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Note: This page contains sample records for the topic "layers uncoated acrylic" from the National Library of EnergyBeta (NLEBeta).
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they are not comprehensive nor are they the most current set.
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1

Chemically grafted polymeric filters for chemical sensors: Hyperbranched poly(acrylic acid) films incorporating {Beta}-cyclodextrin receptors and amine-functionalized filter layers  

SciTech Connect

The authors report a new molecular-filter approach for enhancing the selectivity of chemical sensors. Specifically, they describe electrochemical sensors prepared from Au electrodes coated with {beta}-cyclodextrin-functionalized, hyperbranched poly(acrylic acid)(PAA) films capped with a chemically grafted, ultrathin polyamine layer. The hyperbranched PAA film is a highly functionalized framework for covalently binding the {beta}-cyclodextrin molecular receptors. The thin, grafted polyamine overlayer acts as a pH-sensitive molecular filter that selectively passes suitably charged analytes. Poly(amidoamine) dendrimers or poly-D-lysine is used as 10--15-nm-thick filter layers. The results show that at low pH, when the polyamines are fully protonated, positively charged redox probe molecules, such as benzyl viologen (BV), do not permeate the filter layer. However, at high pH, when the filter layer is uncharged, BV penetrates the filter layer and is reduced at the electrode. The opposite pH dependence is observed for negatively charged redox molecules such as anthraquinone-2-sulfonate (AQS). Both BV and AQS specifically interact with the {beta}-cyclodextrin receptors underlying the polyamine filter layers.

Dermody, D.L.; Peez, R.F.; Bergbreiter, D.E.; Crooks, R.M. [Texas A and M Univ., College Station, TX (United States). Dept. of Chemistry] [Texas A and M Univ., College Station, TX (United States). Dept. of Chemistry

1999-02-02T23:59:59.000Z

2

Rectification of evanescent heat transfer between dielectric-coated and uncoated silicon carbide plates  

E-Print Network (OSTI)

Rectification of evanescent heat transfer between dielectric-coated and uncoated silicon carbide://jap.aip.org/authors #12;Rectification of evanescent heat transfer between dielectric-coated and uncoated silicon carbide-infinite bodies of the dielectric-coated silicon carbide and uncoated silicon carbide. The permittivity

Fan, Shanhui

3

Intelligent pig inspection, evaluation and remediation of uncoated seamless pipelines  

SciTech Connect

Many gas pipelines in operation in the US today were constructed prior to coating and cathodic protection (CP) current practices. A number of these vintage pipelines had no coating and had CP installed long after their construction thus allowing initial corrosion growths. With continual public and industrial growth and development on and around these pipelines, plus normal maintenance, there is a need to conduct periodic integrity assessments to insure public safety and maintain pipeline efficiency. One of the best tools currently available to measure or gauge pipeline integrity is the intelligent or smart pig. While there are various technologies offered by In-line inspection (ILI) vendors, magnetic flux leakage (MFL) is the one most commonly utilized for in-line inspections of natural gas pipelines. Over the years there has been much speculation over the ability of an MFL tool to clearly define corrosion magnitudes on uncoated pipelines because the MFL signals are distorted by the external corrosion crust or growth. In addition, many of the uncoated lines constructed utilized seamless pipe which compounds the problem with uneven wall thickness common with seamless pipe. Also, the irregular internal surfaces produce additional distortions or noise in the MFL signal. Analysis of the smart pig results are quite difficult when evaluating an uncoated seamless pipeline. However, with the latest advances in MFL smart pigs it is possible to accurately analyze corrosion on uncoated seamless steel pipelines. The ability to accurately identify corrosion on such structures provides the mechanism to evaluate the pipeline's integrity with analytical tools such as RSTRENG, (remaining strength). From that a successful remediation program can be developed which will save the pipeline operator millions of dollars when compared to the expensive alternative of replacing the pipeline.

Shamblin, T.R.

1999-07-01T23:59:59.000Z

4

Layer-by-layer assembly of electrically conductive polymer thin films  

E-Print Network (OSTI)

) to deposit layers of carbon black that are pre-stabilized with polyethylenimine (PEI) and poly(acrylic acid) (PAA) (see chemical structures in Fig. 3). The resulting films are thin, flexible, and relatively dense, with a high concentration of carbon black... within the deposition mixtures is described in Chapter III. Materials and Methods Materials Two types of polymers were used to stabilize carbon black for layer-by-layer (LbL) assembly of composite thin films. Poly(acrylic acid) (PAA...

Jan, Chien Sy Jason

2007-09-17T23:59:59.000Z

5

Life Prediction of Coated and Uncoated Metallic Interconnect for Solid Oxide Fuel Cell Applications  

SciTech Connect

Oxidation reaction of the ferritic stainless interconnects in a typical SOFC working environment is unavoidable and the thickness of the oxide scale will continue to grow with operating time, even with protective coatings. The interfacial strength of the various interfaces for the uncoated and coated ferritic interconnects is crucial to long term performance of SOFCs. In this paper, we employ an integrated experimental/modeling approach to quantify the interfacial strength and to further predict the life of Crofer 22 APU as SOFC interconnect under isothermal cooling condition. The life of Crofer 22 APU was predicted by comparing the predicted interfacial strength, interfacial stresses induced by the cooling process from the operating temperature to room temperature, together with the growth kinetics of oxide scale with and without spinel coating. It was found that the interfacial strength between the oxide scale and Crofer 22 APU substrate decreases with the growth of the oxide scale. The interfacial strength of the oxide scale and spinel coating is much higher than that of the oxide scale and Crofer 22 APU substrate. With the spinel coating, the predicted life of the Crofer 22 APU is significantly longer than that of the uncoated Crofer 22 APU.

Liu, Wenning N.; Sun, Xin; Stephens, Elizabeth V.; Khaleel, Mohammad A.

2009-04-15T23:59:59.000Z

6

PAA grafting onto new acrylate-alumoxane/PES mixed matrix nano-enhanced membrane: Preparation, characterization and performance in dye removal  

Science Journals Connector (OSTI)

Nanoboehmite particles were modified by acrylic acid to produce new alumoxane nanoparticles. Scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) were used to realize shape, size and functional groups of synthesized acrylate-alumoxane nanoparticles. The analyses declared that spherical acrylate-alumoxane nanoparticles were formed with hydroxyl and acrylate groups on their surface. Boehmite and acrylate-alumoxane were successfully introduced into polyethersulfone (PES) membrane matrix by the phase inversion method. Fabricated membranes were examined for water permeability, dye (acid blue 193) retention capability and fouling resistance against whey proteins. The field emission scanning electron microscopy (FE-SEM) images were used to estimate the changes in skin-layer morphology and bulk porosity of the prepared membranes. As a result, the directly arrayed finger-like macro-voids as well as bulk porosity were gained by adding acrylate-alumoxane nanoparticles compared to pristine PES membrane. However, different quantities of acrylate-alumoxane in the casting solution induced no noticeable alteration in the membranes bulk porosity. The membranes containing 1 wt.% of acrylate-alumoxane and 1 wt.% of nanoboehmite were selected to be grafted by polyacrylic acid (PAA). Comparison of grafting efficiency for pristine PES membrane and nanofiller blended membranes proved that acrylate-alumoxane offered more effective grafted membrane by providing polymerization initiation sites on mixed matrix membrane surface. In addition to high water permeability (around 19 kg/m2 h bar), the acrylate-alumoxane mixed/PAA grafted membrane showed superior dye removal and fouling resistance. Atomic force microscopy (AFM) as well as water contact angle test was applied for investigation of membranes surface properties.

Parisa Daraei; Sayed Siavash Madaeni; Negin Ghaemi; Mohammad Ali Khadivi; Laleh Rajabi; Ali Ashraf Derakhshan; Fatemeh Seyedpour

2013-01-01T23:59:59.000Z

7

Covalent Layer-by-Layer Synthesis of Responsive Porous Filters  

E-Print Network (OSTI)

of surfaces could be obtained by including a number of different functional groups.60 Such and coworkers used azide and alkyne functional groups to create a cross linked layer-by-layer assembly of poly(acrylic acid).65 Click chemistry was used... These particles were beneficial in that they became the first 17 experimental study of the phase morphology of mixed polymer brushed on a curved surface. They also introduced apt synthetic precursors of poly(acrylic acid)/PS functionalized particle surfaces...

Allen, Ainsley Larue

2012-07-16T23:59:59.000Z

8

Atomic Layer Deposition of Uniform Metal Coatings on Highly Porous Aerogel Substrates  

Science Journals Connector (OSTI)

Atomic Layer Deposition of Uniform Metal Coatings on Highly Porous Aerogel Substrates ... Figure 1 Bright-field transmission electron micrographs of the (a) uncoated and (b) W-coated alumina aerogel (6 ALD cycles), and the (c) uncoated and (b) W-coated germania aerogel (6 ALD cycles). ... For the alumina aerogel, the coating consists of crystalline W nanoparticles, ?2 nm in diameter, uniformly deposited on the surfaces of the nanoleaflets (Figure 1b). ...

Theodore F. Baumann; Juergen Biener; Yinmin M. Wang; Sergei O. Kucheyev; Erik J. Nelson; Joe H. Satcher, Jr.; Jeffrey W. Elam; Michael J. Pellin; Alex V. Hamza

2006-11-18T23:59:59.000Z

9

Durability of Acrylic: Stress and Response Characterization of Materials for Photovoltaics  

E-Print Network (OSTI)

Durability of Acrylic: Stress and Response Characterization of Materials for Photovoltaics Myles P of materials for enhanced photovoltaic (PV) performance, it is critical to have quantitative knowledge of acrylic PMMA are reported. Keywords-Acrylic, Degradation, Photovoltaics, Photodegradation I. INTRODUCTION

Rollins, Andrew M.

10

Methods for the synthesis of deuterated acrylate salts  

DOE Patents (OSTI)

A method for synthesizing a deuterated acrylate of the Formula (1), the method comprising: (i) deuterating a propiolate compound of Formula (2) to a methyne-deuterated propiolate compound of Formula (3) in the presence of a base and D.sub.2O: and (ii) reductively deuterating the methyne-deuterated propiolate compound of Formula (3) in a reaction solvent in the presence of deuterium gas and a palladium-containing catalyst to afford the deuterated acrylate of the Formula (1). The resulting deuterated acrylate compounds, derivatives thereof, and polymers derived therefrom are also described.

Yang, Jun; Bonnesen, Peter V.; Hong, Kunlun

2014-09-09T23:59:59.000Z

11

Photovoltaic Lifetime & Degradation Science Statistical Pathway Development: Acrylic Degradation  

E-Print Network (OSTI)

Photovoltaic Lifetime & Degradation Science Statistical Pathway Development: Acrylic Degradation, USA ABSTRACT In order to optimize and extend the life of photovoltaics (PV) modules, scientific photovoltaics. The statisti- cally significant relationships were investigated using lifetime and degradation

Rollins, Andrew M.

12

Characterization of polystyrene-block-poly (acrylic acid) micelles  

E-Print Network (OSTI)

Several parameters that affect the formation, size and spatial distribution of micelles of poly(styrene-block-acrylic acid) (PS-b-PAA) in organic solvents or assembled on solid substrates have been investigated. The micelles ...

Kohen, Naomi (Naomi T.)

2005-01-01T23:59:59.000Z

13

Permeation of acrylate compounds through four commercially available gloves  

E-Print Network (OSTI)

PERMEATION OF ACRYLATE COMPOUNDS THROUGH FOUR COMMERCIALLY AVAILABLE GLOVES A Thesis DAVID SAMUEL HORN Submitted to the Graduate College of Texas ARM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE... May l986 Major Subject: Industrial Hygiene PERMEATION OF ACRYLATE COMPOUNDS THROUGH FOUR COMMERCIALLY AVAILABLE GLOVES A Thesis DAVID SAMUEL HORN Approved as to style and content by: ichar B. Ko en (Chairman of Conunittee) Harry uggs (Member...

Horn, David Samuel

2012-06-07T23:59:59.000Z

14

Jay Rummel, Five Valley Trilogy, acrylic, 3-panel, 1977-1982  

E-Print Network (OSTI)

Jay Rummel, Five Valley Trilogy, acrylic, 3-panel, 1977-1982 Tu Baixong, untitled landscape Stephanie J. Frostad Survivor, fiberglass, oil, acrylic, 2000 Lane Timothy, The View from Way out West, oil

Vonessen, Nikolaus

15

E-Print Network 3.0 - acrylic acid grafted Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

& acronyms 11 PPPP PAA Poly(acrylic acid) PBMA Poly(butyl methacrylate) PE Polyethylene PHEMA Poly... ......

16

Electrophoretic Mobility of Poly(acrylic acid)-Coated Alumina Particles  

SciTech Connect

The effect of poly (acrylic acid) (PAA) adsorption on the electrokinetic behavior of alumina dispersions under high pH conditions was investigated as a function of polymer concentration and molecular weight as well as the presence, concentration and ion type of background electrolyte. Systems of this type are relevant to nuclear waste treatment, in which PAA is known to be an effective rheology modifier. The presence of all but the lowest molecular weight PAA studied (1800) led to decreases in dynamic electrophoretic mobility at low polymer concentrations, attributable to bridging flocculation, as verified by measurements of particle size distribution. Bridging effects increased with polymer molecular weight, and decreased with polymer concentration. Increases in background electrolyte concentration enhanced dynamic electrophoretic mobility as the polymer layers were compressed and bridging was reduced. Such enhancements were reduced as the cation was changed from Na+ to K+ to Cs+.

Bhosale, Prasad S.; Chun, Jaehun; Berg, John C.

2011-06-01T23:59:59.000Z

17

Development of palm oil-based UV-curable epoxy acrylate and urethane acrylate resins for wood coating application  

SciTech Connect

The trend of using renewable sources such as palm oil as raw material in radiation curing is growing due to the demand from the market to produce a more environmental friendly product. In this study, the radiation curable process was done using epoxy acrylate and urethane acrylate resins which are known as epoxidised palm olein acrylate (EPOLA) and palm oil based urethane acrylate (POBUA), respectively. The purpose of the study was to investigate curing properties and the application of this UV-curable palm oil resins for wood coating. Furthermore, the properties of palm oil based coatings are compared with the petrochemical-based compound such as ebecryl (EB) i.e. EB264 and EB830. From the experiment done, the resins from petrochemical-based compounds resulted higher degree of crosslinking (up to 80%) than the palm oil based compounds (up to 70%), where the different is around 10-15%. The hardness property from this two type coatings can reached until 50% at the lower percentage of the oligomer. However, the coatings from petrochemical-based have a high scratch resistance as it can withstand at least up to 3.0 Newtons (N) compared to the palm oil-based compounds which are difficult to withstand the load up to 1.0 N. Finally, the test on the rubber wood substrate showed that the coatings containing benzophenone photoinitiator give higher adhesion property and their also showed a higher glosiness property on the glass substrate compared to the coatings containing irgacure-819 photoinitiator. This study showed that the palm oil coatings can be a suitable for the replacement of petrochemicals compound for wood coating. The palm oil coatings can be more competitive in the market if the problems of using high percentage palm oil oligomer can be overcome as the palm oil price is cheap enough.

Tajau, Rida; Mahmood, Mohd Hilmi; Salleh, Mek Zah; Salleh, Nik Ghazali Nik [Radiation Processing Technology Division, Malaysian Nuclear Agency (Nuclear Malaysia), Bangi, 43000 Kajang, Selangor (Malaysia); Ibrahim, Mohammad Izzat [Faculty of Science, University of Malaya (UM), 50603 Kuala Lumpur (Malaysia); Yunus, Nurulhuda Mohd [Faculty of Science and Technology, National University Malaysia (UKM), 43600 Bangi, Selangor (Malaysia)

2014-02-12T23:59:59.000Z

18

E-Print Network 3.0 - acrylic composites loaded Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

detection Summary: - boron carbide (B4C), polymethyl methacrylate (PMMA or acrylic), expanded poly- tetrafluoroethylene (PTFE... ) with an evaporated coating of the...

19

E-Print Network 3.0 - acrylic intraocular lenses Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

Electronic Engineering, Hong Kong University Collection: Engineering 60 Fiber Optics and Expanded Beam Termini Summary: Acrylate buffer' applied and baked on to protect fiber...

20

E-Print Network 3.0 - acrylic polymers Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

a methacrylate functionality for incorporation into the acrylate network polymer... RECENT ADVANCES IN CONTACT MOLDING FOR THE NANOSCOPIC PATTERNING OF CONDUCTING ... Source:...

Note: This page contains sample records for the topic "layers uncoated acrylic" 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

E-Print Network 3.0 - amphiphilic acryl sucrose Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

(ATRP). After subsequent selective hydrolysis of PtBA yielding poly(acrylic acid) (PAA Source: Zhao, Yue - Dpartement de chimie, Universit de Sherbrooke Collection:...

22

E-Print Network 3.0 - acrylic resin denture Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

denture Search Powered by Explorit Topic List Advanced Search Sample search results for: acrylic resin denture Page: << < 1 2 3 4 5 > >> 1 OTHER ACCIDENT?24. ANY PERSON WHO...

23

Graphene oxide/poly(acrylic acid) hydrogel by ?-ray pre-irradiation on graphene oxide surface  

Science Journals Connector (OSTI)

Graphene oxide/poly(acrylic acid) (GO/PAA)...?...-ray pre-irradiation technique. The functional groups in graphene oxide were modified to peroxide in an...2 environment with ?...-ray radiation. Radical species fr...

Sungyoung Lee; Hoik Lee; Jae Hyun Sim; Daewon Sohn

2014-02-01T23:59:59.000Z

24

Polymers with hydro-responsive topography identified using high throughput AFM of an acrylate microarray  

E-Print Network (OSTI)

Atomic force microscopy has been applied to an acrylate polymer microarray to achieve a full topographic characterisation. This process discovered a small number of hydro-responsive materials created from monomers with ...

Hook, Andrew L.

25

A Study on Plasma Polymerization of Acrylic Acid Using APF Plasma Focus Device  

Science Journals Connector (OSTI)

The most conventional way for polymerization of acrylic acid on different substrates is using RF devices and introducing of other devices is under way. In this work we have a new study on formation of polymer Acr...

M. H. S. Alavi; M. Habibi; R. Amrollahi; F. Afshar Taromi

2011-04-01T23:59:59.000Z

26

E-Print Network 3.0 - anterior edge acrylic Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

short-ward of 375 nm. To account for the refractive index of acrylic, we decreased the inclination... imperfections of the master. 3 Replication Lens Master Base plate Cover...

27

Small-angle neutron scattering study of poly(methyl methacrylate-block-sodium acrylate-block-methyl methacrylate) and poly(sodium acrylate-block-methyl methacrylate-block-sodium acrylate) triblock copolymers in aqueous solutions  

Science Journals Connector (OSTI)

?Small-angle neutron scattering experiments were made on poly(methyl methacrylate-block-sodium acrylate-block-methyl methacrylate) [p(MMA-b-NaA-b-MMA)] and p(NaA-b-MMA-b...-NaA) solutions by varying the compositi...

Szabolcs Vass; Kristina Haimer; Gerhard Meier…

2002-03-01T23:59:59.000Z

28

Performance criteria for center layer of triple glazing  

NLE Websites -- All DOE Office Websites (Extended Search)

Performance criteria for center layer of triple glazing Performance criteria for center layer of triple glazing Traditional highly insulating windows are made of three pieces of glass. Alternatively, the center layer can be a thin layer of coated plastic. (See Figure 1). In both cases, the center layer is sealed between two spacers, creating two completely separate spaces, and extending through the edge of the insulating glass unit. Recent research has shown that a simple "convection" barrier, as shown in Figure 2, which does not extend through the edge of the insulating glass unit, is as effective an insulator as traditional designs. Advantages include a simpler and more reliable edge design and potentially reduced manufacturing costs. We have investigated various plastics and edge constraint designs and are now focused on the use of an acrylic layer, between 1mm and 3mm thick. Bent edges will help keep the layer in place (see Figure 3a,b,c). In order to commercialize such a product, several issues remain to be addressed. These issues, as they relate to acrylic, are defined below. Other plastics and designs can still be explored.

29

Layering Technologies  

Science Journals Connector (OSTI)

Planar technology requires that thin layers of materials be formed and patterned sequentially, commencing with a flat rigid substrate. The key aspects of each layer are its Thi...

Ivor Brodie; Julius J. Muray

1992-01-01T23:59:59.000Z

30

Study of the simultaneous effects of MMT nanoclay and hydrophobically modified ethoxylated urethane (HEUR) on viscoelastic and steady shear properties of water-based acrylic resins  

Science Journals Connector (OSTI)

The storage stability of montmorillonite/acrylic resin was studied via rheological characterizations. The Na+–MMT nanoclay and a water-based acrylic resin were ... . The results showed that adding the montmorillo...

Mohsen Sarrafi; Babak Kaffashi…

2013-09-01T23:59:59.000Z

31

Comparing the Degree of Exothermic Polymerization in Commonly Used Acrylic and Provisional Composite Resins for  

E-Print Network (OSTI)

Composite Resins for Intraoral Appliances CA Rice, DVM; Jessica Riehl, DVM;Karl Broman, PhD;Jason W. Soukup, DVM; William R. Gengler, DVM Summary: The use ofdental acrylics and composite resins in veteri- naryylics and composite resins produce an exothermic reaction during the polymerization ptvcess. The aim q

Broman, Karl W.

32

Research paper Investigation of the cytotoxicity and insulin transport of acrylic-based  

E-Print Network (OSTI)

(ethylene glycol) as well as crosslinked poly(acrylic acid) grafted with poly(ethylene glycol) were prepared Microparticles or nanospheres of hydrogels of crosslinked poly(methacrylic acid) grafted with poly for use as oral insulin delivery carriers. The copolymer carriers were synthesized by precipitation/dispersion

Peppas, Nicholas A.

33

Synthesis and Complexation Behavior of Pluronic-b-Poly(acrylic Acid) Copolymer with Doxorubicin  

E-Print Network (OSTI)

Poly(acrylic acid) (PAA) was attached on both termini of Pluronic P85 copolymer (EO27PO39EO27)) via atom transfer radical polymerization (ATRP) to produce a novel block copolymer, PAA-b-P85-b-PAA (P85PAA). The P85PAA-DOX ...

Tian, Y.

34

Synthesis and Aggregation Behavior of Pluronic F87/Poly(acrylic acid) Block Copolymer with Doxorubicin  

E-Print Network (OSTI)

Poly(acrylic acid) (PAA) was grafted onto both termini of Pluronic F87 (PEO??-PPO??-PEO??) via atom transfer radical polymerization to produce a novel muco-adhesive block copolymer PAA??-b-F??-b-PAA??. It was observed that ...

Tian, Y.

35

Boundary Layer  

NLE Websites -- All DOE Office Websites (Extended Search)

Sea Spray on the Thermodynamics of the Hurricane Boundary Layer For original submission and image(s), see ARM Research Highlights http:www.arm.govsciencehighlights Research...

36

Effect of the finishing oil of acrylic fibers in the optical rotation of the Raman scattered light  

Science Journals Connector (OSTI)

Polarized Raman spectra have been obtained from polyacrylonitrile copolymers fibers with vinyl acetate Poly(AN-co-VA), and methyl acrylate Poly(AN-co-MA) with finishing and without...

Rosales-Candelas, I; Soto-Bernal, J J; Gonzalez-Mota, R; Frausto-Reyes, C

2013-01-01T23:59:59.000Z

37

HiR Thermal Testing Results  

NLE Websites -- All DOE Office Websites (Extended Search)

4 4 position specimen # specimen description (test conditions: cold side -18°C, warm side 21°C) date + time 100 mm from head TC center of glass TC 100 mm from sill TC upper IR line average lower IR line average complete IR line average left 6 triple, 2 sputtered low-e glass layers, uncoated acrylic center layer in grooved spacer, Kr 3/11/05 11:40 18.10 17.80 18.13 17.44 17.82 right 7 triple, 2 sputtered low-e glass layers, uncoated acrylic center layer top angled toward cold side, Kr 17.80 13.74 16.90 14.44 15.77 - Back to Summary - - Back to Summary - - Back to Summary - delta T line average delta T 100mm from head delta T center of glass delta T 100mm from sill ambient high ambient low ambient average six surface average

38

Radiation gas evolution in loosely crosslinked copolymers of acrylic acid and hexaallylsucrose  

SciTech Connect

The change in the thickening power and quantitative composition of ..gamma..-radiolysis products of poly(acrylic acid) (PAA) in loosely crosslinked copolymers of acrylic acid and hexaallylsucrose (CAAAS) was studied as a function of the content of the crosslinking agent, hexaallylsucrose (HAS), in the starting monomeric mixture, and irradiation conditions (vacuum, atmospheric environment). With increase in the per-weight content of HAS from 1.2 to 2.5%, the thickening power of nonirradiated CAAAS increases. By the action of ..gamma..-radiation the thickening power of PAA and CAAAS decreases, and carbon oxides, methane and ethane are detected in their radiolysis products. With increases in the HAS content, the yields of carbon oxides and ethane increase. This was interpreted as the result of a radiation chemical destruction of lattice junction points of CAAAS.

Afanas'ev, A.M.; Demishev, V.N.; Novozhilov, V.A.

1987-05-01T23:59:59.000Z

39

Modification of silicon nitride slip properties by poly(acrylic acid)  

SciTech Connect

Acrylic-acid based polyelectrolytes are used for dispersion and rheology control of ceramic powder slips. This study focuses on the Si{sub 3}N4/H{sub 2}O/poly(acrylic acid) (PAA) system, with the goal of improving our basic understanding of the mechanisms which may significantly affect slip properties during processing. A variety of experimental techniques were employed, including potentiometric titration, electroacoustic analysis, adsorption isotherms, and controlled-stress rheology. The slips exhibited complex behavior over a wide range of conditions in which solids concentration, PAA molecular weight and concentration, and pH were varied. Polymer charge and conformation were found to have significant impact on the flow properties. Pseudoplastic behavior was attributed to the presence of free polymer. The flow properties were also found to be highly pH dependent.

Hackley, V.A.; Maglhan, S.G. [National Institute of Standards and Technology, Gaithersburg, MD (United States)

1996-06-01T23:59:59.000Z

40

Characterization of the oxide formed in the presence of poly acrylic acid over the steam generator structural materials of nuclear power plants  

Science Journals Connector (OSTI)

On-line addition of polymeric dispersants, such as poly acrylic acid (PAA), to the steam generator (SG) results in the formation of a better protective inner oxide layer that reduces subsequent corrosion of structural materials. Its dispersive action inhibits the growth of a secondary oxide layer thereby facilitating their easy removal. This paper discusses the effect of PAA on the nature of oxides formed over the surfaces of SG. In the case of carbon steel, the inner oxide layer (magnetite) formed in the presence of PAA was protective. Electrochemical studies showed a minimum concentration of 350 ppb of PAA was found to be optimum. On the monel surface, in the absence of PAA, nickel ferrite was formed while in the presence of PAA, the oxide formed was a mixture of oxides of copper and nickel. A concentration of 700 ppb of PAA was found to be optimum for monel. In the case of incoloy, the effect of PAA was not discernible except for the size and morphology of the crystallites formed.

Akhilesh C. Joshi; Appadurai L. Rufus; Sumathi Suresh; Palogi Chandramohan; Srinivasan Rangarajan; Sankaralingam Velmurugan

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "layers uncoated acrylic" 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

Solute Diffusion in Poly(vinyl alcohol)/Poly(acrylic acid) Interpenetrating Networks  

E-Print Network (OSTI)

) and poly(acrylic acid) (PAA) by varying the content of PAA in the hydrogel membrane. We also compared the permeation of solutes through interpen- etrating polymer networks (IPNs) at pH 3 (below the pKa of PAA) and pH 6 (above the pKa of PAA) and determined that permeation is a function of size exclu- sion parameters

Peppas, Nicholas A.

42

Acrylic acid polymerization and its graft copolymerization to poly(ethylene oxide) by gamma rays  

SciTech Connect

Free radical initiated polymerization of acrylic acid was investigated in methanol-water solutions with and without poly(ethylene oxide) (PEO). The formation of poly(acrylic acid) (PAA) initiated both by gamma irradiation and water soluble azo initiators was found to follow classical free radical kinetics. A significant increase in the rate of the propagation step (together with the degree of polymerization) was observed as the water fraction of the medium increased. During homogeneous polymerization of acrylic acid in methanol-water solutions containing poly(ethylene oxide), PAA grafting efficiency was found to be 67% and independent of initiation rate and yield. A mechanism of grafting to poly(ethylene oxide) was proposed. Chain transfer to PEO (K/sub tr/ = 6.5 x 10/sup -5/) was found to be the dominant mechanism for graft formation. Drag reduction characteristics of these PEO-PAA graft copolymers were measured in dilute aqueous solutions as a function of Reynolds number and solution pH. PEO graft copolymers containing 45% by mole PAA graft had, in neutral and basic solutions, drag reduction characteristics equivalent on a mass basis to the initial PEO. However at low pH, drag reduction characteristics disappeared as the PEO-PAA coacervate formed.

Hochberg, A.

1984-01-01T23:59:59.000Z

43

New fluorinated acrylic polymers for improving weatherability of building stone materials  

Science Journals Connector (OSTI)

Acrylic polymers are widely used for their suitability to be shaped in different molecular structures. However, while very appropriate for many applications, these materials are characterized by a limited outdoor stability. In order to improve this last characteristic while maintaining the simple and flexible synthetic route, a study was performed based on the preparation of fluorinated polymers from acrylic monomers where several H-atoms in different positions were replaced with F-atoms. The structure design was aimed to optimize (e.g. minimize) the fluorine content of the final material while obtaining improved chemical and photochemical stability, good filmability and limited permeability to condensed water. The preparation of polymers of methacrylates derived from partially fluorinated alcohol by free radical mechanism is described. The fluorine content and distribution in the macromolecules is modulated by selecting different monomers and by copolymerization with nonfluorinated acrylates or vinylethers. The selection of the comonomers and their relative content in the polymer allows to control the glass transition temperature and the filmability as well as the protection efficiency of the coating. Polymers derived from more complex monomers such as ?-trifluoromethyl-methylacrylate are also described. The suitability of these new materials for protective coating of stones is tested by evaluating their stability to different chemical and physical agents and their selective permeability to water vapour vs. condensed water.

F Ciardelli; M Aglietto; L Montagnini di Mirabello; E Passaglia; S Giancristoforo; V Castelvetro; G Ruggeri

1997-01-01T23:59:59.000Z

44

Application of Fourier Transform Infrared (FT-IR) Spectroscopy to the Study of the Modification of Epoxidized Sunflower Oil by Acrylation  

Science Journals Connector (OSTI)

Commercial sunflower oil was epoxidized at the laboratory-scale. The epoxidized sunflower oil (ESFO) was modified following the acrylation reaction. ...

Irinislimane, Ratiba; Belhaneche-Bensemra, Naima

2012-01-01T23:59:59.000Z

45

Test of Orientation/Stretch-Induced Reduction of Friction via Primitive Chain Network Simulations for Polystyrene, Polyisoprene, and Poly(n-butyl acrylate)  

Science Journals Connector (OSTI)

Test of Orientation/Stretch-Induced Reduction of Friction via Primitive Chain Network Simulations for Polystyrene, Polyisoprene, and Poly(n-butyl acrylate) ...

Yuichi Masubuchi; Yumi Matsumiya; Hiroshi Watanabe

2014-09-24T23:59:59.000Z

46

Exposure assessment of acrylates/methacrylates in radiation-cured applications  

SciTech Connect

Occupational exposures to radiation-cured acrylates/methacrylates during their processing and use in coatings, inks, and adhesives were evaluated in 12 walk-through surveys at formulator and applicator sites. Inhalation and dermal-exposure routes were studied. According to the authors, the basic process used to formulate coatings, inks, and adhesives consists of blending raw materials in closed mixing vessels using local exhaust ventilation in the form of elephant trunks at vessel charging and packaging locations. Application methods surveyed included reverse-roll coaters, direct roll coaters, curtain/rain coaters, laminators, pneumatic injection, spray guns, and manual application. At the sites surveyed, the number of workers potentially exposed at each site ranged from two to 142. Process operators at applicator sites had the greatest potential for dermal exposure. Generally, the potential for inhalation exposure was low due to low volatility of the multifunctional acrylates/methacrylates used in the formulations. No reliable air-monitoring data were available at any site. Respirator use was limited and sporadic.

Not Available

1987-09-25T23:59:59.000Z

47

Improved oxidation resistance of organic/inorganic composite atomic layer deposition coated cellulose nanocrystal aerogels  

Science Journals Connector (OSTI)

Cellulose nanocrystal (CNC) aerogels are coated with thin conformal layers of Al2O3 using atomic layer deposition to form hybrid organic/inorganic nanocomposites. Electron probe microanalysis and scanning electron microscopy analysis indicated the Al2O3 penetrated more than 1500??m into the aerogel for extended precursor pulse and exposure/purge times. The measured profile of coated fiber radius versus depth from the aerogel surface agrees well with simulations of precursor penetration depth in modeled aerogel structures. Thermogravimetric analysis shows that Al2O3 coated CNC aerogel nanocomposites do not show significant thermal degradation below 295?°C as compared with 175?°C for uncoated CNC aerogels an improvement of over 100?°C.

2014-01-01T23:59:59.000Z

48

New oil modified acrylic polymer for pH sensitive drug release: Experimental results and statistical analysis  

E-Print Network (OSTI)

We report results of an experimental study, complemented by detailed statistical analysis of the experimental data, on the development of a more effective control method of drug delivery using a pH sensitive acrylic polymer. New copolymers based on acrylic acid and fatty acid are constructed from dodecyl castor oil and a tercopolymer based on methyl methacrylate, acrylic acid and acryl amide were prepared using this new approach. Water swelling characteristics of fatty acid, acrylic acid copolymer and tercopolymer respectively in acid and alkali solutions have been studied by a step-change method. The antibiotic drug cephalosporin and paracetamol have also been incorporated into the polymer blend through dissolution with the release of the antibiotic drug being evaluated in bacterial stain media and buffer solution. Our results show that the rate of release of paracetamol getss affected by the pH factor and also by the nature of polymer blend. Our experimental data have later been statistically analyzed to quantify the precise nature of polymer decay rates on the pH density of the relevant polymer solvents. The time evolution of the polymer decay rates indicate a marked transition from a linear to a strictly non-linear regime depending on the whether the chosen sample is a general copolymer (linear) or a tercopolymer (non-linear). Non-linear data extrapolation techniques have been used to make probabilistic predictions about the variation in weight percentages of retained polymers at all future times, thereby quantifying the degree of efficacy of the new method of drug delivery.

N. Panja; A. K. Chattopadhyay

2014-12-05T23:59:59.000Z

49

Atmospheric plasma treatment to improve durability of a water and oil repellent finishing for acrylic fabrics  

Science Journals Connector (OSTI)

In this study, the influence of an atmospheric plasma treatment on the durability of a commercial water and oil repellent finish was tested. Acrylic fabrics were processed with a RF atmospheric pressure plasma generator and afterwards a fluorocarbon finish was applied through a traditional pad-dry-cure method. Two gas mixtures were tested (helium and helium/oxygen) with different plasma treatment times. The ageing of the finishing was simulated through repeated accelerated laundry cycles. The water and oil repellencies were measured through standard test methods. While the initial water and oil repellency did not change, the plasma treatment improved the durability of the finish after artificial ageing. Scanning electron microscopy analyses were carried out to highlight morphological changes.

Alberto Ceria; Peter J. Hauser

2010-01-01T23:59:59.000Z

50

Carbon nanotubes and carbon onions for modification of styrene-acrylate copolymer based nanocomposites  

SciTech Connect

Styrene acrylate polymer (SAC) nanocomposites with various carbon nanofillers (multiwalled carbon nanotubes MWCNTs and onion like carbon OLC) are manufactured by means of latex based routes. Concentration of the carbon nanofillers is changed in a broad interval starting from 0.01 up to 10 wt. %. Elastic, dielectric and electromagnetic properties of SAC nanocomposites are investigated. Elastic modulus, electrical conductivity and electromagnetic radiation absorption of the investigated SAC nanocomposites increase along with rising nanofiller content. The effect of the addition of anisometric MWCNTs on the elastic properties of the composite is higher than in the case of the addition of OLC. Higher electrical conductivity of the OLC containing nanocomposites is explained with the fact that reasonable agglomeration of the nanofiller can promote the development of electrically conductive network. Efficiency of the absorption of electromagnetic radiation depends on the development of conductive network within the SAC matrix.

Merijs-Meri, Remo; Zicans, Janis; Ivanova, Tatjana; Bitenieks, Juris [Institute of Polymer Materials, Riga Technical University, Azenes street 14/24, LV-1048, Riga (Latvia); Kuzhir, Polina; Maksimenko, Sergey [Institute of Nuclear Problems, Belarus State University, Bobruiskaya str. 11, 220030, Minsk (Belarus); Kuznetsov, Vladimir; Moseenkov, Sergey [Boreskov Institute of Catalyst Siberian branch of RAS, pr. Lavrentieva 5, 630090, Novosibirsk (Russian Federation)

2014-05-15T23:59:59.000Z

51

A Micellar Route to Layer-by-Layer Assembly of Hydrophobic Functional Polymers  

E-Print Network (OSTI)

by a modification reaction. They are poly(acrylic acid)-b-poly{6-[4-(4-cyanophenyl)phenoxy]hexyl methacrylate} (PAA- b-PAMA) or a polyanion (PAA-b-PCMA) corona, the two hydrophobic SCLCPs can be LBL assembled of poly(acrylic acid) (PAA, at pH > 7) and the micelle with a core of poly(tert- butyl acrylate) (Pt

Zhao, Yue

52

Effect of monomer/nanoclay interaction on the kinetics of atom transfer radical homo- and copolymerization of styrene and methyl acrylate  

Science Journals Connector (OSTI)

Atom transfer radical homo- and copolymerization of styrene and methyl acrylate initiated with CCl3...-terminated poly(vinyl acetate) macroinitiator were performed at 90°C in the presence of nanoclay (Cloisite 30...

Mahdi Abdollahi; Mohammad Ali Semsarzadeh

2012-04-01T23:59:59.000Z

53

Influence of poly(acrylic acid) molar mass on the fracture properties of glass polyalkenoate cements based on waste gasifier slags  

Science Journals Connector (OSTI)

The failure behaviour of glass polyalkenoate cements was investigated using a linear elastic fracture mechanics (LEFM) approach. Cements were based on Drayton gasifier slag and four poly(acrylic acid)s...3 to 6.4...

A. Sullivan; R. Hill

54

Beneficial Effect of Nanoclay in Atom Transfer Radical Polymerization of Ethyl Acrylate:? A One Pot Preparation of Tailor-Made Polymer Nanocomposite  

Science Journals Connector (OSTI)

Beneficial Effect of Nanoclay in Atom Transfer Radical Polymerization of Ethyl Acrylate:? A One Pot Preparation of Tailor-Made Polymer Nanocomposite ... Nanoclays [Cloisite 30B, Cloisite NA+, and Cloisite 20A] were supplied by Southern Clay products, Gonzales, TX. ...

Haimanti Datta; Nikhil K. Singha; Anil K. Bhowmick

2007-12-12T23:59:59.000Z

55

Building biomedical materials layer-by-layer  

E-Print Network (OSTI)

In this materials perspective, the promise of water based layer-by-layer (LbL) assembly as a means of generating drug-releasing surfaces for biomedical applications, from small molecule therapeutics to biologic drugs and ...

Hammond, Paula T.

56

Patterning micron-sized features in a cross-linked poly(acrylic acid) film by a wet etching process{  

E-Print Network (OSTI)

method to create sub-micron-scale patterns of cation- cross-linked poly(acrylic acid) (CCL-PAA). PAA can) on a film of CCL-PAA, the exposed regions of CCL-PAA were etched by either an aqueous NaOH or EDTA solution photolithographically. We used these patterned films of CCL-PAA i) to host and template the reduction of metallic

Prentiss, Mara

57

Supplementary lighting of early tomatoes after planting out in glass and acrylic greenhouses  

Science Journals Connector (OSTI)

The cultivars ‘Abunda’ and ‘Virosa’ of Lycopersicon esculentum Mill. were subjected to supplementary light with fluorescent tubes (44 W m?2 installed) from planting in the middle of February to late May in greenhouses of different covering materials. In general artificial light enhanced fruit numbers and grading and contributed to greater total yield. Supplementary light with lamps placed 2.7 m above the rockwool slabs increased the number of fruits and total yield by 7 and 14%, respectively, compared with no supplementary light, while the fruit size decreased. Top light adjusted to the increase in plant height (the distance between the top of the plant and lamps, approximately 35–40 cm) increased the number of fruits and yield by 11%, but had no effect on fruit size. Illumination of the plants with the light sources permanently mounted 1.30 m above the rockwool slabs increased the number of fruits, yield and fruit size by 21, 26 and 15%, respectively. The effect of supplementary light was more pronounced in greenhouses covered with double acrylic than with single glass.

