, oxygen has repopulated the chain sites. From XAFS, it is concluded that Br does not enter the YBCO lattice, but rather precipitates out as small nanoscale particles of BaBr{sub 2}. These results provide clear evidence of the role of Br in reoxygenating the YBCO structure and an explanation for the partial restoration of superconductivity in the YBCO system. {copyright} {ital 1998 American Institute of Physics.}

Potrepka, D.M.; Fenner, D.B.; Balasubramanian, M.; Hines, W.A.; Budnick, J.I. [Department of Physics and Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269 (United States)] [Department of Physics and Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269 (United States)

1998-08-01T23:59:59.000Z

294

Nanoscale Materials for Thin Film Cu(In,Ga)Se2 Solar Cells  

Science Journals Connector (OSTI)

Cu(In,Ga)Se2 solar cells show the highest efficiencies of all thin film technologies. Nano-particulate precursor materials could have the potential to lead this technology to...

Ahlswede, Erik

295

Synthesis of colloidal CuInSe2 nanoparticles by electrical spark discharge in liquid  

Science Journals Connector (OSTI)

This work presents a low-cost, non-vacuum, and facile process for fabrication of CuInSe2 (CIS) nanoparticles using electrical discharge treatment of mixture of copper, indium, and selenium powders between two tu...

Mehdi Mardanian; Alena A. Nevar; Michael Nedelko

2013-10-01T23:59:59.000Z

296

A polarizer chip based on CMOS Cu-interconnect for optical telecommunications  

Science Journals Connector (OSTI)

The construction by CMOS Cu-interconnect fabrication technology of an optical chip that performs the function of linear polarization is described. The chip consists of three rows of...

Ko, Cheng-Hao; Lee, Kuei-Jen

2006-01-01T23:59:59.000Z

297

Microstructure and Strengthening Mechanisms of Highly Textured Cu/Ni Multilayers  

E-Print Network [OSTI]

In this thesis, I planned to fabricate Cu/Ni metallic multilayers with equal layer thicknesses on different substrates by using magnetic sputtering technique. My objective was to characterize the texture, structure and hardness, in order to study...

Liu, Yue

2011-10-21T23:59:59.000Z

298

Zn3P2 and Cu2O substrates for solar energy conversion.  

E-Print Network [OSTI]

??Zinc phosphide (Zn3P2) and cuprous oxide (Cu2O) are promising and earth-abundant alternatives to traditional thin film photovoltaics materials such as CIGS, CdTe, and a-Si. We (more)

Kimball, Gregory Michael

2012-01-01T23:59:59.000Z

299

Vibrational, giant dielectric and AC conductivity properties of agglomerated CuO nanostructures  

Science Journals Connector (OSTI)

We report frequency, temperature dependent dielectric response and AC conductivity of nanocrystalline CuO. These nanoparticles were prepared using solgel technique. Prepared particles were made as a pellet us...

K. R. Deepthi; T. Pandiyarajan

2013-03-01T23:59:59.000Z

300

Effect of Cu doping on Hole Mobility in CdTe  

SciTech Connect (OSTI)

High quality CdTe thin films grown by laser deposition technique and heavily doped with Cu have recently been reported to have resistivity and hole mobility comparable to those of bulk single crystals. To explain the experimental results we have calculated the effect of Cu on the band structure and phonon spectrum of CdTe using the density functional theory (DFT) and the linearized augmented plane wave (LAPW) method. We found that the introduction of a high density of Cu can lead to a reduction in the hole-LO phonon scattering. In addition, Cu doping can remove Cd vacancies in CdTe and thereby enhance the hole mobility in CdTe.

Ma Zhixun; Mao, Samuel S. [Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (United States); Liu Lei; Yu, Peter Y. [Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (United States); Department of Physics, University of California at Berkeley, Berkeley, CA 94720 (United States)

2010-01-04T23:59:59.000Z

Note: This page contains sample records for the topic "bermuda cu cuba" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Evaluation of Quasicrystal Al-Cu-Fe Alloys for Tribological Applications  

E-Print Network [OSTI]

This research investigated the tribological performance of a composite material, formed from an ultra high molecular weight polyethylene (UHMWPE) matrix and quasicrystalline Al-Cu-Fe alloy powders. An evaluation was conducted for the microstructure...

Nabelsi, Nezar

2013-07-22T23:59:59.000Z

302

Investigation of Cu(II)/2',3'-isopropylidene adenosine complex  

SciTech Connect (OSTI)

The UV spectrum and polarographic behavior of Cu(II)/IpA complex was investigated, in an aqueous solution of Cu(II)/IpA complex, in Britton Robinson buffer solution at a pH from 5.0 to 8.0. At a low concentration of Cu(II)/IpA complex, maximum absorbance was shown to be 532 nm. Only one polarographic wave was found dependent on a two electron reduction. The composition ratio of the complex was obtained by both UV spectrum and polarography, it was found that the ratio of Cu(II) to IpA was 1:2. The polarography was shown by a two-electron reduction wave.

Hatano, A.

1987-07-01T23:59:59.000Z

303

E-Print Network 3.0 - additional cu layer Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

(2009), doi:10.1016j.electacta.2008.12.037 Summary: additives on film properties and formation rates were also examined. Cu reduction kinetics decreased... the properties of...

304

Modellversuche zu Grenzflchenreaktionen an n-CuInSe2 im UHV  

Science Journals Connector (OSTI)

For a detailed understanding of the formation conditions of a heterojunction observed at the n-CuInSe2...-polyiodide electrolyte contact, model experiments in the UHV were performed: Adsorption of H2O and Cl2 on ...

M. Sander; H. J. Lewerenz; W. Jaegermann

1987-01-01T23:59:59.000Z

305

E-Print Network 3.0 - al cu sn Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Uniwersytet Jagiellonski Collection: Physics 6 Defect physics of the kesterite thin-film solar cell absorber Cu2ZnSnS4 Shiyou Chen,1,2 Summary: Defect physics of the...

306

Temporal stability of Y Ba Cu O nano Josephson junctions from ion irradiation  

E-Print Network [OSTI]

stability of Y-Ba-Cu-O nano Josephson junctions from ionion irradiation through a nano-scale implant mask fabricateda two-dimensional array, Nano Letters, 9, pp. 3581-3585, [

Cybart, Shane A.

2014-01-01T23:59:59.000Z

307

Structure, Magnetism, and Transport of CuCr2Se4 Thin Films  

E-Print Network [OSTI]

Structure, Magnetism, and Transport of CuCr 2 Se 4 Thindichroism shows that the magnetism persists to the surfacesuch as the nature of magnetism at surfaces and interfaces.

2008-01-01T23:59:59.000Z

308

A Comparison of Melt Processes to Prepare YBaCuO with High J c  

Science Journals Connector (OSTI)

There are several melt processes which promise high J c ...in bulk YBaCuO. A comparison of various melt processes such as MTG and MPMG was performed in this stud...

M. Murakami; A. Kondoh; H. Fujimoto; K. Takamuku

1992-01-01T23:59:59.000Z

309

Electronic properties and morphology of Cu-phthalocyanineC{sub 60} composite mixtures  

SciTech Connect (OSTI)

Phthalocyanines in combination with C{sub 60} are benchmark materials for organic solar cells. Here, we have studied the morphology and electronic properties of co-deposited mixtures (blends) of these materials forming a bulk heterojunction as a function of the concentration of the two constituents. For a concentration of 1:1 of Cu-Phthalocyanine (CuPc):C{sub 60}, a phase separation into about 100?nm size domains is observed, which results in electronic properties similar to layered systems. For low C{sub 60} concentrations (10:1 CuPc:C{sub 60}), the morphology, as indicated by Low-Energy Electron Microscopy images, suggests a growth mode characterized by (amorphous) domains of CuPC, whereby the domain boundaries are decorated with C{sub 60}. Despite of these markedly different growth modes, the electronic properties of the heterojunction films are essentially unchanged.

Roth, Friedrich [Center for Free-Electron Laser Science/DESY, Notkestrae 85, D-22607 Hamburg (Germany); Lupulescu, Cosmin [Institute of Optics and Atomic Physics, TU Berlin, Strae des 17. Juni 135, D-10623 Berlin (Germany); Arion, Tiberiu [Center for Free-Electron Laser Science/DESY, Notkestrae 85, D-22607 Hamburg (Germany); Institut fr Experimentalphysik, Universitt Hamburg, Luruper Chaussee 149, D-22761 Hamburg (Germany); Darlatt, Erik; Gottwald, Alexander [Physikalisch-Technische Bundesanstalt (PTB), Abbestrae 2-12, D-10587 Berlin (Germany); Eberhardt, Wolfgang [Center for Free-Electron Laser Science/DESY, Notkestrae 85, D-22607 Hamburg (Germany); Institute of Optics and Atomic Physics, TU Berlin, Strae des 17. Juni 135, D-10623 Berlin (Germany)

2014-01-21T23:59:59.000Z

310

Rusting Evolution of MnCuP Weathering Steel Submitted to Simulated Industrial Atmospheric Corrosion  

Science Journals Connector (OSTI)

The rusting evolution of MnCuP weathering steel in a simulated industrial atmosphere as a...?-FeOOH. During the second corrosion stage, a compact and protective inner rust layer forms with a higher relative abund...

Long Hao; Sixun Zhang; Junhua Dong; Wei Ke

2012-05-01T23:59:59.000Z

311

The adsorption of water on Cu2O and Al2O3 thin films  

E-Print Network [OSTI]

of Cu 2 O collected in UHV. (22) Diebold, U. Surf. Sci. Rep.studies in ultrahigh vacuum (UHV) and at low temperaturesO 1s spectrum recorded in UHV (a single peak due to Al 2 O

Deng, Xingyi

2010-01-01T23:59:59.000Z

312

Single Source Electron Beam Evaporation of Bi-Sr-Ca-Cu-O Thin Films  

Science Journals Connector (OSTI)

A modified electron beam evaporation technique for the deposition of BiSrCaCuO thin films has been developed. In contrast to the conventional hearthed electron beam crucible the design in the present study use...

M. Ghanashyam Krishna; G. K. Muralidhar

1990-01-01T23:59:59.000Z

313

Comparison of CsBr and KBr coated Cu photocathodes: Effects of...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Comparison of CsBr and KBr coated Cu photocathodes: Effects of laser irradiation and work function changes. Abstract: Thin films (7 nm layers) of CsBr and KBr were deposited...

314

Resistance Reduction Induced by Small Electric Current in CoCu Porous Films  

Science Journals Connector (OSTI)

Resistance Reduction Induced by Small Electric Current in CoCu Porous Films ... The investigation of electrics discovered that resistance reduction could be induced by a small electric current in these ferromagnetic porous films. ...

Zhigang Li; Weiping Cai; Peisheng Liu; Qintao Li; Liangjian Zou

2010-01-20T23:59:59.000Z

315

ELEMENTARY DIFFUSION PROCESSES IN AL-CU-ZN ALLOYS: AN AB INITIO STUDY  

E-Print Network [OSTI]

ELEMENTARY DIFFUSION PROCESSES IN AL-CU-ZN ALLOYS: AN AB INITIO STUDY S. GRABOWSKI AND P. ENTEL of alloys such as mechanical strength and toughness, creep and corrosion resistance are essentially

Entel, P.

316

Development of Cu(2)ZnSn(S,Se)(4) based solar cells.  

E-Print Network [OSTI]

??Thin film solar cell technologies are rapidly developing, and chalcopyrite (Cu(In,Ga)Se2) based devices have demonstrated the highest power conversion efficiencies on the laboratory scale. However, (more)

Fairbrother, Andrew

2014-01-01T23:59:59.000Z

317

Photocatalytic performance of TiO2 thin films connected with Cu micro-grid  

Science Journals Connector (OSTI)

Aiming at reducing the recombination of photo-induced carriers in semiconductor photocatalytic process, we prepared TiO2...thin film with its surface modified by a connected Cu micro-grid via a microsphere lithog...

HaiLing Zhu; JunYing Zhang; TianMin Wang

2009-08-01T23:59:59.000Z

318

Characterization of Cu{sub 6}Sn{sub 5} intermetallic powders produced by water atomization and powder heat treatment  

SciTech Connect (OSTI)

Since the Cu{sub 6}Sn{sub 5} intermetallic shows its importance in industrial applications, the Cu{sub 6}Sn{sub 5} intermetallic-containing powders, produced by a powder processing route with a high production rate, were characterized. The route consisted of water atomization of an alloy melt (Cu61 wt.% Sn) and subsequent heat treatment of the water-atomized powders. Characterization of the water-atomized powders and their heated forms was conducted by using X-ray diffraction, scanning electron microscopy and transmission electron microscopy. Fine water-atomized powder microstructures consisted of primary hexagonal ?-Cu{sub 6.25}Sn{sub 5} dendrites coexisting with interdendritic ?-Cu{sub 6.25}Sn{sub 5} + ?-Sn eutectic. Solidification of fine melt droplets was governed by surface nucleation and growth of the primary hexagonal ?-Cu{sub 6.25}Sn{sub 5} dendrites followed by ?-Cu{sub 6.25}Sn{sub 5} + ?-Sn eutectic solidification of the remnant liquid. In coarse melt droplets, nucleation and growth of primary ?-Cu{sub 3}Sn dendrites were followed by peritectic reaction (?-Cu{sub 3}Sn + liquid ? ?-Cu{sub 6.25}Sn{sub 5}) or direct crystallization of ?-Cu{sub 6.25}Sn{sub 5} phase from the undercooled melt. Finally, the ?-Cu{sub 6.25}Sn{sub 5} + ?-Sn eutectic solidification of the remnant liquid occurred. Heating of the water-atomized powders at different temperatures resulted in microstructural homogenization. The water-atomized powders with mixed phases were transformed to powders with single monoclinic ?-Cu{sub 6}Sn{sub 5} phase. - Highlights: The Cu{sub 6}Sn{sub 5} intermetallic powder production route was proposed. Single phase Cu{sub 6}Sn{sub 5} powders could be by water atomization and heating. Water-atomized CuSn powders contained mixed CuSn phases. Solidification and heat treatment of water-atomized CuSn powders are explained.

Tongsri, Ruangdaj, E-mail: ruangdt@mtec.or.th [Powder Metallurgy Research and Development Unit (PM-RDU), National Metal and Materials Technology Center, 114 Paholyothin, Klong 1, Klong Luang, Pathum Thani 12120 (Thailand); Yotkaew, Thanyaporn, E-mail: thanyy@mtec.or.th [Powder Metallurgy Research and Development Unit (PM-RDU), National Metal and Materials Technology Center, 114 Paholyothin, Klong 1, Klong Luang, Pathum Thani 12120 (Thailand); Krataitong, Rungtip, E-mail: rungtipk@mtec.or.th [Powder Metallurgy Research and Development Unit (PM-RDU), National Metal and Materials Technology Center, 114 Paholyothin, Klong 1, Klong Luang, Pathum Thani 12120 (Thailand); Wila, Pongsak, E-mail: pongsakw@mtec.or.th [Powder Metallurgy Research and Development Unit (PM-RDU), National Metal and Materials Technology Center, 114 Paholyothin, Klong 1, Klong Luang, Pathum Thani 12120 (Thailand); Sir-on, Autcharaporn, E-mail: autchars@mtec.or.th [Materials Characterization Research Unit (MCRU), National Metal and Materials Technology Center, 114 Paholyothin, Klong 1, Klong Luang, Pathum Thani 12120 (Thailand); Muthitamongkol, Pennapa, E-mail: pennapm@mtec.or.th [Materials Characterization Research Unit (MCRU), National Metal and Materials Technology Center, 114 Paholyothin, Klong 1, Klong Luang, Pathum Thani 12120 (Thailand); Tosangthum, Nattaya, E-mail: nattayt@mtec.or.th [Powder Metallurgy Research and Development Unit (PM-RDU), National Metal and Materials Technology Center, 114 Paholyothin, Klong 1, Klong Luang, Pathum Thani 12120 (Thailand)

2013-12-15T23:59:59.000Z

319

Examination of the cu/si(111) 55 structure by scanning tunneling microscopy  

Science Journals Connector (OSTI)

The incommensurate 55 Cu/Si(111) structure has been examined by scanning tunneling microscopy. Images show that the surface structure is not well described as a hexagonal copper layer modulated at the Si(111) periodicity. Rather, the surface breaks up into 55 subunits which pack at spacings varying from 5 to 7 lattice constants, implying that substrate-adsorbate interactions dominate lateral interactions within the Cu adlayer.

R. J. Wilson; S. Chiang; F. Salvan

1988-12-15T23:59:59.000Z

320

Understanding of catalytic behaviors of TiO2/CuOx catalysts  

SciTech Connect (OSTI)

Aiming to reveal the catalysis at the metal-oxide and oxide-oxide interfaces,1,2 the water-gas shift reaction (WGS, CO + H2O and #61664; CO2 + H2) and CO oxidation (2CO + O2 and #61664; 2CO2) at the interface of the Cu(111) and Cu2O(111) supported TiO2 clusters were studied based on DFT calculations

Kim H. Y.; Liu, P.

2013-09-08T23:59:59.000Z

Note: This page contains sample records for the topic "bermuda cu cuba" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

DISSERTATION Role of the Cu-O Defect in CdTe Solar Cells  

E-Print Network [OSTI]

OF THE CU-O DEFECT COMPLEX IN CDTE SOLAR CELLS Thin-film CdTe is one of the leading materials used the defects present in thin-film CdTe deposited for solar cells. One key defect seen in the thin-film CdDISSERTATION Role of the Cu-O Defect in CdTe Solar Cells Submitted by Caroline R. Corwine

Sites, James R.

322

Theoretical Survey of the Potential Energy Surface of Ethylenediamine + Cu+ Reactions  

Science Journals Connector (OSTI)

Theoretical Survey of the Potential Energy Surface of Ethylenediamine + Cu+ Reactions ... The structures of the different local minima (species 4?17) and transition states located in the PES will not be discussed in detail, but they will be schematized in the energy profiles of Figures 2?7 and are given as Supporting Information together with their corresponding total energies. ... The dark blue circle denotes N atoms, green circles C atoms and light blue circles Cu atom. ...

Manuel Alcam; Alberto Luna; Otilia M; Manuel Yez; Jeanine Tortajada

2004-09-09T23:59:59.000Z

323

Pion Interferometry in Au+Au and Cu+Cu Collisions at sqrt sNN = 62.4 and 200 GeV  

SciTech Connect (OSTI)

We present a systematic analysis of two-pion interferometry in Au+Au collisions at {radical}sNN = 62.4 GeV and Cu+Cu collisions at {radical}sNN = 62.4 and 200 GeV using the STAR detector at RHIC. The multiplicity and transverse momentum dependences of the extracted correlation lengths (radii) are studied. The scaling with charged particle multiplicity of the apparent system volume at final interaction is studied for the RHIC energy domain. The multiplicity scaling of the measured correlation radii is found to be independent of colliding system and collision energy.

STAR Collaboration; Abelev, B.I.

2009-08-24T23:59:59.000Z

324

Effect of arc discharge on wear rate of Cu-impregnated carbon strip in unlubricated sliding against Cu trolley under electric current  

Science Journals Connector (OSTI)

The wear of contact strip on the pantograph of electric railway vehicle is mainly governed by arc discharge occurring simultaneously with contact break between strip and trolley wire. Sliding wear tests were carried out under electric current for the combination of Cu-impregnated baked carbon strip and Cu trolley at a sliding speed of 100 km/h. Voltage drop and current were measured at a frequency of 48 kHz and electric power, total time duration and accumulated energy of discharge were evaluated for each test strip. Plot of wear rate of strip against arc discharge energy shows a proportional relationship between them.

Shunichi Kubo; Koji Kato

1998-01-01T23:59:59.000Z

325

Influence of preparation methods and Zr and Y promoters on Cu/ZnO catalysts used for methanol steam reforming  

Science Journals Connector (OSTI)

Binary Cu/ZnO catalysts were prepared using three different methods (coprecipitation, sequential precipitation and homogeneous precipitation) and tested in a methanol steam reforming reaction. Zirconium and yttrium were tested as promoters, and their effects were evaluated in the same reaction. The studied preparation methods influenced the surface area of the Cu-based catalysts and consequently their catalytic activity; however, we verified that surface area was not the only factor influencing activity. Different structural changes in the aurichalcite precursor resulted from the different preparation methods used, and these differences were also observed in the reduced catalysts. An expansion of the Cu lattice with an increase in microstrain were identified and attributed to the formation of a CuZn alloy. Based on the correlation found between these structural changes and the catalytic activity, the CuZn alloy was proposed as active site. We concluded that the preparation methods used influenced Cu dispersion and overall catalyst structure, and CuZn alloy formation resulted from the incorporation of Zn atoms into the Cu lattice. This influence was more pronounced in the catalysts prepared by homogeneous precipitation and coprecipitation. The yttrium promoter did not provide textural or structural advantages. In contrast, the incorporation of Zr promoted both greater Cu dispersion and structural changes in the Cu lattice.

S.G. Sanches; J. Huertas Flores; R.R. de Avillez; M.I. Pais da Silva

2012-01-01T23:59:59.000Z

326

Preparation of Cu/ZnO/Al2O3 catalyst for a micro methanol reformer  

Science Journals Connector (OSTI)

A Cu/ZnO/Al2O3 catalyst suitable for low-temperature methanol reforming is proposed. The catalyst achieved by optimization of the temperature and pH of preparation and the addition of boehmite has superior catalytic activity to commercial catalysts. The catalytic activity is found to depend on the Cu surface area, which is related to the amount of Cu dispersed within ZnO. Dispersion of Cu is promoted by precipitation at low temperature, which results in the formation of small crystallites of the precursor. Enlarged BET surface area by the addition of boehmite as the third component derives high catalytic activity. Under optimized pH, it is predicted that the excess of Cu species existing as amorphous-like malachite in the precursor, in addition to aurichalcite, facilitates the dispersion of Cu. The proposed catalyst system can achieve methanol reforming at temperatures 2025C lower than conventional catalysts, representing an improved source of H2 for small proton exchange membrane fuel cell systems.

Yoshihiro Kawamura; Kazuto Yamamoto; Naotsugu Ogura; Takashi Katsumata; Akira Igarashi

2005-01-01T23:59:59.000Z

327

The Different Impacts of SO2 and SO3 on Cu/zeolite SCR Catalysts  

SciTech Connect (OSTI)

The different impacts of SO{sub 2} and SO{sub 3} on Cu/zeolite SCR catalysts were investigated by SCR performance tests and multiple characterization techniques including temperature programmed desorption (TPD), X-ray photoelectron spectroscopy (XPS) and X-ray absorption fine structure (XAFS). The results indicate that a larger amount of highly dispersed CuSO{sub 4} formed in the zeolite catalysts (Z-CuSO{sub 4}) upon SO{sub 3} poisoning, explaining the much more significant deactivation of the Cu/zeolite catalysts that were exposed to SO{sub 3} compared to poisoning by SO{sub 2}. This paper provides the first demonstration that active sites of Cu/zeolite SCR catalysts involved in the storage and removal of sulfur can react with SO{sub 2} and SO{sub 3} in very different ways. In particular, the significant differences in the extent of sulfur uptake account for the considerably different impacts of SO{sub 2} and SO{sub 3} poisoning on the performance of Cu/zeolite SCR catalysts.