S.O. Grimstad

1987-01-01T23:59:59.000Z

58

Investigation of electrochemical properties of a poly(vinyl alcohol)/poly(acrylic acid) polymer blend  

SciTech Connect

Chemical sensors have wide applications in medicine, environmental monitoring, industrial applications, and others because of their versatility, ruggedness, sensitivity, selectivity, and economy. Electrochemical sensors are constructed by using a conducting medium, in this case graphite, and applying a constant potential while measuring changes in the current. Polymers are used for electrochemical sensors to exclude interferents from the electrode surface, to preconcentrate the analyte near the electrode, and in some cases to provide a matrix for the immobilization of analytes, such as enzymes. These functions of the polymer can serve to improve the detection limit of the sensor. This project involves the evaluation of a new polymer for electrode modification. The poly(vinyl alcohol)/poly(acrylic acid) (PVA/PAA) polymer was originally developed as an ion exchanger for use in space batteries. It has also been used in wastewater cleanup because it will concentrate heavy metals in the presence of calcium ion. This polymer is also optically clear, so it can potentially be used for an optical sensor. We are interested in investigating the ion exchange properties of the PVA/PAA polymer, as well as the ability of this polymer to preconcentrate and exclude analytes on the basis of size, charge, and hydrophilic/hydrophobic interactions.

DeSantis, C.O.; Seliskar, C.; Heineman, W.R. [Univ. of Cincinnati, OH (United States)

1995-12-31T23:59:59.000Z

59

Polyaniline/poly acid acrylic thin film composites: a new gamma radiation detector  

SciTech Connect

In this paper, we present a new and straightforward route to prepare polyaniline/poly acid acrylic (PAA) thin film composites in large areas and on almost any surface. This method was developed to improve the mechanical and adherence properties of polyaniline devices used as ionization radiation sensors. The route consists of the combination of the metal oxidant with polymer acid to form a highly homogeneous and viscous paste, which can be easily spread over any surface. In the second step, an aniline acid solution is brought in contact with the dried paste where polymerization occurs, yielding a high homogeneous and conducting polymer composite. The UV-visible absorption and infrared analysis confirm that a polyaniline/PAA complex is obtained. The four-point conductivity measurements show that the composite conductivity {rho} is the order of 5 {omega}{sup -1} cm{sup -1}. Preliminary gamma radiation interaction with the composite shows that the doped composite exhibits a linear response that can be used in the development of real-time radiation sensors for the dose range from 0 to 5000 Gy.

Lima Pacheco, Ana P.; Araujo, Elmo S.; Azevedo, Walter M. de

2003-03-15T23:59:59.000Z

60

Earth's Core Hottest Layer  

NLE Websites -- All DOE Office Websites (Extended Search)

Earth's Core Hottest Layer Earth's Core Hottest Layer Name: Alfred Status: Grade: 6-8 Location: FL Country: USA Date: Spring 2011 Question: Why is the inner core the hottest layer? How is that possible? Replies: There are two factors causing the center of the Earth hotter than various layers of the Earth's. First, the more dense is the layer. The denser layer, the hotter it will be. In addition, the source of the heating is due to heat produced by nuclear decay. These substances tend to be more dense than lower dense substances. So the source of heat (temperature) is higher, the greater will be the temperature. Having said all that, the reasons are rather more complicated in the "real" Earth. If the inner layers were less dense they would rise (bubble) to the "surface" leaving the inner layers more dense and thus hotter layers.

Note: This page contains sample records for the topic "layers uncoated acrylic" 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

In-Situ Transmission Electron Microscopy Probing of Native Oxide and Artificial Layers on Silicon Nanoparticles for Lithium Ion Batteries  

SciTech Connect

Surface modification of silicon nanoparticle via molecular layer deposition (MLD) has been recently proved to be an effective way for dramatically enhancing the cyclic performance in lithium ion batteries. However, the fundamental mechanism as how this thin layer of coating function is not known, which is even complicated by the inevitable presence of native oxide of several nanometers on the silicon nanoparticle. Using in-situ TEM, we probed in detail the structural and chemical evolution of both uncoated and coated silicon particles upon cyclic lithiation/delithation. We discovered that upon initial lithiation, the native oxide layer converts to crystalline Li2O islands, which essentially increases the impedance on the particle, resulting in ineffective lithiation/delithiation, and therefore low coulombic efficiency. In contrast, the alucone MLD coated particles show extremely fast, thorough and highly reversible lithiation behaviors, which are clarified to be associated with the mechanical flexibility and fast Li+/e- conductivity of the alucone coating. Surprisingly, the alucone MLD coating process chemically changes the silicon surface, essentially removing the native oxide layer and therefore mitigates side reaction and detrimental effects of the native oxide. This study provides a vivid picture of how the MLD coating works to enhance the coulombic efficiency and preserve capacity and clarifies the role of the native oxide on silicon nanoparticles during cyclic lithiation and delithiation. More broadly, this work also demonstrated that the effect of the subtle chemical modification of the surface during the coating process may be of equal importance as the coating layer itself.

He, Yang; Piper, Daniela M.; Gu, Meng; Travis, Jonathan J.; George, Steven M.; Lee, Se-Hee; Genc, Arda; Pullan, Lee; Liu, Jun; Mao, Scott X.; Zhang, Jiguang; Ban, Chunmei; Wang, Chong M.

2014-10-27T23:59:59.000Z

62

Improving angular acceptance of stationary low-concentration photovoltaic compound parabolic concentrators using acrylic lens-walled structure  

Science Journals Connector (OSTI)

Low-concentration photovoltaic compound parabolic concentrators (PV-CPC) are a significant addition of solar cell application especially in Building Integrated Photovoltaics because it does not need a tracking system and can be installed in a stationary condition. However higher concentrations correspond with the smaller half acceptance angle which is a limitation but can be improved by a lens-walled structure. In this paper to validate the rationale of this structure a low-concentration PV-CPC using an acrylic lens-walled structure module was designed and fabricated with low-cost materials. The corresponding simulation was also performed with different materials to determine whether the factor that the truncation had a significant effect. The observed outcome implied that the low-concentration PV-CPC using an acrylic lens-walled structure has a larger half acceptance angle than the mirror CPC and that a maximum optical efficiency of more than 80% can be achieved using Schott BK glass as the lens wall material. The lens-walled structure improved the angular acceptance of stationary low-concentration PV-CPC providing a basis for further research.

2014-01-01T23:59:59.000Z

63

Layered plasma polymer composite membranes  

DOE Patents (OSTI)

Layered plasma polymer composite fluid separation membranes are disclosed, which comprise alternating selective and permeable layers for a total of at least 2n layers, where n is [>=]2 and is the number of selective layers. 2 figs.

Babcock, W.C.

1994-10-11T23:59:59.000Z

64

Surface characterization of LaMnO{sub 3+{delta}} powder synthesized using poly(acrylic acid)  

SciTech Connect

The La/Mn ratio, specific surface area, and catalytic activity for CO oxidation on perovskite-type LaMnO{sub 3+{delta}} synthesized by firing gels with poly(acrylic acid) (PAA) were measured to characterize the LaMnO{sub 3+{delta}} surface. LaMnO{sub 3+{delta}} synthesized by gel firing with low PAA concentration had a large specific surface area, but a Mn ion content lower than that of LaMnO{sub 3+{delta}} synthesized using acetates. Increasing the PAA concentration or the firing temperature improved the surface state of LaMnO{sub 3+{delta}}. At 5 x 10{sup -2}M PAA, the catalytic activity was better than that of LaMnO{sub 3+{delta}} synthesized using acetates.

Taguchi, Hideki; Yoshioka, Hideaki; Nagao, Mahiko [Okayama Univ. (Japan)

1995-05-01T23:59:59.000Z

65

Behavior of Surface-Anchored Poly(acrylic acid) Brushes with Grafting Density Gradients on Solid Substrates: 1. Experiment  

SciTech Connect

We describe experiments pertaining to the formation of surface-anchored poly(acrylic acid) (PAA) brushes with a gradual variation of the PAA grafting densities on flat surfaces and provide detailed analysis of their properties. The PAA brush gradients are generated by first covering the substrate with a molecular gradient of the polymerization initiator, followed by the 'grafting from' polymerization of tert-butyl acrylate (tBA) from these substrate-bound initiator centers, and finally converting the PtBA into PAA. We use spectroscopic ellipsometry to measure the wet thickness of the grafted PAA chains in aqueous solutions at three different pH values (4, 5.8, and 10) and a series of ionic strengths (IS). Our measurements reveal that at low grafting densities, s, the wet thickness of the PAA brush (H) remains relatively constant, the polymers are in the mushroom regime. Beyond a certain value of s, the macromolecules enter the brush regime, where H increases with increasing s. For a given s, H exhibits a nonmonotonic behavior as a function of the IS. At large IS, the H is small because the charges along PAA are completely screened by the excess of the external salt. As IS decreases, the PAA enters the so-called salt brush (SB) regime, where H increases. At a certain value of IS, H reaches a maximum and then decreases again. The latter is a typical brush behavior in so-called osmotic brush (OB) regime. We provide detailed discussion of the behavior of the grafted PAA chains in the SB and OB regimes.

Wu,T.; Gong, P.; Szleifer, I.; Vicek, P.; Subr, V.; Genzer, J.

2007-01-01T23:59:59.000Z

66

Multiple density layered insulator  

DOE Patents (OSTI)

A multiple density layered insulator for use with a laser is disclosed wh provides at least two different insulation materials for a laser discharge tube, where the two insulation materials have different thermoconductivities. The multiple layer insulation materials provide for improved thermoconductivity capability for improved laser operation.

Alger, Terry W. (Tracy, CA)

1994-01-01T23:59:59.000Z

67

Layering as Optimization Decomposition 3-1 Layering as OptimizationLayering as Optimization  

E-Print Network (OSTI)

1 Layering as Optimization Decomposition 3-1 Layering as OptimizationLayering as Optimization DecompositionDecomposition Layering as Optimization Decomposition 3-2 CONTENTSCONTENTS Introduction (Marta;2 Layering as Optimization Decomposition 3-3 Layering as Optimization Decomposition Introduction By Marta

Fan, Xingzhe

68

Multiple layer insulation cover  

DOE Patents (OSTI)

A multiple layer insulation cover for preventing heat loss in, for example, a greenhouse, is disclosed. The cover is comprised of spaced layers of thin foil covered fabric separated from each other by air spaces. The spacing is accomplished by the inflation of spaced air bladders which are integrally formed in the cover and to which the layers of the cover are secured. The bladders are inflated after the cover has been deployed in its intended use to separate the layers of the foil material. The sizes of the material layers are selected to compensate for sagging across the width of the cover so that the desired spacing is uniformly maintained when the cover has been deployed. The bladders are deflated as the cover is stored thereby expediting the storage process and reducing the amount of storage space required.

Farrell, James J. (Livingston Manor, NY); Donohoe, Anthony J. (Ovid, NY)

1981-11-03T23:59:59.000Z

69

Structured luminescence conversion layer  

DOE Patents (OSTI)

An apparatus device such as a light source is disclosed which has an OLED device and a structured luminescence conversion layer deposited on the substrate or transparent electrode of said OLED device and on the exterior of said OLED device. The structured luminescence conversion layer contains regions such as color-changing and non-color-changing regions with particular shapes arranged in a particular pattern.

Berben, Dirk; Antoniadis, Homer; Jermann, Frank; Krummacher, Benjamin Claus; Von Malm, Norwin; Zachau, Martin

2012-12-11T23:59:59.000Z

70

Evaluation of the 3M Organic Vapor Monitor #3500 as a sampling device for ethyl acrylate and the effect of discontinued exposure on vapor retention  

E-Print Network (OSTI)

Sampling Theories of Adsorption Forces of Adsorption Activation Procedures Surface Structure Statement of Hypotheses METHODOLOGV Test Atmosphere Generation Exposure Chamber MIRAN Calibration and Use Monitor Exposure to EA Analytical Procedures...EVALUATION OF THE 3M ORGANIC VAPOR MONITOR 53500 AS A SAMPLING DEVICE FOR ETHYL ACRYLATE AND THE EFFECT OF DISCONTINUED EXPOSURE ON VAPOP, RETENTION A Thesis by ROBERT WAYNE BARR Submitted to the Graduate College of Texas Al!M University...

Barr, Robert Wayne

2012-06-07T23:59:59.000Z

71

Layered electrode for electrochemical cells  

DOE Patents (OSTI)

There is provided an electrode structure comprising a current collector sheet and first and second layers of electrode material. Together, the layers improve catalyst utilization and water management.

Swathirajan, Swathy (West Bloomfield, MI); Mikhail, Youssef M. (Sterling Heights, MI)

2001-01-01T23:59:59.000Z

72

HiR Thermal Testing Results  

NLE Websites -- All DOE Office Websites (Extended Search)

4 4 position specimen # specimen description (test conditions: cold side -18°C, warm side 21°C) date + time 100 mm from head TC center of glass TC 100 mm from sill TC upper IR line average lower IR line average complete IR line average left 6 triple, 2 sputtered low-e glass layers, uncoated acrylic center layer in grooved spacer (rebuilt), Kr 4/29/05 16:09 18.54 17.98 17.98 17.85 16.77 17.34 right 17 triple, 2 sputtered low-e glass layers, uncoated acrylic center layer with 1/16" perimeter gap, Kr 18.88 16.14 16.08 17.71 14.41 16.15 - Back to Summary - - Back to Summary - - Back to Summary - delta T line average delta T 100mm from head delta T center of glass delta T 100mm from sill ambient high ambient low ambient average six surface average

73

Layered permeable systems  

SciTech Connect

Permeability is a second rank tensor relating flow rate to pressure gradient in a porous medium. If the permeability is a constant times the identity tensor the permeable medium is isotropic; otherwise it is anisotropic. A formalism is presented for the simple calculation of the permeability tensor of a heterogeneous layered system composed of interleaved thin layers of several permeable constituent porous media in the static limit. Corresponding to any cumulative thickness {ital H} of a constituent is an element consisting of scalar {ital H} and a matrix which is {ital H} times a hybrid matrix function of permeability. The calculation of the properties of a medium equivalent to the combination of permeable constituents may then be accomplished by simple addition of the corresponding scalar/matrix elements. Subtraction of an element removes a permeable constituent, providing the means to decompose a permeable medium into many possible sets of permeable constituents, all of which have the same flow properties. A set of layers of a constituent medium in the heterogeneous layered system with permeability of the order of 1{ital h} as {ital h} {r arrow} 0, where {ital h} is that constituent's concentration, acts as a set of infinitely thin channels and is a model for a set of parallel cracks or fractures. Conversely, a set of layers of a given constituent with permeability of the order of {ital h} as {ital h} {r arrow} 0 acts as a set of parallel flow barriers and models a set of parallel, relatively impermeable, interfaces, such as shale stringers or some faults.

Schoenberg, M. (Schlumberger-Doll Research, Ridgefield, CT (US))

1991-02-01T23:59:59.000Z

74

Guided Wave Propagation in Tubular Section with Multi-Layered Viscoelastic Coating  

E-Print Network (OSTI)

. The dispersion of phase velocity and wave attenuation for coated pipes are evaluated against a baseline model which is the bare, uncoated tubing to establish the propagation characteristics of the guided shear and longitudinal waves in the presence of multiple...

Kuo, Chi-Wei 1982-

2012-11-16T23:59:59.000Z

75

Ion transport and structure of layer-by-layer assemblies  

E-Print Network (OSTI)

Layer-by-layer (LbL) films of various architectures were examined as potential solid state electrolytes for electrochemical systems (e.g. batteries and fuel cells). The relationship between materials properties and ion ...

Lutkenhaus, Jodie Lee

2007-01-01T23:59:59.000Z

76

Polyvalent surface modification of hydrocarbon polymers via covalent layer-by-layer self-assembly  

E-Print Network (OSTI)

convenient and simple method leading to highly functionalized product that contains 6-8 % by weight PEI. Superhydrophobic PE films can be formed either from ionic LbL self-assembly of MWNT-NH-PEIs and poly(acrylic acid) or from covalent LbL self-assembly...

Liao, Kang-Shyang

2009-05-15T23:59:59.000Z

77

Theory of Leakage Preventing Layer  

Science Journals Connector (OSTI)

It is a brand new concept for leakage prevention layer. The practice to place HEPA filter at the terminal is improved when the theory of leakage prevention layer applies, which becomes the core of novel air distr...

Zhonglin Xu

2014-01-01T23:59:59.000Z

78

Metal deposition using seed layers  

DOE Patents (OSTI)

Methods of forming a conductive metal layers on substrates are disclosed which employ a seed layer to enhance bonding, especially to smooth, low-roughness or hydrophobic substrates. In one aspect of the invention, the seed layer can be formed by applying nanoparticles onto a surface of the substrate; and the metallization is achieved by electroplating an electrically conducting metal onto the seed layer, whereby the nanoparticles serve as nucleation sites for metal deposition. In another approach, the seed layer can be formed by a self-assembling linker material, such as a sulfur-containing silane material.

Feng, Hsein-Ping; Chen, Gang; Bo, Yu; Ren, Zhifeng; Chen, Shuo; Poudel, Bed

2013-11-12T23:59:59.000Z

79

Photocurrent Generation in Layer-By-Layer Assembled Dendrimers  

NLE Websites -- All DOE Office Websites (Extended Search)

Photocurrent Generation in Layer-By-Layer Assembled Dendrimers with Photocurrent Generation in Layer-By-Layer Assembled Dendrimers with Ruthenium Tris-bipyridine Peripheral Groups and a Viologen-like Core Manal Abi Saab, Rouba Abdel-Malak, James F. Wishart, and Tarek H. Ghaddar Langmuir 23, 10807-10815 (2007). [Find paper at ACS Publications] Abstract: The photophysical and photoelectrochemical properties of first- and second-generation dendrimers with ruthenium tris-bipyridine peripheral groups and a tri-viologen like core (Ru3V3 and Ru6V3) were investigated in solution and when embedded within assembled films. The stepwise assembly of these dendrimers on quartz and ITO surfaces utilizing the layer-by-layer approach was investigated. The amount of the assembled dendrimers was found to increase on going to the higher generation dendrimer. This dendrimer

80

HiR Thermal Testing Results  

NLE Websites -- All DOE Office Websites (Extended Search)

5 5 position specimen # specimen description (test conditions: cold side -18°C, warm side 21°C) date + time 100 mm from head TC center of glass TC 100 mm from sill TC upper IR line average lower IR line average complete IR line average left 6 triple, 2 sputtered low-e glass layers, uncoated acrylic center layer in grooved spacer, Kr 3/15/05 13:40 18.08 17.75 17.91 16.84 17.43 right 8 triple/quad, 2 sputtered low-e layers, 2 layer teflon center insert clinging in center, Kr 18.26 17.58 18.05 17.23 17.67 - Back to Summary - - Back to Summary - - Back to Summary - delta T line average delta T 100mm from head delta T center of glass delta T 100mm from sill ambient high ambient low ambient average six surface average

Note: This page contains sample records for the topic "layers uncoated acrylic" 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

Artificial Neural Networks Single Layer Networks Multi Layer Networks Generalization Artificial Neural Networks  

E-Print Network (OSTI)

Artificial Neural Networks Single Layer Networks Multi Layer Networks Generalization Artificial Neural Networks Artificial Neural Networks Single Layer Networks Multi Layer Networks Generalization 1 Artificial Neural Networks Properties Applications Classical Examples Biological Background 2 Single Layer

Kjellström, Hedvig

82

(STARC), (), (NEC), () 1st. Layer 2nd. Layer 3rd. Layer  

E-Print Network (OSTI)

, , , , , , (STARC), (), (NEC), () PG401 Program BPA RB SB BPA RB SB BPA RB SB BPA RB SB BPA RB SB BPA RB SB BPA RB SB 1st. Layer 2nd. Layer 3rd. Layer Total System BPA BPA 1 BPA 3 BPA2 BPA 4 BPA 5 BPA 6 RB 7 RB15 BPA 8 BPA 9 BPA 10 RB 11 BPA 12 BPA 13 RB 14 RB END RB RB BPA RB Data

Kasahara, Hironori

83

Magnetic properties of layered antiferromagnets  

Science Journals Connector (OSTI)

Magnetic properties of layered antiferromagnets have been studied using correlated effective field (CEF) theory developed by M. E. Lines. This theory goes beyond mean-field theory and correctly reproduces the experimental results. The theory is used here to interpret the magnetic order parameter and the susceptibilities of the FePS3 compound, which is a layered antiferromagnet with a marked Ising anisotropy.

Ibha Chatterjee

1995-02-01T23:59:59.000Z

84

Synthesis of LaMnO{sub 3+{delta}} by firing gels with poly(acrylic acid) in a pure argon stream  

SciTech Connect

Perovskite-type LaMnO{sub 3+{delta}} was synthesized by firing the gels with 0.007-0.033 M of poly(acrylic acid) (PAA) in a pure argon stream. The oxygen content, crystallite size (D{sub 024}), specific surface area, and catalytic activity for CO oxidation in LaMnO{sub 3+{delta}} were measured to characterize the LaMnO{sub 3+{delta}} surface. In spite of a small specific surface area, the catalytic activity for CO oxidation on LaMnO{sub 3+{delta}} fired in the pure argon stream is twice that of LaMnO{sub 3+{delta}} fired in air. These results indicate that firing the gels in the pure argon stream improved the crystallinity (regularity of the ions) of the LaMnO{sub 3+{delta}} surface.

Taguchi, Hideki; Sugita, Akio; Nagao, Mahiko [Okayama Univ. (Japan)] [Okayama Univ. (Japan)

1996-02-01T23:59:59.000Z

85

Nanoengineering Catalyst Supports via Layer-by Layer Surface Functionalization  

SciTech Connect

Recent progress in the layer-by-layer surface modification of oxides for the preparation of highly active and stable gold nanocatalysts is briefly reviewed. Through a layer-by-layer surface modification approach, the surfaces of various catalyst supports including both porous and nonporous silica materials and TiO{sub 2} nanoparticles were modified with monolayers or multilayers of distinct metal oxide ultra-thin films. The surface-modified materials were used as supports for Au nanoparticles, resulting in highly active nanocatalysts for low-temperature CO oxidation. Good stability against sintering under high-temperature treatment was achieved for a number of the Au catalysts through surface modification of the support material. The surface modification of supports can be a viable route to control both the composition and structure of support and nanoparticle interfaces, thereby tailoring the stability and activity of the supported catalyst systems.

Yan, Wenfu [ORNL; Mahurin, Shannon Mark [ORNL; Overbury, Steven {Steve} H [ORNL; Dai, Sheng [ORNL

2006-01-01T23:59:59.000Z

86

Layer-By-Layer Assembled Hybrid Film of Carbon Nanotubes/Iron...  

NLE Websites -- All DOE Office Websites (Extended Search)

By-Layer Assembled Hybrid Film of Carbon NanotubesIron Oxide Nanocrystals for Reagentless Electrochemical Detection of Layer-By-Layer Assembled Hybrid Film of Carbon Nanotubes...

87

Hole in the ozone layer?  

NLE Websites -- All DOE Office Websites (Extended Search)

Hole in the ozone layer? Hole in the ozone layer? Name: Kelley Location: N/A Country: N/A Date: N/A Question: Is there really a hole in the ozone layer? Replies: That depends on what one means by a "hole". There is a thinning of the layer that is particularly severe during certain seasons at the poles. But the ozone layer is thinning most everywhere. The thinning around the south pole of earth is particularly stunning, and has been referred to as a hole even though some ozone still exists there, it is much less concentrated. As you may know, this ozone destruction is probably due to human release of pollutants such as clorofluorocarbons (CFCs) an due to natural sources such as chemicals from volcanic eruptions. CFCs are used is cooling systems such as refrigerators and air conditioning. There is an international agreement to phase out the use of these destructive chemicals but they won't be banned entirely for years for fears of losing money. Meanwhile the ozone layer thins and we are exposed to increasingly higher doses of cancer causing radiation

88

Magnetohydrodynamic boundary layer control system  

SciTech Connect

Accordingly, it is an object of the present invention to provide an active boundary layer control system which is lightweight, operates with low in put power, and occupies little physical space. It is a further object of the invention to provide a boundary layer control system which is robust and can be operated in a damaged condition without creating a hazard to the vehicle. It is yet object of the invention to provide a magnetohydrodynamic (MHD) boundary layer control system for marine vehicles which provides a force directly on the water adjacent to the vehicle hull to provide flow separation control. The invention is a boundary layer control system using magnetic and electric fields interaction to providea driving force to energize boundary layer flow around a marine vehicle. A plurality of magnets are located circumferentially around the hull. Seawater electrodes are placed between each of the magnets and between the poles of each magnet. The resulting interaction of the electric and magnetic fields produces a Lorentz force which reduces the turbulence and may even relaminarize the flow in the boundary layer.

Meng, J.C.

1993-02-11T23:59:59.000Z

89

The limited growth of vegetated shear layers  

E-Print Network (OSTI)

In contrast to free shear layers, which grow continuously downstream, shear layers generated by submerged vegetation grow only to a finite thickness. Because these shear layers are characterized by coherent vortex structures ...

Ghisalberti, M.

90

Energy transport in the solar transition layer  

Science Journals Connector (OSTI)

...research-article Research Article Energy transport in the solar transition layer J...emission measure in the solar transition layer, which...the heat transport. solar transition layer|differential emission measure|energy transport|ion-acoustic...

2001-01-01T23:59:59.000Z

91

Artificial Neural Networks Single Layer Networks Multi Layer Networks Generalization Artificial Neural Networks  

E-Print Network (OSTI)

Artificial Neural Networks Single Layer Networks Multi Layer Networks Generalization Artificial Neural Networks #12;Artificial Neural Networks Single Layer Networks Multi Layer Networks Generalization 1 Artificial Neural Networks Properties Applications Classical Examples Biological Background 2

Kjellström, Hedvig

92

Hydrogen in magnesium palladium thin layer structures.  

E-Print Network (OSTI)

??In this thesis, the study of hydrogen storage, absorption and desorption in magnesium layers is described. The magnesium layers have a thickness of 50-500 nm… (more)

Kruijtzer, G.L.

2008-01-01T23:59:59.000Z

93

HiR Thermal Testing Results  

NLE Websites -- All DOE Office Websites (Extended Search)

5 5 position specimen # specimen description (test conditions: cold side -18°C, warm side 21°C) date + time 100 mm from head TC center of glass TC 100 mm from sill TC upper IR line average lower IR line average complete IR line average left 6 triple, 2 sputtered low-e glass layers, uncoated acrylic center layer in grooved spacer (rebuilt), Kr 5/4/05 21:29 18.57 17.93 17.92 17.66 16.52 17.13 right 18 triple, 2 sputtered low-e glass layers, uncoated glass center layer in traditional broken spacer, Kr 18.54 18.38 17.67 17.81 16.85 17.37 - Back to Summary - - Back to Summary - - Back to Summary - delta T line average delta T 100mm from head delta T center of glass delta T 100mm from sill ambient high ambient low ambient average six surface average

94

Origin of the Difference in Structural Behavior of Poly(acrylic acid) and Poly(methacrylic acid) in Aqueous Solution Discerned by Explicit-Solvent Explicit-Ion MD Simulations  

Science Journals Connector (OSTI)

Origin of the Difference in Structural Behavior of Poly(acrylic acid) and Poly(methacrylic acid) in Aqueous Solution Discerned by Explicit-Solvent Explicit-Ion MD Simulations ... Polyelectrolytes such as sodium polyacrylate (Na-PAA) are widely used as adhesives, dispersants, wetting agents, and additives in coatings. ... Levitt, M.; Hirshberg, M.; Sharon, R.; Daggett, V.Potential energy function and parameters for simulations of the molecular dynamics of proteins and nucleic acids in solution Comput. ...

Muralidharan S. Sulatha; Upendra Natarajan

2011-10-10T23:59:59.000Z

95

Surface monolayers of well-defined amphiphilic block copolymer composed of poly(acrylic acid) or poly(oxyethylene) and poly(styrene). Interpolymer complexation at the air-water interface  

SciTech Connect

Amphiphilic block polymers (2,3) composed of poly(acrylic acid) (PAA) or poly(oxyethylene) (POE) and chain length controlled poly(styrene) (PSt) have been prepared by using a catalytic system of tribromomethyl-terminated oligomer and manganese carbonyl. All the amphiphilic materials formed well-behaved surface monolayers, and the II-A curves for them expanded systematically with an increase of the PSt chain length.

Niwa, Masazo; Hayashi, Takehiro; Higashi, Nobuyuki (Doshisha Univ., Kyoto (Japan))

1990-01-01T23:59:59.000Z

96

Layered architecture for quantum computing  

E-Print Network (OSTI)

We develop a layered quantum computer architecture, which is a systematic framework for tackling the individual challenges of developing a quantum computer while constructing a cohesive device design. We discuss many of the prominent techniques for implementing circuit-model quantum computing and introduce several new methods, with an emphasis on employing surface code quantum error correction. In doing so, we propose a new quantum computer architecture based on optical control of quantum dots. The timescales of physical hardware operations and logical, error-corrected quantum gates differ by several orders of magnitude. By dividing functionality into layers, we can design and analyze subsystems independently, demonstrating the value of our layered architectural approach. Using this concrete hardware platform, we provide resource analysis for executing fault-tolerant quantum algorithms for integer factoring and quantum simulation, finding that the quantum dot architecture we study could solve such problems on the timescale of days.

N. Cody Jones; Rodney Van Meter; Austin G. Fowler; Peter L. McMahon; Jungsang Kim; Thaddeus D. Ladd; Yoshihisa Yamamoto

2012-09-27T23:59:59.000Z

97

The continental layers of Europe  

Science Journals Connector (OSTI)

...in the Love-wave equation. TIIE COI~TIIqENTAL LAYERS OF EUI~OFE 271 DISCUSSIONOF RESULTS The suggestion that the intermediate...of Sciences, 44:2-12 (1941). THE CONTINENTALLAYERSOF EUI%OPE 273 that in the neighborhood of Hawaii the regional compensation...

Robert Stoneley

98

A novel hohlraum with ultrathin depleted-uranium-nitride coating layer for low hard x-ray emission and high radiation temperature  

E-Print Network (OSTI)

An ultra-thin layer of uranium nitrides (UN) has been coated on the inner surface of the depleted uranium hohlraum (DUH), which has been proved by our experiment can prevent the oxidization of Uranium (U) effectively. Comparative experiments between the novel depleted uranium hohlraum and pure golden (Au) hohlraum are implemented on Shenguang III prototype laser facility. Under the laser intensity of 6*10^14 W/cm2, we observe that, the hard x-ray (> 1.8 keV) fraction of this uranium hohlraum decreases by 61% and the peak intensity of total x-ray flux (0.1 keV ~ 5 keV) increases by 5%. Two dimensional radiation hydrodynamic code LARED are exploited to interpret the above observations. Our result for the first time indicates the advantage of the UN-coated DUH in generating the uniform x-ray field with a quasi Planckian spectrum and thus has important implications in optimizing the ignition hohlraum design.

Guo, Liang; Xing, Peifeng; Li, Sanwei; Yi, Taimin; Kuang, Longyu; Li, Zhichao; Li, Renguo; Wu, Zheqing; Jing, Longfei; Zhang, Wenhai; Zhan, Xiayu; Yang, Dong; Jiang, Bobi; Yang, Jiamin; Liu, Shenye; Jiang, Shaoen; Li, Yongsheng; Liu, Jie; Huo, Wenyi; Lan, Ke

2014-01-01T23:59:59.000Z

99

Preparation of water-soluble ?-cyclodextrin/poly(acrylic acid)/graphene oxide nanocomposites as new adsorbents to remove cationic dyes from aqueous solutions  

Science Journals Connector (OSTI)

Abstract Novel nanocomposites of ?-cyclodextrin/poly(acrylic acid) grafted onto graphene oxide (?-CD/PAA/GO) were successfully synthesized for the first time using an esterification reaction, and they were used to remove the cationic dyes methylene blue (MB) and safranine T (ST) from aqueous solutions. The as-prepared ?-CD/PAA/GO nanocomposites were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, and X-ray diffraction analysis. The ?-CD/PAA/GO nanocomposites showed excellent water dispersibility because of the hydrophilicity of the polymer. The adsorption isotherms fitted the Langmuir isotherm model. The maximum adsorption capacities were 247.99 mg g?1 for MB and 175.49 mg g?1 for ST, and these are much higher than those of other carbon-based adsorbents that have been described in the literature. This was attributed to the high concentration of functional groups in the nanocomposites. Repeated MB and ST adsorption and desorption cycles showed that the ?-CD/PAA/GO nanocomposites could be used repeatedly, and their adsorption capacities did not change significantly after five cycles. The fast and efficient adsorption of MB and ST by the ?-CD/PAA/GO nanocomposites from aqueous solutions suggested that these novel nanocomposites may be ideal candidates for removing dyes during water treatment.

Jinshui Liu; Guoning Liu; Wenxiu Liu

2014-01-01T23:59:59.000Z

100

Interaction modes between heavy metal ions and water-soluble polymers. 2. Spectroscopic and magnetic reexamination of the aqueous solutions of cupric ions and poly(acrylic acid)  

SciTech Connect

The interaction between cupric ions and poly(acrylic acid) (PAA) in aqueous solutions has been reexamined by EPR, magnetic susceptibility, and optical absorption. Cupric ions exist in solutions at pH < 3 as ordinary hydrated ions, and in the pH range 3-8, two mononuclear complexes with carboxyl groups of PAA are formed in equilibrium with other complex species; the two complexes have the same coordination structures as Cu(OAc)/sup +/ and Cu(OAc)/sub 2/, where OAc/sup -/ denotes acetate anion. Around pH 4, two slightly different binuclear copper(II) complexes of the cupric acetate type are formed in high yields; at (PAA polymer residue)/(Cu/sup 2 +/) less than or equal to 10, about 90% of the cupric ions form such binuclear complexes. At pH > 6, Cu(OH)/sub 2/ is gradually formed and complex species other than Cu(OH)/sub 2/ finally disappear at pH > 9. Cu(OH)/sub 2/ does not deposit but remains in solution by hydrophobic interaction with PAA, as in the case with poly(vinyl alcohol).

Yokoi, H.; Kawata, S.; Iwaizumi, M.

1986-06-11T23:59:59.000Z

Note: This page contains sample records for the topic "layers uncoated acrylic" 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

pH- and ionic-strength-induced structural changes in poly(acrylic acid)-lipid-based self-assembled materials.  

SciTech Connect

The effect of a polyanion introduced as a lipid conjugate (poly(acrylic acid)- dimyristoyl-sn-glycero-3-phosphoethanolamine, PAA-DMPE) on the structure of a self-assembled, biomembrane mimetic has been evaluated using synchrotron small-angle X-ray scattering (SAXS). At high grafting density (8-11 mol.%), the PAA chains were found to produce significant changes in structure in response to changes in pH and electrolyte composition. At low pH and in the absence of salt (NaCl), the neutral PAA chains adopt a coil conformational state that leads to the formation of a swollen lamellar structure. Upon the addition of salt at low to intermediate pH values, two lamellar phases, a collapsed and an expanded structure, coexist. Finally, when the polymer is fully ionized (at high pH), the extended conformation of the polymer generates a cubic phase. The results of this study contribute to an understanding of how polyelectrolytes may ultimately be harnessed for the preparation of self-assembling materials responsive to external stimuli.

Crisci, A.; Hay, D. N. T.; Seifert, S.; Firestone, M. A.

2009-01-01T23:59:59.000Z

102

Interpolymer complexation of poly(acrylic acid) and poly(acrylamide): Structural and dynamic studies by solution- and solid-state NMR  

SciTech Connect

Understanding the structure and dynamics of intermacromolecular complexes is of interest because of the occurrence of such structures in many systems of biological importance. Interpolymeric complexes of poly(acrylic acid) PAA and poly(acrylamide) (PAAm) at 60, 20, 5, and 0% ionization ([alpha]) were studied by [sup 1]H/[sup 13]C solution-state and [sup 13]C solid-state cross-polarization magic angle spinning (CPMAS) NMR experiments. The solid-state NMR results support a model in which ionization ([alpha] or pD) alteration leads to conformation and segment changes along the PAA-PAAm polymeric backbone. Solid-state relaxation measurements show short T[sub 1] values at high ionization ([alpha] = 60%) but long T[sub 1] values toward low ionization ([alpha] [<=] 20%). This is consistent with a model in which the PAA and PAAm polymers take on a stretched but mobile conformation at high ionization but become immobile and restricted at low ionization. Dynamic restriction of the polymer is attributed to symbiotic hydrogen bonding of the carboxyl group of PAA and the amide residue of PAAm to form interpolymer complexes. Other relaxation parameters such as [sup 1]H-[sup 13]C cross-polarization times T[sub CH](SL), proton spin-lattice relaxation times in the rotating frame T[sub 1p](H), and [sup 13]C dipolar-dephasing results are also consistent with this model.

Garces, F.O. (Univ. of San Diego, CA (United States). Dept. of Chemistry); Sivadasan, K.; Somasundaran, P. (Columbia Univ., New York, NY (United States). Henry Krumb School of Mines); Turro, N.J. (Columbia Univ., New York, NY (United States). Dept. of Chemistry)

1994-01-01T23:59:59.000Z

103

Chemical solution seed layer for rabits tapes  

SciTech Connect

A method for making a superconducting article includes the steps of providing a biaxially textured substrate. A seed layer is then deposited. The seed layer includes a double perovskite of the formula A.sub.2B'B''O.sub.6, where A is rare earth or alkaline earth metal and B' and B'' are different rare earth or transition metal cations. A superconductor layer is grown epitaxially such that the superconductor layer is supported by the seed layer.

Goyal, Amit; Paranthaman, Mariappan; Wee, Sung-Hun

2014-06-10T23:59:59.000Z

104

Electronic transport in atomically thin layered materials  

E-Print Network (OSTI)

Electronic transport in atomically thin layered materials has been a burgeoning field of study since the discovery of isolated single layer graphene in 2004. Graphene, a semi-metal, has a unique gapless Dirac-like band ...

Baugher, Britton William Herbert

2014-01-01T23:59:59.000Z

105

A World-wide Stratospheric Aerosol Layer  

Science Journals Connector (OSTI)

...Massachusetts An aerosol layer has been identified by a stratospheric balloon and aircraft aerosol collection program. Measurements...Abstract. An aerosol layer has been identified by a stratospheric balloon and aircraft aerosol collection program. Meas-urements...

Christian E. Junge; Charles W. Chagnon; James E. Manson

1961-05-12T23:59:59.000Z

106

Measurement of layer breathing mode vibrations in few-layer graphene  

Science Journals Connector (OSTI)

Layer-layer coupling plays a critical role in defining the physical properties of few-layer graphene. With respect to vibrations, for each layer thickness N, interlayer coupling creates a set of N?1 out-of-plane layer breathing modes (ZO?) with finite frequencies at the zone center. Unlike the widely studied intralayer vibrations, the properties of these layer breathing modes (LBMs) are defined by the layer-layer interactions. Here we report the observation of distinct LBMs for Bernal stacked graphene of layer thicknesses N = 2–20 through measurement of electronically resonant overtone Raman bands. The Raman bands exhibit multipeak features that are unique for graphene samples of each layer thickness. The frequencies can be described well using a simple linear-chain model based on nearest-neighbor couplings between the layers.

Chun Hung Lui and Tony F. Heinz

2013-03-12T23:59:59.000Z

107

Electrochemical and in situ ellipsometric investigation of the permeability and stability of layered polyelectrolyte films  

SciTech Connect

Utilization of layered polyelectrolyte films as sensor or iron-separation materials will depend critically on their stability and ion permeability in aqueous solution. The authors report electrochemical and in situ ellipsometric studies on the permeability and stability of poly(allylamine hydrochloride)/poly(styrenesulfonate) (PAH/PSS) and PAH/poly(acrylic acid) (PAA) films. The permeability of these layered polyelectrolyte films to Fe(CN){sub 6}{sup 3-} and Ru(NH{sub 3}){sub 6}{sup 3+} depends on the solution pH, the number of bilayers in the film, whether supporting electrolyte is present during film deposition, and the nature of constituent polycations and polyanions. Cyclic voltammetry and impedance spectroscopy show that film permeability is similar in pH 3.2- and pH 6.3-buffered solutions but increases dramatically in alkaline solutions. In situ ellipsometry helps to explain these results. Upon immersion in pH 3.2 and pH 6.3-buffered solutions, the thickness of PAH/PSS films increases by 40%, but swelling is constant over time. At pH 10, these films initially swell by 40% but then continue to swell for several minutes before delaminating. The onset of increased swelling corresponds with dramatic increases in film permeability. Both peak current (cyclic voltammetry) and charge-transfer resistance (ac impedance) depend nonlinearly on the number of polyelectrolyte bilayers. The structure of the first two bilayers is more porous than that of later bilayers. Adding supporting electrolyte to deposition solutions results in thicker bilayers and changes film permeability. For PAH/PSS films, the use of supporting electrolyte during film formation results in a much less permeable film (comparing films of similar thickness). In PAH/PAA films, however, the use of supporting salt results in highly permeable films (even with thicknesses as high as 44 nm). Thus proper choice of constituent polyelectrolytes and deposition conditions permits control over the permeability of layered polyelectrolyte films.

Harris, J.J.; Bruening, M.L.

2000-02-22T23:59:59.000Z

108

Nanomanufacturing : nano-structured materials made layer-by-layer.  

SciTech Connect

Large-scale, high-throughput production of nano-structured materials (i.e. nanomanufacturing) is a strategic area in manufacturing, with markets projected to exceed $1T by 2015. Nanomanufacturing is still in its infancy; process/product developments are costly and only touch on potential opportunities enabled by growing nanoscience discoveries. The greatest promise for high-volume manufacturing lies in age-old coating and imprinting operations. For materials with tailored nm-scale structure, imprinting/embossing must be achieved at high speeds (roll-to-roll) and/or over large areas (batch operation) with feature sizes less than 100 nm. Dispersion coatings with nanoparticles can also tailor structure through self- or directed-assembly. Layering films structured with these processes have tremendous potential for efficient manufacturing of microelectronics, photovoltaics and other topical nano-structured devices. This project is designed to perform the requisite R and D to bring Sandia's technology base in computational mechanics to bear on this scale-up problem. Project focus is enforced by addressing a promising imprinting process currently being commercialized.

Cox, James V.; Cheng, Shengfeng; Grest, Gary Stephen; Tjiptowidjojo, Kristianto (University of New Mexico); Reedy, Earl David, Jr.; Fan, Hongyou; Schunk, Peter Randall; Chandross, Michael Evan; Roberts, Scott A.

2011-10-01T23:59:59.000Z

109

Electrical Engineering and Computer Cross-Layer Design  

E-Print Network (OSTI)

Electrical Engineering and Computer Science Cross-Layer Design and Analysis of Wireless Networks Wayne Stark Achilleas Anastasopoulos, Shihyu Chang, Hua Wang University of Michigan #12;Electrical Layer Design #12;Electrical Engineering and Computer Science Layered Approach Presentation Layer Session

110

Superconductive articles including cerium oxide layer  

DOE Patents (OSTI)

A ceramic superconductor comprising a metal oxide substrate, a ceramic high temperature superconductive material, and a intermediate layer of a material having a cubic crystal structure, said layer situated between the substrate and the superconductive material is provided, and a structure for supporting a ceramic superconducting material is provided, said structure comprising a metal oxide substrate, and a layer situated over the surface of the substrate to substantially inhibit interdiffusion between the substrate and a ceramic superconducting material deposited upon said structure.

Wu, Xin D. (Greenbelt, MD); Muenchausen, Ross E. (Espanola, NM)

1993-01-01T23:59:59.000Z

111

Multiple Layer Graphene Optical Modulator - Energy Innovation...  

NLE Websites -- All DOE Office Websites (Extended Search)

Materials Advanced Materials Find More Like This Return to Search Multiple Layer Graphene Optical Modulator Lawrence Berkeley National Laboratory Contact LBL About This...

112

Electronic Transport in Few-layer Graphene  

E-Print Network (OSTI)

in Charge Neutral Bilayer Graphene Introduction In thisstudy on heterogeneous graphene devices in a differentto probe few layer graphene to determine their dependence on

Zhao, Zeng

2013-01-01T23:59:59.000Z

113

Enhanced Densification of SDC Barrier Layers  

SciTech Connect

This technical report explores the Enhanced Densification of SCD Barrier Layers A samaria-doped ceria (SDC) barrier layer separates the lanthanum strontium cobalt ferrite (LSCF) cathode from the yttria-stabilized zirconia (YSZ) electrolyte in a solid oxide fuel cell (SOFC) to prevent the formation of electrically resistive interfacial SrZrO{sub 3} layers that arise from the reaction of Sr from the LSCF with Zr from the YSZ. However, the sintering temperature of this SDC layer must be limited to {approx}1200 C to avoid extensive interdiffusion between SDC and YSZ to form a resistive CeO{sub 2}-ZrO{sub 2} solid solution. Therefore, the conventional SDC layer is often porous and therefore not as impervious to Sr-diffusion as would be desired. In the pursuit of improved SOFC performance, efforts have been directed toward increasing the density of the SDC barrier layer without increasing the sintering temperature. The density of the SDC barrier layer can be greatly increased through small amounts of Cu-doping of the SDC powder together with increased solids loading and use of an appropriate binder system in the screen print ink. However, the resulting performance of cells with these barrier layers did not exhibit the expected increase in accordance with that achieved with the prototypical PLD SDC layer. It was determined by XRD that increased sinterability of the SDC also results in increased interdiffusivity between the SDC and YSZ, resulting in formation of a highly resistive solid solution.

Hardy, John S.; Templeton, Jared W.; Lu, Zigui; Stevenson, Jeffry W.

2011-09-12T23:59:59.000Z

114

The Cisco SRP MAC Layer Protocol  

Science Journals Connector (OSTI)

This document specifies the MAC layer protocol, "Spatial Reuse Protocol" (SRP) for use with ring based media. This is a second version of the protocol (V2).

D. Tsiang; G. Suwala

2000-08-01T23:59:59.000Z

115

Heat insulation layer of polymer composite material  

Science Journals Connector (OSTI)

A new heat insulation layer polymer composite material is developed, within whose composition there is foam polyurethane and basaltoplastic. Results are provided for...

G. P. Ponomareva; A. A. Artemenko; O. M. Sladkov…

2010-05-01T23:59:59.000Z

116

Self-Assembly of Layered Membranes  

NLE Websites -- All DOE Office Websites (Extended Search)

| 2004 | 2003 | 2002 2001 | 2000 | 1998 | Subscribe to APS Science Highlights rss feed Self-Assembly of Layered Membranes October 27, 2014 Bookmark and Share Fig. 1. Schematic...

117

Boundary-Layer Effects in Reverse Osmosis  

Science Journals Connector (OSTI)

Boundary-Layer Effects in Reverse Osmosis ... In FO, water is extracted from a feed solution using the high osmotic pressure of a hypertonic solution that flows on ... ...

Ulrich Merten; H. K. Lonsdale; R. L. Riley

1964-01-01T23:59:59.000Z

118

Layer-by-Layer Assembly of a pH-Responsive and Electrochromic Thin Film  

E-Print Network (OSTI)

This article summarizes an experiment on thin-film fabrication with layer-by-layer assembly that is appropriate for undergraduate laboratory courses. The purpose of this experiment is to teach students about self-assembly ...

Schmidt, Daniel J.

119

An ultra-thin buffer layer for Ge epitaxial layers on Si  

SciTech Connect

Using an Fe{sub 3}Si insertion layer, we study epitaxial growth of Ge layers on a Si substrate by a low-temperature molecular beam epitaxy technique. When we insert only a 10-nm-thick Fe{sub 3}Si layer in between Si and Ge, epitaxial Ge layers can be obtained on Si. The detailed structural characterizations reveal that a large lattice mismatch of {approx}4% is completely relaxed in the Fe{sub 3}Si layer. This means that the Fe{sub 3}Si layers can become ultra-thin buffer layers for Ge on Si. This method will give a way to realize a universal buffer layer for Ge, GaAs, and related devices on a Si platform.

Kawano, M.; Yamada, S.; Tanikawa, K.; Miyao, M.; Hamaya, K. [Department of Electronics, Kyushu University, 744 Motooka, Fukuoka 819-0395 (Japan)] [Department of Electronics, Kyushu University, 744 Motooka, Fukuoka 819-0395 (Japan); Sawano, K. [Advanced Research Laboratories, Tokyo City University, 8-15-1 Todoroki, Tokyo 158-0082 (Japan)] [Advanced Research Laboratories, Tokyo City University, 8-15-1 Todoroki, Tokyo 158-0082 (Japan)

2013-03-25T23:59:59.000Z

120

Layer-by-layer assembly on polyethylene films via "click" chemistry  

E-Print Network (OSTI)

LAYER-BY-LAYER ASSEMBLY ON POLYETHYLENE FILMS VIA ?CLICK? CHEMISTRY A Thesis by BRANDON SCOTT CHANCE Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree... of MASTER OF SCIENCE May 2007 Major Subject: Chemistry LAYER-BY-LAYER ASSEMBLY ON POLYETHYLENE FILMS VIA ?CLICK? CHEMISTRY A Thesis by BRANDON SCOTT CHANCE Submitted to the Office of Graduate Studies of Texas A&M University...

Chance, Brandon Scott

2009-05-15T23:59:59.000Z

Note: This page contains sample records for the topic "layers uncoated acrylic" 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

Physical layer model design for wireless networks  

E-Print Network (OSTI)

and shown to be deficient for low to moderate signal-to-noise ratios. The physical layer statistics are investigated, and the run length distributions of the good and bad frames are demonstrated to be the key statistics for accurate physical layer modeling...

Yu, Yi

2009-06-02T23:59:59.000Z

122

Uncertainty in Quantitative Thin-Layer Chromatography  

Science Journals Connector (OSTI)

......and cross-border issues force analysts not only to standardize...uncertainty is developed for fundamental metrological research and is...New York, NY, 1987. 7. Handbook of Thin-Layer Chromatography...New York, NY, 1994. 9. Handbook of Thin-Layer Chromatography......

Mirko Prosek; Alenka Golc-Wondra; Irena Vovk

123

Gaussian beams in inhomogeneous anisotropic layered structures  

E-Print Network (OSTI)

Gaussian beams in inhomogeneous anisotropic layered structures Vlastislav Cerven´y 1 ) and Ivan@ig.cas.cz. Summary Gaussian beams concentrated close to rays of high-frequency seismic body waves prop- agating in an inhomogeneous anisotropic layered structure are studied. The amplitude profiles of the Gaussian beam along

Cerveny, Vlastislav

124

Wetpaint: scraping through multi-layered images  

Science Journals Connector (OSTI)

We introduce a technique for exploring multi-layered images by scraping arbitrary areas to determine meaningful relationships. Our system, called Wetpaint, uses perceptual depth cues to help users intuitively navigate between corresponding layers of ... Keywords: large screen, restoration, tangible user interface, touch interface, visualization

Leonardo Bonanni; Xiao Xiao; Matthew Hockenberry; Praveen Subramani; Hiroshi Ishii; Maurizio Seracini; Jurgen Schulze

2009-04-01T23:59:59.000Z

125

ARM - Measurement - Planetary boundary layer height  

NLE Websites -- All DOE Office Websites (Extended Search)

govMeasurementsPlanetary boundary layer height govMeasurementsPlanetary boundary layer height ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Planetary boundary layer height Top of the planetary boundary layer; also known as depth or height of the mixing layer. Categories Atmospheric State Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments VCEIL : Vaisala Ceilometer External Instruments NCEPGFS : National Centers for Environment Prediction Global Forecast System Field Campaign Instruments

126

Channel cracks in atomic-layer and molecular-layer deposited multilayer thin film coatings  

SciTech Connect

Metal oxide thin film coatings produced by atomic layer deposition have been shown to be an effective permeation barrier. The primary failure mode of such coatings under tensile loads is the propagation of channel cracks that penetrate vertically into the coating films. Recently, multi-layer structures that combine the metal oxide material with relatively soft polymeric layers produced by molecular layer deposition have been proposed to create composite thin films with desired properties, including potentially enhanced resistance to fracture. In this paper, we study the effects of layer geometry and material properties on the critical strain for channel crack propagation in the multi-layer composite films. Using finite element simulations and a thin-film fracture mechanics formalism, we show that if the fracture energy of the polymeric layer is lower than that of the metal oxide layer, the channel crack tends to penetrate through the entire composite film, and dividing the metal oxide and polymeric materials into thinner layers leads to a smaller critical strain. However, if the fracture energy of the polymeric material is high so that cracks only run through the metal oxide layers, more layers can result in a larger critical strain. For intermediate fracture energy of the polymer material, we developed a design map that identifies the optimal structure for given fracture energies and thicknesses of the metal oxide and polymeric layers. These results can facilitate the design of mechanically robust permeation barriers, an important component for the development of flexible electronics.

Long, Rong, E-mail: rlongmech@gmail.com [Department of Mechanical Engineering, University of Alberta, Edmonton, Alberta T6G 2G8 (Canada); Department of Mechanical Engineering, University of Colorado, Boulder, Colorado 80309 (United States); Dunn, Martin L. [Department of Mechanical Engineering, University of Colorado, Boulder, Colorado 80309 (United States); Singapore University of Technology and Design, Singapore 138682 (Singapore)

2014-06-21T23:59:59.000Z

127

Superconductive articles including cerium oxide layer  

DOE Patents (OSTI)

A ceramic superconductor comprising a metal oxide substrate, a ceramic high temperature superconductive material, and a intermediate layer of a material having a cubic crystal structure, said layer situated between the substrate and the superconductive material is provided, and a structure for supporting a ceramic superconducting material is provided, said structure comprising a metal oxide substrate, and a layer situated over the surface of the substrate to substantially inhibit interdiffusion between the substrate and a ceramic superconducting material deposited upon said structure. 7 figures.

Wu, X.D.; Muenchausen, R.E.

1993-11-16T23:59:59.000Z

128

Raman Spectrum of Graphene and Graphene Layers  

Science Journals Connector (OSTI)

Graphene is the two-dimensional building block for carbon allotropes of every other dimensionality. We show that its electronic structure is captured in its Raman spectrum that clearly evolves with the number of layers. The D peak second order changes in shape, width, and position for an increasing number of layers, reflecting the change in the electron bands via a double resonant Raman process. The G peak slightly down-shifts. This allows unambiguous, high-throughput, nondestructive identification of graphene layers, which is critically lacking in this emerging research area.

A. C. Ferrari; J. C. Meyer; V. Scardaci; C. Casiraghi; M. Lazzeri; F. Mauri; S. Piscanec; D. Jiang; K. S. Novoselov; S. Roth; A. K. Geim

2006-10-30T23:59:59.000Z

129

Method for forming a barrier layer  

SciTech Connect

Cubic or metastable cubic refractory metal carbides act as barrier layers to isolate, adhere, and passivate copper in semiconductor fabrication. One or more barrier layers of the metal carbide are deposited in conjunction with copper metallizations to form a multilayer characterized by a cubic crystal structure with a strong (100) texture. Suitable barrier layer materials include refractory transition metal carbides such as vanadium carbide (VC), niobium carbide (NbC), tantalum carbide (TaC), chromium carbide (Cr.sub.3 C.sub.2), tungsten carbide (WC), and molybdenum carbide (MoC).

Weihs, Timothy P. (Baltimore, MD); Barbee, Jr., Troy W. (Palo Alto, CA)

2002-01-01T23:59:59.000Z

130

Green Solvents in Thin-Layer Chromatography  

Science Journals Connector (OSTI)

In this chapter green solvents used in thin-layer chromatography (TLC) are discussed in detail. These green solvents eradicate or minimize the use of volatile organic solvents and protect the environment from fur...

Ali Mohammad; Inamuddin; Asma Siddiq; Mu. Naushad; Gaber E. El-Desoky

2012-01-01T23:59:59.000Z

131

Neutron scattering from adsorbed polymer layers  

Science Journals Connector (OSTI)

Neutron scattering from adsorbed polymer layers ... Small-Angle Neutron Scattering Study of Cyclic Poly(ethylene glycol) Adsorption on Colloidal Particles ... Small-Angle Neutron Scattering Study of Cyclic Poly(ethylene glycol) Adsorption on Colloidal Particles ...

Terence Cosgrove; Timothy G. Heath; Keith Ryan; Trevor L. Crowley

1987-11-01T23:59:59.000Z

132

Layered solid sorbents for carbon dioxide capture  

DOE Patents (OSTI)

A solid sorbent for the capture and the transport of carbon dioxide gas is provided having at least one first layer of a positively charged material that is polyethylenimine or poly(allylamine hydrochloride), that captures at least a portion of the gas, and at least one second layer of a negatively charged material that is polystyrenesulfonate or poly(acryclic acid), that transports the gas, wherein the second layer of material is in juxtaposition to, attached to, or crosslinked with the first layer for forming at least one bilayer, and a solid substrate support having a porous surface, wherein one or more of the bilayers is/are deposited on the surface of and/or within the solid substrate. A method of preparing and using the solid sorbent is provided.

Li, Bingyun; Jiang, Bingbing; Gray, McMahan L; Fauth, Daniel J; Pennline, Henry W; Richards, George A

2014-11-18T23:59:59.000Z

133

Counting molecular-beam grown graphene layers  

SciTech Connect

We have used the ratio of the integrated intensity of graphene's Raman G peak to that of the silicon substrate's first-order optical phonon peak, accurately to determine the number of graphene layers across our molecular-beam (MB) grown graphene films. We find that these results agree well both, with those from our own exfoliated single and few-layer graphene flakes, and with the results of Koh et al.[ACS Nano 5, 269 (2011)]. We hence distinguish regions of single-, bi-, tri-, four-layer, etc., graphene, consecutively, as we scan coarsely across our MB-grown graphene. This is the first, but crucial, step to being able to grow, by such molecular-beam-techniques, a specified number of large-area graphene layers, to order.

Plaut, Annette S. [School of Physics, University of Exeter, Exeter EX4 4QL (United Kingdom)] [School of Physics, University of Exeter, Exeter EX4 4QL (United Kingdom); Wurstbauer, Ulrich [Department of Physics, Columbia University, New York, New York 10027 (United States)] [Department of Physics, Columbia University, New York, New York 10027 (United States); Pinczuk, Aron [Department of Physics, Columbia University, New York, New York 10027 (United States) [Department of Physics, Columbia University, New York, New York 10027 (United States); Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027 (United States); Garcia, Jorge M. [MBE Lab, IMM-Instituto de Microelectronica de Madrid (CNM-CSIC), Madrid, E-28760 (Spain)] [MBE Lab, IMM-Instituto de Microelectronica de Madrid (CNM-CSIC), Madrid, E-28760 (Spain); Pfeiffer, Loren N. [Electrical Engineering Department, Princeton University, New Jersey 08544 (United States)] [Electrical Engineering Department, Princeton University, New Jersey 08544 (United States)

2013-06-17T23:59:59.000Z

134

Wetpaint: Scraping Through Multi-Layered Images  

E-Print Network (OSTI)

We introduce a technique for exploring multi-layered images by scraping arbitrary areas to determine meaningful relationships. Our system, called Wetpaint, uses perceptual depth cues to help users intuitively navigate ...

Bonanni, Leonardo Amerigo

135

Finite element analysis of shells with layers  

E-Print Network (OSTI)

It is well established that thin shell structures frequently feature narrow bands of strain concentration and localized displacement irregularities referred to as boundary and internal layers. It is crucial to capture these ...

Hiller, Jean-François, 1974-

2002-01-01T23:59:59.000Z

136

Nanopatterned anchoring layers for liquid crystals  

E-Print Network (OSTI)

This thesis describes the theory and fabrication of inhomogeneous Liquid Crystal anchoring layers. While chemical anchoring techniques have proved useful for many applications, especially Liquid Crystal Displays, they have ...

Gear, Christopher S. (Christopher Stanwood)

2014-01-01T23:59:59.000Z

137

Patch antennas with new artificial magnetic layers  

E-Print Network (OSTI)

A new type of high-impedance surfaces (HIS) has been introduced by C.R. Simovski et al. recently. In this paper, we propose to use such layers as artificial magnetic materials in the design of patch antennas. The new HIS is simulated and patch antennas partially filled by these composite layers are measured in order to test how much the antenna dimensions can be reduced. In order to experimentally investigate the frequency behavior of the material, different sizes of the patches are designed and tested with the same material layer. Also the height of the patch is changed in order to find the best possible position for minimizing the antenna size. This composite layer of an artificial magnetic material has made the antenna smaller while keeping the bandwidth characteristics of the antenna about the same. About 40% of size reduction has been achieved.

M. Ermutlu; C. R. Simovski; M. Karkainen; P. Ikonen; A. A. Sochava; S. A. Tretyakov

2005-04-11T23:59:59.000Z

138

Optical devices featuring textured semiconductor layers  

DOE Patents (OSTI)

A semiconductor sensor, solar cell or emitter, or a precursor therefor, has a substrate and one or more textured semiconductor layers deposited onto the substrate. The textured layers enhance light extraction or absorption. Texturing in the region of multiple quantum wells greatly enhances internal quantum efficiency if the semiconductor is polar and the quantum wells are grown along the polar direction. Electroluminescence of LEDs of the invention is dichromatic, and results in variable color LEDs, including white LEDs, without the use of phosphor.

Moustakas, Theodore D. (Dover, MA); Cabalu, Jasper S. (Cary, NC)

2012-08-07T23:59:59.000Z

139

Optical devices featuring textured semiconductor layers  

DOE Patents (OSTI)

A semiconductor sensor, solar cell or emitter, or a precursor therefor, has a substrate and one or more textured semiconductor layers deposited onto the substrate. The textured layers enhance light extraction or absorption. Texturing in the region of multiple quantum wells greatly enhances internal quantum efficiency if the semiconductor is polar and the quantum wells are grown along the polar direction. Electroluminescence of LEDs of the invention is dichromatic, and results in variable color LEDs, including white LEDs, without the use of phosphor.

Moustakas, Theodore D. (Dover, MA); Cabalu, Jasper S. (Cary, NC)

2011-10-11T23:59:59.000Z

140

Superconducting nano-layer coating without insulator  

E-Print Network (OSTI)

The superconducting nano-layer coating without insulator layer is studied. The magnetic-field distribution and the forces acting on a vortex are derived. Using the derived forces, the vortex-penetration field and the lower critical magnetic field can be discussed. The vortex-penetration field is identical with the multilayer coating, but the lower critical magnetic field is not. Forces acting on a vortex from the boundary of two superconductors play an important role in evaluations of the free energy.

Kubo, Takayuki

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "layers uncoated acrylic" 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.


141

Graphene Layer Growth Chemistry: Five-Six-Ring Flip Reaction  

E-Print Network (OSTI)

are incorporated into growing graphene layers and hence willGRAPHENE LAYER GROWTH CHEMISTRY: FIVE-SIX-RING FLIP REACTIONon the zigzag edge of a graphene layer. A new reaction

Whitesides, R.; Domin, D.; Salomon-Ferrer, R.; Lester Jr., W.A.; Frenklach, M.

2008-01-01T23:59:59.000Z

142

Graphene Layer Growth Chemistry: Five-Six-Ring Flip Reaction  

E-Print Network (OSTI)

25-28, 2007. Topic: Soot GRAPHENE LAYER GROWTH CHEMISTRY:on the zigzag edge of a graphene layer isomerizes to reversea possibly important step in graphene layer growth, thus

Whitesides, Russell; Domin, Dominik; Lester Jr., William A.; Frenklach, Michael

2007-01-01T23:59:59.000Z

143

Lean NOx Reduction with Dual Layer LNT/SCR Catalysts  

Energy.gov (U.S. Department of Energy (DOE))

Results show that a series of dual layer catalysts with a bottom layer of LNT catalyst and a top layer of SCR catalyst can carry out coupled ammonia generation and NOx reduction, achieving high NOx conversion with minimal ammonia slip

144

Effect of a transition layer on acoustic transmission from a fluid to an elastic layer  

Science Journals Connector (OSTI)

In order for a compliant surface to be able to interact with a flow field in a constructive manner it is necessary that energy between the fluid and the compliant layer be exchanged very effectively. In this letter the fluid energy is assumed to be a plane wave traveling in the direction normal to a finite thickness elastic layer. A thin transition layer is placed at the interface between the two media.

Mauro Pierucci

1987-01-01T23:59:59.000Z

145

Organic light emitting device having multiple separate emissive layers  

DOE Patents (OSTI)

An organic light emitting device having multiple separate emissive layers is provided. Each emissive layer may define an exciton formation region, allowing exciton formation to occur across the entire emissive region. By aligning the energy levels of each emissive layer with the adjacent emissive layers, exciton formation in each layer may be improved. Devices incorporating multiple emissive layers with multiple exciton formation regions may exhibit improved performance, including internal quantum efficiencies of up to 100%.

Forrest, Stephen R. (Ann Arbor, MI)

2012-03-27T23:59:59.000Z

146

Graphene Layer Growth: Collision of Migrating Five-Member Rings  

E-Print Network (OSTI)

Monte Carlo simulations of graphene edge buildup, the rateGraphene layer growth: Collision of migrating five- memberon the zigzag edge of a graphene layer. The process is

Whitesides, Russell; Kollias, Alexander C.; Domin, Dominik; Lester Jr., William A.; Frenklach, Michael

2005-01-01T23:59:59.000Z

147

Molecular Dynamics Study of the Electrical Double Layer at Silver...  

NLE Websites -- All DOE Office Websites (Extended Search)

Electrical Double Layer at Silver Chloride Electrolyte Interfaces. Molecular Dynamics Study of the Electrical Double Layer at Silver Chloride Electrolyte Interfaces. Abstract:...

148

Effect of Gallium Nitride Template Layer Strain on the Growth...  

NLE Websites -- All DOE Office Websites (Extended Search)

5µm layer experienced tensile strain. Dynamic Secondary Ion Mass Spectrometry (SIMS) depth profiles show that the 15µm template layer device had an average indium...

149

Reduction in Fabrication Costs of Gas Diffusion Layers | Department...  

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

Layers Reduction in Fabrication Costs of Gas Diffusion Layers 2011 DOE Hydrogen and Fuel Cells Program, and Vehicle Technologies Program Annual Merit Review and Peer Evaluation...

150

Redox Chemistry in Thin Layers of Organometallic Complexes Prepared...  

NLE Websites -- All DOE Office Websites (Extended Search)

Redox Chemistry in Thin Layers of Organometallic Complexes Prepared Using Ion Soft Landing. Redox Chemistry in Thin Layers of Organometallic Complexes Prepared Using Ion Soft...

151

Vacancies Ordered in Screw Form (VOSF) and Layered Indium Selenide...  

NLE Websites -- All DOE Office Websites (Extended Search)

Form (VOSF) and Layered Indium Selenide Thin Film Deposition by Laser Back Ablation. Vacancies Ordered in Screw Form (VOSF) and Layered Indium Selenide Thin Film Deposition by...

152

Removal of Carbon Tetrachloride from a Layered Porous Medium...  

NLE Websites -- All DOE Office Websites (Extended Search)

Carbon Tetrachloride from a Layered Porous Medium by Means of Soil Vapor Extraction Enhanced by Desiccation and Water Removal of Carbon Tetrachloride from a Layered Porous Medium...

153

Removal of carbon tetrachloride from a layered porous medium...  

NLE Websites -- All DOE Office Websites (Extended Search)

carbon tetrachloride from a layered porous medium by means of soil vapor extraction enhanced by desiccation and water Removal of carbon tetrachloride from a layered porous medium...

154

ARM - Field Campaign - Boundary Layer Cloud IOP  

NLE Websites -- All DOE Office Websites (Extended Search)

govCampaignsBoundary Layer Cloud IOP govCampaignsBoundary Layer Cloud IOP Campaign Links Campaign Images Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Boundary Layer Cloud IOP 2005.07.11 - 2005.08.07 Lead Scientist : William Shaw For data sets, see below. Description Investigators from Pacific Northwest National Laboratory, in collaboration with scientists from a number of other institutions, carried out a month of intensive measurements at the ARM Climate Research Facility on the North Slope of Alaska in the summer of 2005. The purpose of these measurements was to determine how much the arctic land surface modifies the way low clouds reflect, absorb, and transmit solar and infrared radiation. This is an important problem because arctic clouds play a prominent role in

155

Viscous drag reduction in boundary layers  

SciTech Connect

The present volume discusses the development status of stability theory for laminar flow control design, applied aspects of laminar-flow technology, transition delays using compliant walls, the application of CFD to skin friction drag-reduction, active-wave control of boundary-layer transitions, and such passive turbulent-drag reduction methods as outer-layer manipulators and complex-curvature concepts. Also treated are such active turbulent drag-reduction technique applications as those pertinent to MHD flow drag reduction, as well as drag reduction in liquid boundary layers by gas injection, drag reduction by means of polymers and surfactants, drag reduction by particle addition, viscous drag reduction via surface mass injection, and interactive wall-turbulence control.

Bushnell, D.M.; Hefner, J.N.

1990-01-01T23:59:59.000Z

156

Force localization in contracting cell layers  

E-Print Network (OSTI)

Epithelial cell layers on soft elastic substrates or pillar arrays are commonly used as model systems for investigating the role of force in tissue growth, maintenance and repair. Here we show analytically that the experimentally observed localization of traction forces to the periphery of the cell layers does not necessarily imply increased local cell activity, but follows naturally from the elastic problem of a finite-sized contractile layer coupled to an elastic foundation. For homogeneous contractility, the force localization is determined by one dimensionless parameter interpolating between linear and exponential force profiles for the extreme cases of very soft and very stiff substrates, respectively. If contractility is sufficiently increased at the periphery, outward directed displacements can occur at intermediate positions, although the edge itself still retracts. We also show that anisotropic extracellular stiffness leads to force localization in the stiffer direction, as observed experimentally.

Carina M. Edwards; Ulrich S. Schwarz

2012-01-13T23:59:59.000Z

157

Layer-thickness dependence of cw photoluminescence in single a-Si:H layers  

Science Journals Connector (OSTI)

Photoluminescence data are presented for ultrathin single layers of a-Si:H deposited on a-SiO2. We observe a nonmonotonic shift of the luminescence peak with layer thickness, indicating that more than one mechanism is operative. Possible sources of the opposing shifts are discussed.

B. A. Wilson; C. M. Taylor; J. P. Harbison

1986-09-15T23:59:59.000Z

158

Coordinated Computation of Multi-layer Paths via Inter-layer PCE Communication: Standards,  

E-Print Network (OSTI)

Coordinated Computation of Multi-layer Paths via Inter-layer PCE Communication: Standards Lab, Spain Email: {xmasip, yannuzzi}@ac.upc.edu Abstract--The Path Computation Element (PCE) is positioned nowadays as one of the solutions that almost every carrier will eventually deploy. The PCE

Politècnica de Catalunya, Universitat

159

Layer-by-Layer Assembly of Clay-filled Polymer Nanocomposite Thin Films  

E-Print Network (OSTI)

A variety of functional thin films can be produced using the layer-by-layer assembly technique. In this work, assemblies of anionic clay and cationic polymer were studied with regard to film growth and gas barrier properties. A simple, yet flexible...

Jang, Woo-Sik

2010-01-14T23:59:59.000Z

160

Layer-by-layer assembly of conducting membranes for photoelectrochemical cells  

E-Print Network (OSTI)

Spray-assisted layer-by-layer (Spray-LbL) assembly is used to achieve vertical transfer of silicon microwire arrays into an ion-conducting, ultrathin polymer membrane. The choice of LbL platform and the properties of the ...

Davis, Nicole R. (Nicole Rose)

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "layers uncoated acrylic" 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

Comparison of Loss in Single-Layer and Multi-Layer Windings with a DC Component  

E-Print Network (OSTI)

depth. This can be effective, but single-layer windings can also be advantageous for high frequency. INTRODUCTION In magnetic components for modern high-frequency power converters, winding losses can be high advantages at high frequency and in some cases a single-layer winding may be better than any feasible multi

162

Atomic Layer-by-Layer Thermoelectric Conversion in Topological Insulator Bismuth/Antimony Tellurides  

E-Print Network (OSTI)

the hot carrier conduction near the Fermi energy (EF) through the band states or other localized statesAtomic Layer-by-Layer Thermoelectric Conversion in Topological Insulator Bismuth Supporting Information ABSTRACT: Material design for direct heat-to-electricity conversion with substantial

Jo, Moon-Ho

163

The Effect of Nanoparticles on the Thermal Transitions of Hydrated Layer-by-Layer Assemblies  

E-Print Network (OSTI)

Nanoparticles can have a profound effect on a polymer’s glass transition temperature (T_(g)). Many layer-by-layer (LbL) assemblies contain nanoparticles for added functionality, but the resulting effect of nanoparticles on an LbL film’s properties...

Puhr, Joseph T

2014-04-25T23:59:59.000Z

164

Photovoltaic cell with thin CS layer  

DOE Patents (OSTI)

An improved photovoltaic panel and method of forming a photovoltaic panel are disclosed for producing a high efficiency CdS/CdTe photovoltaic cell. The photovoltaic panel of the present invention is initially formed with a substantially thick Cds layer, and the effective thickness of the CdS layer is substantially reduced during regrowth to both form larger diameter CdTe crystals and substantially reduce the effective thickness of the C This invention was made with Government support under Subcontract No. ZL-7-06031-3 awarded by the Department of Energy. The Government has certain rights in this invention.

Jordan, John F. (El Paso, TX); Albright, Scot P. (El Paso, TX)

1994-01-18T23:59:59.000Z

165

Magnetic-field variance in layered superconductors  

Science Journals Connector (OSTI)

In highly anisotropic or layered high-Tc superconductors with magnetic field along the c axis, both pinning-caused and thermal fluctuations of the highly flexible vortex cores, or of chains of vortex dots, threading the cuperconducting layers may drastically reduce the variance ? of the magnetic-field fluctuation. In contrast, the fluctuations of the averaged flux lines (smoothed over the in-plane penetration depth ?) increase ?. As a consequence, muon-spin-rotation lines may be sharpened not only the thermal motional narrowing, but also by pinning-caused static disorder.

Ernst Helmut Brandt

1991-06-17T23:59:59.000Z

166

Fusion utility in the Knudsen layer  

SciTech Connect

In inertial confinement fusion, the loss of fast ions from the edge of the fusing hot-spot region reduces the reactivity below its Maxwellian value. The loss of fast ions may be pronounced because of the long mean free paths of fast ions, compared with those of thermal ions. We introduce a fusion utility function to demonstrate essential features of this Knudsen layer effect, in both magnetized and unmagnetized cases. The fusion utility concept is also used to evaluate the restoring reactivity in the Knudsen layer by manipulating fast ions in phase space using waves.

Davidovits, Seth; Fisch, Nathaniel J. [Princeton Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08544 (United States)

2014-09-15T23:59:59.000Z

167

Lattice Vibrations and Superconductivity in Layered Structures  

E-Print Network (OSTI)

PHYSICAL REVIEW B VOLUME 2, NUMBER 7 1 OCTOB ER, 1970 Lattice Vibrations and Superconductivity in Layered Structures* B. E. Allen, G. P. Alldredge, and F. W. de bette DePartment of Physics, University of Texas, Austin, Texas 78712 (Received 18... monolayers of identical particles, stacked atop one another to form a 21-layer slab. A side view of this system is shown in Fig. 1. The films alternately have atomic masses m and M, with m corresponding to the outermost films. The crys- tal structure...

Allen, Roland E.; Alldredg, GP; WETTE, FWD.

1970-01-01T23:59:59.000Z

168

Magnetism of Mn layers on Fe(100)  

Science Journals Connector (OSTI)

The magnetic state of epitaxial overlayers of Mn grown on Fe(100) is studied using spin-polarized electron energy loss spectroscopy. Nonzero exchange asymmetries are found, demonstrating that the surface layer of the Mn overlayers has a net magnetic moment. The exchange asymmetry oscillates with a period of about two atomic layers as the Mn overlayer thickness is varied, proving that the Mn forms ferromagnetic (100) sheets and that the sheets align antiferromagnetically. The average Mn exchange splitting is found to be 2.9 eV, indicating a magnetic moment of the order 3?B.

T. G. Walker and H. Hopster

1993-08-01T23:59:59.000Z

169

Cost evaluations of the protected network layer packet redundancy scheme  

Science Journals Connector (OSTI)

Feature Issue on High Availability in Optical Networks The protected network layer packet redundancy scheme...

Øverby, H

2006-01-01T23:59:59.000Z

170

Thin film solar cell including a spatially modulated intrinsic layer  

DOE Patents (OSTI)

One or more thin film solar cells in which the intrinsic layer of substantially amorphous semiconductor alloy material thereof includes at least a first band gap portion and a narrower band gap portion. The band gap of the intrinsic layer is spatially graded through a portion of the bulk thickness, said graded portion including a region removed from the intrinsic layer-dopant layer interfaces. The band gap of the intrinsic layer is always less than the band gap of the doped layers. The gradation of the intrinsic layer is effected such that the open circuit voltage and/or the fill factor of the one or plural solar cell structure is enhanced.

Guha, Subhendu (Troy, MI); Yang, Chi-Chung (Troy, MI); Ovshinsky, Stanford R. (Bloomfield Hills, MI)

1989-03-28T23:59:59.000Z

171

Back contact buffer layer for thin-film solar cells  

DOE Patents (OSTI)

A photovoltaic cell structure is disclosed that includes a buffer/passivation layer at a CdTe/Back contact interface. The buffer/passivation layer is formed from the same material that forms the n-type semiconductor active layer. In one embodiment, the buffer layer and the n-type semiconductor active layer are formed from cadmium sulfide (CdS). A method of forming a photovoltaic cell includes the step of forming the semiconductor active layers and the buffer/passivation layer within the same deposition chamber and using the same material source.

Compaan, Alvin D.; Plotnikov, Victor V.

2014-09-09T23:59:59.000Z

172

Water Uptake in PEMFC Catalyst Layers  

SciTech Connect

Water uptake profiles of proton-exchange-membrane fuel-cell catalyst layers are characterized in the form of capillary-pressure saturation (Pc-S) curves. The curves indicate that the catalyst layers tested are highly hydrophilic and require capillary pressures as low as -80 kPa to eject imbibed water. Comparison of materials made with and without Pt indicates a difference in water ejection and uptake phenomena due to the presence of Pt. The addition of Pt increases the tendency of the catalyst layer to retain water. Dynamic vapor sorption (DVS) is used to characterize the water-vapor sorption onto Nafion, Pt/C, and C surfaces. The DVS results align with the trends found from the Pc-S curves and show an increased propensity for water uptake in the presence of Pt. The effect of the ion in Nafion, sodium or protonated form, is also compared and demonstrates that although the protonation of the Nafion in the catalyst layer also increases hydrophilicity, the effect is not as great as that caused by Pt.

Gunterman, Haluna P.; Kwong, Anthony H.; Gostick, Jeffrey T.; Kusoglu, Ahmet; Weber, Adam Z.

2011-07-01T23:59:59.000Z

173

Wind Structure in the Atmospheric Boundary Layer  

Science Journals Connector (OSTI)

13 May 1971 research-article Wind Structure in the Atmospheric Boundary Layer...semi-empirical laws for the variation of mean wind speed with height and for the statistical...provide some useful ordering of the mean wind profile characteristics in relation to...

1971-01-01T23:59:59.000Z

174

Nano-soldering to single atomic layer  

DOE Patents (OSTI)

A simple technique to solder submicron sized, ohmic contacts to nanostructures has been disclosed. The technique has several advantages over standard electron beam lithography methods, which are complex, costly, and can contaminate samples. To demonstrate the soldering technique graphene, a single atomic layer of carbon, has been contacted, and low- and high-field electronic transport properties have been measured.

Girit, Caglar O. (Berkeley, CA); Zettl, Alexander K. (Kensington, CA)

2011-10-11T23:59:59.000Z

175

TURBULENCE IN SUPERSONIC AND HYPERSONIC BOUNDARY LAYERS  

E-Print Network (OSTI)

TURBULENCE IN SUPERSONIC AND HYPERSONIC BOUNDARY LAYERS Alexander J. Smits and M. Pino Martin in supersonic and hypersonic flow where the effects of compressibility have a direct influence on the turbulence. Experimental and DNS results are presented and compared. Key words: Turbulence, supersonic, hypersonic, shocks

Martín, Pino

176

Laminar boundary layers in convective heat transport  

E-Print Network (OSTI)

We study Rayleigh-Benard convection in the high-Rayleigh-number and high-Prandtl-number regime, i.e., we consider a fluid in a container that is exposed to strong heating of the bottom and cooling of the top plate in the absence of inertia effects. While the dynamics in the bulk are characterized by a chaotic convective heat flow, the boundary layers at the horizontal container plates are essentially conducting and thus the fluid is motionless. Consequently, the average temperature exhibits a linear profile in the boundary layers. In this article, we rigorously investigate the average temperature and oscillations in the boundary layer via local bounds on the temperature field. Moreover, we deduce that the temperature profile is indeed essentially linear close to the horizontal container plates. Our results are uniform in the system parameters (e.g. the Rayleigh number) up to logarithmic correction terms. An important tool in our analysis is a new Hardy-type estimate for the convecting velocity field, which can be used to control the fluid motion in the layer. The bounds on the temperature field are derived with the help of local maximal regularity estimates for convection-diffusion equations.

Christian Seis

2012-12-12T23:59:59.000Z

177

Layer-by-layer assembly of graphene and gold nanoparticles by vacuum filtration and spontaneous reduction of gold ionsw  

E-Print Network (OSTI)

Layer-by-layer assembly of graphene and gold nanoparticles by vacuum filtration and spontaneous 2009 DOI: 10.1039/b821920f Layer-by-layer films comprised of alternating graphene and gold nanoparticle graphene oxide solution to fabricate the graphene thin film on the quartz substrate, followed by gold

Kim, Yong Jung

178

Modeling the Interaction between the Atmospheric and Oceanic Boundary Layers, Including a Surface Wave Layer  

Science Journals Connector (OSTI)

The interaction between the atmospheric and oceanic boundary layers is simulated by solving a closed system of equations including equations of motion, turbulent kinetic energy (TKE), turbulent exchange coefficient (TEC), expressions for air and ...

Le Ngoc Ly

1986-08-01T23:59:59.000Z

179

Layer-by-layer Assembly of Nanobrick Wall Ultrathin Transparent Gas Barrier Films  

E-Print Network (OSTI)

Thin layers with high barrier to oxygen and other gases are a key component to many packaging applications, such as flexible electronics, food, and pharmaceuticals. Vapor deposited thin films provide significant gas barrier, but are prone...