Cheng, Y.; Lambert, C; Kim, D; Kwak, J; Cho, S; Peden, C

2010-01-01T23:59:59.000Z

328

Solvent-dependent luminescent Cu(I) framework based on 5-(4-pyridyl)tetrazole  

SciTech Connect (OSTI)

A new Cu(IOTA) coordination compound, Cu{sub 4}(L){sub 4}.2EtOH (1), has been obtained from the solvothermal reaction of CuBr, HL (L=5-(4-pyridyl) tetrazole), EtOH and NH{sub 3}.H{sub 2}O. The structure determination reveals that 1 has a 2D network, where each Cu(I) atom adopts a trigonal coordination mode. The 2D networks stacked in an ABAB sequence through the pi-pi interaction to form a 3D supramolecular framework, giving a 1D channel along the b-axis. The TGA and powder XRD measurements reveal that the framework is stable after removal of the guest molecules. Gas (N{sub 2}) adsorption measurement was carried out for the framework. Framework 1 shows II sorption profile with N{sub 2}, which indicates that N{sub 2} molecules cannot diffuse into the micropore and only surface adsorption occurs. The photoluminescent research shows that compound 1 displays an interesting solvent-dependent luminescence. - Abstract: A new Cu(I) compound, Cu{sub 4}(L){sub 4}.2EtOH (1) (L=5-(4-pyridyl) tetrazole), was synthesized under solvothermal method, which displays an interesting solvent-dependent luminescence. Display Omitted

Wang Fei; Yu Rongmin; Zhang Qisheng; Zhao Zhenguo; Wu Xiaoyuan; Xie Yiming; Qin Li; Chen Shanci [State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 35002 (China); Lu Canzhong, E-mail: czlu@fjirsm.ac.c [State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 35002 (China)

2009-09-15T23:59:59.000Z

329

CuO nanostructures: Synthesis, characterization, growth mechanisms, fundamental properties, and applications  

Science Journals Connector (OSTI)

Abstract Nanoscale metal oxide materials have been attracting much attention because of their unique size- and dimensionality-dependent physical and chemical properties as well as promising applications as key components in micro/nanoscale devices. Cupric oxide (CuO) nanostructures are of particular interest because of their interesting properties and promising applications in batteries, supercapacitors, solar cells, gas sensors, bio sensors, nanofluid, catalysis, photodetectors, energetic materials, field emissions, superhydrophobic surfaces, and removal of arsenic and organic pollutants from waste water. This article presents a comprehensive review of recent synthetic methods along with associated synthesis mechanisms, characterization, fundamental properties, and promising applications of CuO nanostructures. The review begins with a description of the most common synthetic strategies, characterization, and associated synthesis mechanisms of CuO nanostructures. Then, it introduces the fundamental properties of CuO nanostructures, and the potential of these nanostructures as building blocks for future micro/nanoscale devices is discussed. Recent developments in the applications of various CuO nanostructures are also reviewed. Finally, several perspectives in terms of future research on CuO nanostructures are highlighted.

Qiaobao Zhang; Kaili Zhang; Daguo Xu; Guangcheng Yang; Hui Huang; Fude Nie; Chenmin Liu; Shihe Yang

2014-01-01T23:59:59.000Z

330

Spray Deposition of High Quality CuInSe2 and CdTe Films: Preprint  

SciTech Connect (OSTI)

A number of different ink and deposition approaches have been used for the deposition of CuInSe2 (CIS), Cu(In,Ga)Se2 (CIGS), and CdTe films. For CIS and CIGS, soluble precursors containing Cu, In, and Ga have been developed and used in two ways to produce CIS films. In the first, In-containing precursor films were sprayed on Mo-coated glass substrates and converted by rapid thermal processing (RTP) to In2Se3. Then a Cu-containing film was sprayed down on top of the In2Se3 and the stacked films were again thermally processed to give CIS. In the second approach, the Cu-, In-, and Ga-containing inks were combined in the proper ratio to produce a mixed Cu-In-Ga ink that was sprayed on substrates and thermally processed to give CIGS films directly. For CdTe deposition, ink consisting of CdTe nanoparticles dispersed in methanol was prepared and used to spray precursor films. Annealing these precursor films in the presence of CdCl2 produced large-grained CdTe films. The films were characterized by x-ray diffraction (XRD) and scanning electron microscopy (SEM). Optimized spray and processing conditions are crucial to obtain dense, crystalline films.

Curtis, C. J.; van Hest, M.; Miedaner, A.; Leisch, J.; Hersh, P.; Nekuda, J.; Ginley, D. S.

2008-05-01T23:59:59.000Z

331

CuOPAA hybrid films: Chemical synthesis and supercapacitor behavior  

Science Journals Connector (OSTI)

We report the synthesis of CuOPoly (acrylic) acid (PAA) hybrid thin films by a cost-effective spin coating technique for supercapacitor application. Coated films were annealed at 300, 400 and 500C, to study the annealing effect on the supercapacitor behavior. Further films were characterized by X-ray diffractometer (XRD), X-ray photoelectron spectroscopy (XPS), Fourier transform-Raman spectroscopy (FT-Raman) and Fourier transform-Infrared spectroscopy (FT-IR) techniques. Energy dispersive spectroscopy (EDS) shows the formation of amorphous blend of CuO and Cu2O phases at 300C. Further, films annealed at 400 and 500C exhibit polycrystalline phase pure CuO with monoclinic structure. The scanning electron microscopy (SEM) micrographs show the transition of island-like structure to CuO crystals surrounded by PAA grafted composite ring with increase in annealing temperature. The possible growth mechanism of PAA and CuO bonding is discussed. Cyclic voltammetry (CV) is employed to calculate the specific capacitance (Csp) in 1M H2SO4 electrolyte. It is observed that the Csp increases from 41 to136Fg?1 with increase in annealing temperature.

J.S. Shaikh; R.C. Pawar; A.V. Moholkar; J.H. Kim; P.S. Patil

2011-01-01T23:59:59.000Z

332

Enhanced thermoelectric performance in Cd doped CuInTe{sub 2} compounds  

SciTech Connect (OSTI)

CuIn{sub 1?x}Cd{sub x}Te{sub 2} materials (x?=?0, 0.02, 0.05, and 0.1) are prepared using melting-annealing method and the highly densified bulk samples are obtained through Spark Plasma Sintering. The X-ray diffraction data confirm that nearly pure chalcopyrite structures are obtained in all the samples. Due to the substitution of Cd at In sites, the carrier concentration is greatly increased, leading to much enhanced electrical conductivity and power factor. The single parabolic band model is used to describe the electrical transport properties of CuInTe{sub 2} and the low temperature Hall mobility is also modeled. By combing theoretical model and experiment data, the optimum carrier concentration in CuInTe{sub 2} is proposed to explain the greatly enhanced power factors in the Cd doped CuInTe{sub 2}. In addition, the thermal conductivity is reduced by extra phonon scattering due to the atomic mass and radius fluctuations between Cd and In atoms. The maximum zTs are observed in CuIn{sub 0.98}Cd{sub 0.02}Te{sub 2} and CuIn{sub 0.9}Cd{sub 0.1}Te{sub 2} samples, which are improved by over 100% at room temperature and around 20% at 600?K.

Cheng, N. [State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050 (China); CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050 (China); University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing 100049 (China); Liu, R. [State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050 (China); Bai, S. [CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050 (China); Shi, X., E-mail: xshi@mail.sic.ac.cn; Chen, L. [State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050 (China); CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050 (China)

2014-04-28T23:59:59.000Z

333

Metallic glass alloys of Zr, Ti, Cu and Ni  

DOE Patents [OSTI]

At least quaternary alloys form metallic glass upon cooling below the glass transition temperature at a rate less than 10.sup.3 K/s. Such alloys comprise titanium from 19 to 41 atomic percent, an early transition metal (ETM) from 4 to 21 atomic percent and copper plus a late transition metal (LTM) from 49 to 64 atomic percent. The ETM comprises zirconium and/or hafnium. The LTM comprises cobalt and/or nickel. The composition is further constrained such that the product of the copper plus LTM times the atomic proportion of LTM relative to the copper is from 2 to 14. The atomic percentage of ETM is less than 10 when the atomic percentage of titanium is as high as 41, and may be as large as 21 when the atomic percentage of titanium is as low as 24. Furthermore, when the total of copper and LTM are low, the amount of LTM present must be further limited. Another group of glass forming alloys has the formula (ETM.sub.1-x Ti.sub.x).sub.a Cu.sub.b (Ni.sub.1-y Co.sub.y).sub.c wherein x is from 0.1 to 0.3, y.cndot.c is from 0 to 18, a is from 47 to 67, b is from 8 to 42, and c is from 4 to 37. This definition of the alloys has additional constraints on the range of copper content, b.

Lin, Xianghong (Pasadena, CA); Peker, Atakan (Pasadena, CA); Johnson, William L. (Pasadena, CA)

1997-01-01T23:59:59.000Z

334

Modeling Cu Migration in CdTe Solar Cells Under Device-Processing and Long-Term Stability Conditions: Preprint  

SciTech Connect (OSTI)

An impurity migration model for systems with material interfaces is applied to Cu migration in CdTe solar cells. In the model, diffusion fluxes are calculated from the Cu chemical potential gradient. Inputs to the model include Cu diffusivities, solubilities, and segregation enthalpies in CdTe, CdS and contact materials. The model yields transient and equilibrium Cu distributions in CdTe devices during device processing and under field-deployed conditions. Preliminary results for Cu migration in CdTe photovoltaic devices using available diffusivity and solubility data from the literature show that Cu segregates in the CdS, a phenomenon that is commonly observed in devices after back-contact processing and/or stress conditions.

Teeter, G.; Asher, S.

2008-05-01T23:59:59.000Z

335

Modeling Cu Migration in CdTe Solar Cells Under Device-Processing and Long-Term Stability Conditions (Poster)  

SciTech Connect (OSTI)

An impurity migration model for systems with material interfaces is applied to Cu migration in CdTe solar cells. In the model, diffusion fluxes are calculated from the Cu chemical potential gradient. Inputs to the model include Cu diffusivities, solubilities, and segregation enthalpies in CdTe, CdS and contact materials. The model yields transient and equilibrium Cu distributions in CdTe devices during device processing and under field-deployed conditions. Preliminary results for Cu migration in CdTe PV devices using available diffusivity and solubility data from the literature show that Cu segregates in the CdS, a phenomenon that is commonly observed in devices after back-contact processing and/or stress conditions.

Teeter, G.; Asher, S.

2008-05-01T23:59:59.000Z

336

Correlation between \\{Y2BaCuO5\\} (211) phase and superconducting magnetic properties in Ag-doped melt textured growth (MTG) YBa2Cu3O7?x superconductors  

Science Journals Connector (OSTI)

Samples of YBa2Cu3O7?x with different amount of Ag addition were prepared by the melt textured growth (MTG) process. The hysteresis and irreversible behaviour have been examined. It is found that the critical current density Jc is reduced and the irreversibility line is degenerated by doping Ag into YBa2Cu3O7?x. The microstructure analyses reveal that the volume fraction of \\{Y2BaCuO5\\} (211 Phase) decreases with increasing Ag concentration. This indicates that Ag doping can not intrinsically improve the Jc of YBa2Cu3O7?x superconductors.

J.A. Xia; H.T. Ren; Y. Zhao; C. Andrikidis; H.K. Liu; S.X. Dou

1994-01-01T23:59:59.000Z

337

Measurement of electrons from heavy-flavor decays from $p$+$p$, $d$+Au, and Cu+Cu collisions in the PHENIX experiment  

E-Print Network [OSTI]

Charm and bottom quarks are formed predominantly by gluon fusion in the initial hard scatterings at RHIC, making them good probes of the full medium evolution. Previous measurements at RHIC have shown large suppression and azimuthal anisotropy of open heavy-flavor hadrons in Au+Au collisions at $\\sqrt{s_{NN}}=200~{\\rm GeV}$. Explaining the simultaneously large suppression and flow of heavy quarks has been challenging. To further understand the heavy-flavor transport in the hot and dense medium, it is imperative to also measure cold nuclear matter effects which affect the initial distribution of heavy quarks as well as the system size dependence of the final state suppression. In this talk, new measurements by the PHENIX collaboration of electrons from heavy-flavor decays in $p$+$p$, $d$+Au, and Cu+Cu collisions at $\\sqrt{s_{NN}}=200~{\\rm GeV}$ are presented. In particular, a surprising enhancement of intermediate transverse momentum heavy-flavor decay leptons in $d$+Au at mid and backward rapidity are also seen in mid-central Cu+Cu collisions. This enhancement is much larger than the expectation from anti-shadowing of the parton distributions and is theoretically unexplained.

Sanghoon Lim

2014-08-18T23:59:59.000Z

338

Dynamic Cu/Zn Interaction in SiO2 Supported Methanol Synthesis Catalysts Unraveled by in Situ XAFS  

Science Journals Connector (OSTI)

Fujitani et al.(15) already observed that formation of an intimately mixed Cu/Zn/carbonate aurichalcite phase during the preparation stage enhanced the creation of a CuZn alloy, which they identified as the main active site in methanol synthesis after calcination and reduction. ... method through a precursor of aurichalcite is ascribed to both improvements in the Cu surface area and the specific activity. ...

Didier Grandjean; Vladimir Pelipenko; Erdni D. Batyrev; Johannes C. van den Heuvel; Alexander A. Khassin; Tamara. M. Yurieva; Bert M. Weckhuysen

2011-08-30T23:59:59.000Z

339

DISSERTATION IMPACT OF SECONDARY BARRIERS ON CuIn1-xGaxSe2 SOLAR-CELL  

E-Print Network [OSTI]

Impact of Secondary Barriers on CuIn1-xGaxSe2 Solar-Cell Operation Thin-film solar cells based on CuInSe2 of thin-film solar-cell tandems. Since the bottom cells are exposed to practically only "red" photonsDISSERTATION IMPACT OF SECONDARY BARRIERS ON CuIn1-xGaxSe2 SOLAR-CELL OPERATION Submitted by Alexei

Sites, James R.

340

The Roles of Cu Impurity States in CdTe Thin Film Solar Cells Ken K. Chin1  

E-Print Network [OSTI]

1 The Roles of Cu Impurity States in CdTe Thin Film Solar Cells Ken K. Chin1 , T.A. Gessert2 of Cu impurity inclusion in CdTe thin film solar cells, such as degradation caused by Cu diffusion , and Su-Huai Wei2 1 Department of Physics and Apollo CdTe Solar Energy Research Center, NJIT, Newark, NJ

Note: This page contains sample records for the topic "bermuda cu cuba" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Plastic deformation in Al (Cu) interconnects stressed by electromigration and studied by synchrotron polychromatic X-ray microdiffraction  

E-Print Network [OSTI]

Plastic deformation in Al (Cu) interconnects stressed bygrain orientation [7], study plastic deformation [12-15] andThis aspect of EM-induced plastic deformation in grains

Chen, Kai; Advanced Light Source; UCLA

2008-01-01T23:59:59.000Z

342

Electroslag surfacing of steel shafting with Ni alloy 625 and 70Cu-30Ni strip  

SciTech Connect (OSTI)

A comprehensive study of electroslag surfacing (ESS) of steel with Ni Alloy 625 and 70Cu-30Ni strip electrodes was conducted to establish the feasibility of replacing forged bearing sleeves on propulsion shafting with integral weld surfacing. The base material was MIL-S-23284, Class 1 steel in the form of 41--66 cm (16--26 in.) diameter shafting and 76 mm (3 in.) thick flat plate. All ESS was carried out at a heat input level of approximately 5.9kJ/mm (150 kJ/in.) using 30 x 0.5 mm (1.2 x 0.02 in.) strip electrodes. Assessments of mechanical properties and microstructure of Ni Alloy 625 surfacing and 70Cu-30Ni surfacing were conducted to establish the structure-property relationships in these complex alloy systems. In addition, a solidification cracking test was developed to determine the relative cracking susceptibilities of these strip surfacing alloys. Although the Ni Alloy 625 surfacing contained small islands of interdendritic MC type carbides and Laves phase, the mechanical properties of this surfacing were satisfactory. The 70Cu-30Ni surfacing required a buttering layer of 30Cu-70Ni or pure Ni to prevent solidification cracking. The inherent ductility-dip sensitivity of 70Cu-30Ni surfacing was overcome by the development of a suitable ESS procedure.

Devletian, J.H.; Gao, Y.P.; Wood, W.E. [Oregon Graduate Inst. of Science and Technology, Portland, OR (United States)

1996-12-31T23:59:59.000Z

343

CuAl{sub 2} revisited: Composition, crystal structure, chemical bonding, compressibility and Raman spectroscopy  

SciTech Connect (OSTI)

The structure of CuAl{sub 2} is usually described as a framework of base condensed tetragonal antiprisms [CuAl{sub 8/4}]. The appropriate symmetry governed periodic nodal surface (PNS) divides the space of the structure into two labyrinths. All atoms are located in one labyrinth, whereas the second labyrinth seems to be 'empty'. The bonding of the CuAl{sub 2} structure was analyzed by the electron localization function (ELF), crystal orbital Hamiltonian population (COHP) analysis and Raman spectroscopy. From the ELF representation it is seen, that the 'empty' labyrinth is in fact the place of important covalent interactions. ELF, COHP in combination with high-pressure X-ray diffraction and Raman spectroscopy show that the CuAl{sub 2} structure is described best as a network built of interpenetrating graphite-like nets of three-bonded aluminum atoms with the copper atoms inside the tetragonal-antiprismatic cavities. - Graphical abstract: Atomic interactions in the crystal structure of the intermetallic compound CuAl{sub 2}: Three-bonded aluminum atoms form interpenetrating graphite-like nets. The copper atoms are located in the channels of aluminum network by means of three-center bonds. The bonding model is in agreement with the result of polarized Raman spectroscopy and high-pressure X-ray powder diffraction.

Grin, Yuri [Max-Planck-Institut fuer Chemische Physik fester Stoffe, Noethnitzer Strasse 40, 01187 Dresden (Germany)]. E-mail: grin@cpfs.mpg.de; Wagner, Frank R. [Max-Planck-Institut fuer Chemische Physik fester Stoffe, Noethnitzer Strasse 40, 01187 Dresden (Germany); Armbruester, Marc [Max-Planck-Institut fuer Chemische Physik fester Stoffe, Noethnitzer Strasse 40, 01187 Dresden (Germany); Kohout, Miroslav [Max-Planck-Institut fuer Chemische Physik fester Stoffe, Noethnitzer Strasse 40, 01187 Dresden (Germany); Leithe-Jasper, Andreas [Max-Planck-Institut fuer Chemische Physik fester Stoffe, Noethnitzer Strasse 40, 01187 Dresden (Germany); Schwarz, Ulrich [Max-Planck-Institut fuer Chemische Physik fester Stoffe, Noethnitzer Strasse 40, 01187 Dresden (Germany); Wedig, Ulrich [Max-Planck-Institut fuer Festkoerperforschung, Heisenbergstr. 1, 70569 Stuttgart (Germany); Georg von Schnering, Hans [Max-Planck-Institut fuer Festkoerperforschung, Heisenbergstr. 1, 70569 Stuttgart (Germany)

2006-06-15T23:59:59.000Z

344

Ab initio cluster studies of La sub 2 CuO sub 4  

SciTech Connect (OSTI)

In this paper we examine the properties of small cluster models of La{sub 2}CuO{sub 4}. In Section 2, the Madelung/Pauli background potential used to imbed the primary cluster and the basis sets used to expand the cluster wavefunction are discussed. Section 3 presents the results of calculations on CuO{sub 6} in which the optical absorption and the photoemission spectrum are examined. The calculation on CuO{sub 6} and our earlier work on larger clusters suggest that a single-band Pariser-Parr-Pople (PPP) model be developed. Therefore, in Section 4 the PPP model and extensions which relax the zero-differential-overlap (ZDO) approximation upon which it is based are reviewed. Calculations on the states of Cu{sub 2}O{sub 7} necessary to parameterize the PPP model are presented in Section 5 and compared with analogous calculations for Cu{sub 2}O{sub 11}. Section 6 discusses the problems associated with the direct ab initio determination of the anti-ferromagnetic exchange interaction, examines the magnitudes of the occupation-dependent hopping and direct exchange interactions which arise when the ZDO approximation is relaxed, and provides estimates of the uncertainties in the parameters due to electron correlation and polarization effects not recoverable with the present basis sets and finite clusters. A comparison of the parameters with those extracted from constrained LDF theory concludes Section 6. Finally, Section 7 summarizes the conclusions of this research.

Martin, R.L.

1991-01-01T23:59:59.000Z

345

Structure and Bonding of Tungsten Oxide Clusters on Nanostructured Cu-O Surfaces  

SciTech Connect (OSTI)

(WO3)3 gas-phase clusters generated via vacuum sublimation are deposited under UHV and low temperature (5 K) conditions on a Cu(110) 'stripe' phase consisting of alternating Cu-O (2x1) and clean Cu regions. STM imaging shows that the clusters adsorb as intact units on both substrates, and the suggested adsorption geometries are confirmed by density-functional (DF) simulations. On the clean surface the overall distortion is minor and we are able to image the nodal structure of an individual molecular orbital in the STM at low bias, whereas on the Cu-O surface both the clusters and the substrate are significantly distorted, due to the strong oxygen affinity of W atoms. On both surfaces cluster and Cu electronic states are appreciably mixed, and electron charge is donated by the surface to the cluster. The experimentally STS-determined DOS signature of the adsorption complex consists in two peaks across the Fermi energy and is well reproduced by the DF calculations.

Wagner, Margareta; Surnev, Svetlozar; Ramsey, Michael; Barcaro, Giovanni; Sementa, Luca; Negreiros, Fabio R.; Fortunelli, Alessandro; Dohnalek, Zdenek; Netzer, Falko P.

2011-12-01T23:59:59.000Z

346

Density functional study of CaN mono and bilayer on Cu(001)  

SciTech Connect (OSTI)

Density functional - pseudopotential calculations are performed to provide first-principles insights into magnetic behaviour of bulk CaN and CaN monolayers on Cu(001) in the rock-salt (RS) and zinc-blende (ZB) structures. Our results indicate that both RS- and ZB-CaN exhibit half-metallic ferromagnetism originated from the incomplete 2p shell of the nitrogen ion. In contrast to the bulk CaN, the CaN monolayers on Cu(001) generally favor ZB structure. We argue that the more stable ZB-CaN thin films on Cu(001) are nonmagnetic, because of strong Cu-N bonding at the interface, while the less stable Ca terminated ZB-CaN thin films exhibit half-metallic ferromagnetism. The transition path between the high energy ferromagnetic and the stable nonmagnetic configurations of the ZB-CaN monolayer on Cu(001) are studied by using the nudged elastic band method. We observe a two stages transition and an activation barrier of about 1.18 eV in the minimum energy path of this transition.

Zahedifar, Maedeh; Hashemifar, S. Javad, E-mail: hashemifar@cc.iut.ac.ir; Akbarzadeh, Hadi [Department of Physics, Isfahan University of Technology, Isfahan, 84156-83111 (Iran, Islamic Republic of)] [Department of Physics, Isfahan University of Technology, Isfahan, 84156-83111 (Iran, Islamic Republic of)

2014-01-15T23:59:59.000Z

347

Supercapacitor behavior of CuOPAA hybrid films: Effect of PAA concentration  

Science Journals Connector (OSTI)

The Cupoly(acrylic) acid (PAA) thin films were deposited at room temperature by a simple and cost effective polymer assisted deposition (PAD) method. The solution containing Cu salt and PAA was spin coated to yield the thin films with desired properties. The CuPAA films were annealed at 400C in ambient air for 4h to obtain CuOPAA phase. The effect of PAA concentration on the film properties is studied and characterized by employing various techniques. The structural and surface morphological studies are carried out using X-ray diffraction (XRD) and scanning electron microscope (SEM) respectively. Fourier transform infrared spectroscopy (FT-IR) and FT-Raman spectroscopy are employed to investigate the hybrid film formation. Wetting behavior is studied by measuring the contact angle of water on the film surface. Cyclic voltammetry (CV) studies were carried out to investigate the specific capacitance of CuOPAA films in aqueous 1M H2SO4 electrolyte. Hybrid films deposited with 2mM PAA exhibits highest specific capacitance of 65Fg?1.

J.S. Shaikh; R.C. Pawar; N.L. Tarwal; D.S. Patil; P.S. Patil

2011-01-01T23:59:59.000Z

348

Microstructural and magnetic characterizations of CoFeCu electrodeposited in self-assembled mesoporous silicon  

Science Journals Connector (OSTI)

Abstract Self-assembled mesoporous silicon with quasi-regular pore arrangements has been fabricated by the electrochemical anodization process in hydrofluoric acid solution. CoFeCu was electrodeposited in this structure from a bath containing sodium acetate as a complexing agent with a pH value of 5. The effect of current density on the morphology, the structure and the magnetic properties of CoFeCu deposit was studied by SEM, EDS, DRX and VSM. It has been shown that the morphology and structure of samples were strongly influenced by the current density and etching duration. The micrographs show the vertical and branched nanowires and also a discontinuous growth of wires. Further, the growth of a thick layer from the grain boundaries of released CoFeCu wires is produced. The magnetic hysteresis loops demonstrate that the CoFeCu nanowires exhibit easy magnetic axis perpendicular to the PS channels axis when the current density varied from 3 to 10mA/cm2. Nevertheless, they reveal a no magnetic anisotropy of CoFeCu nanostructures deposited only in the outside of porous silicon, probably due to the vanishing the shape anisotropy.

G. Fortas; N. Haine; S. Sam; N. Gabouze; A. Saifi; S. Ouir; H. Menari

2015-01-01T23:59:59.000Z

349

Critical current density of Y-Ba-Cu oxide superconductor prepared by a diffusion process  

SciTech Connect (OSTI)

The formation of the YBa/sub 2/Cu/sub 3/O/sub 7-y/ layer has been investigated by a diffusion process as a basic research for high-T/sub c/ superconductor fabrication. The starting materials were Y/sub 2/BaCuO/sub 5/ and barium cuprate, unlike the ordinary sintering technique. A dense layer of YBa/sub 2/Cu/sub 3/O/sub 7-y/ was formed on Y/sub 2/BaCuO/sub 5/ substrate, and the starting barium cuprate layer was fully converted to the superconducting oxide. X-ray diffractometry revealed that the layer consisted of an orthorhombic crystal structure. The reacted specimens showed good superconductivity. A zero resistance of 91.5K and the critical current density of 1900A/cm/sup 2/ (77K, OT) were achieved in the layer. Preparation conditions and superconducting properties, particularly, Jc characteristics are investigated. The diffusion phenomena to form the YBa/sub 2/Cu/sub 3/O/sub 7-y/ phase by this diffusion process are also discussed.

Sadakata, N.; Sugimoto, M.; Kohno, O.; Tachikawa, K.

1989-03-01T23:59:59.000Z

350

Application Of Ti-Based Self-Formation Barrier Layers To Cu Dual-Damascene Interconnects  

SciTech Connect (OSTI)

Cu interconnects have been used extensively in ULSI devices. However, large resistance-capacitance delay and poor device reliability have been critical issues as the device feature size has reduced to nanometer scale. In order to achieve low resistance and high reliability of Cu interconnects, we have applied a thin Ti-based self-formed barrier (SFB) using Cu(Ti) alloy seed to 45nm-node dual damascene interconnects and evaluated its performance. The line resistance and via resistance decreased significantly, compared with those of conventional Ta/TaN barriers. The stress migration performance was also drastically improved using the SFB process. A performance of time dependent dielectric breakdown revealed superior endurance. These results suggest that the Ti-based SFB process is one of the most promising candidates for advanced Cu interconnects. TEM and X-ray photoelectron spectroscopy observations for characterization of the Ti-based SFB structure were also performed. The Ti-based SFB consisted of mainly amorphous Ti oxides. Amorphous or crystalline Ti compounds such as TiC, TiN, and TiSi formed beneath Cu alloy films, and the formation varied with dielectric.

Ito, Kazuhiro; Kohama, Kazuyuki [Department of Materials Science and Engineering, Kyoto University, Kyoto 606-8501 (Japan); Ohmori, Kazuyuki; Mori, Kenichi; Maekawa, Kazuyoshi; Asai, Koyu [Process Technology Div., Renesas Electronics Corporation, Hitachinaka, Ibaraki 312-8504 (Japan); Murakami, Masanori [The Ritsumeikan Trust, Nakagyo-ku, Kyoto 604-8520 (Japan)

2010-11-24T23:59:59.000Z

351

A bifunctional adsorbent with high surface area and cation exchange property for synergistic removal of tetracycline and Cu2+  

Science Journals Connector (OSTI)

Abstract A novel bifunctional adsorbent with high surface area and cation exchange character (HAR-2) was prepared via copolymerization and hydrolysis reactions for the coremoval of tetracycline and Cu2+. HAR-2 possessed large specific surface area of 394m2/g and high weak cation exchange capacity of 1.06meq/g. The adsorption kinetics of TC or Cu2+ fitted both pseudo-first-order and pseudo-second order equations in single-substrate solution, whereas the adsorption kinetics were better described by pseudo-second order model in binary solutions. The adsorption of TC was an exothermic process, while the Cu2+ adsorption process was endothermic. The adsorption isotherms of TC and Cu2+ fitted the Langmuir model, suggesting a monolayer adsorption process. The adsorbed amount of TC was pronouncedly enhanced in the presence of Cu2+ due to the formation of tertiary surface complex HARCu2+TC. Likewise, the adsorption of Cu2+ was significantly improved by forming HARTCCu2+ complex in the presence of TC. The uptake of Cu2+ increased as pH increased, while the adsorbed amount of TC increased as pH rose from 2 to 3 but decreased when pH was further elevated from 3 to 6. The presence of NaCl exerted no significant influence on the adsorption of TC and negatively affected the adsorption of Cu2+. HAR-2 exhibited high stability over 5 repeated uses, only losing 6.3% and 18.4% of the initial adsorption capacity for TC and Cu2+, respectively.

Yan Ma; Qing Zhou; Sicong Zhou; Wei Wang; Jing Jin; Jiawen Xie; Aimin Li; Chendong Shuang

2014-01-01T23:59:59.000Z

352

Neutron Scattering Studies on Magnetism and Phonon in the Electron-doped Nd2-xCexCuO4 and Pr1-xLaCexCuO4.  

E-Print Network [OSTI]

??We present comprehensive neutron scattering studies on the electron-doped superconductors Nd2-xCexCuO4 and Pr1-xLaCexCuO4 to understand how magnetic properties and phonon are related to superconductivity. For (more)

Kang, Hye Jung

2005-01-01T23:59:59.000Z

353

Thermoelectric properties of chalcopyrite type CuGaTe2 and chalcostibite CuSbS2 Vijay Kumar Gudelli, V. Kanchana, G. Vaitheeswaran, A. Svane, and N. E. Christensen  

E-Print Network [OSTI]

of zT ¼ 1.4, confirming that CuGaTe2 is a promising material for high temperature thermoelectric and concentration suggests that CuSbS2 will be a good thermoelectric material at low temperatures, similarly Thermoelectric (TE) materials with potential applica- tions within power generation and refrigeration have repre

Svane, Axel Torstein

354

Microstructural evolutions in converting epitaxial Tl2Ba2CaCu2Ox thin films to epitaxial HgBa2CaCu2O6+delta thin films  

E-Print Network [OSTI]

Superconducting HgBa2CaCu2O6+delta (Hg-1212) thin films were obtained from Tl2Ba2CaCu2Ox (Tl-2212) precursor films using a cation-exchange process. In this process, Tl cations on the precursor lattice were thermally excited ...

Wu, Judy; Siegal, M. P.; Xie, Y. Y.; Aytug, T.; Fang, L.

2003-02-01T23:59:59.000Z

355

Cu-Pd Hydrogen Separation Membranes with Reduced Palladium Content and Improved Performance  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Cu-Pd Hydrogen Separation Membranes with Reduced Cu-Pd Hydrogen Separation Membranes with Reduced Palladium Content and Improved Performance Opportunity This patent-pending technology, "Cu-Pd Hydrogen Separation Membranes with Reduced Palladium Content and Improved Performance," consists of copper-palladium alloy compositions for hydrogen separation membranes that use less palladium and have a potential increase in hydrogen permeability and resistance to sulfur degradation compared to currently available copper-palladium membranes. This technology is available for licensing and/or further collaborative research with the U.S. Department of Energy's National Energy Technology Laboratory. Overview NETL is working to help produce and deliver hydrogen from fossil fuels including coal in commercially applicable and environmentally

356

Stable n-CuInSe/sub 2/iodide-iodine photoelectrochemical cell  

DOE Patents [OSTI]

In a photoelectrochemical solar cell, stable output and solar efficiency in excess of 10% are achieved with a photoanode of n-CuInSe/sub 2/ electrode material and an iodine/iodide redox couple used in a liquid electrolyte. The photoanode is prepared by treating the electrode material by chemical etching, for example in Br/sub 2//MeOH; heating the etched electrode material in air or oxygen; depositing a surface film coating of indium on the electrode material after the initial heating; and thereafter again heating the electrode material in air or oxygen to oxidize the indium. The electrolyte is treated by the addition of Cu/sup +/ or Cu/sup 2 +/ salts and in In/sup 3 +/ salts.

Cahen, D.; Chen, Y.W.

1984-09-20T23:59:59.000Z

357

Iodide retention by cinnabar (HgS) and chalcocite (Cu{sub 2}S)  

SciTech Connect (OSTI)

Sorption of iodide (I{sup {minus}}) on cinnabar (HgS) and chalcocite (Cu{sub 2}S) was examined as a function of pH at 25{degrees}C in a series of batch experiments. Calculated distribution ratios (K{sub d}) far exceed those reported for other minerals; maximal K{sub d}`s of 1375 cc/g (Cu{sub 2}S) and 3080 c/g (HgS) were observed between pH 4-5, but wre substantial at all pH`s measured (4 < pH < 10). Iodide sorption apparently occurs by the formation of an insoluble surface solid solution with exposed Hg and Cu sites. Surface solid solution formation is favored at low pH due to the lessened electrostatic repulsion of the iodide ion by the sulfide surfaces.

Anderson, H.L.; Balsley, S.D.; Brady, P.V.

1995-07-01T23:59:59.000Z

358

Synthesis of CuInSe2 nanopowders by microwave assisted solvothermal method  

Science Journals Connector (OSTI)

CuInSe2 (CISe) nanopowders were synthesised using the innovative microwave assisted solvothermal method. We studied the impact of the synthesis temperature as well as the precursor composition on the morphological, compositional, and structural properties of the nanopowders. We have found that for the synthesis of stoichiometric CISe particulates with chalcopyrite phase structure, temperatures equal to 230C and In concentration in excess in the reaction solution with respect to Cu are required. At lower temperatures (200C) and In excess, the presence of binary phases such as CuxSe and In2Se3 is clearly detected indicating a inadequate In incorporation. At intermediate temperatures (215C), CISe is mainly formed but preferentially with the Cu-Au polytype structure. The method presented here may be very interesting for the possible mass production of CISe nanopowders due to the facile temperature control, the fast reaction process, and the easy scalability.

F.A. Pulgarin-Agudelo; M. Placidi; A. Fairbrother; X. Fontané; V. Izquierdo Roca; P.J. Sebastian; F. Ramos; B. Pina; A. Pérez-Rodríguez; E. Saucedo

2013-01-01T23:59:59.000Z

359

IPA-CuCl3: a S=1/2 Ladder with Ferromagnetic Rungs  

SciTech Connect (OSTI)

The spin gap material IPA-CuCl{sub 3} has been extensively studied as a ferromagnetic-antiferromagnetic bond-alternating S = 1/2 chain. This description of the system was derived from structural considerations and bulk measurements. New inelastic neutron scattering experiments reveal a totally different picture: IPA-CuCl{sub 3} consists of weakly coupled spin ladders with antiferromagnetic legs and ferromagnetic rungs. The ladders run perpendicular to the originally supposed bond-alternating chain direction. The ferromagnetic rungs make this system equivalent to a Haldane S = 1 antiferromagnet. With a gap energy of 1.17(1) meV, a zone-boundary energy of 4.1(1) meV, and almost no magnetic anisotropy, IPA-CuCl{sub 3} may be the best Haldane-gap material yet, in terms of suitability for neutron scattering studies in high magnetic fields.

Masuda, Takatsugu [ORNL] [ORNL; Zheludev, Andrey I [ORNL] [ORNL; Manaka, H. [Kagoshima University, Kagoshima JAPAN] [Kagoshima University, Kagoshima JAPAN; Chung, J.-H. [National Institute of Standards and Technology (NIST)] [National Institute of Standards and Technology (NIST)

2006-01-01T23:59:59.000Z

360

Stable N-CuInSe.sub.2 /iodide-iodine photoelectrochemical cell  

DOE Patents [OSTI]

In a photoelectrochemical solar cell, stable output and solar efficiency in excess of 10% are achieved with a photoanode of n-CuInSe.sub.2 electrode material and an iodine/iodide redox couple used in a liquid electrolyte. The photoanode is prepared by treating the electrode material by chemical etching, for example in Br.sub.2 /MeOH; heating the etched electrode material in air or oxygen; depositing a surface film coating of indium on the electrode material after the initial heating; and thereafter again heating the electrode material in air or oxygen to oxidize the indium. The electrolyte is treated by the addition of Cu.sup.+ or Cu.sup.2+ salts and In.sup.3+ salts.

Cahen, David (Rehovot, IL); Chen, Yih W. (Lakewood, CO)

1985-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "bermuda cu cuba" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Temperature sensitivity of Cu K(alpha) imaging efficiency using a spherical Bragg reflecting crystal  

SciTech Connect (OSTI)

The Vulcan laser facility at the Rutherford Appleton Laboratory was used to study the interaction of a 75 J 10 ps, high intensity laser beam with low-mass solid, Cu targets. Two instruments were fielded as diagnostics of the Cu K-shell emission from the targets: A single photon counting CCD spectrometer provided the absolute K{sub {alpha}} yield and a spherically bent Bragg crystal recorded 2D monochromatic images with a spatial resolution of 10 {micro}m. Due to the shifting and broadening of the K{sub {alpha}} spectral lines with increasing temperature, there is a temperature dependence of the crystal collection efficiency. This provides a temperature diagnostic when cross calibrated against a single hit CCD spectrometer, and it affects measurements of the spatial pattern of electron transport. The experimental data showing changing collection efficiency are presented. The results are discussed in light of modeling of the temperature-dependent spectrum of Cu K-shell emission.

Akli, K U; Key, M H; Chung, H K; Hansen, S B; Freeman, R R; Chen, M H; Gregori, G; Hatchett, S; Hey, D; Izumi, N; King, J A; Kuba, J; Norreys, P; Mackinnon, A J; Murphy, C D; Snavely, R; Stepehens, R; Stoeckel, C; Theobald, W; Zhang, B

2006-08-07T23:59:59.000Z

362

Electronic structure of La2CuO4 and YBa2Cu3O6: A local-spin-density approximation with on-site Coulomb-U correlation calculations  

Science Journals Connector (OSTI)

The electron-electron correlation has been considered by using the local-spin-density approximation (LSDA) with on-site Coulomb interaction in the first-principles discrete variational cluster method. Based on the correction to LSDA, we have carried out self-consistent electronic-structure calculations for the strongly correlated electronic systems of La2CuO4 and YBa2Cu3O6. In contrast to LSDA, the LSDA+U calculations reveal the experimentally observed antiferromagnetic and insulating ground state. The energy gap for these compounds is of a charge-transfer character, and the values of the energy gap and Cu magnetic moment are in good agreement with experiments. The orbital character of the states near the Fermi level in La2CuO4 and YBa2Cu3O6 is discussed and a comparison with experiments is made.

Pan Wei and Zheng Qing Qi

1994-05-01T23:59:59.000Z

363

Vortex-lattice activation energy deduced from irreversibility lines for (PrBa2Cu3-xGaxO7)M/(YBa2Cu3O7)N superlattices  

Science Journals Connector (OSTI)

The activation energy of the vortex structure in high anisotropic (PrBa2Cu3-xGaxO7)M/(YBa2Cu3O7)N superlattices with a layer thickness of the superconductor in the range 1.24.8 nm and with no Josephson coupling between the YBa2Cu3O7 elementary layers has been deduced from irreversibility lines Tirr(H). The activation energy is proportional to the thickness of the elementary YBa2Cu3O7 layer and to the logarithm of the field H, whereas it follows a TAFF behavior for a YBa2Cu3O7 single film. The origin of the activation energy is discussed in light of recent theories on vortex dynamic. The anisotropies deduced from both Tirr(H) and the Kosterlitz-Thouless analysis of the resistive transition are found to be strongly correlated.

D. Ravelosona, J. P. Contour, and N. Bontemps

2000-03-01T23:59:59.000Z

364

Synthesis and catalytic performance of graphene modified CuO-ZnO-Al2O3 for CO2 hydrogenation to methanol  

Science Journals Connector (OSTI)

CuO-ZnO-Al2O3 and graphene nanosheet (GNS) were synthesized by coprecipitation route and reduction of exfoliated graphite oxides method, respectively. GNS modified CuO-ZnO-Al2O3 nanocomposites were synthesized ...

Zheng-juan Liu, Xing-jiang Tang, Shan Xu, Xiao-lai Wang

2014-01-01T23:59:59.000Z

365

A comparative study on shock compression of nanocrystalline Al and Cu: Shock profiles and microscopic views of plasticity  

SciTech Connect (OSTI)

Shock compressions of nanocrystalline (nc) metals Al and Cu with the same grain size and texture are studied by using molecular dynamics simulations. Results have revealed that the shock front of both Al and Cu can be divided into three stages: elastic, grain-boundary-mediated, and dislocation-mediated plastic deformation. The transition planes among these three stages are proven to be non-planar by two-dimensional shock response analysis, including local stress, shear, temperature, and atom configuration. The difference between shocked Al and Cu is that the rise rate of the elastic stage of Cu is slightly higher than that of Al, and that the shock-front width of Al is wider than Cu at the same loading conditions. For the plastic stage, the dislocation density of shocked Al is lower than Cu, and the contribution of grain-boundary-mediated plasticity to shock front and strain for nc Al is more pronounced than for nc Cu. These results are explained through intrinsic material properties and atomistic analysis of the plastic process. In the case of the shocked Al sample, partial dislocations, perfect dislocations, and twins are observed, but few evidence of perfect dislocations and twins are observed in the shocked Cu.

Ma, Wen; Hou, Yong [Department of Physics, College of Science, National University of Defense Technology, Changsha 410073 (China)] [Department of Physics, College of Science, National University of Defense Technology, Changsha 410073 (China); Zhu, Wenjun [National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, CAEP, P.O. Box 919-111, Mianyang 621900 (China)] [National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, CAEP, P.O. Box 919-111, Mianyang 621900 (China)

2013-10-28T23:59:59.000Z

366

Stereochemistry and structural phase transition of Cu(II) complexes containing orthophosphate ions and pyridine/picoline  

Science Journals Connector (OSTI)

Copper complexes of the type Cu(L)4(H2PO4)2 designated as complex (I), and Cu(L)4 HPO4 designated as complex (II), (whereL = pyridine (py) or ?-picoline (pic)) have been synthesised, characterised by chemical ana...

M. S. Sastry; M. D. Sastry

1986-12-01T23:59:59.000Z

367

Hole transport and doping states in epitaxial CuIn1 xGaxSe2 David J. Schroeder  

E-Print Network [OSTI]

interest in renewable energy sources such as photovoltaic devices. CuIn1 xGaxSe2 CIGS /CdS hetero- junctionHole transport and doping states in epitaxial CuIn1 xGaxSe2 David J. Schroeder Motorola

Rockett, Angus

368

Optical transitions and multiphonon Raman scattering of Cu doped ZnO and MgZnO ceramics  

E-Print Network [OSTI]

of the Cu ion, Cu doped ZnO is a p-type semiconductor.13 Additionally, ferromagnetic behavior due were then dried and cold pressed at up to 3 tons for approximately 30 min, followed by annealing at a temperature of 10 K using a Bomem DA8 Fourier transform IR spectrometer and InSb detector. The micro

McCluskey, Matthew

369

THE PERFORMANCE OF THIN FILM SOLAR CELLS EMPLOYING PHOTOVOLTAIC Cu22014x Te-CdTe HETEROJUNCTIONS (1)  

E-Print Network [OSTI]

195 THE PERFORMANCE OF THIN FILM SOLAR CELLS EMPLOYING PHOTOVOLTAIC Cu22014x Te This paper is a short status report on the continuing development of Cu22014xTe-CdTe thin film solar cells Company has had a conti- nuous effort on thin film solar cells for the past four and a half years

Paris-Sud XI, Université de

370

Heterogeneous deposition of Cu2O nanoparticles on TiO2 nanotube array films in organic solvent  

Science Journals Connector (OSTI)

A novel method for decoration of anodic TiO2 nanotube array films (NAFs) with Cu2O nanoparticles has been reported. The method is based on the reduction of Cu(II) in a mixture of ethylene glycol and N, N-dimethylformamide at 120C ...