Priolo, Morgan Alexander

2012-07-16T23:59:59.000Z

180

Method Of Transferring A Thin Crystalline Semiconductor Layer  

NLE Websites -- All DOE Office Websites (Extended Search)

Method Of Transferring A Thin Crystalline Semiconductor Layer Method Of Transferring A Thin Crystalline Semiconductor Layer Method Of Transferring A Thin Crystalline Semiconductor Layer A method for transferring a thin semiconductor layer from one substrate to another substrate involves depositing a thin epitaxial monocrystalline semiconductor layer on a substrate having surface contaminants. Available for thumbnail of Feynman Center (505) 665-9090 Email Method Of Transferring A Thin Crystalline Semiconductor Layer A method for transferring a thin semiconductor layer from one substrate to another substrate involves depositing a thin epitaxial monocrystalline semiconductor layer on a substrate having surface contaminants. An interface that includes the contaminants is formed in between the deposited layer and the substrate. Hydrogen atoms are introduced into the structure

Note: This page contains sample records for the topic "layers uncoated acrylic" 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

"Magnetically dead" surface layers on ferromagnetic semiconductors  

Science Journals Connector (OSTI)

We perform an exact model calculation for the conduction-band spin structure of ferromagnetic semiconductors. The purpose of this illustrative quasiatomic theory (which is an abstraction of our earlier general theory) is to demonstrate that the case T=0 (i.e., ferromagnetic saturation) exhibits vanishingly small spectral weights of certain quasiparticle or scattering states which, however, become manifest for T>0, and determine the electron-spin polarization. Hence T=0 results cannot be generalized to nonzero temperatures and should not be used to prove or disprove the existence of "magnetically dead" surface layers on ferromagnetic semiconductors. The existence of such dead layers has frequently been postulated to explain the electron-spin polarization in photoemission and field-emission experiments.

W. Nolting and B. Reihl

1983-10-01T23:59:59.000Z

182

HiR Thermal Testing Results  

NLE Websites -- All DOE Office Websites (Extended Search)

2 2 position specimen # specimen description (test conditions: cold side -18°C, warm side 21°C) date + time 100 mm from head TC center of glass TC 100 mm from sill TC upper IR line average lower IR line average complete IR line average left 6 triple, 2 sputtered low-e glass layers, uncoated acrylic center layer in grooved spacer (rebuilt), Kr 4/14/05 17:22 18.51 17.42 17.76 17.67 16.61 17.18 right 15 triple, 2 sputtered low-e glass layers, dense sun screen center layer, Kr 19.33 17.07 13.77 18.00 14.20 16.26 - Back to Summary - - Back to Summary - - Back to Summary - delta T line average delta T 100mm from head delta T center of glass delta T 100mm from sill ambient high ambient low ambient average six surface average

183

HiR Thermal Testing Results  

NLE Websites -- All DOE Office Websites (Extended Search)

9 9 position specimen # specimen description (test conditions: cold side -18°C, warm side 21°C) date + time 100 mm from head TC center of glass TC 100 mm from sill TC upper IR line average lower IR line average complete IR line average left 6 triple, 2 sputtered low-e glass layers, uncoated acrylic center layer in grooved spacer (rebuilt), Kr 1/31/06 16:22 17.15 15.06 16.46 15.32 13.91 14.68 right 22 triple, 2 sputtered low-e glass layers, 1/8" folded edge polycarbonate center layer, Kr 18.53 17.87 16.90 17.71 16.41 17.11 - Back to Summary - - Back to Summary - - Back to Summary - delta T line average delta T 100mm from head delta T center of glass delta T 100mm from sill ambient high ambient low ambient average six surface average

184

HiR Thermal Testing Results  

NLE Websites -- All DOE Office Websites (Extended Search)

6 6 position specimen # specimen description (test conditions: cold side -18°C, warm side 21°C) date + time 100 mm from head TC center of glass TC 100 mm from sill TC upper IR line average lower IR line average complete IR line average left 6 triple, 2 sputtered low-e glass layers, uncoated acrylic center layer in grooved spacer, Kr 3/24/05 12:40 17.51 17.52 17.63 16.30 17.03 right 9 triple, 2 sputtered low-e glass layers, 72% open insect screen center layer, Kr 17.12 13.05 17.65 13.84 15.91 - Back to Summary - - Back to Summary - - Back to Summary - delta T line average delta T 100mm from head delta T center of glass delta T 100mm from sill ambient high ambient low ambient average six surface average 1.12 0.00 0.39 4.47 21.36 20.68 21.02 20.8

185

HiR Thermal Testing Results  

NLE Websites -- All DOE Office Websites (Extended Search)

7 7 position specimen # specimen description (test conditions: cold side -18°C, warm side 21°C) date + time 100 mm from head TC center of glass TC 100 mm from sill TC upper IR line average lower IR line average complete IR line average left 6 triple, 2 sputtered low-e glass layers, uncoated acrylic center layer in grooved spacer (rebuilt), Kr 5/25/05 16:15 18.47 17.37 17.87 17.40 16.11 16.82 right 20 triple, 2 sputtered low-e glass layers, folded Lexan center layer, Kr 18.63 17.24 16.06 17.51 15.64 16.67 - Back to Summary - - Back to Summary - - Back to Summary - delta T line average delta T 100mm from head delta T center of glass delta T 100mm from sill ambient high ambient low ambient average six surface average

186

Biomimetic processing of oriented crystalline ceramic layers  

SciTech Connect

The aim of this project was to develop the capabilities for Sandia to fabricate self assembled Langmuir-Blodgett (LB) films of various materials and to exploit their two-dimensional crystalline structure to promote the growth of oriented thin films of inorganic materials at room temperature. This includes the design and synthesis of Langmuir-active (amphiphilic) organic molecules with end groups offering high nucleation potential for various ceramics. A longer range goal is that of understanding the underlying principles, making it feasible to use the techniques presented in this report to fabricate unique oriented films of various materials for electronic, sensor, and membrane applications. Therefore, whenever possible, work completed in this report was completed with the intention of addressing the fundamental phenomena underlying the growth of crystalline, inorganic films on template layers of highly organized organic molecules. This problem was inspired by biological processes, which often produce exquisitely engineered structures via templated growth on polymeric layers. Seashells, for example, exhibit great toughness owing to their fine brick-and-mortar structure that results from templated growth of calcium carbonate on top of layers of ordered organic proteins. A key goal in this work, therefore, is to demonstrate a positive correlation between the order and orientation of the template layer and that of the crystalline ceramic material grown upon it. The work completed was comprised of several parallel efforts that encompassed the entire spectrum of biomimetic growth from solution. Studies were completed on seashells and the mechanisms of growth for calcium carbonate. Studies were completed on the characterization of LB films and the capability developed for the in-house fabrication of these films. Standard films of fatty acids were studied as well as novel polypeptides and porphyrins that were synthesized.

Cesarano, J.; Shelnutt, J.A.

1997-10-01T23:59:59.000Z

187

An Accelerator Control Middle Layer Using MATLAB  

SciTech Connect

Matlab is a matrix manipulation language originally developed to be a convenient language for using the LINPACK and EISPACK libraries. What makes Matlab so appealing for accelerator physics is the combination of a matrix oriented programming language, an active workspace for system variables, powerful graphics capability, built-in math libraries, and platform independence. A number of software toolboxes for accelerators have been written in Matlab--the Accelerator Toolbox (AT) for machine simulations, LOCO for accelerator calibration, Matlab Channel Access Toolbox (MCA) for EPICS connections, and the Middle Layer. This paper will describe the ''middle layer'' software toolbox that resides between the high-level control applications and the low-level accelerator control system. This software was a collaborative effort between ALS (LBNL) and SPEAR3 (SSRL) but easily ports to other machines. Five accelerators presently use this software. The high-level Middle Layer functionality includes energy ramp, configuration control (save/restore), global orbit correction, local photon beam steering, insertion device compensation, beam-based alignment, tune correction, response matrix measurement, and script-based programs for machine physics studies.

Portmann, Gregory J.; Corbett, Jeff; Terebilo, Andrei

2005-03-15T23:59:59.000Z

188

An Accelerator Control Middle Layer Using MATLAB  

SciTech Connect

Matlab is an interpretive programming language originally developed for convenient use with the LINPACK and EISPACK libraries. Matlab is appealing for accelerator physics because it is matrix-oriented, provides an active workspace for system variables, powerful graphics capabilities, built-in math libraries, and platform independence. A number of accelerator software toolboxes have been written in Matlab -- the Accelerator Toolbox (AT) for model-based machine simulations, LOCO for on-line model calibration, and Matlab Channel Access (MCA) to connect with EPICS. The function of the MATLAB ''MiddleLayer'' is to provide a scripting language for machine simulations and on-line control, including non-EPICS based control systems. The MiddleLayer has simplified and streamlined development of high-level applications including configuration control, energy ramp, orbit correction, photon beam steering, ID compensation, beam-based alignment, tune correction and response matrix measurement. The database-driven Middle Layer software is largely machine-independent and easy to port. Six accelerators presently use the software package with more scheduled to come on line soon.

Portmann, Gregory J.; Corbett, Jeff; Terebilo, Andrei

2005-05-15T23:59:59.000Z

189

Direct Simulation of Shock Layer Plasmas  

SciTech Connect

Approximate models of the electric field used with the DSMC method all impose quasi-neutrality everywhere in the shock layer plasma. The shortcomings of these models are examined in this study by simulating a weak shock layer plasma with a coupled DSMC-Particle-In-Cell (PIC) method. The stagnation streamline of an axisymmetric shock layer is simulated for entry velocities in air that correspond to both lunar and Mars return trajectories. The atmospheric densities, particle diameters and chemical reaction rates are varied from the actual values to make the computations tractable while retaining the mean free path of air at 85 km altitude. In contrast to DSMC flow field predictions, regions of non-neutrality are predicted by the DSMC-PIC method, and the electrons are predicted to be isothermal. Perhaps the most important result of this study is that the DSMC-PIC results at both reentry energies yield a 14% increase in heat flux to the vehicle surface relative to the DSMC results. Rather unintuitively, this is mostly due to an increase in ion flux to the surface, rather than the potential energy gained by each ion as it traverses the plasma sheath. In this study, an approximate electric field model is presented, with the goal of accounting for this heat flux augmentation without the need for a computationally expensive DSMC-PIC calculation of the entire flow-field. Convective heat flux results obtained with new electric field model are compared to results from the rigorous DSMC-PIC calculations.

Farbar, E. D.; Boyd, I. D. [Dept. of Aerospace Engineering, University of Michigan, 1320 Beal Ave., Ann Arbor MI, 48109 (United States)

2011-05-20T23:59:59.000Z

190

Processes in the Magnetospheric Boundary Layer  

Science Journals Connector (OSTI)

The earth's magnetopause is a boundary that separates two distinctly different plasma regions - the (shocked) solar wind and the hot magnetospheric plasma controlled by the terrestrial magnetic field. Through this boundary a small fraction of the solar wind energy and momentum is transferred. This energy powers all major plasma processes within the magnetosphere. Thus, a proper understanding of boundary layer phenomena is of vital importance for magnetospheric plasma physics. An overview of the two main theories put forward to explain the energy and momentum transfer processes near the earth's magnetospheric boundary - magnetic merging/reconnection and the boundary layer dynamo model - will be given. The theories are compared with recent in situ plasma observations in the vicinity of the magnetopause. It is suggested here that internal processes in the magnetospheric boundary layer are decisive for the transfer of energy and momentum into the inner magnetosphere, which is coupled to the high latitude ionosphere. On the other hand, external conditions at the magnetopause proper determine the coupling to the solar wind. Means of relating transient magnetic field signatures, such as flux transfer events, with plasma dynamo induced currents will also be discussed.

Rickard Lundin

1987-01-01T23:59:59.000Z

191

Method of transferring a thin crystalline semiconductor layer  

DOE Patents (OSTI)

A method for transferring a thin semiconductor layer from one substrate to another substrate involves depositing a thin epitaxial monocrystalline semiconductor layer on a substrate having surface contaminants. An interface that includes the contaminants is formed in between the deposited layer and the substrate. Hydrogen atoms are introduced into the structure and allowed to diffuse to the interface. Afterward, the thin semiconductor layer is bonded to a second substrate and the thin layer is separated away at the interface, which results in transferring the thin epitaxial semiconductor layer from one substrate to the other substrate.

Nastasi, Michael A. (Sante Fe, NM); Shao, Lin (Los Alamos, NM); Theodore, N. David (Mesa, AZ)

2006-12-26T23:59:59.000Z

192

AutoCAD discipline layering convention. Revision 1  

SciTech Connect

This document is a user`s guide to establishing layering standards for drawing development. Uniform layering standards are established to exchange of AutoCAD datasets between organizations and companies. Consistency in the layering conventions assists the user through logical separation and identification of drawing data. This allows the user to view and plot related aspects of a drawing separately or in combination. The use of color and Linetype by layer is the preferred layering convention method, however to accommodate specific needs, colors and linetypes can also be assigned on an entity basis. New drawing setup files (also identified in AutoCAD documentation as Prototype drawings) use this layering convention to establish discipline drawing layers that are routinely used. Additions, deletions or revisions to the layering conventions are encourage.

Nielsen, B.L.

1995-05-17T23:59:59.000Z

193

Modeling nanostructured catalyst layer in PEMFC and catalyst utilization  

Science Journals Connector (OSTI)

A lattice model of the nanoscaled catalyst layer structure in proton exchange membrane fuel ... all the four components in a typical PEMFC catalyst layer: platinum (Pt), carbon, ionomer ... each average sized Pt ...

Jiejing Zhang; Pengzhen Cao; Li Xu…

2011-09-01T23:59:59.000Z

194

Peeling Back the Layers of Thin Film Structure and Chemistry  

NLE Websites -- All DOE Office Websites (Extended Search)

July 10, 2014 Bookmark and Share The layer-by-layer analysis of the concentration of strontium within a 40-angstrom thick (La, Sr)CoO thin film applied to a SiTiO3 substrate....

195

Parameter Estimation and Tracking in Physical Layer Network Coding  

E-Print Network (OSTI)

Recently, there has been a growing interest in improving the performance of the wireless relay networks through the use of Physical Layer Network Coding (PLNC) techniques. The physical layer network coding technique allows two terminals to transmit...

Jain, Manish

2012-07-16T23:59:59.000Z

196

Design and Implementation of Physical Layer Network Coding Protocols  

E-Print Network (OSTI)

There has recently been growing interest in using physical layer network coding techniques to facilitate information transfer in wireless relay networks. The physical layer network coding technique takes advantage of the additive nature of wireless...

Maduike, Dumezie K.

2010-10-12T23:59:59.000Z

197

Modern Processes of Producing Two-Layer Filtering Materials  

Science Journals Connector (OSTI)

The paper describes developments of the Powder Metallurgy Institute (National Academy of Sciences of Belarus) in the field of producing two-layer permeable structures with a filtering layer 0.3–0.4 mm in thick...

P. A. Vityaz; A. F. Ilyushchenko; V. M. Kaptsevich…

2014-01-01T23:59:59.000Z

198

Turbulent transport across shear layers in magnetically confined plasmas  

SciTech Connect

Shear layers modify the turbulence in diverse ways and do not only suppress it. A spatial-temporal investigation of gyrofluid simulations in comparison with experiments allows to identify further details of the transport process across shear layers. Blobs in and outside a shear layer merge, thereby exchange particles and heat and subsequently break up. Via this mechanism particles and heat are transported radially across shear layers. Turbulence spreading is the immanent mechanism behind this process.

Nold, B.; Ramisch, M. [Institut für Grenzflächenverfahrenstechnik und Plasmatechnologie, Universität Stuttgart, D-70569 Stuttgart (Germany); Manz, P.; Birkenmeier, G. [Physik-Department E28, Technische Universität München, James-Franck-Str.1, D-85748 Garching (Germany); Max-Planck-Institut für Plasmaphysik, Boltzmannstr. 2, D-85748 Garching (Germany); Ribeiro, T. T.; Müller, H. W.; Scott, B. D. [Max-Planck-Institut für Plasmaphysik, Boltzmannstr. 2, D-85748 Garching (Germany); Fuchert, G. [IJL, Université de Lorraine, CNRS (UMR 7198), BP 40239 Vandoeuvre-lès-Nancy (France); Stroth, U. [Max-Planck-Institut für Plasmaphysik, Boltzmannstr. 2, D-85748 Garching (Germany); Physik-Department E28, Technische Universität München, James-Franck-Str.1, D-85748 Garching (Germany)

2014-10-15T23:59:59.000Z

199

A Layered Approach to Complex Negotiations Xiaoqin Zhang  

E-Print Network (OSTI)

Honeywell Laboratories Tom.Wagner@honeywell.com May 17, 2004 Abstract In this paper, we present a layered

Zhang, Xiaoqin

200

Plasma atomic layer etching using conventional plasma equipment Ankur Agarwala  

E-Print Network (OSTI)

Plasma atomic layer etching using conventional plasma equipment Ankur Agarwala Department plasma etching processes having atomic layer resolution. The basis of plasma atomic layer etching PALE will be discussed with the goal of demonstrating the potential of using conventional plasma etching equipment having

Kushner, Mark

Note: This page contains sample records for the topic "layers uncoated acrylic" 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.


201

Model of Trace Gas Flux in Boundary Layer  

E-Print Network (OSTI)

Mathematical model of the turbulent flux in the three-layer boundary system is presented. Turbulence is described as a presence of the nonzero vorticity. Generalized advection-diffusion-reaction equation is derived for arbitrary number components in the flux. The fluxes in the layers are objects for matching requirements on the boundaries between the layers.

I. I. Vasenev; I. S. Nurgaliev

2013-03-04T23:59:59.000Z

202

Boundary layer response to wind gusts  

E-Print Network (OSTI)

of the wind tunnel sir stress caused by tbe addition of the in)actors, the decision was osde to use flew visuslstion ?echniques to detsreine if it wss possible to generate s lsuinar boundary layer on the flat plate. Loup black wss suspended in light..., 8. The data reduction procedure used in this thesis follcwed pxi- maxily the procsduxes of rafax'ence 8. Velocity fluctuations were detected using the constant current technique and computed based on square wave calibration. yor the constant...

Morland, Bruce Thomas

1968-01-01T23:59:59.000Z

203

Layer-by-Layer Assembly of Sintered CdSexTe1–x Nanocrystal Solar Cells  

Science Journals Connector (OSTI)

solar cell; nanocrystal; CdTe; CdSexTe1?x; layer-by-layer; solution-processed; sintered ... For instance, devices fabricated using cadmium telluride (CdTe) and copper indium gallium selenide (CIGS) based active layers have exhibited laboratory scale power conversion efficiencies up to 17.3%(1) and 20.3%,(2) respectively, at commercial production costs as low as US $0.75/Watt. ... (20) More recently, the graded device concept has been extended to solution-processed organic solar cells, through a series of complementary donor materials(21) and to PbS quantum dot devices, where bandgap grading was accomplished through variation of the QD diameter. ...

Brandon I. MacDonald; Alessandro Martucci; Sergey Rubanov; Scott E. Watkins; Paul Mulvaney; Jacek J. Jasieniak

2012-06-12T23:59:59.000Z

204

Scalable Manufacture of Built-to-Order Nanomedicine: Spray-Assisted Layer-by-Layer Functionalization of PRINT Nanoparticles  

E-Print Network (OSTI)

Scalable methods, PRINT particle fabrication, and spray-assisted Layer-by-Layer deposition are combined to generate uniform and functional nanotechnologies with precise control over composition, size, shape, and surface ...

Herlihy, Kevin P.

205

Layer-by-layer assembled carbon nanotube nanostructures for high-power and high-energy lithium storage  

E-Print Network (OSTI)

The layer-by-layer (LbL) electrostatic assembly technique is utilized to incorporate positively- and negatively-charged electroactive species in self-assembled electrodes that are binder- and additive- free. This work first ...

Gallant, Betar M. (Betar Maurkah)

2010-01-01T23:59:59.000Z

206

Adsorption, Penetration, and Uncoating of Murine Leukemia Virus Studied by Using Its Reverse Transcriptase  

Science Journals Connector (OSTI)

...from the National Council for Research and Development, Israel, and the KFA Julich, GSF Munchen, GFK Karlsruhe, and GKSS Geesthacht-tesperhude, Germany. LITERATURE CITED 1. Aboud, M., R. Shoor, and S. Salzberg. 1978. Effect of interferon on...

Mordechai Aboud; Ruth Shoor; Samuel Salzberg

1979-04-01T23:59:59.000Z

207

Structural and Functional Analysis of Coxsackievirus A9 Integrin ?v?6 Binding and Uncoating  

Science Journals Connector (OSTI)

...which binds to the bent alpha2beta1 integrin...D Stuart. 1999. The crystal structure of coxsackievirus...integrins by conversion from bent to extended conformations...and MA Arnaout. 2002. Crystal structure of the extracellular...method for identifying spherical particles in electron...

Shabih Shakeel; Jani J. T. Seitsonen; Tommi Kajander; Pasi Laurinmäki; Timo Hyypiä; Petri Susi; Sarah J. Butcher

2013-01-30T23:59:59.000Z

208

Thin layer chromatography residue applicator sampler  

DOE Patents (OSTI)

A thin layer chromatograph residue applicator sampler. The residue applicator sampler provides for rapid analysis of samples containing high explosives, chemical warfare, and other analyses of interest under field conditions. This satisfied the need for a field-deployable, small, hand-held, all-in-one device for efficient sampling, sample dissolution, and sample application to an analytical technique. The residue applicator sampler includes a sampling sponge that is resistant to most chemicals and is fastened via a plastic handle in a hermetically sealed tube containing a known amount of solvent. Upon use, the wetted sponge is removed from the sealed tube and used as a swiping device across an environmental sample. The sponge is then replaced in the hermetically sealed tube where the sample remains contained and dissolved in the solvent. A small pipette tip is removably contained in the hermetically sealed tube. The sponge is removed and placed into the pipette tip where a squeezing-out of the dissolved sample from the sponge into the pipette tip results in a droplet captured in a vial for later instrumental analysis, or applied directly to a thin layer chromatography plate for immediate analysis.

Nunes, Peter J. (Danville, CA); Kelly, Fredrick R. (Modesto, CA); Haas, Jeffrey S. (San Ramon, CA); Andresen, Brian D. (Livermore, CA)

2007-07-24T23:59:59.000Z

209

Similarity Equations for Wind and Temperature Profiles in the Radix Layer, at the Bottom of the Convective Boundary Layer  

Science Journals Connector (OSTI)

In the middle of the convective boundary layer, also known as the mixed layer, is a relatively thick region where wind speed and potential temperature are nearly uniform with height. Below this uniform layer (UL), wind speed decreases to zero at ...

Edi Santoso; Roland Stull

2001-06-01T23:59:59.000Z

210

Buffer layers for REBCO films for use in superconducting devices  

SciTech Connect

A superconducting article includes a substrate having a biaxially textured surface. A biaxially textured buffer layer, which can be a cap layer, is supported by the substrate. The buffer layer includes a double perovskite of the formula A.sub.2B'B''O.sub.6, where A is rare earth or alkaline earth metal and B' and B'' are different transition metal cations. A biaxially textured superconductor layer is deposited so as to be supported by the buffer layer. A method of making a superconducting article is also disclosed.

Goyal, Amit; Wee, Sung-Hun

2014-06-10T23:59:59.000Z

211

Mass transfer model for two-layer TBP oxidation reactions  

SciTech Connect

To prove that two-layer, TBP-nitric acid mixtures can be safely stored in the canyon evaporators, it must be demonstrated that a runaway reaction between TBP and nitric acid will not occur. Previous bench-scale experiments showed that, at typical evaporator temperatures, this reaction is endothermic and therefore cannot run away, due to the loss of heat from evaporation of water in the organic layer. However, the reaction would be exothermic and could run away if the small amount of water in the organic layer evaporates before the nitric acid in this layer is consumed by the reaction. Provided that there is enough water in the aqueous layer, this would occur if the organic layer is sufficiently thick so that the rate of loss of water by evaporation exceeds the rate of replenishment due to mixing with the aqueous layer. This report presents measurements of mass transfer rates for the mixing of water and butanol in two-layer, TBP-aqueous mixtures, where the top layer is primarily TBP and the bottom layer is comprised of water or aqueous salt solution. Mass transfer coefficients are derived for use in the modeling of two-layer TBP-nitric acid oxidation experiments. Three cases were investigated: (1) transfer of water into the TBP layer with sparging of both the aqueous and TBP layers, (2) transfer of water into the TBP layer with sparging of just the TBP layer, and (3) transfer of butanol into the aqueous layer with sparging of both layers. The TBP layer was comprised of 99% pure TBP (spiked with butanol for the butanol transfer experiments), and the aqueous layer was comprised of either water or an aluminum nitrate solution. The liquid layers were air sparged to simulate the mixing due to the evolution of gases generated by oxidation reactions. A plastic tube and a glass frit sparger were used to provide different size bubbles. Rates of mass transfer were measured using infrared spectrophotometers provided by SRTC/Analytical Development.

Laurinat, J.E.

1994-09-28T23:59:59.000Z

212

HiR Thermal Testing Results  

NLE Websites -- All DOE Office Websites (Extended Search)

6 6 position specimen # specimen description (test conditions: cold side -18°C, warm side 21°C) date + time 100 mm from head TC center of glass TC 100 mm from sill TC upper IR line average lower IR line average complete IR line average left 6 triple, 2 sputtered low-e glass layers, uncoated acrylic center layer in grooved spacer (rebuilt), Kr 5/20/05 18:05 18.33 16.96 17.89 17.27 16.04 16.71 right 19 double, 1 sputtered low-e glass layer, 3/8" gap, Kr 15.73 15.53 14.97 14.51 13.65 14.13 - Back to Summary - - Back to Summary - - Back to Summary - delta T line average delta T 100mm from head delta T center of glass delta T 100mm from sill ambient high ambient low ambient average six surface average 2.59 2.60 1.43 2.92 21.54 20.61 21.08 20.85

213

ARM - Field Campaign - Lower Atmospheric Boundary Layer Experiment  

NLE Websites -- All DOE Office Websites (Extended Search)

govCampaignsLower Atmospheric Boundary Layer Experiment govCampaignsLower Atmospheric Boundary Layer Experiment Campaign Links LABLE Website Related Campaigns 2013 Lower Atmospheric Boundary Layer Experiment 2013.05.28, Turner, SGP Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Lower Atmospheric Boundary Layer Experiment 2012.09.17 - 2012.11.13 Lead Scientist : David Turner Description Boundary layer turbulence is an important process that is parameterized in most atmospheric numerical models. Turbulence redistributes energy and mass within the boundary layer. Many different characteristics can impact the character of turbulence in the boundary layer, including different surface types, horizontal wind speed and direction, and the vertical temperature structure of the atmosphere. However, there have been few studies that have

214

Organic photovoltaic cell incorporating electron conducting exciton blocking layers  

DOE Patents (OSTI)

The present disclosure relates to photosensitive optoelectronic devices including a compound blocking layer located between an acceptor material and a cathode, the compound blocking layer including: at least one electron conducting material, and at least one wide-gap electron conducting exciton blocking layer. For example, 3,4,9,10 perylenetetracarboxylic bisbenzimidazole (PTCBI) and 1,4,5,8-napthalene-tetracarboxylic-dianhydride (NTCDA) function as electron conducting and exciton blocking layers when interposed between the acceptor layer and cathode. Both materials serve as efficient electron conductors, leading to a fill factor as high as 0.70. By using an NTCDA/PTCBI compound blocking layer structure increased power conversion efficiency is achieved, compared to an analogous device using a conventional blocking layers shown to conduct electrons via damage-induced midgap states.

Forrest, Stephen R.; Lassiter, Brian E.

2014-08-26T23:59:59.000Z

215

Role of build orientation in layered manufacturing: a review  

Science Journals Connector (OSTI)

Layered manufacturing, also called rapid prototyping or additive manufacturing is a revolutionary development in the field of manufacturing processes in last two decades. Unlike material removed from a stock in the machining process, layered manufacturing builds the solid volume from a CAD model by successively adding material layer by layer. Since parts are fabricated layer by layer, build orientation plays a critical role in the layered manufacturing process as it can improve part quality in terms of accuracy and surface finish, reduce the support volume required, support contact area and build time. It also affects the part strength and cost of manufacturing. This paper presents review of various strategies developed to decide the optimum part build orientation based on different criteria and related issues. This paper also discusses the effect of build orientation on fabricated parts and future directions to improve part quality by selecting suitable and feasible build orientation.

Mohammad Taufik; Prashant K. Jain

2013-01-01T23:59:59.000Z

216

Combining multi-layered bitmap files using network specific hardware  

DOE Patents (OSTI)

Images and video can be produced by compositing or alpha blending a group of image layers or video layers. Increasing resolution or the number of layers results in increased computational demands. As such, the available computational resources limit the images and videos that can be produced. A computational architecture in which the image layers are packetized and streamed through processors can be easily scaled so to handle many image layers and high resolutions. The image layers are packetized to produce packet streams. The packets in the streams are received, placed in queues, and processed. For alpha blending, ingress queues receive the packetized image layers which are then z sorted and sent to egress queues. The egress queue packets are alpha blended to produce an output image or video.

DuBois, David H. (Los Alamos, NM); DuBois, Andrew J. (Santa Fe, NM); Davenport, Carolyn Connor (Los Alamos, NM)

2012-02-28T23:59:59.000Z

217

Effects of Membrane- and Catalyst-layer-thickness Nonuniformities in Polymer-electrolyte Fuel Cells  

E-Print Network (OSTI)

thicknesses for the membrane and catalyst layer. Figure 2.of dry membrane (a) and catalyst-layer (b) thickness (andhollow symbols) and catalyst-layer (filled symbols)

Weber, Adam Z.; Newman, John

2006-01-01T23:59:59.000Z

218

Numerical Study of Freestream Waves Receptivity and Nonlinear Breakdown in Hypersonic Boundary Layer  

E-Print Network (OSTI)

Numerical Methods for Hypersonic Boundary Layer Stability.of Instability in a Hypersonic Boundary Layer. TheoreticalA. P. , Receptivity of Hypersonic Boundary Layer to Wall

Lei, Jia

2013-01-01T23:59:59.000Z

219

Carbides composite surface layers produced by (PTA)  

SciTech Connect

The plasma transferred arc technique was applied to deposit a composite layer of nickel base with tungsten carbide in powder form on to surface of low alloy steel 18G2A type according to polish standard. Results showed that, plasma transferred arc hard facing process was successfully conducted by using Deloro alloy 22 plus tungsten carbide powders. Maximum hardness of 1489 HV and minimum dilution of 8.4 % were achieved by using an arc current of 60 A. However, when the current was further increased to 120 A and the dilution increases with current increase while the hardness decreases. Microstructure of the nickel base deposit with tungsten carbide features uniform distribution of reinforcement particles with regular grain shape half - dissolved in the matrix.

Tajoure, Meloud, E-mail: Tajoore2000@yahoo.com [MechanicalEng.,HIHM,Gharian (Libya); Tajouri, Ali, E-mail: Tajouri-am@yahoo.com, E-mail: dr.mokhtarphd@yahoo.com; Abuzriba, Mokhtar, E-mail: Tajouri-am@yahoo.com, E-mail: dr.mokhtarphd@yahoo.com [Materials and Metallurgical Eng., UOT, Tripoli (Libya); Akreem, Mosbah, E-mail: makreem@yahoo.com [Industrial Research Centre,Tripoli (Libya)

2013-12-16T23:59:59.000Z

220

Hand portable thin-layer chromatography system  

DOE Patents (OSTI)

A hand portable, field-deployable thin-layer chromatography (TLC) unit and a hand portable, battery-operated unit for development, illumination, and data acquisition of the TLC plates contain many miniaturized features that permit a large number of samples to be processed efficiently. The TLC unit includes a solvent tank, a holder for TLC plates, and a variety of tool chambers for storing TLC plates, solvent, and pipettes. After processing in the TLC unit, a TLC plate is positioned in a collapsible illumination box, where the box and a CCD camera are optically aligned for optimal pixel resolution of the CCD images of the TLC plate. The TLC system includes an improved development chamber for chemical development of TLC plates that prevents solvent overflow.

Haas, Jeffrey S. (San Ramon, CA); Kelly, Fredrick R. (Modesto, CA); Bushman, John F. (Oakley, CA); Wiefel, Michael H. (La Honda, CA); Jensen, Wayne A. (Livermore, CA)

2000-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "layers uncoated acrylic" 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

Layered electrodes for lithium cells and batteries  

DOE Patents (OSTI)

Lithium metal oxide compounds of nominal formula Li.sub.2MO.sub.2, in which M represents two or more positively charged metal ions, selected predominantly and preferably from the first row of transition metals are disclosed herein. The Li.sub.2MO.sub.2 compounds have a layered-type structure, which can be used as positive electrodes for lithium electrochemical cells, or as a precursor for the in-situ electrochemical fabrication of LiMO.sub.2 electrodes. The Li.sub.2MO.sub.2 compounds of the invention may have additional functions in lithium cells, for example, as end-of-discharge indicators, or as negative electrodes for lithium cells.

Johnson, Christopher S. (Naperville, IL); Thackeray, Michael M. (Naperville, IL); Vaughey, John T. (Elmhurst, IL); Kahaian, Arthur J. (Chicago, IL); Kim, Jeom-Soo (Naperville, IL)

2008-04-15T23:59:59.000Z

222

Cleaning graphene with a titanium sacrificial layer  

SciTech Connect

Graphene is a promising material for future electronic applications and chemical vapor deposition of graphene on copper is a promising method for synthesizing graphene on the wafer scale. The processing of such graphene films into electronic devices introduces a variety of contaminants which can be difficult to remove. An approach to cleaning residues from the graphene channel is presented in which a thin layer of titanium is deposited via thermal e-beam evaporation and immediately removed. This procedure does not damage the graphene as evidenced by Raman spectroscopy, greatly enhances the electrical performance of the fabricated graphene field effect transistors, and completely removes the chemical residues from the surface of the graphene channel as evidenced by x-ray photoelectron spectroscopy.

Joiner, C. A., E-mail: cjoiner3@gatech.edu; Roy, T.; Hesabi, Z. R.; Vogel, E. M. [School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332 (United States); Chakrabarti, B. [School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332 (United States); Department of Materials Science and Engineering, The University of Texas at Dallas, Richardson, Texas 75080 (United States)

2014-06-02T23:59:59.000Z

223

Model for reflectance anisotropy spectra of molecular layered systems  

Science Journals Connector (OSTI)

We present a theoretical study based on the local field interaction for the reflectance anisotropy spectra of organic molecular layers. Each layer is formed by an ordered two-dimensional array of polarizable organic molecules that respond to the local electric field like point-like harmonic oscillators. We concentrate on the morphological characteristics of the layers and its effect on the spectra, showing that the reorientation of the molecules from layer to layer, as the system is assembled, gives rise to a line shape of the spectra that goes from peak-like to derivative-like. Our spectra shows good qualitative agreement with experimental results of a layered system of metalloporphyrin octaesters molecules deposited onto an isotropic gold substrate by the Langmuir-Schaefer technique.

Bernardo S. Mendoza and R. A. Vázquez-Nava

2005-07-05T23:59:59.000Z

224

Direct atomic-scale observation of layer-by-layer oxide growth during magnesium oxidation  

SciTech Connect

The atomic-scale oxide growth dynamics are directly revealed by in situ high resolution transmission electron microscopy during the oxidation of Mg surface. The oxidation process is characterized by the layer-by-layer growth of magnesium oxide (MgO) nanocrystal via the adatom process. Consistently, the nucleated MgO crystals exhibit faceted surface morphology as enclosed by (200) lattice planes. It is believed that the relatively lower surface energies of (200) lattice planes should play important roles, governing the growth mechanism. These results facilitate the understanding of the nanoscale oxide growth mechanism that will have an important impact on the development of magnesium or magnesium alloys with improved resistance to oxidation.

Zheng, He; Wu, Shujing; Sheng, Huaping; Liu, Chun; Liu, Yu; Cao, Fan; Zhou, Zhichao; Zhao, Dongshan, E-mail: wang@whu.edu.cn, E-mail: dszhao@whu.edu.cn; Wang, Jianbo, E-mail: wang@whu.edu.cn, E-mail: dszhao@whu.edu.cn [School of Physics and Technology, Center for Electron Microscopy and MOE Key Laboratory of Artificial Micro- and Nano-structures, Wuhan University, Wuhan 430072 (China); Zhao, Xingzhong [School of Physics and Technology, Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education, Wuhan University, Wuhan 430072 (China)

2014-04-07T23:59:59.000Z

225

Encapsulation methods and dielectric layers for organic electrical devices  

DOE Patents (OSTI)

The disclosure provides methods and materials suitable for use as encapsulation barriers and dielectric layers in electronic devices. In one embodiment, for example, there is provided an electroluminescent device or other electronic device with a dielectric layer comprising alternating layers of a silicon-containing bonding material and a ceramic material. The methods provide, for example, electronic devices with increased stability and shelf-life. The invention is useful, for example, in the field of microelectronic devices.

Blum, Yigal D; Chu, William Siu-Keung; MacQueen, David Brent; Shi, Yijan

2013-07-02T23:59:59.000Z

226

Augmentation of acoustic transmission by a transition layer  

Science Journals Connector (OSTI)

It has already been reported by the author at a previous meeting [J. Acoust. Soc. Am. Suppl. 73 S95 (1982)] that certain types of transition layers can improve the transmission of acoustic waves from one medium to another. In this paper conditions under which the transmissions of an acoustic wave is enhanced by the transition layer are presented. The case of a finite thickness elastic layer has been studied and it has been determined that at certain key frequencies an optimum transition layer thickness exists which greatly improves the interaction between the two media.

Mauro Pierucci

1985-01-01T23:59:59.000Z

227

Characterization of metal oxide layers grown on CVD graphene  

SciTech Connect

Growth of a fully oxidized aluminum oxide layer with low surface roughness on graphene grown by chemical vapor deposition is demonstrated. This is accomplished by the deposition of a 0.2 nm thick titanium seed layer on the graphene prior to the deposition of the aluminum under ultra high vacuum conditions, which was subsequently oxidized. The stoichiometry and surface roughness of the oxide layers were measured for a range of titanium and aluminum depositions utilizing ex situ x-ray photoelectron spectrometry and atomic force microscopy. These fully oxidized films are expected to produce good dielectric layers for use in graphene based electronic devices.

Matsubayashi, Akitomo; Abel, Joseph; Prasad Sinha, Dhiraj; Lee, Ji Ung; LaBella, Vincent P. [College of Nanoscale Science and Engineering, University at Albany, SUNY, Albany, New York 12203 (United States)

2013-03-15T23:59:59.000Z

228

Nepheloid layer distribution in the Benguela upwelling area offshore Namibia.  

E-Print Network (OSTI)

at the shelf break feeds a major intermediate nepheloid layer (INL) at 25.51S. This INL is positioned at 250

Mohrholz, Volker

229

Poroelastic Backus averaging for anisotropic layered fluid- and gas ...  

E-Print Network (OSTI)

medium consisting of a stack of vertically fractured hori- zontal layers, this ...... Smith, 1982; Gibson and Toks öz, 1990; Gelinsky and Shapiro,. 1996; Carcione ...

S. Gelinsky, S. A. Shapiro

1997-11-26T23:59:59.000Z

230

Structural Characterization of the Active Layer in Organic Solar Cells.  

E-Print Network (OSTI)

??Organic solar cells belong to a class of devices where the morphology of the active layer has a large impact on device performance. However, characterization… (more)

Kozub, Derek

2011-01-01T23:59:59.000Z

231

Local environment and composition of magnesium gallium layered...  

NLE Websites -- All DOE Office Websites (Extended Search)

Local environment and composition of magnesium gallium layered double hydroxides determined from solid-state 1H and 71Ga NMR Local environment and composition of magnesium gallium...

232

Ultrafast THz Studies of Few-Layer Epitaxial Graphene  

Science Journals Connector (OSTI)

We report the broadband optical conductivity and ultrafast THz dynamics of few-layer epitaxial graphene, revealing electrodynamics consistent with a dense Dirac electron plasma and a...

Choi, Hyunyong; Borondics, Ferenc; Siegel, David A; Zhou, Shuyun; Martin, Michael C; Lanzara, Alessandra; Kaindl, Robert A

233

Performance and Safety of Olivines and Layered Oxides | Department...  

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

More Documents & Publications Studies on Oxide Cathode Crystals Phase Behavior and Solid State Chemistry in Olivines Olivines and Substituted Layered Materials...

234

Evaluate Si Layers: Cooperative Research and Development Final Report, CRADA Number CRD-07-255  

SciTech Connect

Evaluate Si layers based on heteroepitaxial Si growth on RABITS textured metal substrates coated with textured buffer layers.

Teplin, C.

2013-04-01T23:59:59.000Z

235

Photovoltaic Cell Having A P-Type Polycrystalline Layer With Large Crystals  

DOE Patents (OSTI)

A photovoltaic cell has an n-type polycrystalline layer and a p-type polycrystalline layer adjoining the n-type polycrystalline layer to form a photovoltaic junction. The p-type polycrystalline layer comprises a substantially planar layer portion having relatively large crystals adjoining the n-type polycrystalline layer. The planar layer portion includes oxidized impurities which contribute to obtainment of p-type electrical properties in the planar layer portion.

Albright, Scot P. (Lakewood, CO); Chamberlin, Rhodes R. (El Paso, TX)

1996-03-26T23:59:59.000Z

236

Method of fabricating a solar cell with a tunnel dielectric layer  

DOE Patents (OSTI)

Methods of fabricating solar cells with tunnel dielectric layers are described. Solar cells with tunnel dielectric layers are also described.

Dennis, Tim; Harrington, Scott; Manning, Jane; Smith, David; Waldhauer, Ann

2012-12-18T23:59:59.000Z

237

Method of fabricating a solar cell with a tunnel dielectric layer  

DOE Patents (OSTI)

Methods of fabricating solar cells with tunnel dielectric layers are described. Solar cells with tunnel dielectric layers are also described.