Xinwen Huang; Zongjian Liu

2013-01-01T23:59:59.000Z

371

Correlation between corrosion performance and surface wettability in ZrTiCuNiBe bulk metallic glasses  

E-Print Network [OSTI]

Correlation between corrosion performance and surface wettability in ZrTiCuNiBe bulk metallic June 2010 The corrosion properties of two Zr-based bulk metallic glass, Zr41Ti14Cu12Ni10Be23 LM1 and Zr potential, LM1b showed superior corrosion resistance to LM1. Under identical sample preparation and testing

Zheng, Yufeng

372

Effect of thin Mo2C layer on thermal stability of Si/SiO2/Ti/Cu system  

Science Journals Connector (OSTI)

The effect of introducing a thin Mo2C (30 nm) layer between Ti and Cu on the thermal stability of Si/SiO2/Ti/Cu system was studied using four-point probe (FPP), scanning electron microscopy (SEM), energy-dispersi...

C. C. Tripathi; Mukesh Kumar; Dinesh Kumar

2011-12-01T23:59:59.000Z

373

Influence of oxygen on the interfacial stability of Cu on Co,,0001... thin films Hongmei Wen,1 Matthew Neurock,1,  

E-Print Network [OSTI]

Influence of oxygen on the interfacial stability of Cu on Co,,0001... thin films Hongmei Wen,1 of oxygen, which can impact the quality of film and its properties. Previously we found that oxygen to examine the effects of surface atomic oxygen on the stability of the Cu 111 /Co 0001 interface

Wadley, Haydn

374

Parent Fund Donors, I am pleased to present the CU-Boulder Parent Fund Annual Report for Fiscal Year 2014.  

E-Print Network [OSTI]

and initiatives, the Parent Fund also served as a crucial resource in September during the Boulder flood. I canParent Fund Donors, I am pleased to present the CU-Boulder Parent Fund Annual Report for Fiscal the campus with a renewed strategic focus on student success. He has challenged CU-Boulder to increase

Stowell, Michael

375

Vacancy ordered phases in AlCuNi as average lattices Anandh Subramaniam a,*, S. Ranganathan b  

E-Print Network [OSTI]

Vacancy ordered phases in Al­Cu­Ni as average lattices Anandh Subramaniam a,*, S. Ranganathan b, Bangalore 560012, India Abstract Vacancy ordered phases (VOP) in the Al­Cu­Ni system have an arrangement. Introduction Vacancy ordered phases (VOP) in Al-TM (transition metal) systems are a special class of structures

Subramaniam, Anandh

376

Vacancy diffusion in the Cu001 surface I: an STM study R. van Gastel a,*, E. Somfai b,1  

E-Print Network [OSTI]

Vacancy diffusion in the Cuð001? surface I: an STM study R. van Gastel a,*, E. Somfai b,1 , S Abstract We have used the indium/copper surface alloy to study the dynamics of surface vacancies on the Cu, are used as probes to detect the rapid diffusion of surface vacancies. STM measurements show

van Saarloos, Wim

377

Growth, Structure, and Magnetic Properties of CuFeTe{sub 2} Single Crystals  

SciTech Connect (OSTI)

CuFeTe{sub 2} single crystals were grown and the temperature dependence of their magnetic susceptibility in the temperature range 1.8-400 K was investigated. It is found that the magnetic susceptibility shows anomalies at temperatures T{sub s} = 65 and T{sub N} = 125 K. At T > 125 K, the crystal is in the paramagnetic state controlled by Fe{sup 2+} and Cu{sup 2+} ions with an effective magnetic moment of 1.44 {mu}B.

Dzhabbarov, A.I.; Orudzhev, S.K.; Guseinov, G.G.; Gakhramanov, N.F. [Institute of Physics, Academy of Sciences of Azerbaijan, pr. Dzhavida 33, Baku, 370143 (Azerbaijan)

2004-11-01T23:59:59.000Z

378

Surface atomic structure of c(22)-Si on Cu(110)  

Science Journals Connector (OSTI)

The technological importance of Schottky barriers has led to many experiments of metal-on-semiconductor systems. Here we present an example of the inverse case by depositing a semiconductor on a metal, studying the very early stages of the metal-semiconductor interface formation. We show that 0.5 monolayers of Si on Cu(110) form an ordered c(22) overlayer and resolve its geometrical structure. Using full-hemispherical x-ray photoelectron diffraction, we find that Si atoms form an almost coplanar layer, replacing one out of two Cu surface atoms.

J. A. Martn-Gago; R. Fasel; J. Hayoz; R. G. Agostino; D. Naumovic-acute; P. Aebi; L. Schlapbach

1997-05-15T23:59:59.000Z

379

The influence of Cu doping on opto-electronic properties of chemically deposited CdS  

Science Journals Connector (OSTI)

Cadmium sulphide (CdS) thin films were deposited on glass substrate by precipitation from aqueous solution technique. The films were doped with copper using the direct method consisting in the addition of a copper salt (CuCl2) in the deposition bath of CdS. The doped films were annealed in air, at 300C, for 1 h. We report some structural, optical, electrical and photoelectrical properties of CdS thin films before and after Cu doping, correlated with investigation of trapping levels by Thermally Stimulated Currents (TSC) method.

D Petre; I Pintilie; E Pentia; I Pintilie; T Botila

1999-01-01T23:59:59.000Z

380

Electronic band structure imaging of three layer twisted graphene on single crystal Cu(111)  

SciTech Connect (OSTI)

Few layer graphene (FLG) is grown on single crystal Cu(111) by Chemical Vapor Deposition, and the electronic valence band structure is imaged by Angle-Resolved Photo-Emission Spectroscopy. It is found that graphene essentially grows polycrystalline. Three nearly ideal Dirac cones are observed along the Cu ?{sup }K{sup } direction in k-space, attributed to the presence of ?4 twisted three layer graphene with negligible interlayer coupling. The number of layers and the stacking order are compatible with Raman data analysis demonstrating the complementarity of the two techniques for a more accurate characterization of FLG.

Marquez Velasco, J. [National Center for Scientific Research Demokritos, 15310 Athens (Greece) [National Center for Scientific Research Demokritos, 15310 Athens (Greece); Department of Physics, National Technical University of Athens, Athens (Greece); Kelaidis, N.; Xenogiannopoulou, E.; Tsoutsou, D.; Tsipas, P.; Speliotis, Th.; Pilatos, G.; Likodimos, V.; Falaras, P.; Dimoulas, A., E-mail: dimoulas@ims.demokritos.gr [National Center for Scientific Research Demokritos, 15310 Athens (Greece); Raptis, Y. S. [Department of Physics, National Technical University of Athens, Athens (Greece)] [Department of Physics, National Technical University of Athens, Athens (Greece)

2013-11-18T23:59:59.000Z

Note: This page contains sample records for the topic "bermuda cu cuba" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Magnetic shielding properties of plasma sprayed YBa2Cu3O7-x on nickel substrates  

Science Journals Connector (OSTI)

YBa2Cu3O7-x films were grown by a low pressure plasma spraying technique and atmospheric plasma spray on polycrystalline nickel substrate using yttrium-stabilized zirconia as a buffer layer. After post-annealing in oxygen at high temperature, zero resistance is reached above 77 K. YBa2Cu3O7-x films with thicknesses between 120 and 420 ?m were prepared and their critical currents measured. The a.c. magnetic shielding properties were determined in the high frequency region, 100 kHz to 3 MHz. The relations between the screening properties, the critical currents and the microstructure of the thin films are discussed.

D. Castello; J. Fontcuberta; M. Pont; J.S. Muoz

1992-01-01T23:59:59.000Z

382

Synthesis of highly phase pure (Bi, Pb)-Sr-Ca-Cu-O superconductor  

DOE Patents [OSTI]

An article and method of manufacture of (Bi,Pb)-Sr-Ca-Cu-O superconductor are disclosed. The superconductor is manufactured by preparing a first powdered mixture of bismuth oxide, lead oxide, strontium carbonate, calcium carbonate and copper oxide. A second powdered mixture is then prepared of strontium carbonate, calcium carbonate and copper oxide. The mixtures are calcined separately with the two mixtures then combined. The resulting combined mixture is then subjected to a powder in tube deformation and thermal processing to produce a substantially phase pure (Bi,Pb)-Sr-Ca-Cu-O superconductor. 5 figs.

Dorris, S.E.; Poeppel, R.B.; Prorok, B.C.; Lanagan, M.T.; Maroni, V.A.

1994-10-11T23:59:59.000Z

383

Synthesis of highly phase pure (Bi, Pb)-Sr-Ca-Cu-O superconductor  

DOE Patents [OSTI]

An article and method of manufacture of (Bi,Pb)-Sr-Ca-Cu-O superconductor. The superconductor is manufactured by preparing a first powdered mixture of bismuth oxide, lead oxide, strontium carbonate, calcium carbonate and copper oxide. A second powdered mixture is then prepared of strontium carbonate, calcium carbonate and copper oxide. The mixtures are calcined separately with the two mixtures then combined. The resulting combined mixture is then subjected to a powder in tube deformation and thermal processing to produce a substantially phase pure (Bi,Pb)-Sr-Ca-Cu-O superconductor.

Dorris, Stephen E. (La Grange Park, IL); Poeppel, Roger B. (Glen Ellyn, IL); Prorok, Barton C. (Harrisville, PA); Lanagan, Michael T. (Woodridge, IL); Maroni, Victor A. (Naperville, IL)

1994-01-01T23:59:59.000Z

384

Geometry and Electronic Structure of Cl on the Cu {001} Surface  

Science Journals Connector (OSTI)

The atomic geometry of Cu{001}c(22)-Cl has been determined by surface extended x-ray-absorption fine structure to consist of a simple Cl overlayer in fourfold Cu hollows with a (2.37 0.02)- bond length. With use of this geometry, self-consistent electronic structure calculations were performed and compared with angle-resolved photoemission data, giving excellent agreement for the position and dispersion of several Cl-induced surface states and resonances. These results have resolved previously reported discrepancies for the Ag{001}c(22)-Cl system.

P. H. Citrin, D. R. Hamann, L. F. Mattheiss, and J. E. Rowe

1982-12-06T23:59:59.000Z

385

Effect of doping on flux pinning of Gd Ba 2 Cu 3 O 7 ? y  

Science Journals Connector (OSTI)

Cylindrical single grains of Gd Ba 2 Cu 3 O y (Gd-123) with a diameter of 25 mm were successfully fabricated by melt-texture growth (MTG) process in air to study the influence of different starting powders on flux pinning.Measurements of the magnetic critical current density ( J c ) showed that it was possible to fabricate large Gd-123 single grain with a high J c at high temperatures and fields by means of properly controlling the starting powders of Gd 2 O 3 Ba C O 3 and CuO before the MTG process.

L. Zhang; X. B. Xu; S. Y. Ding; M. H. Zheng; L. Xiao; H. T. Ren; Y. L. Jiao; X. L. Wang; Z. W. Lin; J. G. Zhu

2005-01-01T23:59:59.000Z

386

Electronic Structure and Optical Properties of AFeO2 (A = Ag, Cu) within GGA Calculations  

Science Journals Connector (OSTI)

Electronic Structure and Optical Properties of AFeO2 (A = Ag, Cu) within GGA Calculations ... The electronic structure of delafossite type oxides AFeO2 (A = Ag, Cu) has been calculated using the full potential linearized augmented plane wave (FP-LAPW) method within the local spin density approximation (LSDA), Perdew?Burke?Ernzerhof (PBE-GGA), and Engel?Vosko (EV-GGA) generalized-gradient approximations. ... The effective Hubbard U, Ueff, has been derived on the basis of an ab initio constraint calculation and by comparison with X-ray emission spectra. ...

Khuong P. Ong; Kewu Bai; Peter Blaha; Ping Wu

2007-01-06T23:59:59.000Z

387

A study on the dual-phase treatment of weathering steel 09CuPCrNi  

Science Journals Connector (OSTI)

Dual-phase treatment processes, the resultant microstructures and the corresponding mechanical behavior and properties of weathering steel 09CuPCrNi have been studied. The results show that the microstructures of weathering steel 09CuPCrNi after intercritical quenching are characterized by an irregular distribution of island-shaped martensite in the matrix of equi-axed ferrite grains. Favorable mechanical properties and cold formability can be obtained through the intercritical quenching at 780 C. The dual-phase-treated steel is superior in weldability to the as-received hot-rolled steel and its atmospheric corrosion resistance is better than that of the original.

Chunling Zhang; Dayong Cai; Bo Liao; Tianchen Zhao; Yunchang Fan

2004-01-01T23:59:59.000Z

388

A study of magnetic anisotropy energy in CuMn spin glass  

E-Print Network [OSTI]

A STUDY OF MAGNETIC ANISOTROPY ENERGY IN CuMn SPIN GLASS A Thesis by CHRISTINE ADELE ALLEN Submitted to the Graduate College of Texas ARM University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE August 1986... Major Subject: Physics A STUDY OF MAGNETIC ANISOTROPY ENERGY IN CuMn SPIN GLASS A Thesis by CHRISTINE ADELE ALLEN Approved as to style and content by: Thomas W. Adair, III (Chai man of Committee) Robert A. enefick (Member) Donald L. Parker...

Allen, Christine Adele

2012-06-07T23:59:59.000Z

389

Morphology and properties of a hybrid organic-inorganic system: Al nanoparticles embedded into CuPc thin film  

SciTech Connect (OSTI)

The evolution of the morphology and the electronic structure of the hybrid organic-inorganic system composed of aluminum nanoparticles (NPs) distributed in an organic semiconductor matrixcopper phthalocyanine (CuPc)as a function of nominal aluminum content was studied by transmission electron microscopy and by photoemission spectroscopy methods. The aluminum atoms deposited onto the CuPc surface diffuse into the organic matrix and self-assemble to NPs in a well-defined manner with a narrow diameter distribution, which depends on the amount of aluminum that is evaporated onto the CuPc film. We find clear evidence of a charge transfer from Al to CuPc and we have been able to determine the lattice sites where Al ions sit. The finally at high coverage about 64? the formation of metallic aluminum overlayer on CuPc thin film takes place.

Molodtsova, O. V.; Babenkov, S. V. [Deutsches Elektronen-Synchrotron DESY, Notkestrae 85, 22607 Hamburg (Germany); Aristova, I. M. [Institute of Solid State Physics of Russian Academy of Sciences, Chernogolovka 142432 (Russian Federation); Vilkov, O. V. [Helmholtz-Zentrum Berlin (HZB) fr Materialien und Energie, Albert-Einstein-Strae 15, 12489 Berlin (Germany); Aristov, V. Yu., E-mail: aristov@issp.ac.ru [Deutsches Elektronen-Synchrotron DESY, Notkestrae 85, 22607 Hamburg (Germany); Institute of Solid State Physics of Russian Academy of Sciences, Chernogolovka 142432 (Russian Federation); Institut fr Theoretische Physik, Universitt Hamburg, Jungiusstrae 9, D-20355 Hamburg (Germany)

2014-04-28T23:59:59.000Z

390

Transmission electron microscopy and Monte Carlo simulations of ordering in Au-Cu clusters produced in a laser vaporization source  

Science Journals Connector (OSTI)

Au-Cu bimetallic alloy clusters are produced in a laser vaporization source starting from Au-Cu alloy targets with different stoichiometric compositions. The clusters are deposited on two different substratesamorphous carbon and crystalline MgOand are characterized by electron diffraction and high-resolution electron microscopy. The experiments show that the overall chemical composition in the clusters is the same as the chemical composition of the target material; but the crystal structure of the Au-Cu alloy clusters differs from their known bulk crystal structure. Electron microscopy experiments provide evidence that no chemical ordering exists between Au and Cu atoms and that the clusters are solid solutions. Monte Carlo simulations using the second moment tight-binding approximation, however, predict Cu3Au clusters ordered in the core but with a disordered mantle. The possible origins of the differences between experiment and Monte Carlo simulations are discussed.

B. Pauwels; G. Van Tendeloo; E. Zhurkin; M. Hou; G. Verschoren; L. Theil Kuhn; W. Bouwen; P. Lievens

2001-03-27T23:59:59.000Z

391

Effects of surface treatment on the bonding quality of wafer-level Cu-to-Cu thermo-compression bonding for 3D integration  

Science Journals Connector (OSTI)

Various surface treatments are applied for surface oxide removal prior to wafer-level Cu-to-Cu thermo-compression bonding and the bonding quality is systematically analyzed in this work. Three methods are investigated: self-assembled monolayer (SAM) passivation, forming gas annealing and acetic acid wet cleaning. The surface conditions are carefully examined including roughness, contact angle and x-ray photoelectron spectroscopy (XPS) scan. The wafer pairs are bonded at 250??C under a bonding force of 5500?N for a duration of 1?h in a vacuum environment. The bonding medium consists of a Cu (300?nm) bonding layer and a Ti (50?nm) barrier layer. The bonding quality investigation consists of two parts: hermeticity based on helium leak test and mechanical strength using four-point bending method. Although all samples under test with different surface treatment methods present an excellent hermetic seal and a robust mechanical support, the measurement results show that samples bonded after SAM passivation exhibit the best hermeticity and bonding strength for 3D integration application.

J Fan; D F Lim; C S Tan

2013-01-01T23:59:59.000Z

392

Segregation of copper to (100) and (111) silicon surfaces from internal Cu{sub 3}Si precipitates  

SciTech Connect (OSTI)

Segregation of transition metal impurities to surfaces or interfaces can have detrimental or beneficial effects in silicon-based microelectronic devices. Controlled segregation of impurities to regions remote from device structures, i.e. gettering is routinely used to prevent uncontrolled segregation to critical regions which may cause failure. Internal gettering is a widely used process in which oxide precipitates and associated lattice defects provide sites for precipitation of metal-silicide phases. Segregation of impurities onto surfaces of internal microcavities has also been examined as a potential gettering process. It was observed that gettering to cavities can dissolve pre-existing internal metal silicide precipitates of Cu, Au and Ni. The energetics of copper segregation to silicon surfaces were examined by measuring the Cu coverage after equilibration between Cu on the surface and internal Cu{sub 3}Si, for which the Cu chemical potential is known. For oxide-free surfaces the Cu coverage was close to one monolayer on (111) surfaces but was much smaller on (100) surfaces. The Cu coverage was greatly reduced by oxide passivation of the surface. LEED showed the 7 x 7 structure of the clean (111) silicon surface converted to a quasiperiodic 5 x 5 structure after equilibrating with Cu{sub 3}Si. The 2 x 1 LEED patterns for (100) surfaces indicated no change in surface structure due to the Cu{sub 3}Si. These results show that the free energy of copper in Cu{sub 3}Si is higher than that of copper on (111) surfaces but lower than that of copper on (100) surfaces.

Wampler, W.R.

1996-12-01T23:59:59.000Z

393

Kinetics of thin-film reactions of Cu/a-Ge bilayers Z. Wang, G. Ramanath, L. H. Allen, and A. Rocketta)  

E-Print Network [OSTI]

metallizations in Si-based ultra-large- scale integrated circuits.2,3 Direct contact between Cu and Si generally rapid oxidation in air.9 These behaviors have made Cu metallizations on Si rela- tively unattractive. However, preliminary results have re- cently suggested that Cu germanides may provide superior

Allen, Leslie H.

394

Effect of Via Separationand Low-k Dielectric Materials on the Thermal Characteristics of Cu Interconnects  

E-Print Network [OSTI]

Effect of Via Separationand Low-k Dielectric Materials on the Thermal Characteristics of Cu in low-k based interconnect structures by providing lower thermal resistance paths. In this paper that the temperature is highly dependent on the via separation. A 3-D electro-thermal simulation methodology using

395

Cu-Bi as a Model System For Liquid Phase Sintered Thermal Interface Management Materials  

E-Print Network [OSTI]

relates electrical resistivity to thermal conductivity for materials where electrons are principleCu-Bi as a Model System For Liquid Phase Sintered Thermal Interface Management Materials P to produce composite materials. A high melting phase (HMP) and low melting phase (LMP) are mixed

Collins, Gary S.

396

Possible Origin of Improved High Temperature Performance of Hydrothermally Aged Cu/Beta Zeolite Catalysts  

SciTech Connect (OSTI)

The hydrothermal stability of Cu/beta NH3 SCR catalysts are explored here. In particular, this paper focuses on the interesting ability of this catalyst to maintain and even enhance high-temperature performance for the "standard" SCR reaction after modest (900 C, 2 hours) hydrothermal aging. Characterization of the fresh and aged catalysts was performed with an aim to identify possible catalytic phases responsible for the enhanced high temperature performance. XRD, TEM and 27Al NMR all showed that the hydrothermally aging conditions used here resulted in almost complete loss of the beta zeolite structure between 1 and 2 hours aging. While the 27Al NMR spectra of 2 and 10 hour hydrothermally-aged catalysts showed significant loss of a peak associated with tetrahedrally-coordinated Al species, no new spectral features were evident. Two model catalysts, suggested by these characterization data as possible mimics of the catalytic phase formed during hydrothermal aging of Cu/beta, were prepared and tested for their performance in the "standard" SCR and NH3 oxidation reactions. The similarity in their reactivity compared to the 2 hour hydrothermally-aged Cu/beta catalyst suggests possible routes for preparing multi-component catalysts that may have wider temperature windows for optimum performance than those provided by current Cu/zeolite catalysts.

Peden, Charles HF; Kwak, Ja Hun; Burton, Sarah D.; Tonkyn, Russell G.; Kim, Do Heui; Lee, Jong H.; Jen, H. W.; Cavattaio, Giovanni; Cheng, Yisun; Lambert, Christine

2012-04-30T23:59:59.000Z

397

IAA-CU-13-11-06 Using independent combinations of CubeSat  

E-Print Network [OSTI]

IAA-CU-13-11-06 Using independent combinations of CubeSat solar panels as sun sensors. Using solar panels on 5 of 6 sides of the NUTS CubeSat, we have a lot of atti- tude determinating information readily available during much of the periodical orbit. Using three or more solar panels

Gravdahl, Jan Tommy

398

The CU Aerospace / VACCO CubeSat High Impulse Propulsion System (CHIPS) offers a miniaturized and  

E-Print Network [OSTI]

· Overall control authority: roll, pitch, yaw, +/- Z · On-orbit update of system parameters, including · System two-failure-tolerant against leakage · Life span: 2+ years from propellant load. · HighThe CU Aerospace / VACCO CubeSat High Impulse Propulsion System (CHIPS) offers a miniaturized

Carroll, David L.