Dennis, Tim; Harrington, Scott; Manning, Jane; Smith, David D; Waldhauer, Ann

2014-04-29T23:59:59.000Z

238

Fermi level de-pinning of aluminium contacts to n-type germanium using thin atomic layer deposited layers  

SciTech Connect

Fermi-level pinning of aluminium on n-type germanium (n-Ge) was reduced by insertion of a thin interfacial dielectric by atomic layer deposition. The barrier height for aluminium contacts on n-Ge was reduced from 0.7?eV to a value of 0.28?eV for a thin Al{sub 2}O{sub 3} interfacial layer (?2.8?nm). For diodes with an Al{sub 2}O{sub 3} interfacial layer, the contact resistance started to increase for layer thicknesses above 2.8?nm. For diodes with a HfO{sub 2} interfacial layer, the barrier height was also reduced but the contact resistance increased dramatically for layer thicknesses above 1.5?nm.

Gajula, D. R., E-mail: dgajula01@qub.ac.uk; Baine, P.; Armstrong, B. M.; McNeill, D. W. [School of Electronics, Electrical Engineering and Computer Science, Queen's University Belfast, Ashby Building, Stranmillis Road, Belfast BT9 5AH (United Kingdom)] [School of Electronics, Electrical Engineering and Computer Science, Queen's University Belfast, Ashby Building, Stranmillis Road, Belfast BT9 5AH (United Kingdom); Modreanu, M.; Hurley, P. K. [Tyndall National Institute, University College Cork, Lee Maltings, Cork (Ireland)] [Tyndall National Institute, University College Cork, Lee Maltings, Cork (Ireland)

2014-01-06T23:59:59.000Z

239

Melanin as an active layer in biosensors  

SciTech Connect

The development of pH sensors is of great interest due to its extensive application in several areas such as industrial processes, biochemistry and particularly medical diagnostics. In this study, the pH sensing properties of an extended gate field effect transistor (EGFET) based on melanin thin films as active layer are investigated and the physical mechanisms related to the device operation are discussed. Thin films were produced from different melanin precursors on indium tin oxide (ITO) and gold substrates and were investigated by Atomic Force Microscopy and Electrochemical Impedance Spectroscopy. Experiments were performed in the pH range from 2 to 12. EGFETs with melanin deposited on ITO and on gold substrates showed sensitivities ranging from 31.3 mV/pH to 48.9 mV/pH, depending on the melanin precursor and the substrate used. The pH detection is associated with specific binding sites in its structure, hydroxyl groups and quinone imine.

Piacenti da Silva, Marina, E-mail: marinaness@yahoo.com; Congiu, Mirko, E-mail: congiumat@gmail.com; Oliveira Graeff, Carlos Frederico de, E-mail: graeff@fc.unesp.br [Department of Physics, Faculty of Sciences - UNESP, Bauru, SP (Brazil); Fernandes, Jéssica Colnaghi, E-mail: jeziga-cf@yahoo.com.br; Biziak de Figueiredo, Natália, E-mail: natbiziak@yahoo.com.br; Mulato, Marcelo, E-mail: mmulato@ffclrp.usp.br [Department of Physics, Faculty of Philosophy, Science and Letters at Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP (Brazil)] [Department of Physics, Faculty of Philosophy, Science and Letters at Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP (Brazil)

2014-03-15T23:59:59.000Z

240

Order Preserving and Shape Prior Constrained Intra-Retinal Layer Segmentation in Optical  

E-Print Network (OSTI)

the dataset we used for evaluation and reports empirical results. We conclude in Sect. 5. Fig. 1. An OCT B are: nerve fiber layer (NFL), ganglion cell layer and inner plexiform layer (GCL + IPL), inner nuclear layer (INL), outer plexiform layer (OPL), outer nuclear layer and inner segment (ONL + IS), con- necting

Heermann, Dieter W.

Note: This page contains sample records for the topic "layers uncoated acrylic" 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

NMR of Layered Silicates in Argonne Coals and Geochemical Implications  

Science Journals Connector (OSTI)

NMR of Layered Silicates in Argonne Coals and Geochemical Implications ... Chemistry Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439 ... High-resolution 27Al and 29Si NMR were employed to characterize layered silicates in the suite of eight Argonne Premium coals. ...

A. R. Thompson; R. E. Botto

2000-12-13T23:59:59.000Z

242

Layer architectures and regulation in telecommunications Andrew Odlyzko  

E-Print Network (OSTI)

Layer architectures and regulation in telecommunications Andrew Odlyzko Digital Technology Center A layered policy model for regulation of telecommunications, as proposed by Kevin Werbach [Werbach] and Rick Whitt [Whitt], has many attractions. The telecommunications industry used to consist of a collection

Minnesota, University of

243

SINGLE AND DUAL LAYER THIN FILM BULGE TESTING  

E-Print Network (OSTI)

film windows that are used in Next Generation Lithography masks and certain MEMS devices. The bulge testing method measures the mechanical properties of a thin film by isolating it in a thin film window of the system. Figure 6 Dual Layer Thin Film Membrane Window For a dual layer membrane the effective total

Huston, Dryver R.

244

Layered Binary-Dielectrics for Energy Applications: Limitations and Potentials  

SciTech Connect

In this Letter, an attempt is made to illustrate how performance of an electrically insulating material, a dielectric, can be improved by constructing a layered binary-dielectric structure that employs a weak insulator with high dielectric permittivity. It is shown that layered binary-dielectrics could have a signicant impact on energy storage and electrical insulation.

Tuncer, Enis [ORNL

2012-01-01T23:59:59.000Z

245

OPTIMIZATION OF LAYER DENSITIES FOR MULTILAYERED INSULATION SYSTEMS  

SciTech Connect

Numerous tests of various multilayer insulation systems have indicated that there are optimal densities for these systems. However, the only method of calculating this optimal density was by a complex physics based algorithm developed by McIntosh. In the 1970's much data were collected on the performance of these insulation systems with many different variables analyzed. All formulas generated included number of layers and layer density as geometric variables in solving for the heat flux, none of them was in a differentiable form for a single geometric variable. It was recently discovered that by converting the equations from heat flux to thermal conductivity using Fourier's Law, the equations became functions of layer density, temperatures, and material properties only. The thickness and number of layers of the blanket were merged into a layer density. These equations were then differentiated with respect to layer density. By setting the first derivative equal to zero, and solving for the layer density, the critical layer density was determined. This method was checked and validated using test data from the Multipurpose Hydrogen Testbed which was designed using Mcintosh's algorithm.

Johnson, W. L. [NASA Kennedy Space Center, KT-E Kennedy Space Center, FL 32899 (United States)

2010-04-09T23:59:59.000Z

246

Delamination resistance of thermal barrier coatings containing embedded ductile layers  

E-Print Network (OSTI)

-tempera- ture exposure to oxygen, and an outer low thermal conduc- tivity ceramic coating, such as ytrriaDelamination resistance of thermal barrier coatings containing embedded ductile layers Matthew R layers upon thermal cycling delamination failure of thermal barrier coatings (TBCs) driven by thickening

Wadley, Haydn

247

Dopaminergic Amacrine Cells in the Inner Nuclear Layer and Ganglion  

E-Print Network (OSTI)

both in the inner nuclear layer (INL) and in the ganglion cell layer (GCL) to determine whether 27% are located in the GCL, and the rest in the INL. Based on analysis of their Voronoi domains that the distribution of INL cells was statistically regular, while that of the GCL cells was not. However, by using

Eglen, Stephen

248

Turbulence Structure and Wall Signature in Hypersonic Turbulent Boundary Layer  

E-Print Network (OSTI)

Turbulence Structure and Wall Signature in Hypersonic Turbulent Boundary Layer Yin-Chiu Kan , Clara and hypersonic turbulent boundary layer datasets from direct numerical simulation (DNS). Contour plots and Marusic5 and Mathis, Hutchins and Marusic16 ). In contrast to supersonic and hypersonic flow regimes

Martín, Pino

249

Physics of neutron star surface layers and their thermal radiation  

E-Print Network (OSTI)

Physics of neutron star surface layers and their thermal radiation Alexander Y. Potekhin Ioffe review the physical properties of neutron star surface layers, important for the stellar thermal radiation, taking into consideration the effects of strong magnetic fields. Keywords: Neutron stars

250

Current isolating epitaxial buffer layers for high voltage photodiode array  

DOE Patents (OSTI)

An array of photodiodes in series on a common semi-insulating substrate has a non-conductive buffer layer between the photodiodes and the semi-insulating substrate. The buffer layer reduces current injection leakage between the photodiodes of the array and allows optical energy to be converted to high voltage electrical energy.

Morse, Jeffrey D. (Martinez, CA); Cooper, Gregory A. (Pleasant Hill, CA)

2002-01-01T23:59:59.000Z

251

Superlattice doped layers for amorphous silicon photovoltaic cells  

DOE Patents (OSTI)

Superlattice doped layers for amorphous silicon photovoltaic cells comprise a plurality of first and second lattices of amorphous silicon alternatingly formed on one another. Each of the first lattices has a first optical bandgap and each of the second lattices has a second optical bandgap different from the first optical bandgap. A method of fabricating the superlattice doped layers also is disclosed.

Arya, Rajeewa R. (Doylestown, PA)

1988-01-12T23:59:59.000Z

252

Numerical Simulation of the Wave Bottom Boundary Layer  

E-Print Network (OSTI)

are coupled to the wave cycle; phases of accelerating ow organize the boundary layer structure, decelerating; Zhao and Anastasiou, 1993; Feddersen and Guza, 2000; and Rankin and Hires, 2000]; others have the boundary layer and induce an in ectional instability at ow reversal, while accelerations tend to organize

Slinn, Donald

253

Thermal Transport in Suspended and Supported Few-Layer Graphene  

E-Print Network (OSTI)

Thermal Transport in Suspended and Supported Few-Layer Graphene Ziqian Wang,, Rongguo Xie,,,§, Cong few-layer graphene using a thermal-bridge configuration. The room temperature value of is comparable transport of the suspended graphene. The measured values of are generally lower than those from theoretical

Li, Baowen

254

Deep subwavelength plasmonic waveguide switch in double graphene layer structure  

E-Print Network (OSTI)

Deep subwavelength plasmonic waveguide switch in double graphene layer structure Hideo Iizuka in double graphene layer structure Hideo Iizuka1,a) and Shanhui Fan2,b) 1 Toyota Central Research December 2013) Graphene provides excellent prospects of the dynamic tunability, low propagation loss

Fan, Shanhui

255

Quantitative Spreading Kinetics of a Three Molecular Layer Liquid Patch  

Science Journals Connector (OSTI)

Quantitative Spreading Kinetics of a Three Molecular Layer Liquid Patch ... The late stage kinetics of the spreading of a smectic nanodrop on a solid surface was investigated by direct and real time imaging of a three molecular layer patch using the SEEC microscopy. ... (15) At some stage of the spreading kinetics, the structure reduces to a single bilayer patch lying on the surface monolayer. ...

Olivier Noel; Jean-Luc Buraud; Laurent Berger; Dominique Ausserre?

2010-03-19T23:59:59.000Z

256

Combating Time Synchronization Attack: A Cross Layer Defense Mechanism  

E-Print Network (OSTI)

is applied to identify the PMU being under TSA. Both the physical layer and upper layer algorithms- munication infrastructure [8]. Nowadays most researches on cyber physical system security focus on false data- ply enhancing the firmware of the monitoring devices. In addition, unlike a malicious data attack [10

Li, Husheng

257

IOFSL: I/O Forwarding Scalability Layer | Argonne National Laboratory  

NLE Websites -- All DOE Office Websites (Extended Search)

IOFSL: I/O Forwarding Scalability Layer IOFSL: I/O Forwarding Scalability Layer IOFSL is used to aggregate I/O operations, enabling large-scale application tracing for performance analysis of file systems IOFSL is used to aggregate I/O operations, enabling large-scale application tracing for performance analysis of file systems The IOFSL (I/O Forwarding Scalability Layer) project will design, build, and distribute a scalable, unified high-end computing I/O forwarding software layer that will be adopted and supported by DOE Office of Science and NNSA. This software layer will Provide function shipping at the file system interface level (without requiring middleware) that enables asynchronous coalescing and I/O without jeopardizing determinism for computation; Offload file system function from simple or full OS client processes

258

Kinetic Alfven double layer formed by electron viscosity  

SciTech Connect

The effect of the electron viscosity on the kinetic Alfven solitary wave is investigated. It is found that small electron viscosity changes the electron motion along the magnetic field producing a boundary layer, and thus that in a low beta electron-ion plasma({beta} Much-Less-Than m{sub e}/m{sub i}), an obliquely propagating kinetic solitary Alfven wave can become a double layer. This double layer can exist in the sub-Alfvenic and super-Alfvenic regimes. The length scale of density drop for this double layer is on the order of that of the conventional kinetic solitary Alfven wave, and thus this double layer can accelerate electrons on a very short length scale.

Woo, M. H.; Ryu, C.-M. [Department of Physics, Pohang University of Science and Technology, Pohang 790-784 (Korea, Republic of); Choi, C. R. [Department of Physics, Korea Advanced Institute of Science and Technology, Taejon 305-701 (Korea, Republic of)

2012-07-15T23:59:59.000Z

259

Some consequences of the fluorination of brucite-like layers in layered double hydroxides: Adsorption  

Science Journals Connector (OSTI)

Abstract Hydrotalcite-like compounds were synthesised by co-precipitation method. The originality of the work is the replacement of structural OH? by F?. Fluoride anions were incorporated as a part of the brucite like layers not as compensating anions. The resulting adsorptive properties of fluorinated materials are very different than those observed for the fluorine-free sample. The polarity and polarisability parameters were calculated by using dyes and xenon as molecular probes. The hydrogen bond accepting character and acido-basicity are the main properties enhanced because of the fluorination of hydrotalcite-like compounds, helping to diversify adsorption sites for chromophores or water.

Enrique Lima; Heriberto Pfeiffer; Jorge Flores

2014-01-01T23:59:59.000Z

260

Transient finite element analysis of electric double layer using Nernst-Planck-Poisson equations with a modified stern layer  

E-Print Network (OSTI)

Finite element analysis of electric double layer capacitors using a transient nonlinear Nernst-Planck-Poisson (NPP) model and Nernst-Planck-Poisson-modified Stern layer (NPPMS) model are presented in 1D and 2D. The NPP model provided unrealistic ion...

Lim, Jong Il

2007-04-25T23:59:59.000Z

Note: This page contains sample records for the topic "layers uncoated acrylic" 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

High efficiency photodetectors fabricated by electrostatic layer-by-layer self-assembly of CdTe quantum dots  

E-Print Network (OSTI)

High efficiency photodetectors fabricated by electrostatic layer-by-layer self-assembly of CdTe 20 October 2008 We demonstrate high-performance photodetectors from multilayers of CdTe quantum dots. The synthesis of CdTe QDs in aqueous solution using cadmium perchlorate hydrate and Al2Te3 was previously re

Lin, Lih Y.

262

Critical current of a lateral Josephson junction for layered superconductors  

Science Journals Connector (OSTI)

We have studied the effect of an applied magnetic field Hext on the critical current Ic of a lateral superconducting-insulating-superconducting (S-I-S) Josephson junction between two layered superconductors. In this configuration the layering direction of the superconducting electrodes is parallel to the plane of the junction. We find that the behavior of Ic(Hext) is determined by the parameter ?=jcd0/??j?, where ?? and j? are, respectively, the penetration depth and the interlayer critical current characterizing the bulk superconductors. Also jc is the critical current density between layers on opposite sides of the junction, while d0 is the layer thickness. For ??1 the length scale for field penetration along the direction of the junction is given by ??, leading to the usual Fraunhofer dependence for Ic(Hext). The scenario is vastly different for ??1. In this case the intraelectrode layer couplings are relatively weak and Josephson vortex penetration is found to occur between the layers. The physics of this situation is determined by the standard map. We find that in the absence of an external field Josephson vortices penetrate the structure and form an ordered array. This leads to a value of Ic(0) proportional to the number of layers N. This situation is however upset by a small external field. In this case the vortex distribution acquires an interesting chaotic character which leads to a sizable decrease of the critical current to a value Ic(Hext)? ?N .

Mikhail V. Fistul’ and Gabriele F. Giuliani

1994-09-01T23:59:59.000Z

263

Methods for improved growth of group III nitride buffer layers  

DOE Patents (OSTI)

Methods are disclosed for growing high crystal quality group III-nitride epitaxial layers with advanced multiple buffer layer techniques. In an embodiment, a method includes forming group III-nitride buffer layers that contain aluminum on suitable substrate in a processing chamber of a hydride vapor phase epitaxy processing system. A hydrogen halide or halogen gas is flowing into the growth zone during deposition of buffer layers to suppress homogeneous particle formation. Some combinations of low temperature buffers that contain aluminum (e.g., AlN, AlGaN) and high temperature buffers that contain aluminum (e.g., AlN, AlGaN) may be used to improve crystal quality and morphology of subsequently grown group III-nitride epitaxial layers. The buffer may be deposited on the substrate, or on the surface of another buffer. The additional buffer layers may be added as interlayers in group III-nitride layers (e.g., GaN, AlGaN, AlN).

Melnik, Yurity; Chen, Lu; Kojiri, Hidehiro

2014-07-15T23:59:59.000Z

264

Ocean Barrier Layers’ Effect on Tropical Cyclone Intensification  

SciTech Connect

Improving a tropical cyclone's forecast and mitigating its destructive potential requires knowledge of various environmental factors that influence the cyclone's path and intensity. Herein, using a combination of observations and model simulations, we systematically demonstrate that tropical cyclone intensification is significantly affected by salinity-induced barrier layers, which are 'quasi-permanent' features in the upper tropical oceans. When tropical cyclones pass over regions with barrier layers, the increased stratification and stability within the layer reduce storm-induced vertical mixing and sea surface temperature cooling. This causes an increase in enthalpy flux from the ocean to the atmosphere and, consequently, an intensification of tropical cyclones. On average, the tropical cyclone intensification rate is nearly 50% higher over regions with barrier layers, compared to regions without. Our finding, which underscores the importance of observing not only the upper-ocean thermal structure but also the salinity structure in deep tropical barrier layer regions, may be a key to more skillful predictions of tropical cyclone intensities through improved ocean state estimates and simulations of barrier layer processes. As the hydrological cycle responds to global warming, any associated changes in the barrier layer distribution must be considered in projecting future tropical cyclone activity.

Balaguru, Karthik; Chang, P.; Saravanan, R.; Leung, Lai-Yung R.; Xu, Zhao; Li, M.; Hsieh, J.

2012-09-04T23:59:59.000Z

265

NMR of thin layers using a meanderline surface coil  

DOE Patents (OSTI)

A miniature meanderline sensor coil which extends the capabilities of nuclear magnetic resonance (NMR) to provide analysis of thin planar samples and surface layer geometries. The sensor coil allows standard NMR techniques to be used to examine thin planar (or curved) layers, extending NMRs utility to many problems of modern interest. This technique can be used to examine contact layers, non-destructively depth profile into films, or image multiple layers in a 3-dimensional sense. It lends itself to high resolution NMR techniques of magic angle spinning and thus can be used to examine the bonding and electronic structure in layered materials or to observe the chemistry associated with aging coatings. Coupling this sensor coil technology with an arrangement of small magnets will produce a penetrator probe for remote in-situ chemical analysis of groundwater or contaminant sediments. Alternatively, the sensor coil can be further miniaturized to provide sub-micron depth resolution within thin films or to orthoscopically examine living tissue. This thin-layer NMR technique using a stationary meanderline coil in a series-resonant circuit has been demonstrated and it has been determined that the flat meanderline geometry has about he same detection sensitivity as a solenoidal coil, but is specifically tailored to examine planar material layers, while avoiding signals from the bulk.

Cowgill, Donald F. (San Ramon, CA)

2001-01-01T23:59:59.000Z

266

USE OF ATOMIC LAYER DEPOSITION OF FUNCTIONALIZATION OF NANOPOROUS BIOMATERIALS  

SciTech Connect

Due to its chemical stability, uniform pore size, and high pore density, nanoporous alumina is being investigated for use in biosensing, drug delivery, hemodialysis, and other medical applications. In recent work, we have examined the use of atomic layer deposition for coating the surfaces of nanoporous alumina membranes. Zinc oxide coatings were deposited on nanoporous alumina membranes using atomic layer deposition. The zinc oxide-coated nanoporous alumina membranes demonstrated antimicrobial activity against Escherichia coli and Staphylococcus aureus bacteria. These results suggest that atomic layer deposition is an attractive technique for modifying the surfaces of nanoporous alumina membranes and other nanostructured biomaterials.

Brigmon, R.; Narayan, R.; Adiga, S.; Pellin, M.; Curtiss, L.; Stafslien, S.; Chisholm, B.; Monteiro-Riviere, N.; Elam, J.

2010-02-08T23:59:59.000Z

267

Radiography for a Shock-accelerated Liquid Layer  

SciTech Connect

This program supported the experimental study of the itneraction of planar shock waves with both solid structures (a single cylinder or a bank of cylinders) and single and multiple liquid layers. Objectives of the study included: characterization of the shock refraction patterns; measurements of the impulsive loading of the solid structures; observation of the response of the liquid layers to shock acceleration; assessment of the shock-mitigation effects of single and multiple liquid layers. The uploaded paper is intended as a final report for the entire funding period. The poster described in the paper won the Best Poster Award at the 25 International Symposium on Shock Waves.

P. Meekunnasombat

2005-07-01T23:59:59.000Z

268

Multi-layer switched reluctance motor to reduce torque ripple  

Science Journals Connector (OSTI)

A new multi-layer switched reluctance motor (MSRM) having a high starting torque capability with reduced torque ripple and acoustic noise is presented. Measured data and the results of numerical analysis are given to evaluate the motor structure. In the numerical analysis, due to the highly nonlinear nature of the motor, finite element analysis (FEA) is employed. A prototype multi-layer SRM is built and tested in the experimental studies. The obtained test and simulation results show that the multi-layer motor structure has a smooth torque profile with high starting torque and less acoustic noise.

Ferhat Daldaban; Nurettin Ustkoyuncu

2008-01-01T23:59:59.000Z

269

Effects of the Spatial Extent of Multiple Harmonic Layers  

SciTech Connect

An analytic model for single particle motion in the presence of a wave field and multiple cyclotron harmonics is developed and investigated. The model suggests that even in the absence of Doppler broadening, cyclotron harmonic layers have finite spatial extent. This allows for particles to interact with more than one harmonic layer simultaneously, provided the layers are tightly packed. The latter phenomenon is investigated in the context of the model using symplectic mapping techniques. Then the model behavior is compared with numerical simulations of neutral beam particle trajectories in NSTX using the full-orbit code SPIRAL.

Burby, J. W.; Kramer, G. J.; Phillips, C. K.; Valeo, E. J. [Princeton Plasma Physics Laboratory, Princeton University, Princeton, NJ 08543 (United States)

2011-12-23T23:59:59.000Z

270

Method for making photovoltaic devices using oxygenated semiconductor thin film layers  

DOE Patents (OSTI)

A method for making a photovoltaic device is presented. The method includes steps of disposing a window layer on a substrate and disposing an absorber layer on the window layer. Disposing the window layer, the absorber layer, or both layers includes introducing a source material into a deposition zone, wherein the source material comprises oxygen and a constituent of the window layer, of the absorber layer or of both layers. The method further includes step of depositing a film that comprises the constituent and oxygen.

Johnson, James Neil; Albin, David Scott; Feldman-Peabody, Scott; Pavol, Mark Jeffrey; Gossman, Robert Dwayne

2014-12-16T23:59:59.000Z

271

Self assembled multi-layer nanocomposite of graphene and metal oxide materials  

DOE Patents (OSTI)

Nanocomposite materials having at least two layers, each layer consisting of one metal oxide bonded to at least one graphene layer were developed. The nanocomposite materials will typically have many alternating layers of metal oxides and graphene layers, bonded in a sandwich type construction and will be incorporated into an electrochemical or energy storage device.

Liu, Jun; Aksay, Ilhan A; Choi, Daiwon; Kou, Rong; Nie, Zimin; Wang, Donghai; Yang, Zhenguo

2013-10-22T23:59:59.000Z

272

Self assembled multi-layer nanocomposite of graphene and metal oxide materials  

SciTech Connect

Nanocomposite materials having at least two layers, each layer consisting of one metal oxide bonded to at least one graphene layer were developed. The nanocomposite materials will typically have many alternating layers of metal oxides and graphene layers, bonded in a sandwich type construction and will be incorporated into an electrochemical or energy storage device.

Liu, Jun; Choi, Daiwon; Kou, Rong; Nie, Zimin; Wang, Donghai; Yang, Zhenguo

2014-09-16T23:59:59.000Z

273

A multiple layer fusion approach on keystroke dynamics  

Science Journals Connector (OSTI)

In this paper, we present a novel keystroke dynamic recognition system by means of a novel two-layer fusion approach. First, we extract four types of keystroke latency as the feature from ... between two sets of ...

Pin Shen Teh; Andrew Beng Jin Teoh; Connie Tee…

2011-02-01T23:59:59.000Z

274

Method Of Transferring A Thin Crystalline Semiconductor Layer  

NLE Websites -- All DOE Office Websites (Extended Search)

layer from one substrate to the other substrate. U.S. Patent No.: 7,153,761 (DOE S-104,967) Patent Application Filing Date: October 3, 2005 Patent Issue Date: December 26, 2006...

275

3-D Thermoconvection in an Anisotropic Inclined Sedimentary Layer  

Science Journals Connector (OSTI)

......3-D thermoconvection in an anisotropic inclined sedimentary layer...basin generally present an anisotropic structure with maximum permeability...We extend these results to anisotropic media, with anisotropies...are usually embedded in a shale matrix (Busch 1974; Pettijohn......

Anne Ormond; Pierre Genthon

1993-02-01T23:59:59.000Z

276

Ray tracing and amplitude calculation in anisotropic layered media  

Science Journals Connector (OSTI)

......amplitude calculation in anisotropic layered media M. Sadri...0.3 for moderately anisotropic rocks to 0.3-0...higher for compacted shale formations (Thomsen...Thomsen's (1986) anisotropic parameters were defined......

M. Sadri; M. A. Riahi

2010-03-01T23:59:59.000Z

277

Graphene interconnects fully encapsulated in layered insulator hexagonal boron nitride  

Science Journals Connector (OSTI)

We demonstrate improvements in the electrical performance of graphene interconnects with full encapsulation by lattice-matching layered insulator, hexagonal boron nitride (h-BN). A novel layer-based transfer method is developed to assemble the top passivating layer of h-BN on the graphene surface to construct the h-BN/graphene/h-BN heterostructures. The encapsulated graphene interconnects (EGIs) are characterized and compared with graphene interconnects on either SiO2 or h-BN substrates with no top passivating h-BN layer. We observe significant improvements in both the maximum current density and breakdown voltage in EGIs. Compared with the uncovered structures, EGIs also show an appreciable increase (~67%) in power density at breakdown. These improvements are achieved without degrading the carrier transport characteristics in graphene wires. In addition, EGIs exhibit a minimal environment impact, showing electrical behavior insensitive to ambient conditions.

Nikhil Jain; Chris A Durcan; Robin Jacobs-Gedrim; Yang Xu; Bin Yu

2013-01-01T23:59:59.000Z

278

Simulation and evaluation of the reactive virtual node layer  

E-Print Network (OSTI)

Developing software in a wireless, ad hoc environment is an intrinsically difficult problem. One way to mitigate it is to add an abstraction layer between the software and the individual mobile devices. This thesis describes ...

Spindel, Mike (Mike C.)

2008-01-01T23:59:59.000Z

279

Superconducting structure with layers of niobium nitride and aluminum nitride  

DOE Patents (OSTI)

A superconducting structure is formed by depositing alternate layers of aluminum nitride and niobium nitride on a substrate. Deposition methods include dc magnetron reactive sputtering, rf magnetron reactive sputtering, thin-film diffusion, chemical vapor deposition, and ion-beam deposition. Structures have been built with layers of niobium nitride and aluminum nitride having thicknesses in a range of 20 to 350 Angstroms. Best results have been achieved with films of niobium nitride deposited to a thickness of approximately 70 Angstroms and aluminum nitride deposited to a thickness of approximately 20 Angstroms. Such films of niobium nitride separated by a single layer of aluminum nitride are useful in forming Josephson junctions. Structures of 30 or more alternating layers of niobium nitride and aluminum nitride are useful when deposited on fixed substrates or flexible strips to form bulk superconductors for carrying electric current. They are also adaptable as voltage-controlled microwave energy sources.

Murduck, James M. (Lisle, IL); Lepetre, Yves J. (Lauris, FR); Schuller, Ivan K. (Woodridge, IL); Ketterson, John B. (Evanston, IL)

1989-01-01T23:59:59.000Z

280

Superconducting structure with layers of niobium nitride and aluminum nitride  

DOE Patents (OSTI)

A superconducting structure is formed by depositing alternate layers of aluminum nitride and niobium nitride on a substrate. Deposition methods include dc magnetron reactive sputtering, rf magnetron reactive sputtering, thin-film diffusion, chemical vapor deposition, and ion-beam deposition. Structures have been built with layers of niobium nitride and aluminum nitride having thicknesses in a range of 20 to 350 Angstroms. Best results have been achieved with films of niobium nitride deposited to a thickness of approximately 70 Angstroms and aluminum nitride deposited to a thickness of approximately 20 Angstroms. Such films of niobium nitride separated by a single layer of aluminum nitride are useful in forming Josephson junctions. Structures of 30 or more alternating layers of niobium nitride and aluminum nitride are useful when deposited on fixed substrates or flexible strips to form bulk superconductors for carrying electric current. They are also adaptable as voltage-controlled microwave energy sources. 8 figs.

Murduck, J.M.; Lepetre, Y.J.; Schuller, I.K.; Ketterson, J.B.

1989-07-04T23:59:59.000Z

Note: This page contains sample records for the topic "layers uncoated acrylic" 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.


281

Quantifying Residual Strains in Specimens Prepared by Additive Layer Manufacturing  

Science Journals Connector (OSTI)

Residual stresses and strains are prevalent in many components, especially those that are made using additive layer manufacturing. The residual strains are superposed onto any ... analysis may lead to inaccurate ...

A. N. Okioga; R. J. Greene; R. A. Tomlinson

2014-01-01T23:59:59.000Z

282

Performance of a boundary layer ingesting propulsion system  

E-Print Network (OSTI)

This thesis presents an assessment of the aerodynamic performance of an aircraft propulsion system, with embedded engines, in the presence of aircraft fuselage boundary layer ingestion (BLI). The emphasis is on defining ...

Plas, Angélique (Angélique Pascale)

2006-01-01T23:59:59.000Z

283

Deep Insights from Thin Layers | Department of Energy  

Office of Environmental Management (EM)

super-thin layer at a time, creating opportunities for new innovations -- from better biofuels to new medicines. Proteins are critical to life; they're the body's essential...

284

Examining A Hypersonic Turbulent Boundary Layer at Low Reynolds Number  

E-Print Network (OSTI)

The purpose of the current study was to answer several questions related to hypersonic, low Reynolds number, turbulent boundary layers, of which available data related to turbulence quantities is scarce. To that end, a unique research facility...

Semper, Michael Thomas

2013-05-15T23:59:59.000Z

285

Heterojunction solar cells produced by porous silicon layer transfer technology  

Science Journals Connector (OSTI)

In this paper, we present the result of heterojunction solar cells based on porous silicon layer transfer technology. a-Si/c-Si structured solar cells were prepared in which the c-Si ... was investigated. The spe...

Zhihao Yue; Honglie Shen; Lei Zhang; Bin Liu; Chao Gao; Hongjie Lv

2012-09-01T23:59:59.000Z

286

Lithium-ion batteries having conformal solid electrolyte layers  

DOE Patents (OSTI)

Hybrid solid-liquid electrolyte lithium-ion battery devices are disclosed. Certain devices comprise anodes and cathodes conformally coated with an electron insulating and lithium ion conductive solid electrolyte layer.

Kim, Gi-Heon; Jung, Yoon Seok

2014-05-27T23:59:59.000Z

287

Turbulent Vertical Kinetic Energy in the Ocean Mixed Layer  

Science Journals Connector (OSTI)

Vertical velocities in the ocean boundary layer were measured for two weeks at an open ocean, wintertime site using neutrally buoyant floats. Simultaneous measurements of the surface meteorology and surface waves showed a large variability in ...

Eric A. D'Asaro

2001-12-01T23:59:59.000Z

288

Anisotropic Etching and Nanoribbon Formation in Single-Layer Graphene  

E-Print Network (OSTI)

We demonstrate anisotropic etching of single-layer graphene by thermally activated nickel nanoparticles. Using this technique, we obtain sub-10-nm nanoribbons and other graphene nanostructures with edges aligned along a ...

Campos, Leonardo

289

Tracer stirring around a meddy: The formation of layering  

Science Journals Connector (OSTI)

The dynamics of the formation of layering surrounding meddy-like vortex lenses is investigated using Primitive Equation (PE), Quasi Geostrophic (QG) and tracer advection models. Recent in situ data inside a meddy confirmed the formation of highly ...

Thomas Meunier; Claire Ménesguen; Richard Schopp; Sylvie Le Gentil

290

Scaling Laws for the Heterogeneously Heated Free Convective Boundary Layer  

Science Journals Connector (OSTI)

The heterogeneously heated free convective boundary layer (CBL) is investigated by means of dimensional analysis and results from large-eddy simulations (LES) and direct numerical simulations (DNS). The investigated physical model is a CBL that ...

Chiel C. van Heerwaarden; Juan Pedro Mellado; Alberto De Lozar

2014-11-01T23:59:59.000Z

291

Global ocean wind power sensitivity to surface layer stability  

E-Print Network (OSTI)

2009 Global ocean wind power sensitivity to surface layer1 May 2009. [ 1 ] Global ocean wind power has recently beenincreases mean global ocean wind power by +58% and À4%,

Capps, Scott B; Zender, Charles S

2009-01-01T23:59:59.000Z

292

Mixing Line Analysis of Clouds and Cloudy Boundary Layers  

Science Journals Connector (OSTI)

The diagnostic study of the thermodynamic structure of nonprecipitating clouds and cloudy boundary layers is formulated using a mixing line and saturation point approach. A parametric model for the mean structure is developed as a tool for ...

Alan K. Betts

1985-12-01T23:59:59.000Z

293

Ultrasonic quantitative NDE of layered media: the inverse problem  

E-Print Network (OSTI)

used. The technique is fully automated and computer-controlled and can be readily used for in-situ NDE applications. Using this technique, the thickness and the wavespeed of the individual layers can be extractedfrom the same measurement, without...

Jaminet, Paul Thomas

2012-06-07T23:59:59.000Z

294

Improvements in distribution of meteorological data using application layer multicast  

E-Print Network (OSTI)

in so many applications, the impact of these limitations is often substantial. This thesis removes these limitations by suggesting improvements in the IDD system and the LDM. We present new algorithms for constructing an application-layer data...

Shah, Saurin Bipin

2007-04-25T23:59:59.000Z

295

SWERA/Climate Layers Information | Open Energy Information  

Open Energy Info (EERE)

Climate Layers Information Climate Layers Information < SWERA Jump to: navigation, search SWERA logo.png Solar and Wind Energy Resource Assessment (SWERA) Interactive Web PortalPowered by OpenEI Getting Started Data Sets Analysis Tools About SWERA Climate Layers The climate layers are derived from data provided by NASA's Prediction of Worldwide Energy Resource (POWER) project derived from NASA's climate research to support renewable energy industries. The Surface meteorology and Solar Energy (SSE) data set contains solar parameters principally derived from satellite observations and meteorology parameters from an atmospheric model constrained to satellite and sounding observations. It is a 22-year climatology (July 1983- June 2005) on a one-degree latitude by one-degree longitude grid. The global coverage of the SSE data set fills

296

Fuel Cell Catalyst Layers: A Polymer Science Perspective  

Science Journals Connector (OSTI)

With the approaching commercialization of PEM fuel cell technol., developing active, inexpensive non-precious metal ORR catalyst materials to replace currently used Pt-based catalysts is a necessary and essential requirement in order to reduce the overall system cost. ... Polymer electrolyte membranes were catalyzed by direct application of thin film layers cast from solns. of suspended Pt/C catalyst and solubilized Nafion ionomer. ... Identification of dominant transport mechanisms in PEMFC cathode catalyst layers operated under low RH ...

Steven Holdcroft

2013-06-28T23:59:59.000Z

297

Neutron detectors comprising ultra-thin layers of boron powder  

SciTech Connect

High-efficiency neutron detector substrate assemblies comprising a first conductive substrate, wherein a first side of the substrate is in direct contact with a first layer of a powder material having a thickness of from about 50 nm to about 250 nm and comprising .sup.10boron, .sup.10boron carbide or combinations thereof, and wherein a conductive material is in proximity to the first layer of powder material; and processes of making said neutron detector substrate assemblies.

Wang, Zhehul; Morris, Christopher

2013-07-23T23:59:59.000Z

298

Parametric resonances and stochastic layer induced by a phase modulation  

SciTech Connect

The Hamiltonian system with phase modulation in a higher harmonic rf cavity is experimentally studied on the IUCF cooler ring. The Poincare maps in the resonant rotating frame are obtained from experimental data and compared with numerical tracking. The formation of the stochastic layer due to the overlap of parametric resonances is discussed. The dependence of the stochastic layer on the voltage of the higher harmonic rf cavity, amplitude and frequency of the phase modulation is studied.

Liu, J.Y.; Ball, M.; Brabson, B. [Indiana Univ., Bloomington, IN (United States). Cyclotron Facility] [and others

1995-12-31T23:59:59.000Z

299

Phase-change-related degradation of catalyst layers in  

NLE Websites -- All DOE Office Websites (Extended Search)

Phase-change-related degradation of catalyst layers in Phase-change-related degradation of catalyst layers in proton-exchange-membrane fuel cells Title Phase-change-related degradation of catalyst layers in proton-exchange-membrane fuel cells Publication Type Journal Article Year of Publication 2013 Authors Hwang, Gi Suk, Hyoungchul Kim, Roger Lujan, Rangachary Mukundan, Dusan Spernjak, Rodney L. Borup, Massoud Kaviany, Moo Hwan Kim, and Adam Z. Weber Journal Electrochimica Acta Volume 95 Pagination 29 - 37 Date Published 4/2013 ISSN 00134686 Keywords degradation, Environmental scanning electron microscope (ESEM), Freeze/thaw cycle, Membrane electrode assembly (MEA), Nanostructured thin film (NSTF), Pt/C dispersion Abstract Understanding and optimizing water and thermal management in the catalyst layer of proton-exchange-membrane fuel cells is crucial for performance and durability improvements. This is especially the case at low temperatures, where liquid water and even ice may exist. In this article, the durability of a traditional Pt/C dispersed and a nanostructure thin film (NSTF) membrane-electrode assembly (MEA) are examined under wet/dry and freeze/thaw cycles using both in situ and ex situ experiments. Multiple isothermal cold starts result in a performance degradation for the dispersed MEA, while no such a degradation is found in the NSTF. The results are consistent with stand-alone MEA tests, wherein the dispersed catalyst layer results in an exponential increase in the number and size of cracks until it delaminates from the membrane due to the impact of the freeze/thaw process within the catalyst-layer pores. The NSTF catalyst layer shows minimal crack generation without delamination since the ice forms on top of the layer. The results are useful for understanding degradation due to phase-change containing cycles.

300

Understanding Molecular Interactions within Chemically Selective Layered Polymer Assemblies  

SciTech Connect

This work focuses on two broad issues. These are (1) the molecular origin of the chemical selectivity achieved with ultrathin polymer multilayers, and (2) how the viscoelastic properties of the polymer layers are affected by exposure to solvent and analytes. These issues are inter-related, and to understand them we need to design experiments that probe both the energetic and kinetic aspects of interfacial adsorption processes. This project focuses on controling the chemical structure, thickness, morphology and sequential ordering of polymer layers bound to interfaces using maleimide-vinyl ether and closely related alternating copolymerization chemistry and efficient covalent cross-linking reactions that allow for layer-by-layer polymer deposition. This chemistry has been developed during the funding cycle of this Grant. We have measure the equilibrium constants for interactions between specific layers within the polymer interfaces and size-controlled, surface-functionalized gold nanoparticles. The ability to control both size and functionality of gold nanoparticle model analytes allows us to evaluate the average “pore size” that characterizes our polymer films. We have measured the “bulk” viscosity and shear modulus of the ultrathin polymer films as a function of solvent overlayer identity using quartz crystal microbalance complex impedance measurements. We have measured microscopic viscosity at specific locations within the layered polymer interfaces with time-resolved fluorescence lifetime and depolarization techniques. We combine polymer, cross-linking and nanoparticle synthetic expertise with a host of characterization techniques, including QCM gravimetry and complex impedance analysis, steady state and time-resolved spectroscopies.

Gary J. Blanchard

2009-06-30T23:59:59.000Z

Note: This page contains sample records for the topic "layers uncoated acrylic" 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

E-Print Network 3.0 - amplitude double layers Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

Abstract --This paper deals a double layer and a single layer Flux-Switching Permanent Magnet (FSPM) motors for a fault Summary: Abstract --This paper deals a double layer and a...