399

Strong and ductile nanostructured Cu-carbon nanotube composite Hongqi Li,1,a  

E-Print Network [OSTI]

Strong and ductile nanostructured Cu-carbon nanotube composite Hongqi Li,1,a Amit Misra,1 Zenji composite grain size 25 nm with high strength and good ductility was developed. Pillar testing reveals properties make CNTs an ideal nanoscale reinforcement to tailor multifunctional composites with optimal

Zhu, Yuntian T.

400

Metal Ion Chaperone Function of the Soluble Cu(I) Receptor Atx1  

Science Journals Connector (OSTI)

...performed in an inert atmosphere at 4C. CuSO 4 (2...on a Bruker 600-MHz spectrometer (14...University 600-MHz NMR Facility...uptake protein in the plasma membrane; Ccc2...homology are light. Areas with internal gaps...Y, Tyr. [View Larger Version of this...

R. A. Pufahl; C. P. Singer; K. L. Peariso; S.-J. Lin; P. J. Schmidt; C. J. Fahrni; V. Cizewski Culotta; J. E. Penner-Hahn; T. V. O'Halloran

1997-10-31T23:59:59.000Z

Note: This page contains sample records for the topic "bermuda cu cuba" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Author's personal copy Fate of CuO-derived lignin oxidation products during plant combustion  

E-Print Network [OSTI]

Author's personal copy Fate of CuO-derived lignin oxidation products during plant combustion natural chars originating from combustion of angiosperm/gymnosperm and woody/non-woody plants. The lignin to study the impact of combustion on lignins and their commonly used parameters. Our results show

Louchouarn, Patrick

402

Phase transition and copper ion conductor in PbBr2-CuBr  

Science Journals Connector (OSTI)

The solid solution of PbBr2-CuBr has a high electric conductivity above 150 C. The frequency and temperature dependences of complex dielectric constants have been investigated in the concentration of x=0.01-0.3....

N. Inoue; T. Nishiura

1997-01-01T23:59:59.000Z

403

Differential Oxidative Stress of Octahedral and Cubic Cu2O Micro/Nanocrystals to Daphnia magna  

Science Journals Connector (OSTI)

Publication Date (Web): August 15, 2012 ... Two differently shaped Cu2O micro/nanocrystals (cubes and octahedrons with side lengths of 900 nm) were exposed to Daphnia magna for 72 h, afterward several antioxidant biomarkers such as reactive oxygen species (ROS), catalase (CAT), total antioxidant capacity (T-AOC), and malondialdehyde (MDA) in D. magna were measured. ... (50, 51) ...

Wenhong Fan; Xiaolong Wang; Minming Cui; Dongfeng Zhang; Yuan Zhang; Tao Yu; Lin Guo

2012-08-15T23:59:59.000Z

404

Equilibrium crystal shape of Bi-saturated Cu crystals at 1223K Dominique Chatain1  

E-Print Network [OSTI]

) embrittlement [8,9] and grain boundary facetting [10,11] due to Bi GB segregation, as well as liquid metal embrittlement [12,13] as a result of wetting of Cu grain boundaries by Bi-containing liquid. A recent study for 18h at 1223K in an atmosphere of flowing hydrogen, in the presence of a Bi drop saturated with copper

Rohrer, Gregory S.

405

Ab initio atomistic thermodynamics study of the early stages of Cu(100) oxidation  

E-Print Network [OSTI]

­3 catalytic conversion of nitrogen oxides,4 water-gas shift,5,6 and preventing CO poisoning in fuel cells.7 the nucleation limit of Cu2O, they are likely to exist due to kinetic hindrance. 1 #12;I. INTRODUCTION Oxidation

McGaughey, Alan

406

Kinetics of CO adsorption on epitaxial (111)Cu on (111)Pd thin films  

SciTech Connect (OSTI)

CO adsorption has been studied on (111)Cu/Pd thin-film surfaces grown epitaxially on mica in UHV of base pressure 5 x 10/sup -11/ Torr. Auger electron spectroscopy investigations of the growth of Cu on (111)Pd films showed that layer growth occurred. The Kelvin probe, work function method was used to monitor the CO adsorption at 298 K as a function of Cu overlayer thickness. It was found that very thin Cu overlayers had a drastic effect on saturation CO coverage: one monolayer of copper reduced the saturation CO coverage by /similar to/95%. For the pure (111)Pd thin-film surface, the data showed that the rate of CO adsorption changes when the CO fractional coverage approaches /similar to/0.4. This result is most likely due to the previously reported change in CO superlattice structure that occurs with increasing coverage. The kinetic adsorption data for various bilayers were interpreted in terms of a first-order Kisliuk mobile precursor model.

Oral, B.; Kothari, R.; Vook, R.W.

1989-05-01T23:59:59.000Z

407

Micro-chip initiator realized by integrating Al/CuO multilayer nanothermite on polymeric membrane  

Science Journals Connector (OSTI)

We have developed a new nanothermite based polymeric electro-thermal initiator for non-contact ignition of a propellant. A reactive Al/CuO multilayer nanothermite resides on a 100m thick SU-8/PET (polyethyleneterephtalate) membrane to insulate the reactive layer from the silicon bulk substrate. When current is supplied to the initiator, the chemical reaction Al+CuO occurs and sparkles are spread to a distance of several millimeters. A micro-manufacturing process for fabricating the initiator is presented and the electrical behaviors of the ignition elements are also investigated. The characteristics of the initiator made on a 100m thick SU-8/PET membrane were compared to two bulk electro-thermal initiators: one on a silicon and one on a Pyrex substrate. The PET devices give 100% of Al/CuO ignition success for an electrical current >250mA. Glass based reactive initiators give 100% of Al/CuO ignition success for an electrical current >500mA. Reactive initiators directly on silicon cannot initiate even with a 4 A current. At low currents (

G Taton; D Lagrange; V Conedera; L Renaud; C Rossi

2013-01-01T23:59:59.000Z

408

Effect of O2 adsorption on electron scattering at Cu,,001... surfaces J. S. Chawla,1  

E-Print Network [OSTI]

solar conversion,19 and may become important for gas sensing applications. The increase­5 and adsorption of for- eign atoms and molecules,5­9 and have gained interest due to their importance and oxidation of Cu sur- faces is particularly important to microelectronics and nano- electronics

Gall, Daniel

409

CU-CAS-00-14 CENTER FOR AEROSPACE STRUCTURES Recent Advances in  

E-Print Network [OSTI]

CU-CAS-00-14 CENTER FOR AEROSPACE STRUCTURES Recent Advances in Finite Element Templates by C. A;Recent Advances in Finite Element Templates Carlos A. Felippa Department of Aerospace Engineering Sciences and Center for Aerospace Structures University of Colorado at Boulder Boulder, Colorado 80309

Felippa, Carlos A.

410

Transition metal interaction and Ni-Fe-Cu-Si phases in silicon T. Buonassisi,b  

E-Print Network [OSTI]

precipitation may reduce the lattice mismatch compared to single-metal precipitates, rendering mixed-metal-silicide recombination activity of metal silicide clusters. Common solar cell materials are not contaminated with justTransition metal interaction and Ni-Fe-Cu-Si phases in silicon M. Heuer,a T. Buonassisi,b A. A

411

CU-CAS-97-09 CENTER FOR AEROSPACE STRUCTURES THE CONSTRUCTION OF FREE-FREE  

E-Print Network [OSTI]

CU-CAS-97-09 CENTER FOR AEROSPACE STRUCTURES THE CONSTRUCTION OF FREE-FREE FLEXIBILITY MATRICES OF ENGINEERING UNIVERSITY OF COLORADO CAMPUS BOX 429 BOULDER, COLORADO 80309 #12;The Construction of Free-Free­418, of that journal) #12;The Construction of Free-Free Flexibility Matrices as Generalized Stiffness Inverses C. A

Felippa, Carlos A.

412

Semimetallic antiferromagnetism in the half-Heusler compound CuMnSb Ruben Weht,2  

E-Print Network [OSTI]

CuMnSb, the first antiferromagnet AFM in the Mn-based class of Heuslers and half-Heuslers that contains several conventional and half metallic ferromagnets, shows a peculiar stability of its magnetic order in high magnetic fields. Density functional based studies reveal an unusual nature of its unstable

Pickett, Warren

413

Laser cladding of quasicrystal forming AlCuFe on aluminum Krishanu Biswas a  

E-Print Network [OSTI]

Laser cladding of quasicrystal forming Al­Cu­Fe on aluminum Krishanu Biswas a , Rolf Galun b-Zellerfeld, Germany Abstract Composite quasicrystalline coatings are developed by laser cladding of an elemental of the primary phase inside the clad layers during laser processing. The formation of Al13Fe4 with a ten

Srivastava, Kumar Vaibhav

414

Evolution of Graphene Growth on Ni and Cu by Carbon Isotope Labeling  

E-Print Network [OSTI]

Evolution of Graphene Growth on Ni and Cu by Carbon Isotope Labeling Xuesong Li, Weiwei Cai, Luigi Instruments Incorporated, Dallas, Texas 75243 Received August 3, 2009 ABSTRACT Large-area graphene growth) of hydrocarbons has shown some promise in growing large-area graphene or few-layer graphene films on metal

415

Low energy ion assisted deposition of Ta/Cu films J. J. Quana  

E-Print Network [OSTI]

Low energy ion assisted deposition of Ta/Cu films J. J. Quana Department of Engineering Physics of Materials Science and Engineering, University of Virginia, Charlottesville, Virginia 22904 Received 5 dynamics simulations and experiments has been used to investigate the use of various low energy ion

Wadley, Haydn

416

Selective Chemical Vapor Deposition of Manganese Self-Aligned Capping Layer for Cu Interconnections  

E-Print Network [OSTI]

could not be broken apart. This Mn-enhanced binding strength of Cu to insulators is observed for all and nitrides. An adhesive tape is usually sufficient to remove copper films from these surfaces. Quantitative reliability because cobalt on the dielectric can increase leakage and lower the breakdown voltage.4 Cobalt

417

The crystal structure and growth direction of nanowire arraysCu fabricated on a copper surface  

E-Print Network [OSTI]

The crystal structure and growth direction of nanowire arraysCu 2 S fabricated on a copper surface We examine the crystal structure and growth direction of nanowire arrays grown from copper surfaces10 On this line, we have recently discovered that by exposing a surfactant-treated copper surface

Wang, Zhong L.

418

Preparation of Bi-Sr-Ca-Cu-O superconductors from oxide-glass precursors  

DOE Patents [OSTI]

A superconductor and precursor therefor from oxide mixtures of Ca, Sr, Bi and Cu. Glass precursors quenched to elevated temperatures result in glass free of crystalline precipitates having enhanced mechanical properties. Superconductors are formed from the glass precursors by heating in the presence of oxygen to a temperature below the melting point of the glass.

Hinks, David G. (Lemont, IL); Capone, II, Donald W. (Northbridge, MA)

1992-01-01T23:59:59.000Z

419

Optical properties of the spin-ladder compound Sr14Cu24O41  

Science Journals Connector (OSTI)

We report the measurements of the pseudodielectric function, far-infrared reflectivity, and Raman scattering spectra in Sr14Cu24O41 single crystal. We study the lattice and the spin dynamics of the Cu2O3 spin ladders and CuO2 chains of this compound. The ellipsometric and the optical reflectivity measurements yield the gap values of 1.4, 1.86, 2.34 eV (2.5 eV) for the ladders (chains) along the c axis and 2.4 eV along the a axis. The electronic structure of the Cu2O3 ladders is analyzed using the tight-binding approach for the correlated electron systems. The correlation gap value of 1.4 eV is calculated with the transfer energy (hopping) parameters t=t0=0.26 eV, along and perpendicular to legs, txy=0.026 eV (interladder hopping) and U=2.1 eV, as a Coulomb repulsion. The optical parameters of the infrared-active phonons and plasmons are obtained by an oscillator fitting procedure of the reflectivity spectra. Raman scattering spectra are measured at different temperatures using different laser line energies. The two-magnon peak is observed at about 2880 cm-1. At temperatures below 150 K the new infrared and Raman modes appear due to the charge ordering.

Z. V. Popovi?; M. J. Konstantinovi?; V. A. Ivanov; O. P. Khuong; R. Gaji?; A. Vietkin; V. V. Moshchalkov

2000-08-15T23:59:59.000Z

420

Vacancy diffusion in the Cu(001) surface II: Random walk theory  

E-Print Network [OSTI]

Vacancy diffusion in the Cu(001) surface II: Random walk theory E. Somfai a,*,1 , R. van Gastel b Abstract We develop a version of the vacancy mediated tracer diffusion model, which follows the properties for the vacancy, and (iii) the diffusion rate of the vacancy is different, in our case strongly enhanced

van Saarloos, Wim

Note: This page contains sample records for the topic "bermuda cu cuba" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Structures of nanowires with Zn-ZnO:CuO junctions for detecting ethanol vapors  

Science Journals Connector (OSTI)

The synthesis of ZnO-ZnO:CuO structures in the form of overlapping layers of nanowires of pure and copper oxide-doped zinc oxide is described. These structures are tested as ethanol vapor sensors. The following t...

T. V. Peshkova; D. Ts. Dimitrov; S. S. Nalimova; I. E. Kononova

2014-05-01T23:59:59.000Z

422

Cu(In,Ga)Se2based Photovoltaics: Challenges and Opportunities  

E-Print Network [OSTI]

Cu(In,Ga)Se2­based Photovoltaics: Challenges and Opportunities William Shafarman Institute of Energy Conversion University of Delaware #12;Thin Film Photovoltaics Potential for low cost PV using a Thickness K.Kim, et al., IEEE J. Photovoltaics, 3, 446 (2013). 2 µm, 60 min reaction 1 µm, 25 min reaction 0

Firestone, Jeremy

423

Cu2ZnSnS4 nanocrystals and graphene quantum dots for photovoltaics Xukai Xinab  

E-Print Network [OSTI]

Cu2ZnSnS4 nanocrystals and graphene quantum dots for photovoltaics Jun Wang,a Xukai Xinab advances in the synthesis and utilization of CZTS nanocrystals and colloidal GQDs for photovoltaics emerged to achieve low cost, high perfor- mance photovoltaics, including organic solar cells,2­6 dye

Lin, Zhiqun

424

Evaluation of high strength, high conductivity CuNiBe alloys for fusion energy applications  

SciTech Connect (OSTI)

The unirradiated tensile properties for several different heats and thermomechanical treatment conditions of precipitation strengthened Hycon 3HPTM CuNiBe (Cu-2%Ni-0.35%Be in wt.%) have been measured over the temperature range of 20-500 C for longitudinal and long transverse orientations. The room temperature electrical conductivity has also been measured for several heats, and the precipitate microstructure was characterized using transmission electron microscopy. The CuNiBe alloys exhibit very good combination of strength and conductivity at room temperature, with yield strengths of 630-725 MPa and electrical conductivities of 65-72% International Annealed Copper Standard (IACS). The strength remained relatively high at all test temperatures, with yield strengths of 420-520 MPa at 500 C. However, low levels of ductility (<5% uniform elongation) were observed at test temperatures above 200-250 C, due to flow localization near grain boundaries (exacerbated by having only 10-20 grains across the gage thickness of the miniaturized sheet tensile specimens). Scanning electron microscopy observation of the fracture surfaces found a transition from ductile transgranular to ductile intergranular fracture with increasing test temperature. Fission neutron irradiation to a dose of ~0.7 displacements per atom (dpa) at temperatures between 100 and 240 C produced a slight increase in strength and a significant decrease in ductility. The measured tensile elongation increased with increasing irradiation temperature, with a uniform elongation of ~3.3% observed at 240 C. The electrical conductivity decreased slightly following irradiation, due to the presence of defect clusters and Ni, Zn, Co transmutation products. Considering also previously published fracture toughness data, this indicates that CuNiBe alloys have irradiated tensile and electrical properties comparable or superior to CuCrZr and oxide dispersion strengthened copper at temperatures <250 C, and may be an attractive candidate for certain fusion energy structural applications. Conversely, CuNiBe may not be preferred at intermediate temperatures of 250-500 C due to the poor ductility and fracture toughness of CuNiBe alloys at temperatures >250 C. The potential deformation mechanisms responsible for the transition from transgranular to intergranular fracture are discussed. The possible implications for other precipitation hardened alloys such as nickel based superalloys are briefly discussed.

Zinkle, Steven J [ORNL] [ORNL

2014-01-01T23:59:59.000Z

425

Nanopattering in CeOx/Cu(111): A New Type of Surface Reconstruction and Enhancement of Catalytic Activity  

SciTech Connect (OSTI)

Our results indicate that small amounts of an oxide deposited on a stable metal surface can trigger a massive surface reconstruction under reaction conditions. In low-energy electron microscopy (LEEM) experiments, no reconstruction of Cu(111) is observed after chemisorbing oxygen or after reducing O/Cu(111) in a CO atmosphere. On the other hand, LEEM images taken in situ during the reduction of CeO{sub 2}/CuO{sub 1-x}/Cu(111) show a complex nonuniform transformation of the surface morphology. Ceria particles act as nucleation sites for the growth of copper microterraces once CuO{sub 1-x} is reduced. Can this reconstructed surface be used to enhance the catalytic activity of inverse oxide/metal catalysts? Indeed, CeO{sub x} on reconstructed Cu(111) is an extremely active catalyst for the water-gas shift process (CO + H{sub 2}O {yields} H{sub 2} + CO{sub 2}), with the Cu microterraces providing very efficient sites for the dissociation of water and subsequent reaction with CO.

Rodriguez J. A.; Senanayake, S.D.; Sadowski, J.; Evans, J.; Kundu, S.; Agnoli, S.; Yang, F.; Stacchiola, D.; Flege, J.I.; Hrbek, J.

2012-04-05T23:59:59.000Z

426

Structure Sensitivity of the Low-temperature Water-gas Shift Reaction on CuCeO2 catalysts  

SciTech Connect (OSTI)

We have investigated the structure sensitivity of the water-gas shift (WGS) reaction on Cu-CeO{sub 2} catalysts prepared at the nanoscale by different techniques. On the surface of ceria, different CuO{sub x} structures exist. We show here that only the strongly bound Cu-[O{sub x}]-Ce species, probably associated with the surface oxygen vacancies of ceria, are active for catalyzing the low-temperature WGS reaction. Weakly bound CuO{sub x} clusters and CuO nanoparticles are spectator species in the reaction. Isolated Cu{sup 2+} ions doping the ceria surface are not active themselves, but they are important in that they create oxygen vacancies and can be used as a reservoir of copper to replenish surface Cu removed by leaching or sintering. Accordingly, synthesis techniques such as coprecipitation that allow for extensive solubility of Cu in ceria should be preferred over impregnation, deposition-precipitation, ion exchange or another two-step method whereby the copper precursor is added to already made ceria nanocrystals. For the synthesis of different structures, we have used two methods: a homogeneous coprecipitation (CP), involving hexamethylenetetramine as the precipitating agent and the pH buffer; and a deposition-precipitation (DP) technique. In the latter case, the ceria supports were first synthesized at the nanoscale with different shapes (rods, cubes) to investigate any potential shape effect on the reaction. Cu-CeO{sub 2} catalysts with different copper contents up to ca. 20 at.% were prepared. An indirect shape effect of CeO{sub 2}, manifested by the propensity to form oxygen vacancies and strongly bind copper in the active form, was established; i.e. the water-gas shift reaction is not structure-sensitive. The apparent activation energy of the reaction on all samples was similar, 50 {+-} 10 kJ/mol, in a product-free (2% CO-10% H{sub 2}O) gas mixture.

Si, R.; Zhang, L.; Raitano, J.; Yi, N.; Chan, S.-W.; Flytzani-Stephanopoulos, M.

2012-01-17T23:59:59.000Z

427

Thin films preparation by rf-sputtering of copper/iron ceramic targets with Cu/Fe=1: From nanocomposites to delafossite compounds  

Science Journals Connector (OSTI)

In the CuFeO phase diagram, delafossite CuFeO2 is obtained for the CuI oxidation state and for the Cu/Fe=1 ratio. By decreasing the oxygen content, copper/spinel oxide composite can be obtained because of the reduction and the disproponation of cuprous ions. Many physical properties as for instance, electrical, optical, catalytic properties can then be affected by the control of the oxygen stoichiometry. In rf-sputtering technique, the bombardment energies on the substrate can be controlled by the deposition conditions leading to different oxygen stoichiometry in the growing layers. By this technique, thin films have been prepared from two ceramic targets: CuFeO2 and CuO+CuFe2O4. We thus synthesized either Cu0/CuxFe1?xO4 nanocomposites thin films with various Cu0 quantities or CuFeO2-based thin films. Two-probes conductivity measurements were permitted to comparatively evaluate the Cu0 content, while optical microscopy evidenced a self-assembly phenomenon during thermal annealing.

E. Mugnier; A. Barnab; L. Presmanes; Ph. Tailhades

2008-01-01T23:59:59.000Z

428

A study of the anodic polarization behavior of Zr(50)Cu(40-x)Al(10)Pd(x) BMG with scanning Auger microanalysis  

SciTech Connect (OSTI)

The anodic-polarization behaviors of Zr50Cu40-XAl10PdX (x = 0 and 7 atomic %) BMGs were investigated in 0.6 M NaCl electrolytes. Initial anodic polarization of both alloys yielded regions where small increases in the applied potential induced significant increases in the current density. Continued polarization of both BMGs resulted in diffusion controlled regimes. However, the limiting diffusion current density of Zr50Cu33Al10Pd7 was higher than that of Zr50Cu40Al10. Scanning Auger microanalysis was used to investigate the oxide formed during polarization and to analyze the chemistry within corrosion pits. The pits formed on both BMGs were enriched with Cu and Cl. Corrosion pits on Zr50Cu33Al10Pd7 were additionally enriched with Pd. A corrosion mechanism relating to the formation of CuCl and Cu2O is proposed based on both the polarization and microanalysis results.