302

Quantitative differences in tissue surface tension influence zebrafish germ layer positioning  

E-Print Network (OSTI)

Quantitative differences in tissue surface tension influence zebrafish germ layer positioning Eva surface tension, influences spatial positioning between zebrafish germ layer tissues. We show correlates with differences in tissue surface tension. We also show that germ layer tissues from untreated

Jülicher, Frank

303

Intermittent Turbulence in the Very Stable Ekman Layer  

SciTech Connect

INTERMITTENT TURBULENCE IN THE VERY STABLE EKMAN LAYER This study describes a Direct Numerical Simulation (DNS) of a very stable Ekman layer in which a constant downward heat flux is applied at the lower boundary, thus cooling the fluid above. Numerical experiments were performed in which the strength of the imposed heat flux was varied. For downward heat fluxes above a certain critical value the turbulence becomes intermittent and, as the heat flux increases beyond this value, the flow tends to relaminarize because of the very strong ambient stratification. We adopt Mahrt?s (1999) definition of the very stable boundary layer as a boundary layer in which intermittent, rather than continuous turbulence, is observed. Numerical experiments were used to test various hypothesis of where in ?stability parameter space? the very stable boundary layer is found. These experiments support the findings of Howell and Sun (1999) that the boundary layer will exhibit intermittency and therefore be categorized as ?very stable?, when the stability parameter, z/L, exceeds unity. Another marker for the very stable boundary layer, Derbyshire?s (1990) maximum heat flux criterion, was also examined. Using a case study drawn from the simulations where turbulence intermittency was observed, the mechanism that causes the intermittence was investigated. It was found that patchy turbulence originates from a vigorous inflectional, Ekman-like instability -- a roll cell -- that lifts colder air over warmer air. The resulting convective instability causes an intense burst of turbulence. This turbulence is short-lived because the lifting motion of the roll cell, as well as the roll cell itself, is partially destroyed after the patchy turbulence is generated. Examples of intermittent turbulence obtained from the simulations appear to be consistent with observations of intermittency even though the Reynolds number of the DNS is relatively low (400).

Barnard, James C.

2001-01-05T23:59:59.000Z

304

Simulation of micellar-polymer flooding of a layered oil reservoir of nonuniform thickness  

Science Journals Connector (OSTI)

The dynamics of oil displacement from a layered reservoir of nonuniform thickness consisting of two hydrodynamically connected layers of different absolute permeability is studied. Results of numerical calcula...

N. S. Khabeev; N. A. Inogamov

2008-11-01T23:59:59.000Z

305

A dual mass flux framework for boundary layer convection  

NLE Websites -- All DOE Office Websites (Extended Search)

A dual mass flux framework for boundary layer convection A dual mass flux framework for boundary layer convection Neggers, Roel European Centre for Medium-range Weather Forecasts (ECMWF) Category: Modeling A new convective boundary layer scheme is presented that is currently being developed for the Integrated Forecasting System (IFS) of the European Centre for Medium-range Weather Forecasts (ECMWF). Part of the total turbulent flux is modeled through advective mass flux by multiple updrafts, initialized at the surface. Two groups of updrafts are explicitly represented; i) updrafts that never reach their lifting condensation level, and ii) updrafts that condensate and become cloudy. Key new ingredient is the flexibility of the associated updraft area fractions, as a function of model state. As a result, an extra degree of freedom is introduced in the

306

A Liquid Layer Solution for the Grid | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

A Liquid Layer Solution for the Grid A Liquid Layer Solution for the Grid A Liquid Layer Solution for the Grid September 15, 2011 - 2:47pm Addthis The Liquid Metal Battery is comprised of liquid metal electrodes and a liquid electrolyte of differing densities, which allows the liquids to separate and stratify without the need for any solid separator. The Liquid Metal Battery is comprised of liquid metal electrodes and a liquid electrolyte of differing densities, which allows the liquids to separate and stratify without the need for any solid separator. Kristina Pflanz Writer & Contractor, Advanced Research Projects Agency - Energy What does this mean for me? With its all-liquid design, this battery is much more efficient than today's rechargeable batteries, which use 80-90% of the space to hold

307

ARM - Field Campaign - Boundary Layer CO2 Using CW Lidar  

NLE Websites -- All DOE Office Websites (Extended Search)

govCampaignsBoundary Layer CO2 Using CW Lidar govCampaignsBoundary Layer CO2 Using CW Lidar Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Boundary Layer CO2 Using CW Lidar 2005.05.21 - 2005.05.24 Lead Scientist : Michael Dobbs Description Overflights Underway at ACRF Southern Great Plains Site (M.Dobbs/J.Liljegren) Science collaborators at ITT Industries and the National Aeronautics and Space Administration (NASA) Langley Research Center (LaRC) conducted flights over the Central Facility at ACRF's Southern Great Plains (SGP) site as part of the Climate Sources and Sink (CO2) Intensive Operational Period (IOP), using a CW lidar. The objective of the flights was to validate, by demonstration and comparison with SGP ground observations, the performance of the ITT system when used in conjunction with retrieval

308

ARM - Field Campaign - Complex Layered Cloud Experiment (CLEX)  

NLE Websites -- All DOE Office Websites (Extended Search)

govCampaignsComplex Layered Cloud Experiment (CLEX) govCampaignsComplex Layered Cloud Experiment (CLEX) Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Complex Layered Cloud Experiment (CLEX) 1996.06.20 - 1996.07.02 Lead Scientist : Graeme Stephens Data Availability TABLE 1 Locations and Status of Extended Facilitiesa SMOS(c) Comments Site Elevation(b) Latitude, Surface Flux SIROS(c) (m) Longitude Type Station(c) (deg) Larned, KS 632 38.202 N Wheat ECOR Yes Yes Power and communication center EF-1 99.316 W 9/95 9/95 9/95 installation planned for July 1995 Hillsboro, 450 38.306 N Pasture EBBR 8/95 No Yes 8/95 Power and communication center

309

Dual-bonded catalyst layer structure cathode for PEMFC  

Science Journals Connector (OSTI)

Novel electrode structure based on dual-bonded catalyst layer structure is reported to elevate proton exchange membrane fuel cell (PEMFC) cathode performance. Differing from conventional cathode with simplex PTFE or ionomer as binder material in catalyst layer (CL), dual-bonded CL combines those two types of binders, respectively, in a composite structure. In order to develop a cathode possessing the superior merits of both mass transport and proton transfer, a PTFE-rich CL and an ionomer-rich CL were fabricated on gas diffusion layer in proper order. Polarization characteristic of cathodes with dual-bonded CL, conventional PTFE-bonded CL and ionomer-bonded CL were evaluated at ambient pressure in oxygen/air. Better performance of cathode was achieved with dual-bonded, compared with conventional structures. Electric yield rate of dual-bonded cathode was about 50%, whilst that of conventional cathodes was about 40%.

Xuewei Zhang; Pengfei Shi

2006-01-01T23:59:59.000Z

310

Tunable Multiple Layered Dirac Cones in Optical Lattices  

SciTech Connect

We show that multiple layered Dirac cones can emerge in the band structure of properly addressed multicomponent cold fermionic gases in optical lattices. The layered Dirac cones contain multiple copies of massless spin-1/2 Dirac fermions at the same location in momentum space, whose different Fermi velocity can be tuned at will. On-site microwave Raman transitions can further be used to mix the different Dirac species, resulting in either splitting of or preserving the Dirac point (depending on the symmetry of the on-site term). The tunability of the multiple layered Dirac cones allows us to simulate a number of fundamental phenomena in modern physics, such as neutrino oscillations and exotic particle dispersions with E{approx}p{sup N} for arbitrary integer N.

Lan, Z.; Lu, W.; Oehberg, P. [SUPA, Department of Physics, Heriot-Watt University, EH14 4AS, Edinburgh (United Kingdom); Celi, A. [ICFO - Institute of Photonic Sciences Av. Carl Friedrich Gauss, num. 3, E-08860 Castelldefels, Barcelona (Spain); Lewenstein, M. [ICFO - The Institute of Photonic Sciences Av. Carl Friedrich Gauss, num. 3, E-08860 Castelldefels, Barcelona (Spain); ICREA-Institucio Catalana de Recerca i Estudis Avancats, 08010 Barcelona (Spain)

2011-12-16T23:59:59.000Z

311

Growth mode evolution of hafnium oxide by atomic layer deposition  

SciTech Connect

HfO{sub 2} thin films were deposited using tetrakis-ethylmethylamido hafnium and H{sub 2}O as precursors on silicon by atomic layer deposition (ALD). The morphology and microstructures at different ALD cycles were characterized by atomic force microscopy and high-resolution transmission electron microscopy. Based on the height–height correlation function and power spectral density function, quantitative analysis of surface morphologies was performed. Three characteristic dimensions (?{sub 1}, ?{sub 2}, and ?{sub 3}) corresponding to three surface structures, islands, local and global fluctuations, were identified. The evolution of ALD growth mode at range of the three critical scales was investigated, respectively. It suggests the transformation of growth mode from quasi two-dimensional layer-by-layer to three-dimensional island for global fluctuations.

Nie, Xianglong; Ma, Fei; Ma, Dayan, E-mail: madayan@mail.xjtu.edu.cn [State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, Shaanxi (China); Xu, Kewei [State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, People's Republic of China and Department of Physics and Opt-electronic Engineering, Xi'an University of Arts and Science, Xi'an 710065, Shaanxi (China)

2014-01-15T23:59:59.000Z

312

Ternary metal-rich sulfide with a layered structure  

DOE Patents (OSTI)

A ternary Nb-Ta-S compound is provided having the atomic formula, Nb.sub.1.72 Ta.sub.3.28 S.sub.2, and exhibiting a layered structure in the sequence S-M3-M2-M1-M2-M3-S wherein S represents sulfur layers and M1, M2, and M3 represent Nb/Ta mixed metal layers. This sequence generates seven sheets stacked along the [001] direction of an approximate body centered cubic crystal structure with relatively weak sulfur-to-sulfur van der Waals type interactions between adjacent sulfur sheets and metal-to-metal bonding within and between adjacent mixed metal sheets.

Franzen, Hugo F. (Ames, IA); Yao, Xiaoqiang (Ames, IA)

1993-08-17T23:59:59.000Z

313

Nanostructure templating using low temperature atomic layer deposition  

DOE Patents (OSTI)

Methods are described for making nanostructures that are mechanically, chemically and thermally stable at desired elevated temperatures, from nanostructure templates having a stability temperature that is less than the desired elevated temperature. The methods comprise depositing by atomic layer deposition (ALD) structural layers that are stable at the desired elevated temperatures, onto a template employing a graded temperature deposition scheme. At least one structural layer is deposited at an initial temperature that is less than or equal to the stability temperature of the template, and subsequent depositions made at incrementally increased deposition temperatures until the desired elevated temperature stability is achieved. Nanostructure templates include three dimensional (3D) polymeric templates having features on the order of 100 nm fabricated by proximity field nanopatterning (PnP) methods.

Grubbs, Robert K. (Albuquerque, NM); Bogart, Gregory R. (Corrales, NM); Rogers, John A. (Champaign, IL)

2011-12-20T23:59:59.000Z

314

Dissipative expansion chambers with two concentric layers of fibrous material  

Science Journals Connector (OSTI)

The acoustic performance of a dissipative expansion chamber lined with two concentric, annular layers of fibrous material with different resistances is investigated. A two-dimensional analytical approach is used to determine the transmission loss of this dissipative silencer. From the boundary conditions at the rigid wall, and the interfaces between the fibre layers and the central airway, the characteristic function and thus eigenvalues and eigenfunctions for sound propagation in the dissipative chamber are obtained, leading to transmission loss through application of pressure and velocity matching. The effects of geometry and fibre properties on the acoustic attenuation are also discussed.

A. Selamet; M.B. Xu; I.J. Lee; N.T. Huff

2005-01-01T23:59:59.000Z

315

Deposition of thin silicon layers on transferred large area graphene  

SciTech Connect

Physical vapor deposition of Si onto transferred graphene is investigated. At elevated temperatures, Si nucleates preferably on wrinkles and multilayer graphene islands. In some cases, however, Si can be quasi-selectively grown only on the monolayer graphene regions while the multilayer islands remain uncovered. Experimental insights and ab initio calculations show that variations in the removal efficiency of carbon residuals after the transfer process can be responsible for this behavior. Low-temperature Si seed layer results in improved wetting and enables homogeneous growth. This is an important step towards realization of electronic devices in which graphene is embedded between two Si layers.

Lupina, Grzegorz, E-mail: lupina@ihp-microelectronics.com; Kitzmann, Julia; Lukosius, Mindaugas; Dabrowski, Jarek; Wolff, Andre; Mehr, Wolfgang [IHP, Im Technologiepark 25, 15236 Frankfurt (Oder) (Germany)] [IHP, Im Technologiepark 25, 15236 Frankfurt (Oder) (Germany)

2013-12-23T23:59:59.000Z

316

Uranium speciation in glass corrosion layers: An XAFS study  

SciTech Connect

Uranium L{sub 3} X-ray absorption data were obtained from two borosilicate glasses, which are considered as models for radioactive wasteforms, both before and after leaching. Surface sensitivity to uranium speciation was attained by a novel application of simultaneous fluorescence and electron-yield detection. Changes in speciation are clearly discernible, from U(VI) in the bulk to (UO{sub 2}){sup 2+}-uranyl in the corrosion layer. The uranium concentrations within the corrosion layer also show variations with leaching times that can be determined from the data.

Biwer, B.M.; Soderholm, L. [Argonne National Lab., IL (United States); Greegor, R.B. [Boeing Co., Seattle, WA (United States); Lytle, F.W. [EXAFS Co., Pioche, NV (United States)

1997-12-31T23:59:59.000Z

317

E-Print Network 3.0 - acrylate-acrylic acid dry Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

2 3 4 5 > >> 1 Mechanics of Contact and Lubrication, MTM G230 Department of Mechanical & Industrial Engineering Summary: and toothpaste were changed. Afterwards samples are dried...

318

Enhanced electrochemical performance of sulfur cathode by incorporation of a thin conductive adhesion layer between the current collector and the active material layer  

Science Journals Connector (OSTI)

In the typical electrode configuration, the active material layer is directly supported on a metallic ... collector. The interface between current collector and active material layer imposes additional charge tra...

Zhian Zhang; Zhiyong Zhang; Xiwen Wang; Jie Li…

2014-05-01T23:59:59.000Z

319

Simultaneous determination of uric acid and dopamine using a carbon fiber electrode modified by layer-by-layer assembly of graphene and gold nanoparticles  

Science Journals Connector (OSTI)

A novel layer-by-layer assembly of graphene sheets and gold nanoparticles modified carbon fiber electrode (GE/Au/GE/CFE) was successfully fabricated and applied to simultaneous ... UA). The structure of GE/Au/GE/

Jiao Du; Ruirui Yue; Fangfang Ren; Zhangquan Yao; Fengxing Jiang…

2013-09-01T23:59:59.000Z

320

3812 Macromolecules 1994,27, 3812-3820 Viscoelasticity of Adsorbed Polymer Layers  

E-Print Network (OSTI)

3812 Macromolecules 1994,27, 3812-3820 Viscoelasticity of Adsorbed Polymer Layers P. Sens,' C. M with the thickness of the adsorbed layers. At a high frequency,the complex modulus increases as G = u2/3and is independentof the thickness of the polymer layers. When the adsorbed polymer layers overlap

Sens, Pierre

Note: This page contains sample records for the topic "layers uncoated acrylic" 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

Quantum Dot Light-Emitting Diode with Quantum Dots Inside the Hole Transporting Layers  

E-Print Network (OSTI)

architecture using a noninverted structure with the QDs sandwiched between hole transporting layers (HTLs

Demir, Hilmi Volkan

322

On the Effect of Porous Layers on Melting Heat Transfer in an Enclosure  

E-Print Network (OSTI)

On the Effect of Porous Layers on Melting Heat Transfer in an Enclosure E. A. Ellinger* and C. To enhance heat transfer, the porous layers are located in regions where the melting rates for a pure the porous layer and the pure fluid layer cause strong variations in heat transfer, melt convection

Beckermann, Christoph

323

Homogeneous, dual layer, solid state, thin film deposition for structural and/or electrochemical characteristics  

DOE Patents (OSTI)

Solid state, thin film, electrochemical devices (10) and methods of making the same are disclosed. An exemplary device 10 includes at least one electrode (14) and an electrolyte (16) deposited on the electrode (14). The electrolyte (16) includes at least two homogenous layers of discrete physical properties. The two homogenous layers comprise a first dense layer (15) and a second porous layer (16).

Pitts, J. Roland; Lee, Se-Hee; Tracy, C. Edwin; Li, Wenming

2014-04-08T23:59:59.000Z

324

Templating Effects on the Mineralization of Layered Inorganic Compounds:? (1) Density Functional Calculations of the Formation of Single-Layered Magnesium Hydroxide as a Brucite Model  

Science Journals Connector (OSTI)

Templating Effects on the Mineralization of Layered Inorganic Compounds:? (1) Density Functional Calculations of the Formation of Single-Layered Magnesium Hydroxide as a Brucite Model ... This work aims at understanding the formation and stability of a layered structure of brucite mineral [Mg(OH)2] via density functional calculations. ... It has been confirmed that this polymerization reaction leads spontaneously to a planar cluster, which is regarded as a part of the brucite layer. ...

Hisako Sato; Akihiro Morita; Kanta Ono; Haruyuki Nakano; Noboru Wakabayashi; Akihiko Yamagishi

2003-07-12T23:59:59.000Z

325

Upstream influence in boundary layers 45 years ago  

Science Journals Connector (OSTI)

...0) = M2 2 ikH(k); (2.19) because M(y) takes the value M2, given by equation (2.15), at the location (here rede ned as y = 0) where the inviscid boundary condition has to be satis ed. Also, at the edge y = of the boundary layer, disturbances...

2000-01-01T23:59:59.000Z

326

Surface Science Letters Structures of adsorbed water layers  

E-Print Network (OSTI)

Surface Science Letters Structures of adsorbed water layers on MgO: an ab initio study R.M. Lynden; Single crystal surfaces 1. Introduction The structure of adsorbed ®lms of water on a perfect surface. Experimentally, water is found to adsorb reversibly on a ¯at MgO surface to form a monolayer at temperatures

Alavi, Ali

327

Behavioral/Systems/Cognitive Transport of Information along Unidimensional Layered  

E-Print Network (OSTI)

of rate-code averages, it may still allow exact temporal patterns to reliably pass through the layers of Dissociated Hippocampal Neurons and Implications for Rate Coding Ofer Feinerman and Elisha Moses Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot 76100, Israel

Moses, Elisha

328

Multiple Layer Structure of Non-Abelian Vortex  

E-Print Network (OSTI)

Bogomol'nyi-Prasad-Sommerfield (BPS) vortices in U(N) gauge theories have two layers corresponding to non-Abelian and Abelian fluxes, whose widths depend nontrivially on the ratio of U(1) and SU(N) gauge couplings. We find numerically and analytically that the widths differ significantly from the Compton lengths of lightest massive particles with the appropriate quantum number.

Minoru Eto; Toshiaki Fujimori; Takayuki Nagashima; Muneto Nitta; Keisuke Ohashi; Norisuke Sakai

2009-03-09T23:59:59.000Z

329

The electric double layer has a life of its own  

E-Print Network (OSTI)

Using molecular dynamics simulations with recently developed importance sampling methods, we show that the differential capacitance of a model ionic liquid based double-layer capacitor exhibits an anomalous dependence on the applied electrical potential. Such behavior is qualitatively incompatible with standard mean-field theories of the electrical double layer, but is consistent with observations made in experiment. The anomalous response results from structural changes induced in the interfacial region of the ionic liquid as it develops a charge density to screen the charge induced on the electrode surface. These structural changes are strongly influenced by the out-of-plane layering of the electrolyte and are multifaceted, including an abrupt local ordering of the ions adsorbed in the plane of the electrode surface, reorientation of molecular ions, and the spontaneous exchange of ions between different layers of the electrolyte close to the electrode surface. The local ordering exhibits signatures of a first-order phase transition, which would indicate a singular charge-density transition in a macroscopic limit.

Céline Merlet; David T. Limmer; Mathieu Salanne; René Van Roij; Paul A Madden; David Chandler; Benjamin Rotenberg

2014-04-01T23:59:59.000Z

330

Quantum confinement in single layer a-Si:H films  

SciTech Connect

Quantum confinement effects in the transmission spectrum of thin amorphous silicon, a-Si:H, films require a coherence length comparable to the film thickness, as well as good film homogeneity. After a careful investigation, the authors conclude that there is no quantum confinement in single layer a-Si:H films at room temperature.

Koehler, S.A.; Fritzsche, H. [Univ. of Chicago, IL (United States)

1996-12-31T23:59:59.000Z

331

Carbon transport in the bottom boundary layer. Final report  

SciTech Connect

This report summarizes the activities and findings from a field experiment devised to estimate the rates and mechanisms of transport of carbon across the continental shelves. The specific site chosen for the experiment was the mid-Atlantic Bight, a region off the North Carolina coast. The experiment involved a large contingent of scientists from many institutions. The specific component of the program was the transport of carbon in the bottom boundary layer. The postulate mechanisms of transport of carbon in the bottom boundary layer are: resuspension and advection, downward deposition, and accumulation. The high turbulence levels in the bottom boundary layer require the understanding of the coupling between turbulence and bottom sediments. The specific issues addressed in the work reported here were: (a) What is the sediment response to forcing by currents and waves? (b) What is the turbulence climate in the bottom boundary layer at this site? and (c) What is the rate at which settling leads to carbon sequestering in bottom sediments at offshore sites?

Agrawal, Y.C.

1998-10-05T23:59:59.000Z

332

Shape-selective sieving layers on an oxide catalyst surface  

E-Print Network (OSTI)

Shape-selective sieving layers on an oxide catalyst surface Christian P. Canlas1 , Junling Lu2 of molecules or can modify the product selectivity (regioselectivity or enantioselectivity) of catalyst sites, and not all catalyst classes can be readily synthesized with pores of the correct dimensions. Here, we present

Mohseni, Hooman

333

Boundary layer transition as a source of noise and vibration  

Science Journals Connector (OSTI)

When laminar flow over a rigid or flexible surface becomes unstable an intermittent flow state occurs. This intermittent flow regime called the transition region is where turbulent spots are created and then grow as they convect downstream at a velocity typically equal to 0.7 times the free?stream velocity. The spots eventually coalesce to form the beginning of the fully developed turbulent boundary layer. The statistics of the velocity or pressure fluctuations in the transition region are essentially stationary in time but nonhomogeneous in the streamwise direction. Fundamentally it has been argued that this region is capable of creating monopole sound radiation e.g. Lauchle [J. Acoust. Soc. Am. 69 665–671 (1981)] and Sornette and Lagier [Acustica 55 255–267 (1984)]. Also it has been suspected that a transitional boundary layer can induce wall vibrations. These issues have been under study for some time. We have completed a set of measurements on the. space?time statistics of turbulent spots in a naturally occurring transition zone and from them developed an analytical model for the wavenumber?frequency spectrum of the pressure fluctuations. Based on this model it appears that the transition zone wall pressure is less intense than that of a fully developed turbulent layer by a factor equal approximately to the intermittency factor. This presentation will review the current research findings on wall pressure fluctuations and radiated sound caused by boundary layer transition. [Work supported by Applied Research Laboratory under NAVSEA contract.

Gerald C. Lauchle; M. A. Josserand

1986-01-01T23:59:59.000Z

334

Turbulence Structure and Wall Signature in Hypersonic Boundary Layer  

E-Print Network (OSTI)

Turbulence Structure and Wall Signature in Hypersonic Boundary Layer Yin-Chiu Kan , Beekman Izaak and low- speed features, found in subsonic experiments, are present in our supersonic and hypersonic and hypersonic regimes due to the lack of detailed flow field data, and the studies have been mostly restricted

Martín, Pino

335

MP-DSM: A Distributed Cross Layer Network Control Protocol  

E-Print Network (OSTI)

MP-DSM: A Distributed Cross Layer Network Control Protocol Daniel C. O'Neill, Yan Li, and Stephen, transmitter powers and delay. The Direct Step Method, DSM, which captures this interaction and con- trols system performance under TCP or other protocols has been described in [1]. DSM finds optimal routes

336

OFFSHORE BOUNDARY-LAYER MODELLING H. Bergstrm1  

E-Print Network (OSTI)

OFFSHORE BOUNDARY-LAYER MODELLING H. Bergström1 and R. Barthelmie2 1) Uppsala Univ., Dept. of Earth) of the ENDOW (EfficieNt Development of Offshore Windfarms) project, where the objectives are to provide currently be incorporated into a wind farm design tool. The offshore thermal stratification climate is also

337

Cellular Response to Ordered Collagen Layers on Mica  

E-Print Network (OSTI)

. . . . . . . . . . . . . . . . . . . . . . . . . 8 III RESULTS : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 10 A. Formation of 2D collagen layers . . . . . . . . . . . . . . . 10 1. Assembly of unidirectionally aligned collagen lay- ers on muscovite mica.... : : : : : : : : : : : : : : : : 32 4 Early stages of collagen assembly on muscovite. : : : : : : : : : : : : 33 5 AFM topography of triangular collagen networks on phlogopite, comparing the e ects of glycine. : : : : : : : : : : : : : : : : : : : : : 34 6 E ect of K+ on collagen...

Leow, Wee Wen

2012-07-16T23:59:59.000Z

338

Thermoelectric Properties of Superlattice Materials with Variably Spaced Layers  

E-Print Network (OSTI)

Thermoelectric Properties of Superlattice Materials with Variably Spaced Layers T.D. Musho Interdisciplinary Materials Science, Vanderbilt University, Nashville, Tennessee 37212, USA D.G. Walker Department of electronic level alignment. We have investigated the thermoelectric proper- ties of VSSL structures using

Walker, D. Greg

339

Semiconducting chalcogenide buffer layer for oxide heteroepitaxy on Si,,001...  

E-Print Network (OSTI)

controlled laminar growth of a crystalline transition metal oxide on Si 001 without SiOx or silicide/or silicides at the Si/oxide interface. Subnanometer buffer layers can prevent interface reac- tions while, also enables flexible strain relief. We observe nei- ther oxide nor silicide formation at the buried Si

Olmstead, Marjorie

340

Development of Highly Selective Oxidation Catalysts by Atomic Layer Deposition  

Energy.gov (U.S. Department of Energy (DOE))

This factsheet describes a research project whose goal is to use Atomic Layer Deposition to construct nanostructured catalysts to improve the effectiveness of oxidative dehydrogenation of alkanes. More effective catalysts could enable higher specific conversion rates and result in drastic energy savings - up to 25 trillion Btu per year by 2020.

Note: This page contains sample records for the topic "layers uncoated acrylic" 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

Electrical Contacts to Molecular Layers by Nanotransfer Printing  

E-Print Network (OSTI)

Electrical Contacts to Molecular Layers by Nanotransfer Printing Yueh-Lin Loo, David V. Lang, John of electrical contact. Results show that the nTP method produces superior devices in which the electrical for making electrical contacts in molecular electronics. Organic molecules whose electronic properties can

Rogers, John A.

342

WHAT'S GRAPHENE? Mono or few layers of sp2 bonded  

E-Print Network (OSTI)

WHAT'S GRAPHENE? · Mono or few layers of sp2 bonded carbon atoms in a honeycomb lattice 105cm2/Vs at RT. 1 Due to its unique transport properties, graphene is suitable for implementation sampling (EOS) timeresolved spectroscopy to optically pump and THz probe exfoliated graphene ribbons (GR

Mellor-Crummey, John

343

Gaussian beams in inhomogeneous anisotropic layered structures using dynamic  

E-Print Network (OSTI)

Gaussian beams in inhomogeneous anisotropic layered structures using dynamic ray tracing 31 Praha 4, Czech Republic. E-mail: ip@ig.cas.cz. Summary Gaussian beams, approximate solutions coordinates. This 3 Ã? 3 matrix simplifies considerably the computation of Gaussian beams at any paraxial

Cerveny, Vlastislav

344

UNIVERSITY of CALIFORNIA ATOMIC LAYER DEPOSITION OF ALUMINUM OXIDE  

E-Print Network (OSTI)

UNIVERSITY of CALIFORNIA SANTA CRUZ ATOMIC LAYER DEPOSITION OF ALUMINUM OXIDE A thesis submitted deposition (ALD) of aluminum oxide on crystalline silicon and anodized aluminum substrates. A homemade ALD system is used with trimethylaluminum (TMA) and water as precursors to deposit uniform aluminum oxide

Belanger, David P.

345

Biocompatibility of atomic layer-deposited alumina thin films  

E-Print Network (OSTI)

. These results sug- gest that patterning a substrate with hydrophilic and hydro- phobic groups can control cell and excellent dielectric properties for bio- micro electro mechanical systems (Bio-MEMS) in sensors, actuators of atomic layer-deposited (ALD) alumina (Al2O3) and hydro- phobic coatings. While these coatings

George, Steven M.

346

Attacks on Physical-layer Identification Boris Danev  

E-Print Network (OSTI)

Attacks on Physical-layer Identification Boris Danev Dept. of Comp. Science ETH Zurich 8092 Zurich, Switzerland bdanev@inf.ethz.ch Heinrich Luecken Comm. Tech. Laboratory ETH Zurich 8092 Zurich, Switzerland lueckenh@nari.ee.ethz.ch Srdjan Capkun Dept. of Comp. Science ETH Zurich 8092 Zurich, Switzerland capkuns

Capkun, Srdjan

347

Atomic layer deposited protective coatings for micro-electromechanical systems$  

E-Print Network (OSTI)

Atomic layer deposited protective coatings for micro-electromechanical systems$ Nils D. Hoivika of thin-®lm materials to protect MEMS devices from electrical breakdown, mechanical wear and stiction. Electrostatic testing of the coated MEMS cantilever beams revealed that the ALD Al2O3 ®lms prevented electrical

George, Steven M.

348

Singular Layer Transmission for Continuous-Variable Quantum Key Distribution  

E-Print Network (OSTI)

We develop a singular layer transmission model for continuous-variable quantum key distribution (CVQKD). In CVQKD, the transmit information is carried by continuous-variable (CV) quantum states, particularly by Gaussian random distributed position and momentum quadratures. The reliable transmission of the quadrature components over a noisy link is a cornerstone of CVQKD protocols. The proposed singular layer uses the singular value decomposition of the Gaussian quantum channel, which yields an additional degree of freedom for the phase space transmission. This additional degree of freedom can further be exploited in a multiple-access scenario. The singular layer defines the eigenchannels of the Gaussian physical link, which can be used for the simultaneous reliable transmission of multiple user data streams. Our transmission model also includes the singular interference avoider (SIA) precoding scheme. The proposed SIA precoding scheme prevents the eigenchannel interference to reach an optimal transmission over a Gaussian link. We demonstrate the results through the adaptive multicarrier quadrature division-multiuser quadrature allocation (AMQD-MQA) CVQKD multiple-access scheme. We define the singular model of AMQD-MQA and characterize the properties of the eigenchannel interference. We propose the SIA precoding of Gaussian random quadratures and the optimal decoding at the receiver. We show a random phase space constellation scheme for the Gaussian sub-channels. The singular layer transmission provides improved simultaneous transmission rates for the users with unconditional security in a multiple-access scenario, particularly in crucial low signal-to-noise ratio regimes.

Laszlo Gyongyosi

2014-02-20T23:59:59.000Z

349

Plasma atomic layer etching using conventional plasma equipment  

SciTech Connect

The decrease in feature sizes in microelectronics fabrication will soon require plasma etching processes having atomic layer resolution. The basis of plasma atomic layer etching (PALE) is forming a layer of passivation that allows the underlying substrate material to be etched with lower activation energy than in the absence of the passivation. The subsequent removal of the passivation with carefully tailored activation energy then removes a single layer of the underlying material. If these goals are met, the process is self-limiting. A challenge of PALE is the high cost of specialized equipment and slow processing speed. In this work, results from a computational investigation of PALE will be discussed with the goal of demonstrating the potential of using conventional plasma etching equipment having acceptable processing speeds. Results will be discussed using inductively coupled and magnetically enhanced capacitively coupled plasmas in which nonsinusoidal waveforms are used to regulate ion energies to optimize the passivation and etch steps. This strategy may also enable the use of a single gas mixture, as opposed to changing gas mixtures between steps.

Agarwal, Ankur; Kushner, Mark J. [Department of Chemical and Biomolecular Engineering, University of Illinois, 600 S. Mathews Ave., Urbana, Illinois 61801 (United States); Department of Electrical Engineering and Computer Science, University of Michigan, 1301 Beal Ave., Ann Arbor, Michigan 48109-2122 (United States)

2009-01-15T23:59:59.000Z

350

Mass transfer model for two-layer TBP oxidation reactions: Revision 1  

SciTech Connect

To prove that two-layer, TBP-nitric acid mixtures can be safely stored in the Canyon evaporators, it must be demonstrated that a runaway reaction between TBP and nitric acid will not occur. Previous bench-scale experiments showed that, at typical evaporator temperatures, this reaction is endothermic and therefore cannot run away, due to the loss of heat from evaporation of water in the organic layer. However, the reaction would be exothermic and could run away if the small amount of water in the organic layer evaporates before the nitric acid in this layer is consumed by the reaction. Provided that there is enough water in the aqueous layer, this would occur if the organic layer is sufficiently thick so that the rate of loss of water by evaporation exceeds the rate of replenishment due to mixing with the aqueous layer. Bubbles containing reaction products enhance the rate of transfer of water from the aqueous layer to the organic layer. These bubbles are generated by the oxidation of TBP and its reaction products in the organic layer and by the oxidation of butanol in the aqueous layer. Butanol is formed by the hydrolysis of TBP in the organic layer. For aqueous-layer bubbling to occur, butanol must transfer into the aqueous layer. Consequently, the rate of oxidation and bubble generation in the aqueous layer strongly depends on the rate of transfer of butanol from the organic to the aqueous layer. This report presents measurements of mass transfer rates for the mixing of water and butanol in two-layer, TBP-aqueous mixtures, where the top layer is primarily TBP and the bottom layer is comprised of water or aqueous salt solution. Mass transfer coefficients are derived for use in the modeling of two-layer TBP-nitric acid oxidation experiments.

Laurinat, J.E.

1994-11-04T23:59:59.000Z

351

Layered Pseudo-Steady-State Models for tight commingled gas reservoirs  

E-Print Network (OSTI)

Fig. 5 - Typical Production Rate Performance for a Two-Layer Commingled Reservoir with constant p?& 18 Fig. 6 - Typical Average Reservoir Pressure Performance for Two-Layer Commingled Reservoirs 19 Fig. 7 - Fetkovich Decline Curves 21 Fig. 8... ? Matching Single-Layer Rate Decline With Fetkovich Curves 23 Fig. 9 - Matching a Two-Layer Commingled Reservoir With Fetkovich Curves 24 Fig. 10 - Schematic Flow Chart of the Layered PSS Program 29 Fig. 11 - Matching the Rate for Case b (Optimization...

El-Banbi, Ahmed

1995-01-01T23:59:59.000Z

352

Highly efficient flexible inverted organic solar cells using atomic layer deposited ZnO as electron selective layer  

E-Print Network (OSTI)

advancements, the power conversion efficiency (PCE) of organic solar cells (OSCs) has been improved with PCE more than 4% was demonstrated.7 However,Cs2CO3 exhibitsdeliquescencewhichaffects severely a PCE of 3.09%.14 Hau et al. adopted spin-coated ZnO nanoparticles as the electron selective layer

353

Method of depositing multi-layer carbon-based coatings for field emission  

DOE Patents (OSTI)

A novel field emitter device for cold cathode field emission applications, comprising a multi-layer resistive carbon film. The multi-layered film of the present invention is comprised of at least two layers of a resistive carbon material, preferably amorphous-tetrahedrally coordinated carbon, such that the resistivities of adjacent layers differ. For electron emission from the surface, the preferred structure comprises a top layer having a lower resistivity than the bottom layer. For edge emitting structures, the preferred structure of the film comprises a plurality of carbon layers, wherein adjacent layers have different resistivities. Through selection of deposition conditions, including the energy of the depositing carbon species, the presence or absence of certain elements such as H, N, inert gases or boron, carbon layers having desired resistivities can be produced. Field emitters made according the present invention display improved electron emission characteristics in comparison to conventional field emitter materials.

Sullivan, John P. (Albuquerque, NM); Friedmann, Thomas A. (Albuquerque, NM)

1999-01-01T23:59:59.000Z

354

Method of depositing multi-layer carbon-based coatings for field emission  

DOE Patents (OSTI)

A novel field emitter device is disclosed for cold cathode field emission applications, comprising a multi-layer resistive carbon film. The multi-layered film of the present invention is comprised of at least two layers of a resistive carbon material, preferably amorphous-tetrahedrally coordinated carbon, such that the resistivities of adjacent layers differ. For electron emission from the surface, the preferred structure comprises a top layer having a lower resistivity than the bottom layer. For edge emitting structures, the preferred structure of the film comprises a plurality of carbon layers, wherein adjacent layers have different resistivities. Through selection of deposition conditions, including the energy of the depositing carbon species, the presence or absence of certain elements such as H, N, inert gases or boron, carbon layers having desired resistivities can be produced. Field emitters made according the present invention display improved electron emission characteristics in comparison to conventional field emitter materials. 8 figs.

Sullivan, J.P.; Friedmann, T.A.

1999-08-10T23:59:59.000Z

355

Polaron Coherence Condensation in Layered Colossal Resistive Manganites  

NLE Websites -- All DOE Office Websites (Extended Search)

Polaron Coherence Condensation Polaron Coherence Condensation in Layered Colossal Resistive Manganites Polaron Coherence Condensation in Layered Colossal Resistive Manganites Print Wednesday, 30 July 2008 00:00 Novel quantum phenomena, such as high-temperature superconductivity (HTSC) and colossal magnetoresistance (CMR), arise in certain materials where the interactions between electrons are very strong, but the mechanism driving their appearance remains a major puzzle. Now, angle-resolved photoemission findings from an international team led by researchers from Stanford University and the ALS provide the first direct spectroscopic evidence that the transition from insulator to metal in CMR manganese oxides (manganites) results from coherent "polaron condensation." The new findings also suggest that coherence-driven transitions are a generic controlling factor for novel quantum phenomena in doped transition-metal oxides.

356

Polaron Coherence Condensation in Layered Colossal Resistive Manganites  

NLE Websites -- All DOE Office Websites (Extended Search)

Polaron Coherence Condensation in Layered Colossal Resistive Manganites Print Polaron Coherence Condensation in Layered Colossal Resistive Manganites Print Novel quantum phenomena, such as high-temperature superconductivity (HTSC) and colossal magnetoresistance (CMR), arise in certain materials where the interactions between electrons are very strong, but the mechanism driving their appearance remains a major puzzle. Now, angle-resolved photoemission findings from an international team led by researchers from Stanford University and the ALS provide the first direct spectroscopic evidence that the transition from insulator to metal in CMR manganese oxides (manganites) results from coherent "polaron condensation." The new findings also suggest that coherence-driven transitions are a generic controlling factor for novel quantum phenomena in doped transition-metal oxides.

357

Vacancy-Induced Nanoscale Wire Structure in Gallium Selenide Layers  

NLE Websites -- All DOE Office Websites (Extended Search)

Vacancy-Induced Nanoscale Wire Vacancy-Induced Nanoscale Wire Structure in Gallium Selenide Layers Vacancy-Induced Nanoscale Wire Structure in Gallium Selenide Layers Print Wednesday, 21 December 2005 00:00 Low-dimensional materials have gained much attention not only because of the nonstop march toward miniaturization in the electronics industry but also for the exotic properties that are inherent in their small size. One approach for creating low-dimensional structures is to exploit the nanoscale or atomic-scale features that exist naturally in the three-dimensional (bulk) form of materials. By this means, a group from the University of Washington has demonstrated a new way of creating one-dimensional nanoscale structures (nanowires) in the compound gallium selenide. In short, ordered lines of structural vacancies in the material stimulate the growth of "one-dimensional" structures less than 1 nanometer in width.

358

Vacancy-Induced Nanoscale Wire Structure in Gallium Selenide Layers  

NLE Websites -- All DOE Office Websites (Extended Search)

Vacancy-Induced Nanoscale Wire Structure in Gallium Selenide Layers Print Vacancy-Induced Nanoscale Wire Structure in Gallium Selenide Layers Print Low-dimensional materials have gained much attention not only because of the nonstop march toward miniaturization in the electronics industry but also for the exotic properties that are inherent in their small size. One approach for creating low-dimensional structures is to exploit the nanoscale or atomic-scale features that exist naturally in the three-dimensional (bulk) form of materials. By this means, a group from the University of Washington has demonstrated a new way of creating one-dimensional nanoscale structures (nanowires) in the compound gallium selenide. In short, ordered lines of structural vacancies in the material stimulate the growth of "one-dimensional" structures less than 1 nanometer in width.

359

Vacancy-Induced Nanoscale Wire Structure in Gallium Selenide Layers  

NLE Websites -- All DOE Office Websites (Extended Search)

Vacancy-Induced Nanoscale Wire Structure in Gallium Selenide Layers Print Vacancy-Induced Nanoscale Wire Structure in Gallium Selenide Layers Print Low-dimensional materials have gained much attention not only because of the nonstop march toward miniaturization in the electronics industry but also for the exotic properties that are inherent in their small size. One approach for creating low-dimensional structures is to exploit the nanoscale or atomic-scale features that exist naturally in the three-dimensional (bulk) form of materials. By this means, a group from the University of Washington has demonstrated a new way of creating one-dimensional nanoscale structures (nanowires) in the compound gallium selenide. In short, ordered lines of structural vacancies in the material stimulate the growth of "one-dimensional" structures less than 1 nanometer in width.

360

Polaron Coherence Condensation in Layered Colossal Resistive Manganites  

NLE Websites -- All DOE Office Websites (Extended Search)

Polaron Coherence Condensation in Layered Colossal Resistive Manganites Print Polaron Coherence Condensation in Layered Colossal Resistive Manganites Print Novel quantum phenomena, such as high-temperature superconductivity (HTSC) and colossal magnetoresistance (CMR), arise in certain materials where the interactions between electrons are very strong, but the mechanism driving their appearance remains a major puzzle. Now, angle-resolved photoemission findings from an international team led by researchers from Stanford University and the ALS provide the first direct spectroscopic evidence that the transition from insulator to metal in CMR manganese oxides (manganites) results from coherent "polaron condensation." The new findings also suggest that coherence-driven transitions are a generic controlling factor for novel quantum phenomena in doped transition-metal oxides.

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361

Vacancy-Induced Nanoscale Wire Structure in Gallium Selenide Layers  

NLE Websites -- All DOE Office Websites (Extended Search)

Vacancy-Induced Nanoscale Wire Structure in Gallium Selenide Layers Print Vacancy-Induced Nanoscale Wire Structure in Gallium Selenide Layers Print Low-dimensional materials have gained much attention not only because of the nonstop march toward miniaturization in the electronics industry but also for the exotic properties that are inherent in their small size. One approach for creating low-dimensional structures is to exploit the nanoscale or atomic-scale features that exist naturally in the three-dimensional (bulk) form of materials. By this means, a group from the University of Washington has demonstrated a new way of creating one-dimensional nanoscale structures (nanowires) in the compound gallium selenide. In short, ordered lines of structural vacancies in the material stimulate the growth of "one-dimensional" structures less than 1 nanometer in width.

362

The Effect of Disorder in Superfluid Double Layer Graphene  

E-Print Network (OSTI)

We investigate the superfluid properties of disordered double layer graphene systems using the non-equilibrium Green's function (NEGF) formalism. The complexity of such a structure makes it imperative to study the effects of lattice vacancies which will inevitably arise during fabrication. We present and compare room temperature performance characteristics for both ideal and disordered bilayer graphene systems in an effort to illustrate the behavior of a Bose-Einstein Condensate in the presence of lattice defects under non-equilibrium conditions. We find that lattice vacancies spread throughout the top layer past the coherence length have a reduced effect compared to the ideal case. However, vacancies concentrated near the metal contacts within the coherence length significantly alter the interlayer superfluid transport properties.

Brian Dellabetta; Matthew J. Gilbert

2011-04-12T23:59:59.000Z

363

Single-layer graphene on silicon nitride micromembrane resonators  

SciTech Connect

Due to their low mass, high quality factor, and good optical properties, silicon nitride (SiN) micromembrane resonators are widely used in force and mass sensing applications, particularly in optomechanics. The metallization of such membranes would enable an electronic integration with the prospect for exciting new devices, such as optoelectromechanical transducers. Here, we add a single-layer graphene on SiN micromembranes and compare electromechanical coupling and mechanical properties to bare dielectric membranes and to membranes metallized with an aluminium layer. The electrostatic coupling of graphene covered membranes is found to be equal to a perfectly conductive membrane, without significantly adding mass, decreasing the superior mechanical quality factor or affecting the optical properties of pure SiN micromembranes. The concept of graphene-SiN resonators allows a broad range of new experiments both in applied physics and fundamental basic research, e.g., for the mechanical, electrical, or optical characterization of graphene.

Schmid, Silvan; Guillermo Villanueva, Luis; Amato, Bartolo; Boisen, Anja [Department of Micro- and Nanotechnology, Technical University of Denmark, DTU Nanotech, Building 345 East, 2800 Kongens Lyngby (Denmark); Bagci, Tolga; Zeuthen, Emil; Sørensen, Anders S.; Usami, Koji; Polzik, Eugene S. [QUANTOP, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen (Denmark); Taylor, Jacob M. [Joint Quantum Institute/NIST, College Park, Maryland 20899 (United States); Herring, Patrick K.; Cassidy, Maja C. [School of Engineering and Applied Science, Harvard University, Cambridge, Massachusetts 02138 (United States); Marcus, Charles M. [Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen (Denmark); Cheol Shin, Yong; Kong, Jing [Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

2014-02-07T23:59:59.000Z

364

Adhesion layer for etching of tracks in nuclear trackable materials  

DOE Patents (OSTI)

A method for forming nuclear tracks having a width on the order of 100-200 nm in nuclear trackable materials, such as polycarbonate (LEXAN) without causing delamination of the LEXAN. The method utilizes an adhesion film having a inert oxide which allows the track to be sufficiently widened to >200 nm without delamination of the nuclear trackable materials. The adhesion film may be composed of a metal such as Cr, Ni, Au, Pt, or Ti, or composed of a dielectric having a stable surface, such as silicon dioxide (SiO.sub.2), silicon nitride (SiN.sub.x), and aluminum oxide (AlO). The adhesion film can either be deposited on top of the gate metal layer, or if the properties of the adhesion film are adequate, it can be used as the gate layer. Deposition of the adhesion film is achieved by standard techniques, such as sputtering or evaporation.

Morse, Jeffrey D. (Martinez, CA); Contolini, Robert J. (Lake Oswego, OR)

2001-01-01T23:59:59.000Z

365

Multi-Layer Inkjet Printed Contacts to Si  

SciTech Connect

Ag, Cu, and Ni metallizations were inkjet printed with near vacuum deposition quality. The approach developed can be easily extended to other conductors such as Pt, Pd, Au, etc. Thick highly conducting lines of Ag and Cu demonstrating good adhesion to glass, Si, and printed circuit board (PCB) have been printed at 100-200 deg C in air and N2 respectively. Ag grids were inkjet-printed on Si solar cells and fired through the silicon nitride AR layer at 850 deg C, resulting in 8% cells. Next generation inks, including an ink that etches silicon nitride, have now been developed. Multi-layer inkjet printing of the etching ink followed by Ag ink produced contacts under milder conditions and gave solar cells with efficiencies as high as 12%.

Curtis, C. J.; van Hest, M.; Miedaner, A.; Kaydanova, T.; Smith, L.; Ginley, D. S.

2005-11-01T23:59:59.000Z

366

Multi-layer electrode for high contrast electrochromic devices  

DOE Patents (OSTI)

An electrochromic device includes a first substrate spaced from a second substrate. A first transparent conductive electrode is formed over at least a portion of the first substrate. A polymeric anode is formed over at least a portion of the first conductive electrode. A second transparent conductive electrode is formed over at least a portion of the second substrate. In one aspect of the invention, a multi-layer polymeric cathode is formed over at least a portion of the second conductive electrode. In one non-limiting embodiment, the multi-layer cathode includes a first cathodically coloring polymer formed over at least a portion of the second conductive electrode and a second cathodically coloring polymer formed over at least a portion of the first cathodically coloring polymer. An ionic liquid is positioned between the anode and the cathode.

Schwendeman, Irina G. (Wexford, PA); Finley, James J. (Pittsburgh, PA); Polcyn, Adam D. (Pittsburgh, PA); Boykin, Cheri M. (Wexford, PA)

2011-11-01T23:59:59.000Z

367

Characterization of few-layered graphene grown by carbon implantation  

SciTech Connect

Graphene is considered to be a very promising material for applications in nanotechnology. The properties of graphene are strongly dependent on defects that occur during growth and processing. These defects can be either detrimental or beneficial to device performance depending on defect type, location and device application. Here we present experimental results on formation of few-layered graphene by carbon ion implantation into nickel films and characteristics of graphene devices formed by graphene transfer and lithographic patterning. Micro-Raman spectroscopy was used to determine the number of graphene layers formed and identify defects arising from the device processing. The graphene films were cleaned by annealing in vacuum. Transport properties of cleaned graphene films were investigated by fabrication of back-gated field-effect transistors, which exhibited high hole and electron mobility of 1935 and 1905 cm2/Vs, respectively.

Lee, Kin Kiong; McCallum, Jeffrey C.; Jamieson, David N. [Centre for Quantum Computation and Communication Technology, School of Physics, The University of Melbourne, Parkville, Victoria 3010 (Australia)

2014-02-21T23:59:59.000Z

368

Polaron Coherence Condensation in Layered Colossal Resistive Manganites  

NLE Websites -- All DOE Office Websites (Extended Search)

Polaron Coherence Condensation in Layered Colossal Resistive Manganites Print Polaron Coherence Condensation in Layered Colossal Resistive Manganites Print Novel quantum phenomena, such as high-temperature superconductivity (HTSC) and colossal magnetoresistance (CMR), arise in certain materials where the interactions between electrons are very strong, but the mechanism driving their appearance remains a major puzzle. Now, angle-resolved photoemission findings from an international team led by researchers from Stanford University and the ALS provide the first direct spectroscopic evidence that the transition from insulator to metal in CMR manganese oxides (manganites) results from coherent "polaron condensation." The new findings also suggest that coherence-driven transitions are a generic controlling factor for novel quantum phenomena in doped transition-metal oxides.

369

Teaching themes Entry of viruses into cells: receptor binding, structural basis of the entry process and uncoating.  

E-Print Network (OSTI)

important human and animal diseases are caused by RNA viruses - Influenza, Measles, SARS, Ebola, Polio Nadurelia capensis virus MS25CCMV Influenza virus Ebola virusMeasles virus SARS virus calicviruses dengue

Brierley, Andrew

370

Intermediate layers in the a-Si:H growth processes  

SciTech Connect

The intermediate layers (IL) exist at the boundary between liquid (plasma, gas) and solid phases during production processes of a-Si:H. The IL properties differ from the properties of the boundary regions anomaly. The substance in IL is in a strong nonequilibrium state of the bifurcation or the cascade of bifurcations. The processes in the IL determine the properties and the structure of the material being produced.

Aivazov, A.A.; Bodyagin, N.V. [Moscow Inst. of Electronic Technology (Russian Federation); Vikhrov, S.P. [Radiotechnical Academy, Ryazan (Russian Federation). CR Faculty

1996-12-31T23:59:59.000Z

371

Method for producing high quality thin layer films on substrates  

DOE Patents (OSTI)

A method for producing high quality, thin layer films of inorganic compounds upon the surface of a substrate is disclosed. The method involves condensing a mixture of preselected molecular precursors on the surface of a substrate and subsequently inducing the formation of reactive species using high energy photon or charged particle irradiation. The reactive species react with one another to produce a film of the desired compound upon the surface of the substrate.

Strongin, Myron (Center Moriches, NY); Ruckman, Mark (Middle Island, NY); Strongin, Daniel (Port Jefferson, NY)

1994-01-01T23:59:59.000Z

372

Method for producing high quality thin layer films on substrates  

DOE Patents (OSTI)

A method for producing high quality, thin layer films of inorganic compounds upon the surface of a substrate is disclosed. The method involves condensing a mixture of preselected molecular precursors on the surface of a substrate and subsequently inducing the formation of reactive species using high energy photon or charged particle irradiation. The reactive species react with one another to produce a film of the desired compound upon the surface of the substrate. 4 figures.

Strongin, M.; Ruckman, M.; Strongin, D.

1994-04-26T23:59:59.000Z

373

Distributed boundary layer suction utilizing wing tip effects  

E-Print Network (OSTI)

that this is not the case. The rotational force at the tip accounts for the suction power. Since this power is utilized to suck air from the boundary, energy is dissipated, thereby weakening the vortex strength. Providing this assumption is valid, the effect would... was done. TABLE OF CONTENTS Chapter Page INTRODUCTION OBJECTIVES AND SCOPE EXPERIMENTAL FACILITY AND PROCEDURES Wing Model . Wake Rake Boundary Layer Probe . . Multiple Tube Manometers Wind Tunnel and Related Equipment Procedures Computation...

Edwards, Jay Thomas

2012-06-07T23:59:59.000Z

374

Characterization of wind noise by the boundary layer meteorology  

Science Journals Connector (OSTI)

The fluctuations in pressure generated by turbulent motions of the atmospheric boundary layer are a principal noise source in outdoor acoustic measurements. The mechanics of wind noise involve not only stagnation pressure fluctuations at the sensor but also shearing and self-interaction of turbulence throughout the flow particularly at low frequencies. The contributions of these mechanisms can be described by the boundary-layer meteorology. An experiment was conducted at the National Wind Institute's 200-meter meteorological tower located outside Lubbock Texas in the Llano Estacado region. For two days a 44-element 400-meter diameter array of unscreened NCPA-UMX infrasound sensors recorded wind noise continuously while the tower and a Doppler SODAR measured vertical profiles of the boundary layer. Analysis of the fluctuating pressure with the meteorological data shows that the statistical structure of wind noise depends on both mean velocity distribution and buoyant stability. The root-mean-square pressure exhibits distinct scalings for stable and unstable stratification. Normalization of the pressure power spectral density depends on the outer scales. In stable conditions the kurtosis of the wind noise increases with Reynolds number. Measures of noise intermittency are explored with respect to the meteorology.

2014-01-01T23:59:59.000Z

375

Quantifying 3D Reconnection in Fragmented Current Layers  

E-Print Network (OSTI)

There is growing evidence that when magnetic reconnection occurs in high Lundquist number plasmas such as in the Solar Corona or the Earth's Magnetosphere it does so within a fragmented, rather than a smooth current layer. Within the extent of these fragmented current regions the associated magnetic flux transfer and energy release occurs simultaneously in many different places. This investigation focusses on how best to quantify the rate at which reconnection occurs in such layers. An analytical theory is developed which describes the manner in which new connections form within fragmented current layers in the absence of magnetic nulls. It is shown that the collective rate at which new connections form can be characterized by two measures; a total rate which measures the true rate at which new connections are formed and a net rate which measures the net change of connection associated with the largest value of the integral of $E_{\\|}$ through all of the non-ideal regions. Two simple analytical models are pre...

Wyper, Peter F

2015-01-01T23:59:59.000Z

376

Methotrexate intercalated ZnAl-layered double hydroxide  

SciTech Connect

The anticancerous drug methotrexate (MTX) has been intercalated into an ZnAl-layered double hydroxide (LDH) using an anion exchange technique to produce LDH-MTX hybrids having particle sizes in the range of 100-300 nm. X-ray diffraction studies revealed increases in the basal spacings of ZnAl-LDH-MTX hybrid on MTX intercalation. This was corroborated by the transmission electron micrographs, which showed an increase in average interlayer spacing from 8.9 A in pristine LDH to 21.3 A in LDH-MTX hybrid. Thermogravimetric analyses showed an increase in the decomposition temperature for the MTX molecule in the LDH-MTX hybrid indicating enhanced thermal stability of the drug molecule in the LDH nanovehicle. The cumulative release profile of MTX from ZnAl-LDH-MTX hybrids in phosphate buffer saline (PBS) at pH 7.4 was successfully sustained for 48 h following Rigter-Peppas model release kinetics via diffusion. - Graphical abstract: ZnAl-layered double hydroxide intercalated with methotrexate ({approx}34% loading) promises the possibility of use of ZnAl-LDH material as drug carrier and in controlled delivery. Highlights: > ZnAl-layered double hydroxide methotrexate nanohybrid has been synthesized. > XRD and TEM studies on nanohybrid revealed successful intercalation of methotrexate. > TG and CHN analyses showed {approx}34 wt% of methotrexate loading into the nanohybrid. > Possibility of use of ZnAl-LDH material as drug carrier and in delivery.

Chakraborty, Manjusha; Dasgupta, Sudip; Soundrapandian, Chidambaram [Central Glass and Ceramic Research Institute, CSIR, 196 Raja S.C. Mullick Road, Kolkata 700032 (India); Chakraborty, Jui, E-mail: jui@cgcri.res.in [Central Glass and Ceramic Research Institute, CSIR, 196 Raja S.C. Mullick Road, Kolkata 700032 (India); Ghosh, Swapankumar, E-mail: swapankumar.ghosh2@mail.dcu.ie [National Institute for Interdisciplinary Science and Technology (NIIST), CSIR, Trivandrum 695019 (India); Mitra, Manoj K. [Department of Metallurgical and Materials Engineering, Jadavpur University, Kolkata 700032 (India); Basu, Debabrata [Central Glass and Ceramic Research Institute, CSIR, 196 Raja S.C. Mullick Road, Kolkata 700032 (India)

2011-09-15T23:59:59.000Z

377

Oil shale ash-layer thickness and char combustion kinetics  

SciTech Connect

A Hot-Recycled-Solids (HRS) oil shale retort is being studied at Lawrence Livermore National Laboratory. In the HRS process, raw shale is heated by mixing it with burnt retorted shale. Retorted shale is oil shale which has been heated in an oxygen deficient atmosphere to pyrolyze organic carbon, as kerogen into oil, gas, and a nonvolatile carbon rich residue, char. In the HRS retort process, the char in the spent shale is subsequently exposed to an oxygen environment. Some of the char, starting on the outer surface of the shale particle, is burned, liberating heat. In the HRS retort, the endothermic pyrolysis step is supported by heat from the exothermic char combustion step. The rate of char combustion is controlled by three resistances; the resistance of oxygen mass transfer through the gas film surrounding the solid particle, resistance to mass transfer through a ash layer which forms on the outside of the solid particles as the char is oxidized and the resistance due to the intrinsic chemical reaction rate of char and oxygen. In order to estimate the rate of combustion of the char in a typical oil shale particle, each of these resistances must be accurately estimated. We begin by modeling the influence of ash layer thickness on the over all combustion rate of oil shale char. We then present our experimental measurements of the ash layer thickness of oil shale which has been processed in the HRS retort.

Aldis, D.F.; Singleton, M.F.; Watkins, B.E.; Thorsness, C.B.; Cena, R.J.

1992-04-15T23:59:59.000Z

378

Multi-dimensional Longwave Forcing of Boundary Layer Cloud Systems  

SciTech Connect

The importance of multi-dimensional (MD) longwave radiative effects on cloud dynamics is evaluated in a large eddy simulation (LES) framework employing multi-dimensional radiative transfer (Spherical Harmonics Discrete Ordinate Method —SHDOM). Simulations are performed for a case of unbroken, marine boundary layer stratocumulus and a broken field of trade cumulus. “Snapshot” calculations of MD and IPA (independent pixel approximation —1D) radiative transfer applied to LES cloud fields show that the total radiative forcing changes only slightly, although the MD effects significantly modify the spatial structure of the radiative forcing. Simulations of each cloud type employing MD and IPA radiative transfer, however, differ little. For the solid cloud case, relative to using IPA, the MD simulation exhibits a slight reduction in entrainment rate and boundary layer TKE relative to the IPA simulation. This reduction is consistent with both the slight decrease in net radiative forcing and a negative correlation between local vertical velocity and radiative forcing, which implies a damping of boundary layer eddies. Snapshot calculations of the broken cloud case suggest a slight increase in radiative cooling, though few systematic differences are noted in the interactive simulations. We attribute this result to the fact that radiative cooling is a relatively minor contribution to the total energetics. For the cloud systems in this study, the use of IPA longwave radiative transfer is sufficiently accurate to capture the dynamical behavior of BL clouds. Further investigations are required in order to generalize this conclusion for other cloud types and longer time integrations. 1

Mechem, David B.; Kogan, Y. L.; Ovtchinnikov, Mikhail; Davis, Anthony B; Evans, K. F.; Ellingson, Robert G.

2008-12-20T23:59:59.000Z

379

Ni-Pt Silicide Formation Through Ti Mediating Layers  

SciTech Connect

With Ni1-xPtxSi, the variation in queue time between the final surface cleaning and Ni-Pt deposition represents a significant manufacturability issue. A short queue time is often difficult to maintain, leading to the formation of an oxide layer on the Si substrate prior to Ni-Pt deposition that can affect the formation of Ni1-xPtxSi and its texture. In this manuscript, it will be shown that an extended queue time prior to Ni-Pt deposition leads to morphological changes in the Ni1-xPtxSi formation sequence. A layer of Ti deposited between Ni-Pt and Si reduces the native oxide and may facilitate Ni1-xPtxSi formation. With increasing Ti thickness, the presence of metal-rich phases is gradually reduced and the formation temperature of Ni1-xPtxSi increases, suggesting a direct formation of Ni1-xPtxSi from Ni-Pt. In the presence of an interfacial oxide, an increase in formation temperature is also observed with increasing Ti interlayer thickness. When the Ti layer is sufficiently thick, the phase formation sequence becomes relatively insensitive to the presence of an interfacial oxide or extended queue time.

Besser,P.; Lavoie, C.; Ozcan, A.; Murray, C.; Strane, J.; Wong, K.; Gribelyuk, M.; Wang, Y.; Parks, C.; Jordan-Sweet, J.

2007-01-01T23:59:59.000Z

380

Improving Subtropical Boundary Layer Cloudiness in the 2011 NCEP GFS  

SciTech Connect

The current operational version of National Centers for Environmental Prediction (NCEP) Global Forecasting System (GFS) shows significant low cloud bias. These biases also appear in the Coupled Forecast System (CFS), which is developed from the GFS. These low cloud biases degrade seasonal and longer climate forecasts, particularly of short-wave cloud radiative forcing, and affect predicted sea surface temperature. Reducing this bias in the GFS will aid the development of future CFS versions and contributes to NCEP's goal of unified weather and climate modelling. Changes are made to the shallow convection and planetary boundary layer parameterisations to make them more consistent with current knowledge of these processes and to reduce the low cloud bias. These changes are tested in a single-column version of GFS and in global simulations with GFS coupled to a dynamical ocean model. In the single-column model, we focus on changing parameters that set the following: the strength of shallow cumulus lateral entrainment, the conversion of updraught liquid water to precipitation and grid-scale condensate, shallow cumulus cloud top, and the effect of shallow convection in stratocumulus environments. Results show that these changes improve the single-column simulations when compared to large eddy simulations, in particular through decreasing the precipitation efficiency of boundary layer clouds. These changes, combined with a few other model improvements, also reduce boundary layer cloud and albedo biases in global coupled simulations.

Fletcher, J. K.; Bretherton, Christopher S.; Xiao, Heng; Sun, Ruiyu N.; Han, J.

2014-09-23T23:59:59.000Z

Note: This page contains sample records for the topic "layers uncoated acrylic" 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

Scaling the Water Percolation in PEM Fuel Cell Porous Transport Layers  

Science Journals Connector (OSTI)

A typical polymer electrolyte membrane fuel cell (PEMFC) consist of a series of non?wetting porous layers comprised between the bipolar plates: the porous transport anode and cathode layers with their catalyst layer and the proton exchange membrane. The cathode porous transport layer (PTL) also known as gas diffusion layer has the dual role of facilitating the access of the reactants to the catalyst layer while removing the generated water. Water percolation through the PTL will evolve on one of the drainage flow patterns (either capillary fingering or stable displacement) depending on the injection flow rate.

E. F. Medici; J. S. Allen

2010-01-01T23:59:59.000Z

382

Photovoltaic Device Including A Boron Doping Profile In An I-Type Layer  

DOE Patents (OSTI)

A photovoltaic cell for use in a single junction or multijunction photovoltaic device, which includes a p-type layer of a semiconductor compound including silicon, an i-type layer of an amorphous semiconductor compound including silicon, and an n-type layer of a semiconductor compound including silicon formed on the i-type layer. The i-type layer including an undoped first sublayer formed on the p-type layer, and a boron-doped second sublayer formed on the first sublayer.

Yang, Liyou (Lawrenceville, NJ)

1993-10-26T23:59:59.000Z

383

In situ heat treatment from multiple layers of a tar sands formation  

DOE Patents (OSTI)

A method for treating a tar sands formation is disclosed. The method includes providing a drive fluid to a first hydrocarbon containing layer of the formation to mobilize at least some hydrocarbons in the first layer. At least some of the mobilized hydrocarbons are allowed to flow into a second hydrocarbon containing layer of the formation. Heat is provided to the second layer from one or more heaters located in the second layer. At least some hydrocarbons are produced from the second layer of the formation.

Vinegar, Harold J. (Bellaire, TX)

2010-11-30T23:59:59.000Z

384

Radio-transparent multi-layer insulation for radiowave receivers  

SciTech Connect

In the field of radiowave detection, enlarging the receiver aperture to enhance the amount of light detected is essential for greater scientific achievements. One challenge in using radio transmittable apertures is keeping the detectors cool. This is because transparency to thermal radiation above the radio frequency range increases the thermal load. In shielding from thermal radiation, a general strategy is to install thermal filters in the light path between aperture and detectors. However, there is difficulty in fabricating metal mesh filters of large diameters. It is also difficult to maintain large diameter absorptive-type filters in cold because of their limited thermal conductance. A technology that maintains cold conditions while allowing larger apertures has been long-awaited. We propose radio-transparent multi-layer insulation (RT-MLI) composed from a set of stacked insulating layers. The insulator is transparent to radio frequencies, but not transparent to infrared radiation. The basic idea for cooling is similar to conventional multi-layer insulation. It leads to a reduction in thermal radiation while maintaining a uniform surface temperature. The advantage of this technique over other filter types is that no thermal links are required. As insulator material, we used foamed polystyrene; its low index of refraction makes an anti-reflection coating unnecessary. We measured the basic performance of RT-MLI to confirm that thermal loads are lowered with more layers. We also confirmed that our RT-MLI has high transmittance to radiowaves, but blocks infrared radiation. For example, RT-MLI with 12 layers has a transmittance greater than 95% (lower than 1%) below 200 GHz (above 4 THz). We demonstrated its effects in a system with absorptive-type filters, where aperture diameters were 200 mm. Low temperatures were successfully maintained for the filters. We conclude that this technology significantly enhances the cooling of radiowave receivers, and is particularly suitable for large-aperture systems. This technology is expected to be applicable to various fields, including radio astronomy, geo-environmental assessment, and radar systems.

Choi, J. [Korea University, Anam-dong Seongbuk-gu, Seoul 136-713 (Korea, Republic of)] [Korea University, Anam-dong Seongbuk-gu, Seoul 136-713 (Korea, Republic of); Ishitsuka, H. [Department of Particle and Nuclear Physics, School of High Energy Accelerator Science, The Graduate University for Advanced Studies (SOKENDAI), Shonan Village, Hayama, Kanagawa 240-0193 (Japan)] [Department of Particle and Nuclear Physics, School of High Energy Accelerator Science, The Graduate University for Advanced Studies (SOKENDAI), Shonan Village, Hayama, Kanagawa 240-0193 (Japan); Mima, S. [Terahertz Sensing and Imaging Team, Terahertz-wave Research Group, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan)] [Terahertz Sensing and Imaging Team, Terahertz-wave Research Group, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan); Oguri, S., E-mail: shugo@post.kek.jp [Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Oho, Tsukuba, Ibaraki 305-0801 (Japan); Takahashi, K. [Terahertz Sensing and Imaging Team, Terahertz-wave Research Group, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan) [Terahertz Sensing and Imaging Team, Terahertz-wave Research Group, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan); Department of Physics, Tohoku University, Sendai, Miyagi 980-8578 (Japan); Tajima, O. [Department of Particle and Nuclear Physics, School of High Energy Accelerator Science, The Graduate University for Advanced Studies (SOKENDAI), Shonan Village, Hayama, Kanagawa 240-0193 (Japan) [Department of Particle and Nuclear Physics, School of High Energy Accelerator Science, The Graduate University for Advanced Studies (SOKENDAI), Shonan Village, Hayama, Kanagawa 240-0193 (Japan); Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Oho, Tsukuba, Ibaraki 305-0801 (Japan)

2013-11-15T23:59:59.000Z

385

General Insights into Structural Evolution of Layered Double Hydroxide: Underlying Aspects in Topochemical Transformation from Brucite to Layered Double Hydroxide  

Science Journals Connector (OSTI)

General Insights into Structural Evolution of Layered Double Hydroxide: Underlying Aspects in Topochemical Transformation from Brucite to Layered Double Hydroxide ... The topochemical transformation from transition-metal brucite hydroxide (Co1-xFex(OH)2, Co(OH)2, Co1-xNix(OH)2) to corresponding (Co2+–(Co3+)–Fe3+, Co2+–(Ni2+)–Co3+) LDH under oxidizing halogen agents (iodine, bromine) exhibits different staging phenomena depending on the metallic composition/ratio in starting brucite. ... A plausible charge hopping mechanism based on valence interchange between redoxable charge center (Fe3+/Co3+) and neighboring divalent sites in the host sheet is proposed to understand the restoration of electron donor sites at the interface between brucite crystallites and halogen agents, which ensures a continual oxidative reaction, and a staged intercalation/diffusion of in situ reduced halide anions into the interlayer gallery commensurate with the host charge propagation. ...

Renzhi Ma; Jianbo Liang; Xiaohe Liu; Takayoshi Sasaki

2012-11-08T23:59:59.000Z

386

Control System For Cryogenic THD Layering At The National Ignition Facility  

SciTech Connect

The National Ignition Facility (NIF) is the world largest and most energetic laser system for Inertial Confinement Fusion (ICF). In 2010, NIF began ignition experiments using cryogenically cooled targets containing layers of the tritium-hydrogen-deuterium (THD) fuel. The 75 {micro}m thick layer is formed inside of the 2 mm target capsule at temperatures of approximately 18 K. The ICF target designs require sub-micron smoothness of the THD ice layers. Formation of such layers is still an active research area, requiring a flexible control system capable of executing the evolving layering protocols. This task is performed by the Cryogenic Target Subsystem (CTS) of the NIF Integrated Computer Control System (ICCS). The CTS provides cryogenic temperature control with the 1 mK resolution required for beta-layering and for the thermal gradient fill of the capsule. The CTS also includes a 3-axis x-ray radiography engine for phase contrast imaging of the ice layers inside of the plastic and beryllium capsules. In addition to automatic control engines, CTS is integrated with the Matlab interactive programming environment to allow flexibility in experimental layering protocols. The CTS Layering Matlab Toolbox provides the tools for layer image analysis, system characterization and cryogenic control. The CTS Layering Report tool generates qualification metrics of the layers, such as concentricity of the layer and roughness of the growth boundary grooves. The CTS activities are automatically coordinated with other NIF controls in the carefully orchestrated NIF Shot Sequence.

Fedorov, M; Blubaugh, J; Edwards, O; Mauvais, M; Sanchez, R; Wilson, B

2011-03-18T23:59:59.000Z

387

A study on full color organic light emitting diodes with blue common layer under the patterned emission layer  

Science Journals Connector (OSTI)

Abstract Color patterning steps for red, green, and blue emission layers (EMLs) are crucial for the production of full color organic light-emitting diodes (OLEDs). The most common method to form individually patterned \\{EMLs\\} is to use a shadow mask as the key component for patterning. However, most pixel defects are caused by such kinds of patterning steps. Therefore, skipping certain color patterning steps could significantly improve the production yield during the fine metal masking process in the OLED fabrication. A representative example of such approach is the top blue common layer (TBCL) structure with a non-patterned BCL on top of both green and red EMLs. However, this structure could cause blue color mixing in green or red devices. To prevent this effect, we propose a newly devised bottom BCL (BBCL) structure with the BCL that is totally separated from both green and red EMLs. In particular, we utilized 1,4,5,8,9,11-hexaazatriphenylene-hexacarbonitrile interlayer (7 nm) between the underlying BCL and the hole injection layer to completely extinguish blue emission. As a result, both green and red devices with the BBCL structure showed relatively better efficiencies compared to those with the TBCL structure without any color mixing.

Hee Young Shin; Min Chul Suh

2014-01-01T23:59:59.000Z

388

E-Print Network 3.0 - atomic layer growth Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

characterizes the growth of Si1-x-yGexCx and Si1-xCx layers using a mixture of 10% disilane in hydrogen... demonstrates that fully strain compensated SiGeC layers up to at least...

389

Mathematical modelling of the catalyst layer of a polymer electrolyte fuel cell  

Science Journals Connector (OSTI)

......A. (1999) Electrochemical impedance of the cathode catalyst layer in polymer electrolyte fuel cells. J...charge transfer as well as electrochemistry in the cathode catalyst layer of a PEMFC. Master's Thesis, Virginia Polytechnic Institute......

A. A. Shah; Gwang-Soo Kim; K. Promislow

2007-06-01T23:59:59.000Z

390

Non-diffusive cross field transport in scrape-off-layer in Tokamak  

E-Print Network (OSTI)

meso- scale structures in tokamak edge plasmas,” Czech. J.Blob transport in the tokamak scrape-off-layer,” Contrib.layer/shadow regions of tokamaks and linear devices,” Phys.

Yu, Guanghui

2006-01-01T23:59:59.000Z

391

Characterization of thermo-mechanical and long-term behaviors of multi-layered composite materials  

E-Print Network (OSTI)

This study presents characterization of thermo-mechanical viscoelastic and long-term behaviors of thick-section multi-layered fiber reinforced polymer composite materials. The studied multi-layered systems belong to a class of thermo...

Nair, Aravind R.

2009-06-02T23:59:59.000Z

392

Root elongation of seedling peas through layered soil of different penetration resistances  

Science Journals Connector (OSTI)

Field soils contain localized zones of larger penetration resistance within peds and compacted layers, while ... study examined what happens to the root elongation rate when roots grew through a layer of...

A. G. Bengough; I. M. Young

1993-02-01T23:59:59.000Z

393

CO-CATALYTIC ABSORPTION LAYERS FOR CONTROLLED LASER-INDUCED CHEMICAL VAPOR DEPOSITION OF CARBON NANOTUBES  

E-Print Network (OSTI)

The concept of co-catalytic layer structures for controlled laser-induced chemical vapor deposition of carbon nanotubes is established, in which a thin Ta support layer chemically aids the initial Fe catalyst reduction. This enables a significant...

Michaelis, F.B.; Weatherup, R.S.; Bayer, B.C.; Bock, M.C.D; Sugime, H.; Caneva, S.; Robertson, J.; Baumberg, J.J.; Hofmann, S.

2014-02-24T23:59:59.000Z

394

Design of graphene sheets-supported Pt catalyst layer in PEM...  

NLE Websites -- All DOE Office Websites (Extended Search)

graphene sheets-supported Pt catalyst layer in PEM fuel cells. Design of graphene sheets-supported Pt catalyst layer in PEM fuel cells. Abstract: A series of cathodes using Pt...

395

Few-Layer Graphene as a Dry Lubricant | Argonne National Laboratory  

NLE Websites -- All DOE Office Websites (Extended Search)

Few-Layer Graphene as a Dry Lubricant Technology available for licensing: Graphene layers act as a two-dimensional nanomaterial and form a conformal protective coating on sliding...

396

Physica D 143 (2000) 169186 Surface tension-driven convection patterns in two liquid layers  

E-Print Network (OSTI)

Physica D 143 (2000) 169­186 Surface tension-driven convection patterns in two liquid layers Anne a liquid layer with a free surface is heated from below, both surface tension gradients and buoyancy may

Texas at Austin. University of

397

Numerical and experimental studies of IFE target layering in a cryogenic fluidized bed  

E-Print Network (OSTI)

layer in reactor-size cryogenic inertial fusion targets”.Harding et al. , “Forming cryogenic targets for direct-drivea solid fuel layer inside a cryogenic target for inertial

Boehm, Kurt Julian

2009-01-01T23:59:59.000Z

398

Attenuation of Electromagnetic Waves by a Plasma Layer at Atmospheric Pressure  

Science Journals Connector (OSTI)

Plasma layers at atmospheric pressure, are good broad band absorbers of ... have to be optimized. These are the plasma number density, and the thickness of the plasma layer. It is found that in order ... an effec...

Mounir Laroussi; William T. Anderson

1998-03-01T23:59:59.000Z

399

Beyond Parallax Barriers: Applying Formal Optimization Methods to Multi-Layer Automultiscopic Displays  

E-Print Network (OSTI)

with arbitrary opacities on each layer. Second, we consider general multi-layer architectures containing three. The High-Rank 3D (HR3D) display contains a stacked pair of LCD panels; rather than using heuristically

Heidrich, Wolfgang

400

Theory of first-order layering transitions in thin helium films  

E-Print Network (OSTI)

Thin liquid He-4 films on graphite show evidence of layered growth with increasing number density via a succession of first-order phase transitions. These so-called ''layering transitions'' separate uniformly covering phases, such as monolayers...

Saslow, WM; Agnolet, Glenn; Campbell, CE; Clements, BE; Krotscheck, E.

1996-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "layers uncoated acrylic" 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

E-Print Network 3.0 - atomic layer epitaxy Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

the surface of the grown MnSi layer. On the atomic scale, scanning... Epitaxial growth of silicide layers on Si substrates has attracted much attention due to their...

402

Reevaluating the Role of the Saharan Air Layer in Atlantic Tropical Cyclogenesis and Evolution  

Science Journals Connector (OSTI)

The existence of the Saharan air layer (SAL), a layer of warm, dry, dusty air frequently present over the tropical Atlantic Ocean, has long been appreciated. The nature of its impacts on hurricanes remains unclear, with some researchers arguing ...

Scott A. Braun

2010-06-01T23:59:59.000Z

403

Carbon Layers Lead the Way towards a New Generation of Metamaterials...  

NLE Websites -- All DOE Office Websites (Extended Search)

Carbon Layers Lead the Way towards a New Generation of Metamaterials Graphene - a one layer thick sheet of carbon atoms - has special properties that make it a desirable material...

404

Electrochemical studies of few-layered graphene as an anode material for Li ion batteries  

Science Journals Connector (OSTI)

Few-layered graphene (FLG) with specific surface area of only ~8.2 m2 g?1 was synthesized from graphene oxide (GO) using microwave-assisted exfoliation. GO was prepared using modified Hummers method. Few-layered ...

Shaikshavali Petnikota; Naresh K. Rotte…

2014-04-01T23:59:59.000Z

405

Advancement of Erosion Testing, Modeling, and Design of Concrete Pavement Subbase Layers  

E-Print Network (OSTI)

Concrete pavement systems have great capacity to provide long service lives; however, if the subbase layer is improperly designed or mismanaged, service life would be diminished significantly since the subbase layer performs many important roles...

Jung, Youn Su

2010-10-12T23:59:59.000Z

406

Turbulent Kinetic Energy and Its Dissipation Rate in the Equatorial Mixed Layer  

Science Journals Connector (OSTI)

The authors apply a one-dimensional mixed layer model, based on second moment closure of turbulence, to study the characteristics of turbulence in the equatorial mixed layer. In particular, they focus on characteristics such as the TKE and the ...

Carol Anne Clayson; Lakshmi H. Kantha

1999-09-01T23:59:59.000Z

407

Solid-State NMR Examination of Alteration Layers on a Nuclear...  

NLE Websites -- All DOE Office Websites (Extended Search)

Examination of Alteration Layers on a Nuclear Waste Glasses. Solid-State NMR Examination of Alteration Layers on a Nuclear Waste Glasses. Abstract: Solid-state NMR is a powerful...

408

Terrestrial magma ocean solidification and formation of a candidate D" layer  

E-Print Network (OSTI)

In this thesis we investigate the solidification of early magma oceans on the Earth and the formation of a deep dense layer at the core-mantle boundary. We also study the concentrations and densities of the last layers of ...

Springmann, Alessondra

2011-01-01T23:59:59.000Z

409

Enhancement of Solar Energy Conversion by Internal Light Randomization in Subwavelength Active Layer  

Science Journals Connector (OSTI)

Light randomization in subwavelength active layers beyond the eligibility of rays is investigated. None-the-less more than 30% current enhancement in less than 50nm thick oxide layers...

Niv, Avi; Bartal, Guy; Rothchiled, Avner

410

E-Print Network 3.0 - atmospheric layers Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

layer model Summary: an atmosphere, using the layer model, which incorporates the greenhouse effect of the atmosphere. For now... ,atm + Idown,atm Iup, ground If radiation up and...

411

Resistance effect of electric double layer on liquid flow in microchannel  

Science Journals Connector (OSTI)

Poisson-Boltzmann equation for EDL (electric double layer) and Navier-Stokes equation for liquid flows were numerically solved to investigate resistance effect of electric double layer on liquid flow in microchan...

Lei Gong ??; Jian-kang Wu Doctor ???

2006-10-01T23:59:59.000Z

412

Morphological properties of pillared layered materials investigated by electron microscopy technique  

E-Print Network (OSTI)

Scanning electron microscopy was used to investigate morphological features of a diverse range of pillared layered materials. Pillared layered zirconium phosphates, zirconium polyimine phosphonates and anion exchanger derivatives, zinc...

Navas de Mascianglioli, Margarit

2012-06-07T23:59:59.000Z

413

Multi-layered, chemically bonded lithium-ion and lithium/air batteries  

SciTech Connect

Disclosed are multilayer, porous, thin-layered lithium-ion batteries that include an inorganic separator as a thin layer that is chemically bonded to surfaces of positive and negative electrode layers. Thus, in such disclosed lithium-ion batteries, the electrodes and separator are made to form non-discrete (i.e., integral) thin layers. Also disclosed are methods of fabricating integrally connected, thin, multilayer lithium batteries including lithium-ion and lithium/air batteries.

Narula, Chaitanya Kumar; Nanda, Jagjit; Bischoff, Brian L; Bhave, Ramesh R

2014-05-13T23:59:59.000Z

414

Sensitivity analysis of flexible pavement response and AASHTO 2002 design guide for properties of unbound layers  

E-Print Network (OSTI)

different types of base materials, base layer thicknesses, hot mix asphalt type and thickness, environmental conditions, and subgrade materials....