Green, Brandice [ORNL; Meyer III, Harry M [ORNL; Benson, Roberto S [ORNL; Yokoyama, Y [Institute for Materials Research; Liaw, Peter K [University of Tennessee, Knoxville (UTK); Liu, Chain T [ORNL

2008-01-01T23:59:59.000Z

429

CuZnAl mixed metal oxides derived from hydroxycarbonate precursors for H2S removal at low temperature  

Science Journals Connector (OSTI)

One series of CuZn and two series of CuZnAl hydroxycarbonate precursors with varying metal molar ratios were prepared via co-precipitation or multi-precipitation method, and the mixed metal oxides obtained by calcination of the precursor materials were used as adsorbents for H2S removal in the range of 25100C. The results of H2S adsorption tests showed that these mixed oxides, especially two series of CuZnAl mixed metal oxides exhibited markedly high breakthrough sulfur capacities (ranging from 4.4 to 25.7gS/100g-sorbent with increase of Cu/Zn molar ratio) at 40C. Incorporation Cu and/or Al decreased the mean crystalline sizes of ZnO and CuO species in the CuZn and CuZnAl mixed metal oxide adsorbents by decreasing of mean crystalline sizes of hydroxycarbanate phases mainly including hydrozincite, aurichalcite and malachite, segregation of Al phase, etc. Higher breakthrough sulfur capacity of each adsorbent in two ternary series than that of the corresponding adsorbent in binary series should be ascribed to the enhancement of the dispersion of ZnO and/or CuO species with incorporation of aluminum, thereby increasing the overall rate of reaction between the adsorbent and H2S by reducing the thickness of potential sulfide shell on the outer layer of the oxide crystalline grains and increasing the area of the interface for the exchange of HS?/S2? and O2?. For each series of adsorbents, the breakthrough sulfur capacity increased with the increase of Cu/Zn molar ratio regardless of changes of the dispersion of CuO and/or ZnO. This phenomenon might be mainly attributed to faster rate of the lattice diffusion of HS?, S2? and O2? or exchange of HS?/S2? and O2? during the sulfidation of CuO than that during the sulfidation of ZnO due to less rearrangement of the anion lattice.

Dahao Jiang; Lianghu Su; Lei Ma; Nan Yao; Xiaoliang Xu; Haodong Tang; Xiaonian Li

2010-01-01T23:59:59.000Z

430

Low-temperature deposited Cu electrode on chip inductors by abnormal glow discharge plasma with arc source  

Science Journals Connector (OSTI)

A new preparation method of Cu electrodes of chip inductors by an abnormal glow discharge technique with arc source at low temperature is presented. SEM observed the microstructure of the Cu electrode joints and EDX detected the interfacial diffusion between the electrodes and the ceramic matrix. The results show that the new technique can effectively suppress interfacial diffusion and Cu oxidation whereas reserve good adhesion in the electrode layer due to low deposition temperature, which can be achieved by suitable control of glow discharge voltage. Consequently, the compromise magnetic properties of the samples can be obtained.

Yaowen Wang; Hongguo Zhang; Qiang Chen; Junde Pan; Longtu Li

2002-01-01T23:59:59.000Z

431

Method for preparation of textured YBa.sub.2 Cu.sub.3 O.sub.x superconductor  

DOE Patents [OSTI]

The present invention relate to textured YBa.sub.2 Cu.sub.3 O.sub.x (Y-123) superconductors and a process of preparing them by directional recrystallization of compacts fabricated from quenched YBCO powders at temperatures about 100.degree. C. below the peritectic temperature to provide a superconductor where more than 75% of the YBa.sub.2 Cu.sub.3 O.sub.x phase is obtained without any Y.sub.2 BaCuO.sub.5 .

Selvamanickam, Venkat (Guilderland, NY); Goyal, Amit (Knoxville, TN); Kroeger, Donald M. (Knoxville, TN)

1998-01-01T23:59:59.000Z

432

Comment on Thermal hysteresis in the normal-state magnetization of La2?xSrxCuO4  

Science Journals Connector (OSTI)

The aim of this comment is to explain why the thermal hysteresis in magnetization is observed in La2?xSrxCuO4 (LSCO) and presumably in all cuprates but not in the BCS superconductors such as Nb or Pb. The key to understanding the hysteresis in LSCO is the localization of pairs within the CuO6 pyramids and formation of charged and magnetic stripes in the CuO2 planes. Due to the chemical equilibrium the spin system of the localized triplet pairs is disordered due to their decay into mobile fermions. The explanation in terms of normal state vortices is shown to be invalid.

J. Hissa and A. Kallio

2005-11-04T23:59:59.000Z

433

Devitrification kinetics and phase selection mechanisms in Cu-Zr metallic glasses  

SciTech Connect (OSTI)

Metallic glasses have been a promising class of materials since their discovery in the 1960s. Indeed, remarkable chemical, mechanical and physical properties have attracted considerable attention, and several excellent reviews are available. Moreover, the special group of glass forming alloys known as the bulk metallic glasses (BMG) become amorphous solids even at relatively low cooling rates, allowing them to be cast in large cross sections, opening the scope of potential applications to include bulk forms and net shape structural applications. Recent studies have been reported for new bulk metallic glasses produced with lower cooling rates, from 0.1 to several hundred K/s. Some of the application products of BMGs include sporting goods, high performance springs and medical devices. Several rapid solidification techniques, including melt-spinning, atomization and surface melting have been developed to produce amorphous alloys. The aim of all these methods is to solidify the liquid phase rapidly enough to suppress the nucleation and growth of crystalline phases. Furthermore, the production of amorphous/crystalline composite (ACC) materials by partial crystallization of amorphous precursor has recently given rise to materials that provide better mechanical and magnetic properties than the monolithic amorphous or crystalline alloys. In addition, these advances illustrate the broad untapped potential of using the glassy state as an intermediate stage in the processing of new materials and nanostructures. These advances underlie the necessity of investigations on prediction and control of phase stability and microstructural dynamics during both solidification and devitrification processes. This research presented in this dissertation is mainly focused on Cu-Zr and Cu-Zr-Al alloy systems. The Cu-Zr binary system has high glass forming ability in a wide compositional range (35-70 at.% Cu). Thereby, Cu-Zr based alloys have attracted much attention according to fundamental research on the behaviors of glass forming alloys. Further motivation arising from the application of this system as a basis for many BMGs and ACC materials; the Cu-Zr system warrants this attention and offers great potential for the development of new materials. However, the prediction and control of microstructural evolution during devitrification remains challenging because of the complex devitrification behavior of the Cu-Zr binary alloy which is arising from the competition of metastable and stable phases and diversity of crystal structures. This dissertation details a systematic fundamental investigation into the mechanisms and kinetics of the various crystallization transformation processes involved in the overall devitrification response of Cu-Zr and Cu-Zr-Al glasses. Various isothermal and nonisothermal treatments are employed, and the structural response is characterized using bulk X-ray and thermal analysis methods as well as nanoscale microscopic analysis methods, revealing structural and chemical details down to the atomic-scale. By carefully combining techniques such as differential scanning calorimetry (DSC), in-situ synchrotron high energy X-ray diffraction (HEXRD), and transmission electron microscopy (TEM) to quantify the characterization transformations, this research has uncovered numerous details concerning the atomistic mechanisms of crystallization and has provided much new understanding related to the dominant phases, the overall reaction sequences, and the rate-controlling mechanisms. As such this work represents a substantial step forward in understanding these transformations and provides a clear framework for further progress toward ultimate application of controlled devitrification processing for the production of new materials with remarkable properties.

Kalay, Ilkay

2010-12-15T23:59:59.000Z

434

Superconductivity suppression of R(Ba1-zRz)2Cu3O7+? (R=Nd, Pr) probed by soft-x-ray absorption spectroscopy  

Science Journals Connector (OSTI)

O K-edge x-ray-absorption near-edge-structure (XANES) spectra of (Nd1-xPrx)1.05Ba1.95Cu3O7 for x=00.5 and Nd1.05(Ba1-zPrz)1.95Cu3O7+? for z=00.25 were performed to search for microstructural features and hole distribution related to the superconducting properties. Near the O 1s edge, prepeaks at ?527.6 and ?528.3 eV are assigned to transitions into O 2p holes located in the CuO3 ribbons and CuO2 planes, respectively. As deduced from O 1s absorption spectra of (Nd1-xPrx)1.05Ba1.95Cu3O7 for x=00.5, the hole concentrations in the CuO2 planes and CuO3 ribbons decrease monotonically with increasing Pr doping. The present XANES results clearly reveal that the suppression of superconductivity with Pr doping in (Nd1-xPrx)1.05Ba1.95Cu3O7 results predominantly from the hole depletion effect. The effect of Pr on the Ba site in Nd1.05(Ba1-zPrz)1.95Cu3O7+? is to reduce the hole concentration in the CuO2 planes and to create localized fivefold Cu chain sites. Tc of Nd1.05(Ba1-zPrz)1.95Cu3O7+? is depressed upon Pr doping, primarily due to hole filling and hole localization. Compared to (Nd1-xPrx)1.05Ba1.95Cu3O7, the enhanced suppression of Tc in Nd1.05(Ba1-zPrz)1.95Cu3O7+? is primarily due to the hole localization.

J. M. Chen; R. S. Liu; P. Nachimuthu; M. J. Kramer; K. W. Dennis; R. W. McCallum

1999-02-01T23:59:59.000Z

435

A Hydrological Model of Harrington Sound, Bermuda and its Surrounding Cave Systems  

E-Print Network [OSTI]

to the ocean (Table 2.1). Oceanic surface temperatures ranged from 26.7 to 30.6?C during the time of this investigation (BF&M, 2010). Profiles for caves with no sun exposure usually had temperature increasing with depth (75% of 28 sites) (Fig. 2.2). 28... to the ocean (Table 2.1). Oceanic surface temperatures ranged from 26.7 to 30.6?C during the time of this investigation (BF&M, 2010). Profiles for caves with no sun exposure usually had temperature increasing with depth (75% of 28 sites) (Fig. 2.2). 28...

Stoffer, Jonathan L

2013-04-23T23:59:59.000Z

436

Variation of carapace morphology of bairdiacean and cytheracean Ostracoda from Bermuda  

E-Print Network [OSTI]

. In Table 2 most of the probability levels are less than 0.01 and are regarded as highly significant. For Bairdia victrix, all seven characters show significant variation between local populations at the 0.01 level. Only six common characters of Orionina... bradyi show differences among popula- tions at that level of statistical significance. Four common characters of Loxocorniculum fischeri and none of the characters of Hemicytherura sp. are statistically significant at P<0.01. The rank correlation...

Cadot, H. M.; Kaesler, R. L.

1973-02-14T23:59:59.000Z

437

Assessing the Impact of Groundwater Pollution from Marine Caves on Nearshore Seagrass Beds in Bermuda  

E-Print Network [OSTI]

the enclosed, protected nature of the sound allowed for reduced wave and current action. Syringodium filiforme decreased in density towards the ocean signifying a direct influence of cave water on seagrass beds. Tidal in and out-flux allowed for a constantly...

Cate, Jenipher R.

2010-01-14T23:59:59.000Z

438

The influence of curing time on the keeping quality of Bermuda onions in refrigerated storage  

E-Print Network [OSTI]

rsssnh r Vilsrs tt!81! t i Gd. Qv!I S '!11 O' G Sr " 8 8'. 1, . t'tt lo' oi . Soil var '. 0 G' i:Q'- r ' 'v ' ' 1 rs. rI iJra . Dl a ' GGG QuGs '' 'rG 0 ti ' UL" '', 1 . . 1? for 8 8 O'' . ' G ro'W c!, 1 GS J G. ". !i G lt t. t't~ l. l''8 ;, Or !1... BIlcl J. 'f 1 OD J3acl 1388il gr QvJrJ 'Bl 45QDQ arri~ Jur 8 JJ u1 oo? 7 OSG I 8 'Bali . "1 u of ul" 8 'Jlr"!8 var:8 J;les of QB" vs clar Jlg 8 1 "Bp J1olo iic. ~181 . i!8 8 i. roo'AI I ell!gI'raaaros f olio+:" ii~e ref l'1 C: . ;. '"BLlea . ~ 2...

Mack, Harry John

2012-06-07T23:59:59.000Z

439

Characterization and performance of Cu/ZnO/Al2O3 catalysts prepared via decomposition of M(Cu, Zn)-ammonia complexes under sub-atmospheric pressure for methanol synthesis from H2 and CO2  

Science Journals Connector (OSTI)

Methanol synthesis from hydrognation of CO2 is investigated over Cu/ZnO/Al2O3 catalysts prepared by decomposition of M(Cu, Zn)-ammonia complexes (DMAC) at various temperatures. The catalysts were characterized in detail, including X-ray diffraction, N2 adsorption-desorption, N2O chemisorption, temperature-programmed reduction and evolved gas analyses. The influences of DMAC temperature, reaction temperature and specific Cu surface area on catalytic performance are investigated. It is considered that the aurichalcite phase in the precursor plays a key role in improving the physiochemical properties and activities of the final catalysts. The catalyst from rich-aurichalcite precursor exhibits large specific Cu surface area and high space time yield of methanol (212 g/(Lcat h); T = 513 K, p = 3 MPa, SV = 12000 h?1).

Danjun Wang; Jun Zhao; Huanling Song; Lingjun Chou

2011-01-01T23:59:59.000Z

440

Tilting of the CuO6 octahedra in La1.83-xEu0.17SrxCuO4 as seen by Eu151 Mssbauer spectroscopy  

Science Journals Connector (OSTI)

Eu151 Mssbauer studies of La1.83-xEu0.17SrxCuO4 for 0<~x<~0.26 exhibit a quadrupole interaction at the Eu site whose magnitude eQVzz strongly depends on both the Sr content x and the temperature T. For a fixed temperature, a linear relationship is obtained between the quadrupole interaction and the averaged CuO6 octahedra tilting angle determined from diffraction studies. The unusually large temperature dependence of eQVzz strongly indicates a temperature dependence of the local structure. In contrast to recent studies of the local structure La2CuO4-type superconductors by means of x-ray-absorption and neutron-scattering techniques, our data give strong evidence that the local octahedra tilting in La1.83-xEu0.17SrxCuO4 corresponds well to the average tilting obtained by diffraction techniques.

C. Friedrich; B. Bchner; M. M. Abd-Elmeguid; H. Micklitz

1996-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "bermuda cu cuba" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Anomalous T3 Inverse Hall Mobilities Observed in Sr1-xCuO2 and Sr0.9Nd0.1CuO2 Infinite-Layer Thin Films  

Science Journals Connector (OSTI)

The infinite-layer CuO2 structure of the SrxCayCuO2 and SrxNd1-xCuO2 systems are predicted to result in a simple 2D Fermi surface and a single hybridized Cud-Op band. Unlike more complex high-Tc superconductors, the Hall mobilities in these systems should be unaffected by multiband scattering, allowing a more direct interpretation of the data. Here, we report the absence of the T-2 mobility commonly observed in other cuprates, suggesting that the T-2 dependence may originate from interband e--e- scattering. Finally, an anomalous T-2 mobility presents new challenges to our understanding.

Edwin C. Jones; David P. Norton; David K. Christen; Douglas H. Lowndes

1994-07-04T23:59:59.000Z

442

Charged and strange hadron elliptic flow in Cu+Cu collisions at sqrt sNN = 62.4 and 200 GeV  

SciTech Connect (OSTI)

We present the results of an elliptic flow, v{sub 2}, analysis of Cu+Cu collisions recorded with the STAR detector at RHIC at {radical}s{sub NN} = 62.4 and 200 GeV. Elliptic flow as a function of transverse momentum, v{sub 2}(p{sub T}), is reported for different collision centralities for charged hadrons h{sup {+-}}, and strangeness containing hadrons K{sub S}{sup 0}, {Lambda}, {Xi}, {phi} in the midrapidity region |{eta}| < 1.0. Significant reduction in systematic uncertainty of the measurement due to non-flow effects has been achieved by correlating particles at midrapidity, |{eta}| < 1.0, with those at forward rapidity, 2.5 < |{eta}| < 4.0. We also present azimuthal correlations in p+p collisions at {radical}s = 200 GeV to help estimating non-flow effects. To study the system-size dependence of elliptic flow, we present a detailed comparison with previously published results from Au+Au collisions at {radical}s{sub NN} = 200 GeV. We observe that v{sub 2}(p{sub T}) of strange hadrons has similar scaling properties as were first observed in Au+Au collisions, i.e.: (i) at low transverse momenta, p{sub T} < 2 GeV/c, v{sub 2} scales with transverse kinetic energy, m{sub T} - m, and (ii) at intermediate p{sub T}, 2 < p{sub T} < 4 GeV/c, it scales with the number of constituent quarks, n{sub q}. We have found that ideal hydrodynamic calculations fail to reproduce the centrality dependence of v{sub 2}(p{sub T}) for K{sub S}{sup 0} and {Lambda}. Eccentricity scaled v{sub 2} values, v{sub 2}/{var_epsilon}, are larger in more central collisions, suggesting stronger collective flow develops in more central collisions. The comparison with Au+Au collisions which go further in density shows v{sub 2}/{var_epsilon} depend on the system size, number of participants N{sub part}. This indicates that the ideal hydrodynamic limit is not reached in Cu+Cu collisions, presumably because the assumption of thermalization is not attained.

STAR Collaboration; Abelev, Betty

2010-07-05T23:59:59.000Z

443

Non-equilibrium deposition of phase pure Cu{sub 2}O thin films at reduced growth temperature  

SciTech Connect (OSTI)

Cuprous oxide (Cu{sub 2}O) is actively studied as a prototypical material for energy conversion and electronic applications. Here we reduce the growth temperature of phase pure Cu{sub 2}O thin films to 300?C by intentionally controlling solely the kinetic parameter (total chamber pressure, P{sub tot}) at fixed thermodynamic condition (0.25 mTorr pO{sub 2}). A strong non-monotonic effect of P{sub tot} on Cu-O phase formation is found using high-throughput combinatorial-pulsed laser deposition. This discovery creates new opportunities for the growth of Cu{sub 2}O devices with low thermal budget and illustrates the importance of kinetic effects for the synthesis of metastable materials with useful properties.

Subramaniyan, Archana, E-mail: asubrama@mymail.mines.edu [National Renewable Energy Laboratory, Golden, Colorado 80401 (United States); Department of Metallurgical and Materials Engineering, Colorado School of Mines, Golden, Colorado 80401 (United States); Perkins, John D.; Lany, Stephan; Stevanovic, Vladan; Ginley, David S.; Zakutayev, Andriy [National Renewable Energy Laboratory, Golden, Colorado 80401 (United States); OHayre, Ryan P. [Department of Metallurgical and Materials Engineering, Colorado School of Mines, Golden, Colorado 80401 (United States)

2014-02-01T23:59:59.000Z

444

The effect of off-center Cu2+ ions on the phase transition in lead germanate crystals  

Science Journals Connector (OSTI)

The properties of Pb5Ge3O11: Cu2+ crystals near the temperature of the ferroelectric phase transition are discussed in terms of a phenomenological...2+...is considered a result of static distortions, which result...

M. P. Trubitsyn; V. G. Pozdeev

2000-12-01T23:59:59.000Z

445

Comment on 'The diatomic dication CuZn{sup 2+} in the gas phase' [J. Chem. Phys. 135, 034306 (2011)  

SciTech Connect (OSTI)

In this Comment, the density functional theory (DFT) calculations carried out by Diez et al. [J. Chem. Phys. 135, 034306 (2011)] are revised within the framework of the coupled-cluster single double triple method. These more sophisticated calculations allow us to show that the {sup 2}{Sigma}{sup +} electronic ground state of CuZn{sup 2+}, characterized as the metastable ground state by DFT calculations, is a repulsive state instead. The {sup 2}{Delta} and {sup 2}{Pi} metastable states of CuZn{sup 2+}, on the other hand, should be responsible for the formation mechanism of the dication through the near-resonant electron transfer CuZn{sup +}+ Ar{sup +}{yields} CuZn{sup 2+}+ Ar reaction.

Fiser, Jiri [Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 128 40 Prague 2 (Czech Republic); Diez, Reinaldo Pis [Departamento de Quimica, CEQUINOR, Centro de Quimica Inorganica (CONICET, UNLP), Facultad de Ciencias Exactas, UNLP, CC 962, 1900 La Plata (Argentina); Franzreb, Klaus [Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287 (United States); Alonso, Julio A. [Departamento de Fisica Teorica, Universidad de Valladolid, E-47011 Valladolid (Spain)

2013-02-21T23:59:59.000Z

446

Study of a fractal nanoheterojunction in thin films made of CdS and Cu2S nanoparticles  

Science Journals Connector (OSTI)

The optical and electrophysical properties of a new nanoheterogeneous material prepared by mixing nanoparticles of p-type (Cu2S) and n-type (CdS) semiconductors are studied in this work. Different manners of mixi...

D. Yu. Godovsky; P. Schilinsky; W. Caseri; P. Smith

2010-08-01T23:59:59.000Z

447

A Polarized Neutron Scattering Study of the Normal Phase in YBa2Cu3O6.95  

Science Journals Connector (OSTI)

Polarized neutron scattering with polarization analysis has revealed negligible magnetic scattering up to 30 meV in the normal...2Cu3O6.95 indicating the absence of local moments.

T. J. Smith; K. H. Andersen; U. Beck; H. Capellmann

1999-02-01T23:59:59.000Z

448

Experimental Investigation of a CuO/Al2O3 Oxygen Carrier for Chemical-Looping Combustion  

Science Journals Connector (OSTI)

Experimental Investigation of a CuO/Al2O3 Oxygen Carrier for Chemical-Looping Combustion ... Industrial & Engineering Chemistry Research (1999), 38 (1), 126-132 CODEN: IECRED; ISSN:0888-5885. ...

Sander Noorman; Fausto Gallucci; Martin van Sint Annaland; Hans J. A. M. Kuipers

2010-09-17T23:59:59.000Z

449

Kinetics of the Reduction of CuO/Bentonite by Methane (CH4) during Chemical Looping Combustion  

Science Journals Connector (OSTI)

Kinetics of the Reduction of CuO/Bentonite by Methane (CH4) during Chemical Looping Combustion ... The Journal of Physical Chemistry C2014 118 (37), 21532-21540 ...

Esmail R. Monazam; Ranjani Siriwardane; Ronald W. Breault; Hanjing Tian; Lawrence J. Shadle; George Richards; Stephen Carpenter

2012-03-08T23:59:59.000Z

450

Evaluation of CuAl2O4 as an Oxygen Carrier in Chemical-Looping Combustion  

Science Journals Connector (OSTI)

Evaluation of CuAl2O4 as an Oxygen Carrier in Chemical-Looping Combustion ... Department of Chemical and Biological Engineering, Division of Environmental Inorganic Chemistry, Chalmers University of Technology, SE-412 96 Gteborg, Sweden ...

Mehdi Arjmand; Abdul-Majeed Azad; Henrik Leion; Tobias Mattisson; Anders Lyngfelt

2012-10-03T23:59:59.000Z

451

High resolution microstructure analysis of the decomposition of Cu{sub 90}CO{sub 10} alloys  

SciTech Connect (OSTI)

Homogeneous Cu-Co alloys with a Co concentration up to 10 at.% Co are prepared by rapid quenching. This allows for the first time the investigation of the decomposition process of the Cu{sub 90}Co{sub 10} supersaturated solid solution on a nanometer scale using a combination of atom probe/field ion microscopy (AP/FIM) analyses and transmission electron microscopy. Annealing of a Cu{sub 90}Co{sub 10} alloy at 440 C for various times leads to a compositional modulated microstructure. The composition profiles determined by AP/FIM analyses clearly exclude a classical nucleation and growth behavior and instead suggest a spinodal type decomposition whereby the compositions of the precipitates continuously increase. In contrast, at the grain boundaries of the Cu{sub 90}Co{sub 10} alloy heterogeneous nucleation of pure Co particles is observed.

Busch, R.; Gaertner, F.; Borchers, C.; Haasen, P. [Univ. Goettingen (Germany). Inst. fuer Metallphysik] [Univ. Goettingen (Germany). Inst. fuer Metallphysik; Bormann, R. [GKSS-Research Center, Geesthacht (Germany). Inst. for Materials Research] [GKSS-Research Center, Geesthacht (Germany). Inst. for Materials Research

1996-06-01T23:59:59.000Z

452

(n,n?[gamma]) reactions in 6?3?,?6?5?Cu and background in 0[nu] [beta] [beta] experiments  

E-Print Network [OSTI]

Measurements of (n, xn?[gamma]) reactions in Cu are important for understanding neutroninduced background for certain underground double beta decay experiments. Neutroninduced gammas are a contribution to background for ...

Perepelitsa, Dennis V

2008-01-01T23:59:59.000Z

453

Three approaches to economical photovoltaics: conformal Cu2S, organic luminescent films, and PbSe nanocrystal superlattices  

E-Print Network [OSTI]

Degradation in CDS-Cu2S photovoltaic cells. Semiconductorcell with cuins2: A photovoltaic cell concept using an ex-and the the photovoltaic action in solar cell devices. The

Carbone, Ian Anthony

2013-01-01T23:59:59.000Z

454

Study On Magnetic Shielding Type Superconducting Fault Current Limiter Using Bi-Sr-Ca-Cu-O Cylinder  

Science Journals Connector (OSTI)

The power application of a superconductor to restrain a fault current has been researched. A superconducting fault current limiter using a Bi-Sr-Ca-Cu-O cylinder has been developed. This limiter consists of the p...

Michiharu Ichikawa; Hiroyuki Kado; Kunikazu Izumi

1994-01-01T23:59:59.000Z

455

Preparation of Cu nanoparticle loaded SBA-15 and their excellent catalytic activity in reduction of variety of dyes  

Science Journals Connector (OSTI)

Abstract In this paper, we report a simple aqueous solution based chemical method for preparation of Cu nanoparticle loaded mesoporous silica SBA-15 (Cu@SBA-15) catalysts. Synthesized catalysts were characterized by powder X-ray diffraction (XRD), atomic absorption spectroscopy (AAS), Fourier transform infrared spectroscopy (FTIR), high resolution transmission electron microscope (HRTEM), N2 adsorptiondesorption surface area and pore size analyzer, and particle size analyzer. Catalytic activity of Cu nanoparticle loaded SBA-15 towards reduction of various dyes, such as 4-nitrophenol, Methyl Orange, Congo Red, Rhodamine B, Methylene Blue and mixture of dyes were investigated in the presence of excess NaBH4. Catalysis reactions were monitored by employing UVvis spectroscopy. Catalysis reactions followed pseudo-first order rate equation. These catalysts exhibited excellent catalytic activity and convenient recycling. The high catalytic activity, cost effectiveness and simple preparation methodology make 12.5Cu@SBA-15 an attractive catalyst for decolorization of organic dyes.

Barun Kumar Ghosh; Subhenjit Hazra; Bhanudas Naik; Narendra Nath Ghosh

2015-01-01T23:59:59.000Z

456

Angle-resolved photoemission spectroscopy study of HgBa[subscript 2]CuO[subscript 4+?  

E-Print Network [OSTI]

HgBa[subscript 2]CuO[subscript 4+?]. (Hg1201) has been shown to be a model cuprate for scattering, optical, and transport experiments, but angle-resolved photoemission spectroscopy (ARPES) data are still lacking owing to ...

Chan, M. K.

457

Investigation of defect properties in Cu(In,Ga)Se2 solar cells by deep-level transient spectroscopy  

E-Print Network [OSTI]

Investigation of defect properties in Cu(In,Ga)Se2 solar cells by deep-level transient spectroscopy defect levels in absorber materials, and may be used to support the identification of remedial processing

Anderson, Timothy J.

458

Thermoanalytical Studies of Ga-substituted MBa2Cu3O7? Superconducting Compounds Formation (M=Yb, Eu)  

Science Journals Connector (OSTI)

A thermoanalytical study in non-isothermal conditions was realized on Ga-substituted MBa2Cu3O7-? superconducting compounds formation (M=Yb, Eu). The presence of different oxides in the reaction mixtures leads to ...

R. Redac; M. Zaharescu

459

Johillerit, Na(Mg, Zn)3 Cu(AsO4)3, ein neues Mineral aus Tsumeb, Namibia  

Science Journals Connector (OSTI)

Electron microprobe analysis of the new mineral johillerite gave Na2O 5.4, MgO 18.3, ZnO 5.4, CuO 15.8, and As2O5 55.8, total 100.7%. From this result, the ideal formula is given as Na(Mg, Zn)3 Cu(AsO4)3. Johille...

Prof. Dr. P. Keller; Prof. Dr. H. Hess

1982-01-01T23:59:59.000Z

460

Synthesis and Evaluation of Cu-SAPO-34 Catalysts for Ammonia Selective Catalytic Reduction. 1. Aqueous Solution Ion Exchange  

Science Journals Connector (OSTI)

selective catalytic reduction; chabazite; SAPO-34; Cu-SAPO-34; diesel engine; emission control; NOx ... NOx storage-reduction (NSR) and selective catalytic reduction (SCR) are leading NOx emission control techniques for such lean-burn diesel engines. ... (8, 47) However, severe intracrystalline mass-transfer limitations for Cu-SSZ-13, due apparently to the small-pore opening structure of Chabazite, complicates such fundamental studies. ...

Feng Gao; Eric D. Walter; Nancy M. Washton; Jnos Szanyi; Charles H. F. Peden

2013-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "bermuda cu cuba" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

DETERMINATION OF BACK CONTACT BARRIER HEIGHT IN Cu(In,Ga)(Se,S)2 AND CdTe SOLAR CELLS  

E-Print Network [OSTI]

DETERMINATION OF BACK CONTACT BARRIER HEIGHT IN Cu(In,Ga)(Se,S)2 AND CdTe SOLAR CELLS Galymzhan T to quantify the energy barrier for holes between a Cu(In,Ga)(Se,S)2 (CIGSeS) or CdTe absorber and the back effectively kill the performance of the cell. Many CIGSeS and CdTe cells, however, do have a back

Sites, James R.

462

Laser Cladding of Quasi-Crystal-Forming Al-Cu-Fe-Bi on an Al-Si Alloy Substrate  

E-Print Network [OSTI]

Laser Cladding of Quasi-Crystal-Forming Al-Cu-Fe-Bi on an Al-Si Alloy Substrate KRISHANU BISWAS substrates. A two-step process of cladding followed by remelting is used to fine-tune the alloying, phase distribution, and microstructure. A powder mix of Al64Cu22.3Fe11.7Bi2 has been used to form the clads

Srivastava, Kumar Vaibhav

463

Temperature-dependent structure, elasticity, and entropic stability of Bi phases on Cu{111}  

Science Journals Connector (OSTI)

We have used low energy electron microscopy (LEEM) to characterize the structure and stability of Bi phases on Cu{111}. As a function of temperature we find that the Cu{111}(33)R30?-Bi surface alloy phase gradually dealloys and is fully depleted from Bi at a temperature of 803 K. The dealloying leads to a defect induced change of its elastic properties. The Bi surface alloy phase coexists with a Bi overlayer phase that exhibits a sharp decrease in density in a narrow temperature interval just below the temperature where the surface alloy phase has fully dealloyed. LEEM is used to directly evaluate the structure as well as the entropic contributions that determine the stability of each of the phases.

R. van Gastel; D. Kaminski; E. Vlieg; B. Poelsema

2014-02-25T23:59:59.000Z

464

Single crystal growth and characterization of the large-unit-cell compound Cu13Ba  

SciTech Connect (OSTI)

Single crystals of Cu13Ba were successfully grown out of BaCu self flux. Temperature dependent magnetization, M (T ), electrical resistivity, ?(T)?(T), and specific heat, Cp(T)Cp(T), data are reported. Isothermal magnetization measurements, M(H)M(H), show clear de Haas-van Alphen oscillations at T = 2 K for applied fields as low as View the MathML source?0H=1T. An anomalous behavior of the magnetic susceptibility is observed up to T ? 50 K reflecting the effect of de Haas-van Alphen oscillations at fairly high temperatures. The field- and temperature-dependencies of the magnetization indicate the presence of diluted magnetic impurities with a concentration of the order of 0.01 at.%. Accordingly, the minimum and lower temperature rise observed in the electrical resistivity at and below T = 15 K is attributed to the Kondo-impurity effect.

Jesche, Anton [Ames Laboratory; Budko, Serguei L. [Ames Laboratory; Canfield, Paul C. [Ames Laboratory

2013-10-31T23:59:59.000Z

465

Adaptive kinetic Monte Carlo simulation of methanol decomposition on Cu(100)  

SciTech Connect (OSTI)

The adaptive kinetic Monte Carlo method was used to calculate the dynamics of methanol decomposition on Cu(100) at room temperature over a time scale of minutes. Mechanisms of reaction were found using min-mode following saddle point searches based upon forces and energies from density functional theory. Rates of reaction were calculated with harmonic transition state theory. The dynamics followed a pathway from CH3-OH, CH3-O, CH2-O, CH-O and finally C-O. Our calculations confirm that methanol decomposition starts with breaking the O-H bond followed by breaking C-H bonds in the dehydrogenated intermediates until CO is produced. The bridge site on the Cu(100) surface is the active site for scissoring chemical bonds. Reaction intermediates are mobile on the surface which allows them to find this active reaction site. This study illustrates how the adaptive kinetic Monte Carlo method can model the dynamics of surface chemistry from first principles.

Xu, Lijun; Mei, Donghai; Henkelman, Graeme A.

2009-12-31T23:59:59.000Z

466

Crystallization from high temperature solutions of Si in Cu/Al solvent  

DOE Patents [OSTI]

A liquid phase epitaxy method is disclosed for forming thin crystalline layers of device quality silicon having less than 3{times}10{sup 16} Cu atoms/cc impurity, comprising: preparing a saturated liquid solution of Si in a Cu/Al solvent at about 20 to about 40 at. % Si at a temperature range of about 850 to about 1100 C in an inert gas; immersing or partially immersing a substrate in the saturated liquid solution; super saturating the solution by lowering the temperature of the saturated solution; holding the substrate in the saturated solution for a period of time sufficient to cause Si to precipitate out of solution and form a crystalline layer of Si on the substrate; and withdrawing the substrate from the solution. 3 figs.

Ciszek, T.F.; Wang, T.

1996-08-13T23:59:59.000Z

467

Inhomogeneous magnetism in the doped kagome lattice of LaCuO2.66  

SciTech Connect (OSTI)

The hole-doped kagome lattice of Cu2+ ions in LaCuO2.66 was investigated by nuclear quadrupole resonance (NQR), electron spin resonance (ESR), electrical resistivity, bulk magnetization and specific heat measurements. For temperatures above 180 K, the spin and charge properties show an activated behavior suggestive of a narrow-gap semiconductor. At lower temperatures, the results indicate an insulating ground state which may or may not be charge ordered. While the frustrated spins in remaining patches of the original kagome lattice might not be directly detected here, the observation of coexisting non-magnetic sites, free spins and frozen moments reveals an intrinsically inhomogeneous magnetism. Numerical simulations of a 1/3-diluted kagome lattice rationalize this magnetic state in terms of a heterogeneous distribution of cluster sizes and morphologies near the site-percolation threshold.

Julien, M.-H. [Laboratoire National des Champs Magnetiques Intenses; Simonet, V [Institut Neel, CNRS-UJF; Canals, B. [Institut Neel, CNRS-UJF; Garlea, Vasile O [ORNL; Bordet, Pierre [Laboratoire of Cristallographie, Grenoble; Darie, Celine [Laboratoire of Cristallographie, Grenoble

2013-01-01T23:59:59.000Z

468

Selective adsorption and electronic interaction of F16CuPc on epitaxial graphene  

Science Journals Connector (OSTI)

We investigate the electronic coupling between copper hexadecafluoro-phthalocyanine (F16CuPc) and epitaxial graphene (EG) on 6H-SiC(0001) using a combined approach of low-temperature scanning tunneling spectroscopy and electronic structure calculations. The molecules are preferentially adsorbed on monolayer EG than bilayer EG. Competing molecule-surface and intermolecular van der Waals interactions result in two well-ordered incommensurate phases. We show that the amount of charge transfer from EG to F16CuPc can be tuned by applied voltage or the thickness of graphene layers. A characteristic feature at ?0.4?eV above the Dirac point is identified in bilayer EG, which indicates its electronic structure is modified via introducing extra unoccupied states upon adsorption.

Yi-Lin Wang; Jun Ren; Can-Li Song; Ye-Ping Jiang; Li-Li Wang; Ke He; Xi Chen; Jin-Feng Jia; Sheng Meng; Efthimios Kaxiras; Qi-Kun Xue; Xu-Cun Ma

2010-12-14T23:59:59.000Z

469

Hole depletion of ladders in Sr14Cu24O41 induced by correlation effects  

Science Journals Connector (OSTI)

The hole distribution in Sr14Cu24O41 is studied by low-temperature polarization-dependent O K near-edge x-ray absorption fine-structure measurements and state-of-the-art electronic structure calculations that include core-hole and correlation effects in a mean-field approach. Contrary to all previous analysis, based on semiempirical models, we show that correlations and antiferromagnetic ordering favor the strong chain-hole attraction. For the remaining small number of holes accommodated on ladders, leg sites are preferred to rung sites. The small hole affinity of rung sites explains naturally the one-dimensional to two-dimensional crossover in the phase diagram of (La,Y,Sr,Ca)14Cu24O41.

V. Ilakovac; C. Gougoussis; M. Calandra; N. B. Brookes; V. Bisogni; S. G. Chiuzbaian; J. Akimitsu; O. Milat; S. Tomi?; C. F. Hague

2012-02-07T23:59:59.000Z

470

Microwave-assisted synthesis of CuO/ZnO and CuO/ZnO/Al2O3 precursors using urea hydrolysis  

Science Journals Connector (OSTI)

Binary CuO/ZnO and ternary CuO/ZnO/Al2O3 catalysts have been rapidly synthesized in a multimode microwave oven by the homogeneous precipitation of aurichalcite and hydrotalcite-like precursors using urea hydrolysis. For purposes of comparison, the same catalysts were prepared under conventional heating. The corresponding metal nitrates were mixed with various amounts of urea to yield different urea/(?M+) molar ratios. The precipitation proceeded stepwise, copper being the first metal to be hydrolyzed. It was found that the higher the urea content, the higher the alkalinization of the solution, an effect which favored the precipitation of Zn (II) (the most pH dependent metal), and in turn, the synthesis of aurichalcite and hydrotalcite-like precursors. Microwave-synthesized catalysts presented similar characteristics to those obtained under conventional heating, but in considerably reduced aging times. Microwave radiation proved to be more efficient than conventional heating under harsh conditions of precipitation, i.e., lower molar ratios of urea with respect to the metal cations in the solution.

Y. Fernndez; J.A. Menndez; A. Arenillas; E. Fuente; J.H. Peng; Z.B. Zhang; W. Li; Z.Y. Zhang

2009-01-01T23:59:59.000Z

471

Superconductivity in La1.56Sr0.44CuO4/La2CuO4 Superlattices  

SciTech Connect (OSTI)

Superlattices of the repeated structure La{sub 1.56}Sr{sub 0.44}CuO{sub 4}/La{sub 2}CuO{sub 4} (LSCO-LCO), where none of the constituents is superconducting, show a superconducting transition of T{prime}{sub c} 25 K. In order to elucidate the nature of the superconducting state we have performed a low-energy {mu}SR study. By applying a magnetic field parallel (Meissner state) and perpendicular (vortex state) to the film planes, we could show that superconductivity is sheet like, resulting in a very anisotropic superconducting state. This result is consistent with a simple charge-transfer model, which takes into account the layered structure and the difference in the chemical potential between LCO and LSCO, as well as Sr interdiffusion. Using a pancake-vortex model we could estimate a strict upper limit of the London penetration depth to 380 nm in these superlattices. The temperature dependence of the muon depolarization rate in field cooling experiments is very similar to what is observed in intercalated BSCCO and suggests that vortex-vortex interaction is dominated by electromagnetic coupling but negligible Josephson interaction.

Bozovic I.; Suter, A.; Morenzoni, E.; Prokscha, T.; Luetkens, H.; Wojek, B.M.; Logvenov, G.; Gozar, A.

2011-12-01T23:59:59.000Z

472

Effects of alternating seawater flow and stagnant layup conditions on the general and localized corrosion resistance of CuNi and NiCu alloys in marine service  

SciTech Connect (OSTI)

From time-to-time seawater handling systems are subjected to lay-up which can produce chemical and biological changes, and conceivably alter the corrosion resistance of metals used in piping and other equipment. In the case of reverse osmosis/membrane technology type desalination equipment, sanitizing agents may be introduced after draining. Simulation tests were conducted to determine any effect of a bisulfite sanitizing treatment when used between periods of normal seawater flow. Corresponding tests were conducted with lay-up comprising non-refreshed seawater which ultimately stagnated. Test results for CuNi alloy C71500 indicted that repeated cycling between seawater exposure and bisulfite treatments was detrimental in reducing that alloy`s resistance to general corrosion, and to a lesser degree its crevice corrosion resistance. The typical pitting and crevice corrosion behavior of NiCu alloy N04400, found upon exposure to slowly moving, aerated seawater was neither diminished or accelerated by cyclic lay-up with either stagnant seawater or the candidate bisulfite-containing solution. However, some increase in general corrosion was observed.

Kain, R.M. [LaQue Corrosion Services, Wrightsville Beach, NC (United States); Weber, B.E. [NAWC-Aircraft Div., Patuxent River, MD (United States)

1997-12-01T23:59:59.000Z

473

Surface roughening, columnar growth and intrinsic stress formation in amorphous CuTi films  

SciTech Connect (OSTI)

The growth of amorphous CuTi films, prepared by electron beam evaporation, is investigated by Scanning Tunneling Microscopy (STM), Small Angle Neutron Scattering (SANS) and in situ measurements of intrinsic mechanical stresses (ISM). In early growth stages the films develop compressive stresses and, with increasing film thickness, a crossover to tensile stresses. In the same thickness range the STM investigations show a change in the growth mode. The experiments suggest a transition from planar growth with statistical surface roughening to columnar growth.

Huelsen, U.V.; Geyer, U. [Physikalisches Inst., Goettingen (Germany); Thiyagarajan, P. [Argonne National Lab., IL (United States)

1997-11-01T23:59:59.000Z

474

Microstructure and stability of TiB sub 2 and Cu multilayers  

SciTech Connect (OSTI)

The interfacial stability of a high strength TiB{sub 2}/Cu multilayer structure was examined by subjecting the layers to ion irradiation by 400 keV Ne{sup ++} ions up to a maximum dose of 12 {times} 10 {sup 15} ions/cm{sup 2}. Even at the highest dose, with maximum dpa value of 4.92, the explained by examining the maximum thermodynamic driving force for interfacial reactions in this system. 7 refs., 3 figs.

Basu, S.N.; Hubbard, K.M.; Hirvonen, J.-P.; Mitchell, T.E.; Nastasi, M.

1990-01-01T23:59:59.000Z

475

Angle-resolved photoemission studies of single-crystal YBa2Cu3O7-x  

Science Journals Connector (OSTI)

We present the first angle-resolved photoemission and low-energy electron-diffraction (LEED) results obtained from clean single-crystal YBa2Cu3O7-x (001) surfaces prepared by cleaving in a vacuum. The surfaces exhibit (11)-ordered LEED patterns, but many of the photoemission features exhibit little or no angular dependence. The most important exception is the upper spectral edge, which shows angular dispersion and a strong photon energy dependence.

N. G. Stoffel; Y. Chang; M. K. Kelly; L. Dottl; M. Onellion; P. A. Morris; W. A. Bonner; G. Margaritondo

1988-05-01T23:59:59.000Z

476

Integration of Calcium and Chemical Looping Combustion using Composite CaO/CuO-Based Materials  

Science Journals Connector (OSTI)

In oxy-fuel combustion, fuel is combusted in pure oxygen rather than air. ... Shen, L.; Wu, J.; Xiao, J.Experiments on Chemical Looping Combustion of Coal with a NiO Based Oxygen Carrier Combust. ... Abanades, J. C.; Murillo, R.; Fernandez, J. R.; Grasa, G.; Martinez, I.New CO2 Capture Process for Hydrogen Production Combining Ca and Cu Chemical Loops Environ. ...

Vasilije Manovic; Edward J. Anthony

2011-10-24T23:59:59.000Z

477

Low energy ($p,?$) reactions in Ni and Cu nuclei using microscopic optical model  

E-Print Network [OSTI]

Radiative capture reactions for low energy protons have been theoretically studied for Ni and Cu isotopes using the microscopic optical model. The optical potential has been obtained in the folding model using different microscopic interactions with the nuclear densities from Relativistic Mean Field calculations. The calculated total cross sections as well as the cross sections for individually low lying levels have been compared with measurements involving stable nuclear targets. Rates for the rapid proton capture process have been evaluated for astrophysically important reactions.

G. Gangopadhyay

2010-08-05T23:59:59.000Z

478

Dynamics of Composite Haldane Spin Chains in IPA-CuCl3  

SciTech Connect (OSTI)

Magnetic excitations in the quasi-one-dimensional antiferromagnet IPA-CuCl{sub 3} are studied by cold neutron inelastic scattering. Strongly dispersive gap excitations are observed. Contrary to previously proposed models, the system is best described as an asymmetric quantum spin ladder. The observed spectrum is interpreted in terms of composite Haldane spin chains. The key difference from actual S = 1 chains is a sharp cutoff of the single-magnon spectrum at a certain critical wave vector.

Masuda, Takatsugu [ORNL; Zheludev, Andrey I [ORNL; Manaka, H. [Kagoshima University, Kagoshima JAPAN; Regnault, L.-P. [CEA, Grenoble, France; Chung, J.-H. [National Institute of Standards and Technology (NIST); Qiu, Y. [National Institute of Standards and Technology (NIST)

2006-01-01T23:59:59.000Z

479

The 63Cu(?, p)66Zn cross section and the corresponding thermonuclear reaction rate  

Science Journals Connector (OSTI)

Differential cross sections and excitation functions for the reaction 63Cu(?, p)66Zn have been measured over the energy range E? = 610 MeV. Results of statistical model calculations are compared to the excitation functions for individual proton groups and are found to give good representations to within about a factor of two. The data and the calculated cross sections are used to determine the thermonuclear reaction rates for temperatures of astrophysical interest.

M.S. Islam; R.N. Boyd; P.B. Corn; D.P. Rath; X. Gu; G.W. Kolnicki

1989-01-01T23:59:59.000Z

480

Process and properties of electroless Ni-Cu-P-ZrO{sub 2} nanocomposite coatings  

SciTech Connect (OSTI)

Highlights: Black-Right-Pointing-Pointer The Ni-P and Ni-P-Cu-ZrO{sub 2} coatings were produced by electroless technique. Black-Right-Pointing-Pointer The influence of copper and ZrO{sub 2} nanoparticles on Ni-P was studied. Black-Right-Pointing-Pointer Surface morphology, structure and electrochemical behavior were evaluated. Black-Right-Pointing-Pointer The Ni-Cu-P-ZrO{sub 2} and Ni-P-ZrO{sub 2} coatings are more resistant to corrosion than Ni-P. Black-Right-Pointing-Pointer Introduction of Cu and ZrO{sub 2} in the matrix aids to the enhancement of microhardness. -- Abstract: Electroless Ni-Cu-P-ZrO{sub 2} composite coating was successfully obtained on low carbon steel matrix by electroless plating technique. Coatings with different compositions were obtained by varying copper as ternary metal and nano sized zirconium oxide particles so as to obtain elevated corrosion resistant Ni-P coating. Microstructure, crystal structure and composition of deposits were analyzed by SEM, EDX and XRD techniques. The corrosion behavior of the deposits was studied by anodic polarization, Tafel plots and electrochemical impedance spectroscopy (EIS) in 3.5% sodium chloride solution. The ZrO{sub 2} incorporated Ni-P coating showed higher corrosion resistance than plain Ni-P. The introduction of copper metal into Ni-P-ZrO{sub 2} enhanced the protection ability against corrosion. The influence of copper metal and nanoparticles on microhardness of coatings was evaluated.

Ranganatha, S. [Department of Studies in Chemistry, School of Chemical Sciences, Kuvempu University, Shankaraghatta 577451, Shimoga, Karnataka (India)] [Department of Studies in Chemistry, School of Chemical Sciences, Kuvempu University, Shankaraghatta 577451, Shimoga, Karnataka (India); Venkatesha, T.V., E-mail: drtvvenkatesha@yahoo.co.uk [Department of Studies in Chemistry, School of Chemical Sciences, Kuvempu University, Shankaraghatta 577451, Shimoga, Karnataka (India); Vathsala, K. [Nanotribology Laboratory, Mechanical engineering department, Indian Institute of Science, Bangalore (India)] [Nanotribology Laboratory, Mechanical engineering department, Indian Institute of Science, Bangalore (India)

2012-03-15T23:59:59.000Z

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481

Production of .sup.64 Cu and other radionuclides using a charged-particle accelerator  

DOE Patents [OSTI]

Radionuclides are produced according to the present invention at commercially significant yields and at specific activities which are suitable for use in radiodiagnostic agents such as PET imaging agents and radiotherapeutic agents and/or compositions. In the method and system of the present invention, a solid target having an isotopically enriched target layer electroplated on an inert substrate is positioned in a specially designed target holder and irradiated with a charged-particle beam. The beam is preferably generated using an accelerator such as a biomedical cyclotron at energies ranging from about 5 MeV to about 25 MeV. The target is preferably directly irradiated, without an intervening attenuating foil, and with the charged particle beam impinging an area which substantially matches the target area. The irradiated target is remotely and automatically transferred from the target holder, preferably without transferring any target holder subassemblies, to a conveyance system which is preferably a pneumatic or hydraulic conveyance system, and then further transferred to an automated separation system. The system is effective for processing a single target or a plurality of targets. After separation, the unreacted target material can be recycled for preparation of other targets. In a preferred application of the invention, a biomedical cyclotron has been used to produce over 500 mCi of .sup.64 Cu having a specific activity of over 300 mCi/.mu.g Cu according to the reaction .sup.64 Ni(p,n).sup.64 Cu. These results indicate that accelerator-produced .sup.64 Cu is suitable for radiopharmaceutical diagnostic and therapeutic applications.

Welch, Michael J. (Creve Couer, MO); McCarthy, Deborah W. (Maryland Heights, MO); Shefer, Ruth E. (Newton, MA); Klinkowstein, Robert E. (Winchester, MA)

2000-01-01T23:59:59.000Z

482

An In-Situ XAS Study of the Structural Changes in a CuO-CeO2/Al2O3 Catalyst during Total Oxidation of Propane  

SciTech Connect (OSTI)

A CuOx-CeOx/Al2O3 catalyst was studied with in-situ transmission Cu K XAS for the total oxidation of propane as model reaction for the catalytic elimination of volatile organic compounds. The local Cu structure was determined for the catalyst as such, after pre-oxidation and after reduction with propane. The catalyst as such has a local CuO structure. No structural effect was observed upon heating in He up to 600 deg. C or after pre-oxidation at 150 deg. C. A full reduction of the Cu2+ towards metallic Cu0 occurred, when propane was fed to the catalyst. The change in local Cu structure during propane reduction was followed with a time resolution of 1 min. The {chi}(k) scans appeared as linear combinations of start and end spectra, CuO and Cu structure, respectively. However, careful examination of the XANES edge spectra indicates the presence of a small amount of additional Cu1+ species.

Silversmith, Geert; Poelman, Hilde; Poelman, Dirk; Gryse, Roger de [Ghent University, Department of Solid State Sciences, Krijgslaan 281 S1, B-9000 Gent (Belgium); Olea, Maria; Balcaen, Veerle; Heynderickx, Philippe; Marin, Guy B. [Ghent University, Laboratorium voor Petrochemische Techniek, Krijgslaan 281 S5, B-9000 Gent (Belgium)

2007-02-02T23:59:59.000Z

483

Promoting effect of polyoxyethylene octylphenol ether on Cu/ZnO catalysts for low-temperature methanol synthesis  

Science Journals Connector (OSTI)

Cu/ZnO catalysts were prepared by the co-precipitation method with the addition of OP-10 (polyoxyethylene octylphenol ether) and were chemically and structurally characterized by means of XRD, BET, H2-TPR, CO-TPD and N2O-titration. The effect of OP-10 addition on the activity of Cu/ZnO for the slurry phase methanol synthesis at 150 C was evaluated. The results showed that Cu/ZnO prepared with addition of 8% OP-10 (denoted as C8) exhibited the promoted activity for the methanol synthesis. The conversion of CO and the STY (space time yield) of methanol were 42.5% and 74.6% higher than those of Cu/ZnO prepared without addition of OP-10 (denoted as C0), respectively. The precursor of C8 contained more aurichalcite and rosasite, and the concerted effect of Cu-Zn in C8 was found to be stronger than that in C0. Compared with C0, C8 showed smaller particle size, lower reduction temperature and larger BET and Cu surface areas.

Ling Liu; Tiansheng Zhao; Qingxiang Ma; Yufang Shen

2009-01-01T23:59:59.000Z

484

Raman spectra of oriented and non-oriented Cu hydroxy-phosphate minerals: Libethenite, cornetite, pseudomalachite, reichenbachite and ludjibaite  

Science Journals Connector (OSTI)

Abstract Oriented cornetite [Cu3PO4(OH)3], libethenite [Cu2PO4(OH)] and pseudomalachite [Cu5(PO4)2(OH)4] and non-oriented reichenbachite [Cu5(PO4)2(OH)4] and ludjibaite [Cu5(PO4)2(OH)4] minerals from ?ubietov and pania Dolina dump fields, Bansk Bystrica, Slovakia were examined by polarized Raman spectroscopy. The examined minerals display the characteristic vibrational modes of PO4 and OH groups and further lattice modes. The PO4 stretching and bending vibrations of the investigated minerals occur between 1150 and 900cm?1 and between 700 and 350cm?1, respectively. On the other hand, the hydroxyl group stretching and bending modes appear above 3350cm?1 and between 900 and 700cm?1, respectively. The lattice vibrations occur below 350cm?1. The different bond distances of the PO4 groups readily explain the shift of the bands to higher or lower wavenumbers among the studied Cu hydroxy-phosphate minerals.

Sherif Kharbish; Peter Andr; Jarmila Luptkov; Stanislava Milovsk

2014-01-01T23:59:59.000Z

485

Duplex Oxide Formation during Transient Oxidation of Cu-5%Ni(001) Investigated by In situ UHV-TEM and XPS  

SciTech Connect (OSTI)

The transient oxidation stage of a model metal alloy thin film was characterized with in situ ultra-high vacuum (UHV) transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and analytic high-resolution TEM. We observed the formations of nanosized NiO and Cu{sub 2}O islands when Cu-5a5%Ni(100) was exposed to oxygen partial pressure, pO{sub 2} = 1 x 10{sup -4} Torr and various temperatures in situ. At 350 C epitaxial Cu{sub 2}O islands formed initially and then NiO islands appeared on the surface of the Cu{sub 2}O island, whereas at 750 C NiO appeared first. XPS and TEM was used to reveal a sequential formation of NiO and then Cu{sub 2}O islands at 550 C. The temperature-dependant oxide selection may be due to an increase of the diffusivity of Ni in Cu with increasing temperature.

Yang, J.C.; Starr, D.; Kang, Y.; Luo, L.; Tong, X.; Zhou, G.

2012-05-20T23:59:59.000Z

486

Catalytic behavior of ternary Cu/ZnO/Al2O3 systems prepared by homogeneous precipitation in water-gas shift reaction  

Science Journals Connector (OSTI)

Ternary Cu/ZnO/Al2O3 catalysts have been prepared by homogeneous precipitation (hp) using urea hydrolysis and tested for the water-gas shift reaction. The Cu/Zn ratio was fixed at 1/1, and the effects of the Al addition on the precipitation procedure, the precursor structure and the catalytic activity have been studied. The precipitation proceeded stepwise; Cu(II) nitrate was first hydrolyzed, followed by the hydrolysis of Zn(II) nitrate, but the final compounds consist mainly of aurichalcite. It is likely that amorophous Cu(OH)2 formed first was converted to aurichalcite via a dissolution-reprecipitation mechanism assisted by Zn(II). A significant leaching of Cu took place with increasing Al content during the precipitation at 90C. The Cu leaching was effectively suppressed by lowering the temperature to 80C, but resulting in a slight decrease in the catalytic activity. In the hp-catalyst precursors, aurichalcite was always observed as the main component, whereas hydrotalcite and malachite appeared with increasing Al component. The catalytic activity increased by the addition of 5mol% of Al and decreased with further addition of Al. The activity apparently depended on the Cu metal surface area on the catalyst, but the turn over frequency calculated based on the surface Cu metal significantly varied depending on the Al content. Moreover, the intensity of the reduction peak around 225C assigned to Cu2+?Cu+ in the TPR well correlated with the catalytic activity. It is suggested that Cu/Zn bimetallic aurichalcite has an important role as the catalyst precursor and the reductionoxidation between Cu+ and Cu0 plays in the catalytic mechanism of the shift reaction.

Ikuo Atake; Kazufumi Nishida; Dalin Li; Tetsuya Shishido; Yasunori Oumi; Tsuneji Sano; Katsuomi Takehira

2007-01-01T23:59:59.000Z

487

Characterization of CeO2-Supported Cu-Pd Bimetallic Catalyst for the Oxygen-Assisted Water-Gas Shift Reaction  

SciTech Connect (OSTI)

This study was focused to investigate the roles of Cu and Pd in CuPd/CeO2 bimetallic catalysts containing 20-30 wt% Cu and 0.5-1 wt% Pd used in the oxygen-assisted water-gas shift (OWGS) reaction employing a combined bulk and surface characterization techniques such as XRD, TPR, CO chemisorption, and in-situ XPS. The catalytic activity for CO conversion and the stability of catalyst during on-stream operation increased by the addition of Cu to Pd/CeO2 or Pd to Cu/CeO2 monometallic catalysts, especially when the OWGS reaction was performed under low temperatures, below 200oC. The bimetallic catalyst after leaching with nitric acid retained about 60% of its original activity. The TPR of monometallic Cu/CeO2 showed reduction of CuO supported on CeO2 in two distinct regions, around 150 and 250oC. The high temperature peak disappeared and reduction occurred in a single step around 150oC upon Pd addition. The Pd dispersion decreased from 38.5% for Pd/CeO2 to below 1% for CuPd/CeO2 bimetallic catalyst. In-situ XPS studies showed a shift in Cu 2p peaks toward lower binding energy (BE) with concommitant shift in the Pd 3d peaks toward higher BE. Addition of Pd decreased the surface Cu concentration while the concentration of Pd remained unaltered. All these observations indicated the formation of Cu-Pd surface alloy. The valence band XP spectra collected below 10 eV corroborated the core level XP spectra and indicated that Cu is mainly involved in the catalytic reaction. The improved catalytic activity and stability of CuPd/CeO2 bimetallic catalyst was attributed to the alloy formation.

Fox, Elise; Velu, Subramani; Engelhard, Mark H.; Chin, Ya-Huei; Miller, Jeffrey T.; Kropf, Jeremy; Song, Chunshan

2008-12-10T23:59:59.000Z

488

Electroactive complex in thermally treated Ge-Si <Cu, Al> crystals  

SciTech Connect (OSTI)

It is shown by Hall measurements that quenching complexly doped Ge{sub 1-x}Si{sub x}<Cu, Al> (0 {<=} x {<=} 0.20) crystals from 1050-1080 K leads to the formation of additional electroactive acceptor centers in them. The activation energy of these centers increases linearly with an increase in the silicon content in the crystal and is described by the relation E{sub k}{sup x} = (52 + 320x) meV. Annealing these crystals at 550-570 K removes the additional acceptor levels. It is established that the most likely model for the additional electroactive centers is a pair composed of substituent copper and aluminum atoms (Cu{sub s}Al{sub s}) or interstitial copper and substituent aluminum atoms (Cu{sub i}Al{sub s}). It is shown that the generation of additional deep acceptor levels must be taken into account when using the method of precise doping of Ge{sub 1-x}Si{sub x} crystals with copper.

Azhdarov, G. Kh., E-mail: zangi@physics.ab.az [Academy of Sciences of Azerbaijan, Institute of Physics (Azerbaijan); Zeynalov, Z. M. [Ganja State University (Azerbaijan); Zakhrabekova, Z. M. [Academy of Sciences of Azerbaijan, Institute of Physics (Azerbaijan); Kyazimova, A. I. [Ganja State University (Azerbaijan)

2010-05-15T23:59:59.000Z

489

Structural and magnetic properties of self assembled Fe-doped Cu{sub 2}O nanorods  

SciTech Connect (OSTI)

Cuprous oxide (Cu{sub 2}O) nanorods doped with iron impurities have been synthesized by the polyol method using sodium dodecyl sulfate as the surfactant. The X-ray diffraction measurement reveals the pure phase of simple cubic Cu{sub 2}O and the electron microscopy displays its one dimensional morphology. Ferromagnetism was observed at room temperature in the magnetic measurements of the doped samples while undoped sample exhibits only diamagnetism. Room temperature Moessbauer spectra for the samples exhibited only doublets but no sextet, which corresponds to the presence of paramagnetic iron sites. As magnetic moment contribution of the doped ions was insignificant for the observed magnetism, ferromagnetic property in the doped samples could have been originated from the defects as cation vacancies. Existence of the defects was supported by the room temperature photoluminescence spectra of the doped samples in reference to the undoped sample. - Ferromagnetism at room temperature was observed in the Fe doped Cu{sub 2}O nanorods. The origin seems to be the defects of cation vacancies created by the dopant ions.

Ahmed, Asar [Department of Chemistry, SL-214, Southern Laboratory, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh (India); Gajbhiye, Namdeo S., E-mail: nsg@iitk.ac.i [Department of Chemistry, SL-214, Southern Laboratory, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh (India); Kurian, S. [Department of Chemistry, SL-214, Southern Laboratory, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh (India)

2010-09-15T23:59:59.000Z

490

Cooperative Island Growth of Large Area Single-Crystal Graphene by Chemical Vapor Deposition on Cu  

SciTech Connect (OSTI)

We describe a two-step approach for suppressing nucleation of graphene on Cu using chemical vapor deposition. In the first step, as received Cu foils are oxidized in air at temperatures up to 500 C to remove surface impurities and to induce the regrowth of Cu grains during subsequent annealing in H2 flow at 1040 C prior to graphene growth. In the second step, transient reactant cooling is performed by using a brief Ar pulse at the onset of growth to induce collisional deactivation of the carbon growth species. The combination of these two steps results in a three orders of magnitude reduction in the graphene nucleation density, enabling the growth of millimeter-size single crystal graphene grains. A kinetic model shows that suppressing nucleation promotes a cooperative island growth mode that favors the formation of large area single crystal graphene, and it is accompanied by a roughly 3 orders of magnitude increase in the reactive sticking probability of methane compared to that in random nucleation growth.

Regmi, Murari [Oak Ridge National Laboratory (ORNL); Rouleau, Christopher [Oak Ridge National Laboratory (ORNL); Puretzky, Alexander A [ORNL; Ivanov, Ilia N [ORNL; Geohegan, David B [ORNL; Chen, Jihua [ORNL; Eastman, Jeffrey [Argonne National Laboratory (ANL); Eres, Gyula [ORNL

2014-01-01T23:59:59.000Z

491

Critical cooling rate and thermal stability of Zr--Ti--Cu--Ni--Be alloys  

SciTech Connect (OSTI)

The critical cooling rate as well as the thermal stability are measured for a series of alloys in the Zr--Ti--Cu--Ni--Be system. Upon cooling from the molten state with different rates, alloys with compositions ranging along a tie line from (Zr{sub 70}Ti{sub 30}){sub 55}(Ni{sub 39}Cu{sub 61}){sub 25}Be{sub 20} to (Zr{sub 85}Ti{sub 15}){sub 55}(Ni{sub 57}Cu{sub 43}){sub 22.5}Be{sub 27.5} show a continuous increase in the critical cooling rate to suppress crystallization. In contrast, thermal analysis of the same alloys shows that the undercooled liquid region, the temperature difference between the glass transition temperature and the crystallization temperature, is largest for some compositions midway between the two endpoints, revealing that glass forming ability does not correlate with thermal stability. The relationship between the composition-dependent glass forming ability and thermal stability is discussed with reference to a chemical decomposition process.

Waniuk, Theodore A.; Schroers, Jan; Johnson, William L.

2001-02-26T23:59:59.000Z

492

Cu- and Ag-modified cerium oxide catalysts for methane oxidation  

SciTech Connect (OSTI)

The catalytic activity of nanocrystalline doped ceria and Cu- and Ag-modified ceria for the complete oxidation of methane was studied in this work. The catalyst structure was studied by X-ray diffraction (XRD) and related to the availability of low-temperature oxygen species. Selected samples were also analyzed by STEM/EDX, HRTEM, and XPS. Temperature-programmed reduction (TPR) by H{sub 2} and CH{sub 4}, as well as oxygen chemisorption, measurements were used to characterize the different oxygen species present on the catalyst. La and Zr were used as dopants to modify the crystal size and reduction properties of ceria. Enhanced activity for the complete oxidation of methane is discussed in terms of ceria reducibility, crystal size, and formation of oxygen defects at the surface (extrinsic oxygen vacancies). Addition of transition metal oxides (CuO) or transition metals (Ag) improves the low-temperature oxidation activity of cerium oxide. The interaction of ceria with Ag and CuO is a strong function of the crystal size of ceria. In the presence of the transition metal or metal oxide, a small crystal size of ceria favors the formation of highly reducible oxygen species and enhances the methane oxidation activity.

Kundakovic, L.; Flytzani-Stephanopoulis, M. [Tufts Univ., Medford, MA (United States). Dept. of Chemical Engineering] [Tufts Univ., Medford, MA (United States). Dept. of Chemical Engineering

1998-10-01T23:59:59.000Z

493

Catalytic oxidation of ethyl acetate over La-Co and La-Cu oxides  

Science Journals Connector (OSTI)

Abstract Lanthanum-containing mixed oxides (La-Co and La-Cu) were synthesized by several methods: exotemplating, evaporation, glycine-nitrate and glycine-nitrate-exotemplating. Samples were characterized by thermogravimetry and differential scanning calorimetry, N2 adsorption, temperature programmed reduction, scanning electron microscopy and X-ray diffraction. The materials obtained were tested as catalysts for ethyl acetate oxidation, as a model volatile organic compound. La-Cu samples showed poor catalytic performance, but La-Co materials were much more active than the individual components. Catalytic activity seems to be mainly determined by the easiness of reduction of the catalysts, which is related to the availability of oxygen from the lattice. Catalysts containing Co or Cu in excess of La (on a molar base) were more active than the corresponding mixed oxides consisting of equal amounts of La and the transition metal. Samples prepared by the evaporation method were more active than those prepared by exotemplating, for the same molar ratio. Samples prepared by evaporation and glycine-nitrate methods calcined at 600C had a better performance than the corresponding oxides calcined at 300C. The most active sample found in this study was the La-Co mixed oxide prepared by the glycine nitrate method and calcined at 600C, 100% conversion of ethyl acetate to H2O and CO2 being achieved at 230C.

X. Chen; S.A.C. Carabineiro; P.B. Tavares; J.J.M. rfo; M.F.R. Pereira; J.L. Figueiredo

2014-01-01T23:59:59.000Z

494

Possible observables for chiral electric separation effect in Cu + Au collisions  

E-Print Network [OSTI]

The quark-gluon plasma (QGP) generated in relativistic heavy-ion collisions could be locally P- and CP-odd. In P- and CP-odd QGP, the electric field may induce a chiral current which is called chiral electric separation effect (CESE). We propose two possible observables for CESE in Cu + Au collisions: The first one is the correlation $\\zeta_{\\alpha\\beta}=\\langle \\cos[2(\\phi_\\alpha+\\phi_\\beta-2\\Psi_{\\rm RP})]\\rangle$; the second one is the charge-dependent event-plane angle $\\Psi^{q