Masad, Sanaa Ahmad

2004-09-30T23:59:59.000Z

415

Atomistic Simulation of Nanoporous Layered Double Hydroxide Materials and Transport and Adsorption of Gas  

E-Print Network (OSTI)

-packed configuration of and other anions in a positively-charged brucite-like layer. Water and various anions

Southern California, University of

416

Exciton Generation and Diffusion in Multilayered Organic Solar Cells Designed by Layer-by-Layer Assembly of Poly(p-phenylenevinylene)  

Science Journals Connector (OSTI)

Exciton Generation and Diffusion in Multilayered Organic Solar Cells Designed by Layer-by-Layer Assembly of Poly(p-phenylenevinylene) ... exciton generation; exciton diffusion; poly(p-phenylenevinylene); layer-by-layer assembly; organic solar cell ... The former solar cells are typically fabricated by solution processes such as spin coating of a blend solution of a conjugated polymer and a fullerene derivative (6) and therefore have attracted much attention because of their suitability for high-throughput production based on the printing and coating techniques (7). ...

Kohji Masuda; Yoshifumi Ikeda; Michihiro Ogawa; Hiroaki Benten; Hideo Ohkita; Shinzaburo Ito

2010-01-04T23:59:59.000Z

417

Al{sub 2}O{sub 3} multi-density layer structure as a moisture permeation barrier deposited by radio frequency remote plasma atomic layer deposition  

SciTech Connect

Al{sub 2}O{sub 3} films deposited by remote plasma atomic layer deposition have been used for thin film encapsulation of organic light emitting diode. In this study, a multi-density layer structure consisting of two Al{sub 2}O{sub 3} layers with different densities are deposited with different deposition conditions of O{sub 2} plasma reactant time. This structure improves moisture permeation barrier characteristics, as confirmed by a water vapor transmission rate (WVTR) test. The lowest WVTR of the multi-density layer structure was 4.7 × 10{sup ?5} gm{sup ?2} day{sup ?1}, which is one order of magnitude less than WVTR for the reference single-density Al{sub 2}O{sub 3} layer. This improvement is attributed to the location mismatch of paths for atmospheric gases, such as O{sub 2} and H{sub 2}O, in the film due to different densities in the layers. This mechanism is analyzed by high resolution transmission electron microscopy, elastic recoil detection, and angle resolved X-ray photoelectron spectroscopy. These results confirmed that the multi-density layer structure exhibits very good characteristics as an encapsulation layer via location mismatch of paths for H{sub 2}O and O{sub 2} between the two layers.

Jung, Hyunsoo [Division of Materials Science and Engineering, Hanyang University, Seoul 133-791 (Korea, Republic of); Samsung Display Co. Ltd., Tangjeong, Chungcheongnam-Do 336-741 (Korea, Republic of); Jeon, Heeyoung [Department of Nano-scale Semiconductor Engineering, Hanyang University, Seoul 133-791 (Korea, Republic of); Choi, Hagyoung; Ham, Giyul; Shin, Seokyoon [Division of Materials Science and Engineering, Hanyang University, Seoul 133-791 (Korea, Republic of); Jeon, Hyeongtag, E-mail: hjeon@hanyang.ac.kr [Division of Materials Science and Engineering, Hanyang University, Seoul 133-791 (Korea, Republic of); Department of Nano-scale Semiconductor Engineering, Hanyang University, Seoul 133-791 (Korea, Republic of)

2014-02-21T23:59:59.000Z

418

Asymmetric perfectly matched layer for the absorption of waves  

SciTech Connect

The Perfectly Matched Layer (PML) has become a standard for comparison in the techniques that have been developed to close the system of Maxwell equations (more generally wave equations) when simulating an open system. The original Berenger PML formulation relies on a split version of Maxwell equations with numerical electric and magnetic conductivities. They present here an extension of this formulation which introduces counterparts of the electric and magnetic conductivities affecting the term which is spatially differentiated in the equations. they phase velocity along each direction is also multiplied by an additional coefficient. They show that, under certain constraints on the additional numerical coefficients, this ''medium'' does not generate any reflection at any angle and any frequency and is then a Perfectly Matched Layer. Technically it is a super-set of Berenger's PML to which it reduces for a specific set of parameters and like it, it is anisotropic. However, unlike the PML, it introduces some asymmetry in the absorption rate and is therefore labeled an APML for Asymmetric Perfectly Matched Layer. They present here the numerical considerations that have led them to introduce such a medium as well as its theory. Several finite-different numerical implementations are derived (in one, two and three dimensions) and the performance of the APML is contrasted with that of the PML in one and two dimensions. Using plane wave analysis, they show that the APML implementations lead to higher absorption rates than the considered PML implementations. Although they have considered in this paper the finite-different discretization of Maxwell-like equations only, the APML system of equations may be used with other discretization schemes, such as finite-elements, and may be applied to other equations, for applications beyond electromagnetics.

Vay, Jean-Luc

2002-02-10T23:59:59.000Z

419

Effect of Nanoparticle Size on the Morphology of Adsorbed Surfactant Layers  

E-Print Network (OSTI)

Effect of Nanoparticle Size on the Morphology of Adsorbed Surfactant Layers Dersy Lugo, Julian (pH 9) the surfactant exists in its nonionic form and the structure of the adsorbed layer of this adsorbed layer is a prerequisite for gaining a better understanding of its mode of operation in stabilizing

Paris-Sud XI, Université de

420

Combinatorial canonical form (CCF) of a layered mixed (LM-)matrix  

E-Print Network (OSTI)

Combinatorial canonical form (CCF) of a layered mixed (LM-)matrix Kazuo Murota Layered mixed (LM F is called a layered mixed matrix (or an LM-matrix) with respect to K if it takes the following nonzero entries is algebraically independent over K. With an LM-matrix A we associate a submodular

Murota, Kazuo

Note: This page contains sample records for the topic "layers uncoated acrylic" 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

The Impacts of Physical Layer Parameters on the Connectivity of Ad-Hoc Networks  

E-Print Network (OSTI)

The Impacts of Physical Layer Parameters on the Connectivity of Ad-Hoc Networks Javad Kazemitabar,hyousefi,hamidj]@uci.edu The Impacts of Physical Layer Parameters on the Connectivity of Ad-Hoc Networks ­ p.1/20 #12;Outline Layer Parameters on the Connectivity of Ad-Hoc Networks ­ p.2/20 #12;Outline · Background Ergodic SER

Yousefi'zadeh, Homayoun

422

AIP/123-QED Fuzzy structure theory modeling of sound-insulation layers in complex  

E-Print Network (OSTI)

AIP/123-QED Fuzzy structure theory modeling of sound-insulation layers in complex vibroacoustic France (Dated: September 11, 2008) Fuzzy structure theory for sound-insulation layers 1 hal-00684495 is proposed in developing an elas- toacoustic element useful to model sound-insulation layers for compu

Paris-Sud XI, Université de

423

STOCHASTIC COMPUTATIONAL DYNAMICAL MODEL OF UNCERTAIN STRUCTURE COUPLED WITH AN INSULATION LAYER  

E-Print Network (OSTI)

STOCHASTIC COMPUTATIONAL DYNAMICAL MODEL OF UNCERTAIN STRUCTURE COUPLED WITH AN INSULATION LAYER the effect of insulation layers in complex dynamical systems for low- and medium-frequency ranges such as car booming noise analysis, one introduces a sim- plified stochastic model of insulation layers based

Boyer, Edmond

424

Response of the benthic nepheloid layer to near-inertial internal waves in southern Lake Michigan  

E-Print Network (OSTI)

resuspension by shoaling internal waves maintains the layer during the stratified period. The origin and maintenance of the benthic nepheloid layer is most likely the result of local resuspension due: Limnology; KEYWORDS: Lake Michigan, nepheloid layer, sediment resuspension, Morlet wavelet Citation: Hawley

425

Graphene growth on glass 1 Synthesis of conducting transparent few-layer graphene directly  

E-Print Network (OSTI)

Graphene growth on glass 1 Synthesis of conducting transparent few-layer graphene directly on glass major hurdles that research has to overcome to get graphene out of research laboratories. Here, using transparent graphene layers at temperatures as low as 450 °C. Our few-layer graphene grows at the interface

Paris-Sud XI, Université de

426

Adding STARFire Analysis Layers to Google Earth through a KML Network Link 1) Launch Google Earth  

E-Print Network (OSTI)

Adding STARFire Analysis Layers to Google Earth through a KML Network Link 1) Launch Google Earth 2) The network link will be added in the Places control within Google Earth. Select the node level in the tree layers for viewing within Google Earth. Double clicking on a layer will zoom you to the extent

427

RANDOM DEPOSITION MODEL OF CDS LAYER IN CDS/CDTE THINFILM SOLAR CELLS  

E-Print Network (OSTI)

THESIS RANDOM DEPOSITION MODEL OF CDS LAYER IN CDS/CDTE THIN­FILM SOLAR CELLS Submitted by Lei Chen LAYER IN CDS/CDTE THIN­FILM SOLAR CELLS BE AC- CEPTED AS FULFILLING IN PART REQUIREMENTS FOR THE DEGREE MODEL OF CDS LAYER IN CDS/CDTE THIN­FILM SOLAR CELLS Thin­film solar cells are developing dramatically

Sites, James R.

428

Numerical aperture influence on 3-D multi-layer optical data storage systems , Edwin P. Walkera  

E-Print Network (OSTI)

Numerical aperture influence on 3-D multi-layer optical data storage systems Yi Zhanga* , Edwin P storage system is analyzed. Keywords: NA, multi-layer data storage, two-photon recording, capacity) 550-0596, Fax: (858) 550-0917 #12;Numerical aperture influence on 3-D multi-layer optical data storage

Esener, Sadik C.

429

Anomalous Lattice Vibrations of Single-and Few-Layer MoS2  

E-Print Network (OSTI)

is an ingre- dient in some Li ion batteries.19 As exempli- fied by the recent studies on few-layer graphene-dimensional systems.1 Single-layer graphene, for example, exhibits many dis- tinctive physical properties not found of interlayer interactions in few-layer graphene samples have, however, been hampered by the sensitivity

430

Free magnetohydrodynamic shear layers in the presence of rotation and magnetic fielda)  

E-Print Network (OSTI)

Free magnetohydrodynamic shear layers in the presence of rotation and magnetic fielda) E. J. Spence and numerical study of hydrodynamic and magnetohydrodynamic free shear layers and their stability. We first typically reach zero velocity at the bounding wall. A shear layer is called "free" when it exists

Ji, Hantao

431

Friction of a slider on a granular layer: Nonmonotonic thickness dependence and effect of boundary conditions  

E-Print Network (OSTI)

Friction of a slider on a granular layer: Nonmonotonic thickness dependence and effect of boundary the effective friction encountered by a mass sliding on a granular layer as a function of bed thickness and boundary roughness conditions. The observed friction has minima for a small number of layers before

Kudrolli, Arshad

432

BOUNDARY LAYER (BL) THERMAL EDDIES OVER A PINE FOREST FROM CARES 2010  

E-Print Network (OSTI)

BOUNDARY LAYER (BL) THERMAL EDDIES OVER A PINE FOREST FROM CARES 2010 Gunnar Senum and Stephen are three thermal eddies, about 250 meters wide, in the boundary layer. These thermal eddies are formed from the solar heating of the surface and help to form the boundary layer. The eddy updrafts are transporting

433

Simulation of bubble migration in a turbulent boundary layer M. Mattson and K. Mahesha  

E-Print Network (OSTI)

Simulation of bubble migration in a turbulent boundary layer M. Mattson and K. Mahesha Aerospace of bubbles injected into a turbulent boundary layer. The Reynolds number of the turbulent boundary layer varies from 420 Re 1800, and the bubble Reynolds number Reb 1. Simulation parameters were chosen to match

Mahesh, Krishnan

434

PREDICTING THE FRACTURE CHARACTER OF POTENTIAL WEAK LAYERS IN PENETROMETER James Floyer1,  

E-Print Network (OSTI)

PREDICTING THE FRACTURE CHARACTER OF POTENTIAL WEAK LAYERS IN PENETROMETER SIGNALS James Floyer1 has proved to be challenging. A scheme for predicting the fracture character of potential weak layers fracture character groups is performed, potential failure layers are correctly classified 80% of the time

Jamieson, Bruce

435

A simplified model of thin layer static/flowing dynamics for granular materials with yield  

E-Print Network (OSTI)

/deposition processes when a layer of particles is flowing over a static layer or near the destabilization and arrestA simplified model of thin layer static/flowing dynamics for granular materials with yield, 75005 Paris, France, 4 ANGE team, INRIA, CETMEF, Lab. J.-L. Lions, Paris, France Abstract We introduce

Paris-Sud XI, Université de

436

A case study of boundary layer ventilation by convection and coastal processes  

E-Print Network (OSTI)

of the pollution in the atmosphere originates from emissions in the atmospheric boundary layer, the region; published 12 September 2007. [1] It is often assumed that ventilation of the atmospheric boundary layer responsible for ventilation of the atmospheric boundary layer during a nonfrontal day that occurred on 9 May

Dacre, Helen

437

Clogging Potential of Tire Shred-Drainage Layer in Landfill Cover Systems Krishna R. Reddy  

E-Print Network (OSTI)

1 Clogging Potential of Tire Shred-Drainage Layer in Landfill Cover Systems Krishna R. Reddy of shredded scrap tire drainage layers in landfill covers. Laboratory clogging tests were conducted using soil to 50 cm. The soil layer consisted of silty clay that is commonly used as cover soil in landfill cover

438

Loop Current Mixed Layer Energy Response to Hurricane Lili (2002). Part I: Observations  

E-Print Network (OSTI)

Loop Current Mixed Layer Energy Response to Hurricane Lili (2002). Part I: Observations ERIC W-dimensional oceanic energy evolution in response to Hurricane Lili's (2002) passage. Mixed layer temperature analyses, Florida (Manuscript received 4 May 2011, in final form 3 October 2011) ABSTRACT The ocean mixed layer

Miami, University of

439

Results from Point Contact Tunnelling Spectroscopy and Atomic Layer Deposition  

SciTech Connect

We have shown previously that magnetic niobium oxides can influence the superconducting density of states at the surface of cavity-grade niobium coupons. We will present recent results obtained by Point Contact Tunneling spectroscopy (PCT) on coupons removed from hot and cold spots in a niobium cavity, as well as a comparative study of magnetic oxides on mild baked/unbaked electropolished coupons. We will also describe recent results obtained from coated cavities, ALD films properties and new materials using Atomic Layer Deposition (ALD).

Proslier, Th. [Illinois Institute of Technology; Zasadzinski, J. [Illinois Institute of Technology; Ciovati, Gianluigi [JLAB; Kneisel, Peter K. [JLAB; Elam, J. W. [ANL; Norem, J. [ANL; Pellin, M. J. [ANL

2009-11-01T23:59:59.000Z

440

Static and Dynamic Viscosity of a Single Layer Dusty Plasma  

SciTech Connect

We measured the static and dynamic (complex) shear viscosity of a single layer complex plasma by applying, respectively, a stationary and a periodically modulated shear stress induced by the light pressure of manipulating laser beams. Under static conditions the shear viscosity reproduced the numerically predicted shear rate dependence, the so called shear-thinning effect. Under oscillating shear both the magnitude and the ratio of the dissipative and elastic contributions to the complex viscosity show strong frequency dependence. Accompanying molecular dynamics simulations explain and support the experimental observations.

Hartmann, Peter [Research Institute for Solid State Physics and Optics of the Hungarian Academy of Sciences, P.O.B. 49, H-1525 Budapest (Hungary); Center for Astrophysics, Space Physics and Engineering Research (CASPER), One Bear Place 97310, Baylor University, Waco, TX 76798 (United States); Sandor, Mate Cs.; Kovacs, Aniko; Donko, Zoltan [Research Institute for Solid State Physics and Optics of the Hungarian Academy of Sciences, P.O.B. 49, H-1525 Budapest (Hungary)

2011-11-29T23:59:59.000Z

Note: This page contains sample records for the topic "layers uncoated acrylic" 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

Observations of deep scattering layers in the Gulf of Mexico  

E-Print Network (OSTI)

layer (DSL), in the Gulf of Mexico, in reference to; ~ the distribution of the DSL during the past three years, ~ average and maximum rates of ascent and descent, ~ correlation between DSL motion during the total solar eclipse in March, 1970... was noted and discussed but not specifically identified as such. D. Reaction to Solar Eclipse Reported here are the results of observations of the DSL in the Gulf of Mexico during a three-day period which included the day of the total solar eclipse (TSE...

Thompson, Ronald Curtis

2012-06-07T23:59:59.000Z

442

EXAFS Determination of Cation Local Order in Layered Perovskites  

SciTech Connect

EXAFS analysis of Bi{sub 6}Ti{sub 3}Fe{sub 2}O{sub 18} Aurivillius ceramic was performed to elucidate the local environment of Fe cations. Experiments were performed at Stanford Synchrotron Radiation Laboratory, at T = 10, 30, 50, 75, 100 and 298 K, in fluorescence regime. EXAFS spectra were processed using the ab initio multiple scattering program FEFF6. Distances among representative atomic pairs were refined. As a basic result, the previous hypothesis suggested by X-ray diffraction experiments, regarding a preference of iron atoms for the centered perovskite layer of the unit cell, was confirmed.

Montero-Cabrera, M.E.; Garcia-Guaderrama, M.; Mehta, A.; Webb, S.; Fuentes-Montero, L.; Moller, J.A.D.; Fuentes-Cobas, L.; /Autonoma U., Chihuahua /SLAC, SSRL

2009-06-05T23:59:59.000Z

443

Coherent structures in compressible free-shear-layer flows  

SciTech Connect

Large scale coherent structures are intrinsic fluid mechanical characteristics of all free-shear flows, from incompressible to compressible, and laminar to fully turbulent. These quasi-periodic fluid structures, eddies of size comparable to the thickness of the shear layer, dominate the mixing process at the free-shear interface. As a result, large scale coherent structures greatly influence the operation and efficiency of many important commercial and defense technologies. Large scale coherent structures have been studied here in a research program that combines a synergistic blend of experiment, direct numerical simulation, and analysis. This report summarizes the work completed for this Sandia Laboratory-Directed Research and Development (LDRD) project.

Aeschliman, D.P.; Baty, R.S. [Sandia National Labs., Albuquerque, NM (United States). Engineering Sciences Center; Kennedy, C.A.; Chen, J.H. [Sandia National Labs., Livermore, CA (United States). Combustion and Physical Sciences Center

1997-08-01T23:59:59.000Z

444

Digital volume imaging of the PEFC gas diffusion layer  

SciTech Connect

The gas diffusion layer (GDL) plays a key role in the overall performance/durability of a polymer electrolyte fuel cell (PEFC). Of profound importance, especially in the context of water management and flooding phenomena, is the influence of the underlying pore morphology and wetting characteristics Of the GDL microstructure. In this article, we present the digital volumetric imaging (DVI) technique in order to generate the 3-D carbon paper GDL microstructure. The internal pore structure and the local microstructural variations in terms of fiber alignment and fiber/binder distributions are investigated using the several 3-D thin sections of the sample obtained from DVI.

Borup, Rodney L [Los Alamos National Laboratory; Mukundan, Rangachary [Los Alamos National Laboratory; Mukherjee, Partha [ORNL; Shim, Eunkyoung [NC ST

2010-01-01T23:59:59.000Z

445

Transition in Hypersonic Boundary Layers: Role of Dilatational Waves  

E-Print Network (OSTI)

Transition and turbulence production in a hypersonic boundary layer is investigated in a Mach 6 quiet wind tunnel using Rayleigh-scattering visualization, fast-response pressure measurements, and particle image velocimetry. It is found that the second instability acoustic mode is the key modulator of the transition process. The second mode experiences a rapid growth and a very fast annihilation due to the effect of bulk viscosity. The second mode interacts strongly with the first vorticity mode to directly promote a fast growth of the latter and leads to immediate transition to turbulence.

Zhu, Yiding; Yuan, Huijing; Wu, Jiezhi; Chen, Shiyi; Lee, Cunbiao; Gad-el-Hak, Mohamed

2015-01-01T23:59:59.000Z

446

Atomic layer deposition of W on nanoporous carbon aerogels  

Science Journals Connector (OSTI)

In this study the authors demonstrate the ability to apply precise conformal W coatings onto all surfaces of nanoporouscarbon aerogels using atomic layer deposition(ALD). The resulting material has a filamentous structure in which the W completely encapsulates the carbon aerogel strands. The material mass increases nonlinearly with W coating achieving a tenfold increase following ten ALD cycles. The aerogel surface area increases by nearly a factor of 2 after ten W ALD cycles. This conformal metalcoating of extremely high aspect ratio nanoporous materials by ALD represents a unique route to forming metal functionalized high surface area materials.

J. W. Elam; J. A. Libera; M. J. Pellin; A. V. Zinovev; J. P. Greene; J. A. Nolen

2006-01-01T23:59:59.000Z

447

Ferruginous layers in sediments from the Gulf of Mexico  

E-Print Network (OSTI)

/2 to 2 cm) bands in seven cores from the continental slope, continental rise, and Sigsbee abyssal plain, Iron, manganese, cobalt, and nickel content were determined in 132 samples from the yellow layers and surrounding sediments by Atomic... in the cores (Fig- ure 3). Often, two zones occur together, separated by only a few centi- meters of gray lutite. The enrichment of the iron-rich zones appears to be a function of dilution effects by non-ferruginous gray clays; the darker yellow, thin zones...

Watson, Jerry Allan

1968-01-01T23:59:59.000Z

448

Nonmetallic Conduction in Electron Inversion Layers at Low Temperatures  

Science Journals Connector (OSTI)

We have measured the resistance of electron inversion layers in Si metal-oxide-semiconductor field-effect transistors at low temperatures (?50 mK) and low electric fields (?0.1 V/m). At low values of R? we observe logarithmic dependences of the resistance on both temperature and applied electric field which scale only on R?. We observe a gradual transition to an exponential dependence at R??10 k?. The logarithmic dependences agree qualitatively but not quantitatively with current theories of localization.

D. J. Bishop, D. C. Tsui, and R. C. Dynes

1980-04-28T23:59:59.000Z

449

Acoustic sounding of the tropical marine boundary layer during GATE  

Science Journals Connector (OSTI)

A vertically pointed monostatic acoustic sounder was installed on the NOAA ShipOCEANOGRAPHER during the Global Atmospheric Research Program Atlantic Tropical Experiment (GATE). The sounderantenna was mounted on a gyrocontrolled platform to compensate for the ship'spitch and roll motions. Extensive measures such as mounting the antenna assembly on a vibration isolator and installing absorbing cuffs had to be taken to reduce interference by ship?generated noise. Back?scattered acoustic data obtained from up to 850 m height describe the tropical marine boundary layer in unique and hitherto unseen detail. During undisturbed weather conditions the facsimile record showed convective plumes rising from the surface of the water up to 400 m. Storm?generated disturbances resulted in a substantial modification of the boundary layer; low?level multilayered undulating inversions formed from cool outflow currents. The inversions persisted for up to 16 hours. Low?level patchy cumulus clouds produced characteristic hummock?shaped acoustic echoes. Analysis of the Doppler frequency shift of the returns allowed the determination of vertical velocities within these clouds and underlying convective plumes.

P. A. Mandics; J. E. Gaynor; F. F. Hall Jr.

1976-01-01T23:59:59.000Z

450

Fast diffusion of a graphene flake on a graphene layer  

Science Journals Connector (OSTI)

Diffusion of a graphene flake on a graphene layer is analyzed and a diffusion mechanism is proposed for the system under consideration. According to this mechanism, rotational transition of the flake from commensurate to incommensurate states takes place with subsequent simultaneous rotation and translational motion until the commensurate state is reached again, and so on. The molecular dynamics simulations and analytic estimates based on ab initio and semiempirical calculations demonstrate that the proposed diffusion mechanism is dominant at temperatures T?(1–3)Tcom, where Tcom corresponds to the barrier for transitions of the flake between adjacent energy minima in the commensurate states. For example, for the flake consisting of ?40, 200, and 700 atoms the contribution of the proposed diffusion mechanism through rotation of the flake to the incommensurate states exceeds that for diffusion of the flake in the commensurate states by one to two orders of magnitude at temperatures 50–150 K, 200–600 K, and 800–2400 K, respectively. The possibility to experimentally measure the barriers to relative motion of graphene layers based on the study of diffusion of a graphene flake is considered. The results obtained are also relevant for understanding of dynamic behavior of polycyclic aromatic molecules on graphene and should be qualitatively valid for a set of commensurate adsorbate-adsorbent systems.

Irina V. Lebedeva; Andrey A. Knizhnik; Andrey M. Popov; Olga V. Ershova; Yurii E. Lozovik; Boris V. Potapkin

2010-10-29T23:59:59.000Z

451

An asymptotic model of seismic reflection from a permeable layer  

SciTech Connect

Analysis of compression wave propagation in a poroelastic medium predicts a peak of reflection from a high-permeability layer in the low-frequency end of the spectrum. An explicit formula expresses the resonant frequency through the elastic moduli of the solid skeleton, the permeability of the reservoir rock, the fluid viscosity and compressibility, and the reservoir thickness. This result is obtained through a low-frequency asymptotic analysis of Biot's model of poroelasticity. A review of the derivation of the main equations from the Hooke's law, momentum and mass balance equations, and Darcy's law suggests an alternative new physical interpretation of some coefficients of the classical poroelasticity. The velocity of wave propagation, the attenuation factor, and the wave number, are expressed in the form of power series with respect to a small dimensionless parameter. The absolute value of this parameter is equal to the product of the kinematic reservoir fluid mobility and the wave frequency. Retaining only the leading terms of the series leads to explicit and relatively simple expressions for the reflection and transmission coefficients for a planar wave crossing an interface between two permeable media, as well as wave reflection from a thin highly-permeable layer (a lens). Practical applications of the obtained asymptotic formulae are seismic modeling, inversion, and at-tribute analysis.

Silin, D.; Goloshubin, G.

2009-10-15T23:59:59.000Z

452

Application Protocol, Initial Graphics Exchange Specification (IGES), Layered Electrical Product  

SciTech Connect

An application protocol is an information systems engineering view of a specific product The view represents an agreement on the generic activities needed to design and fabricate the product the agreement on the information needed to support those activities, and the specific constructs of a product data standard for use in transferring some or all of the information required. This application protocol describes the data for electrical and electronic products in terms of a product description standard called the Initial Graphics Exchange Specification (IGES). More specifically, the Layered Electrical Product IGES Application Protocol (AP) specifies the mechanisms for defining and exchanging computer-models and their associated data for those products which have been designed in two dimensional geometry so as to be produced as a series of layers in IGES format The AP defines the appropriateness of the data items for describing the geometry of the various parts of a product (shape and location), the connectivity, and the processing and material characteristics. Excluded is the behavioral requirements which the product was intended to satisfy, except as those requirements have been recorded as design rules or product testing requirements.

O`Connell, L.J. [ed.

1994-12-01T23:59:59.000Z

453

Plasmons in spatially separated double-layer graphene nanoribbons  

SciTech Connect

Motivated by innovative progresses in designing multi-layer graphene nanostructured materials in the laboratory, we theoretically investigate the Dirac plasmon modes of a spatially separated double-layer graphene nanoribbon system, made up of a vertically offset armchair and metallic graphene nanoribbon pair. We find striking features of the collective excitations in this novel Coulomb correlated system, where both nanoribbons are supposed to be either intrinsic (undoped/ungated) or extrinsic (doped/gated). In the former, it is shown the low-energy acoustical and the high-energy optical plasmon modes are tunable only by the inter-ribbon charge separation. In the later, the aforementioned plasmon branches are modified by the added doping factor. As a result, our model could be useful to examine the existence of a linear Landau-undamped low-energy acoustical plasmon mode tuned via the inter-ribbon charge separation as well as doping. This study might also be utilized for devising novel quantum optical waveguides based on the Coulomb coupled graphene nanoribbons.

Bagheri, Mehran, E-mail: mh-bagheri@sbu.ac.ir [Laser and Plasma Research Institute, Shahid Beheshti University, G. C., Evin, Tehran 19835-63113 (Iran, Islamic Republic of); Bahrami, Mousa [ICFO-Institut de Ciencies Fotoniques, Parc Mediterrani de la Tecnologia, 08860 Castelldefels (Barcelona) (Spain)

2014-05-07T23:59:59.000Z

454

One directional Polarized Neutron Reflectometry with optimized reference layer method  

E-Print Network (OSTI)

In the past decade, several neutron reflectometry methods for determining the modulus and phase of the complex reflection coefficient of an unknown multilayer thin film have been worked out among which the method of variation of surroundings and reference layers are of highest interest. These methods were later modified for measurement of the polarization of the reflected beam instead of the measurement of the intensities. In their new architecture, these methods not only suffered from the necessity of change of experimental setup, but also another difficulty was added to their experimental implementations. This deficiency was related to the limitations of the technology of the neutron reflectometers that could only measure the polarization of the reflected neutrons in the same direction as the polarization of the incident beam. As the instruments are limited, the theory has to be optimized so that the experiment could be performed. In a recent work, we developed the method of variation of surroundings for one directional polarization analysis. In this new work, the method of reference layer with polarization analysis has been optimized to determine the phase and modulus of the unknown film with measurement of the polarization of the reflected neutrons in the same direction as the polarization of the incident beam.

Seyed Farhad Masoudi; Saeed S. Jahromi

2012-05-17T23:59:59.000Z

455

One directional polarized neutron reflectometry with optimized reference layer method  

SciTech Connect

In the past decade, several neutron reflectometry methods for determining the modulus and phase of the complex reflection coefficient of an unknown multilayer thin film have been worked out among which the method of variation of surroundings and reference layers are of highest interest. These methods were later modified for measurement of the polarization of the reflected beam instead of the measurement of the intensities. In their new architecture, these methods not only suffered from the necessity of change of experimental setup but also another difficulty was added to their experimental implementations. This deficiency was related to the limitations of the technology of the neutron reflectometers that could only measure the polarization of the reflected neutrons in the same direction as the polarization of the incident beam. As the instruments are limited, the theory has to be optimized so that the experiment could be performed. In a recent work, we developed the method of variation of surroundings for one directional polarization analysis. In this new work, the method of reference layer with polarization analysis has been optimized to determine the phase and modulus of the unknown film with measurement of the polarization of the reflected neutrons in the same direction as the polarization of the incident beam.

Masoudi, S. Farhad; Jahromi, Saeed S. [Department of Physics, K.N. Toosi University of Technology, P.O. Box 15875-4416, Tehran (Iran, Islamic Republic of)

2012-09-01T23:59:59.000Z

456

Resistance associated with measurements of capacitance in electric double layers  

Science Journals Connector (OSTI)

The behavior of electric double layers at polarized interfaces in \\{KCl\\} solutions is revisited in order to examine properties of the constant phase element (CPE). We pay attention specifically to frequency-dependence of both the capacitance and the resistance. Two parallel platinum wires immersed in solution are used as insulator-free electrodes. They avoid stray capacitance or irreproducibility of impedance caused by incompleteness of electric shield of electrodes. The Nyquist plot takes approximately a straight line because the in-phase component, Z1 is inversely proportional to ac-frequency, similar to the capacitance. Since Z1 extrapolated to zero separation of the electrodes is non-zero, a resistance is present at the double layer in parallel form. It is not a Faradaic resistance because of absence of any electroactive species. The parallel resistance is inversely proportional to the frequency, whereas the capacitance decreases with a linear relation to logarithm of the frequency. The latter is responsible for the frequency-dependence of the former. The parallel resistance is the apparent one involved inevitably in ac-measurements of the capacitance. Values of the capacitance are independent of concentration of \\{KCl\\} in the domain from 0.1 mM to 3 M.

Koichi Aoki; Yongdan Hou; Jingyuan Chen; Toyohiko Nishiumi

2013-01-01T23:59:59.000Z

457

Tide-Induced Sediment Resuspension and the Bottom Boundary Layer in an Idealized Estuary with a Muddy Bed  

Science Journals Connector (OSTI)

Sediment transport and bottom boundary layer (BBL) in an idealized estuary with a muddy bed were studied by numerical simulations. The focus was placed on description and prediction of the dynamics of nepheloid layer (a fluid–mud layer) developed ...

X. H. Wang

2002-11-01T23:59:59.000Z

458

Efficient Charge Balance in Blue Phosphorescent Organic Light Emitting Diodes by Two Types of Mixed Layer  

Science Journals Connector (OSTI)

Abstract The authors have demonstrated a highly efficient and long-lifetime blue phosphorescent organic light emitting diode (PHOLED) that uses two types of mixed layers. The mixed layers play the role of carrier injection control and exciton generation zone extension. One of the layers is applied for mixing the hole transport layer (HTL) and host material at the HTL side for carrier injection control. The other works as a mixed electron transporting layer (ETL) and host material at the ETL side. The optimized blue PHOLED has been shown to achieve high performance owing to the mixed layer effects. It gave a maximum luminous efficiency of 25.55 cd/A, maximum external quantum efficiency of 13.05%, and lifetime of 7.24 h under 500 cd/m2. These results indicate that applying mixed layers is a simple and efficient method that does not require significant structural change.

Hyung Jin Yang; Ho Won Lee; Song Eun Lee; Yong Sun; Kyo Min Hwang; Han Kyu Yoo; Sung Kyu Lee; Woo Young Kim; Young Kwan Kim

2014-01-01T23:59:59.000Z

459

Abstract --This paper deals a double layer and a single layer Flux-Switching Permanent Magnet (FSPM) motors for a fault  

E-Print Network (OSTI)

Abstract --This paper deals a double layer and a single layer Flux-Switching Permanent Magnet (FSPM-Switching Permanent Magnet (FSPM) motors attract more and more attentions in the critical application as the Hybrid and will disturb the normal phases because of the magnetic coupling between phases. In order to compare the fault

Paris-Sud XI, Université de

460

The effect of substitution of zinc with aluminium in the brucite-like layers on the physicochemical properties of zinc-aluminium-layered double hydroxide-pamoate nanocomposite  

Science Journals Connector (OSTI)

Layered organic–inorganic hybrid materials of Zn-Al-layered double hydroxide (LDH)-pamoate nanocomposite (ZAPR) were prepared using various initial Zn/Al molar ratios (Ri) from 8:1 to 2:1 which gave initial value...

Zaemah Binti Jubri; Mohd Zobir Bin Hussein; Asmah Hj Yahaya…

2012-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "layers uncoated acrylic" 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

EART 265 Lecture Notes: Boundary Layers We're interested here mainly in boundary layers relevant to planets, i.e. those of planetary atmo-  

E-Print Network (OSTI)

of the bounding surface. Note that the vertical shear caused by the surface generates turbulence, whichEART 265 Lecture Notes: Boundary Layers We're interested here mainly in boundary layers relevant and the surface, thus mediating all interactions between the two. If we look back at the Navier-Stokes equations

Nimmo, Francis

462

Experimental Investigation of the Effect of Composition on the Performance and Characteristics of PEM Fuel Cell Catalyst Layers.  

E-Print Network (OSTI)

??The catalyst layer of a proton exchange membrane (PEM) fuel cell is a mixture of polymer, carbon, and platinum. The characteristics of the catalyst layer… (more)

Baik, Jungshik

2006-01-01T23:59:59.000Z

463

Spectroscopy of the layered high-temperature superconductors and their collective plasmon modes—a model for phonon- and plasmon-induced pairing  

Science Journals Connector (OSTI)

The recently discovered layered copper oxide high-Tc superconductors are discussed as models of a layered electron gas with highly anisotropic collective modes (layer plasmons). Our...

Kresin, V Z; Morawitz, H

1989-01-01T23:59:59.000Z

464

Scientist finds new way to predict heat layer troublemaker | Princeton  

NLE Websites -- All DOE Office Websites (Extended Search)

Boon to fusion: Boon to fusion: Scientist finds new way to predict heat layer troublemaker By John Greenwald August 27, 2012 Tweet Widget Facebook Like Google Plus One Rob Goldston. (Photo by Elle Starkman, PPPL Office Of Communications) Rob Goldston. Researchers at a recent worldwide conference on fusion power have confirmed the surprising accuracy of a new model for predicting the size of a key barrier to fusion that a top scientist at the U.S. Department of Energy's Princeton Plasma Physics Laboratory (PPPL) has developed. The model could serve as a starting point for overcoming the barrier. "This allows you to depict the size of the challenge so you can think through what needs to be done to overcome it," said physicist Robert Goldston, the Princeton University professor of astrophysical sciences and former PPPL director who

465

Method for producing functionally graded nanocrystalline layer on metal surface  

DOE Patents (OSTI)

An improved process for the creation or formation of nanocrystalline layers on substrates' surfaces is provided. The process involves "prescuffing" the surface of a substrate such as a metal by allowing friction to occur on the surface by a load-bearing entity making rubbing contact and moving along and on the substrate's surface. The "prescuffing" action is terminated when the coefficient of friction between the surface and the noise is rising significantly. Often, the significant rise in the coefficient of friction is signaled by a change in pitch of the scuffing action sound emanating from the buffeted surface. The "prescuffing" gives rise to a harder and smoother surface which withstands better any inadequate lubrication that may take place when the "prescuffed" surface is contacted by other surfaces.

Ajayi, Oyelayo O. (Oswego, IL); Hershberger, Jeffrey G. (Berwyn, IL)

2010-03-23T23:59:59.000Z

466

Microstructures of Si surface layers implanted with Cu  

SciTech Connect

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

467

Mechanical properties of irradiated single-layer graphene  

SciTech Connect

The mechanical properties of irradiated single-layer graphene sheets are determined as a function of inserted vacancy concentration. We find that the vacancy-induced crystalline-to-amorphous transition is accompanied by a brittle-to-ductile transition in the failure response of irradiated graphene sheets for inserted vacancy concentrations of 8%-12%. While point defects and larger voids appreciably degrade the strength of pristine graphene, we find that even heavily damaged samples ({approx}20% vacancies) exhibit tensile strengths of {approx}30 GPa, in significant excess of those typical of engineering materials. Our results suggest that defect engineering of graphene is feasible without incurring a complete loss of its desirable mechanical properties.

Carpenter, Corinne; Maroudas, Dimitrios [Department of Chemical Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003 (United States); Ramasubramaniam, Ashwin [Department of Mechanical and Industrial Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003 (United States)

2013-07-01T23:59:59.000Z

468

Extreme ultraviolet induced defects on few-layer graphene  

SciTech Connect

We use Raman spectroscopy to show that exposing few-layer graphene to extreme ultraviolet (EUV, 13.5 nm) radiation, i.e., relatively low photon energy, results in an increasing density of defects. Furthermore, exposure to EUV radiation in a H{sub 2} background increases the graphene dosage sensitivity, due to reactions caused by the EUV induced hydrogen plasma. X-ray photoelectron spectroscopy results show that the sp{sup 2} bonded carbon fraction decreases while the sp{sup 3} bonded carbon and oxide fraction increases with exposure dose. Our experimental results confirm that even in reducing environment oxidation is still one of the main source of inducing defects.

Gao, A.; Zoethout, E.; Lee, C. J. [FOM-Dutch Institute for Fundamental Energy Research, Edisonbaan 14, 3439 MN Nieuwegein (Netherlands)] [FOM-Dutch Institute for Fundamental Energy Research, Edisonbaan 14, 3439 MN Nieuwegein (Netherlands); Rizo, P. J.; Scaccabarozzi, L.; Banine, V. [ASML, De Run 6501, 5504DR Veldhoven (Netherlands)] [ASML, De Run 6501, 5504DR Veldhoven (Netherlands); Bijkerk, F. [FOM-Dutch Institute for Fundamental Energy Research, Edisonbaan 14, 3439 MN Nieuwegein (Netherlands) [FOM-Dutch Institute for Fundamental Energy Research, Edisonbaan 14, 3439 MN Nieuwegein (Netherlands); MESA Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede (Netherlands)

2013-07-28T23:59:59.000Z

469

Hypersonic hydrogen combustion in the thin viscous shock layer  

SciTech Connect

Different models of hypersonic diffusive hydrogen combustion in a thin viscous shock layer (TVSL) at moderate Reynolds numbers have been developed. The study is based on computations of nonequilibrium multicomponent flowfield parameters of air-hydrogen mixture in the TVSL near the blunt probe. The structure of computed combustion zones is analyzed. Under conditions of slot and uniform injections the zone structures are essentially different. Hydrogen injection conditions are discovered at which the nonreacting hydrogen zone and the zone enriched with the hydrogen combustion products appear near the body surface. Hydrogen, water, and OH concentrations identify these zones. More effective cooling of the probe surface occurs at moderate injections compared to strong ones. Under the blowing conditions at moderate Reynolds numbers the most effective cooling of the body surface occurs at moderate uniform hydrogen injection. The results can be helpful for predicting the degree of supersonic hydrogen combustion in hypersonic vehicle engines. 21 refs.

Riabov, V.V.; Botin, A.V. [Worcester Polytechnic Inst, Worcester, MA (United States)

1995-04-01T23:59:59.000Z

470

Conservation of bond lengths in strained Ge-Si layers  

Science Journals Connector (OSTI)

The combined techniques of x-ray-absorption fine structure and x-ray diffraction have been used to study the strain and bond distortions in epitaxial Ge-Si on Si(001). In a 31% Ge, 340-Å pseudomorphic Ge-Si film, the Ge-Ge and Ge-Si first-neighbor bond lengths have been found to be 2.44±0.02 and 2.38±0.02 Å, respectively. The lattice parameter perpendicular to the Ge-Si/Si(001) interface has been found to be a?=5.552±0.002 Å, in agreement with the predictions of macroscopic elastic theory. These results show that the bond-length strain in the epitaxial layer appears in the second and higher coordination shells, rather than in the nearest-neighbor bond lengths, which remain the same as in unstrained Ge-Si. A microscopic model is presented that accounts for these findings.

J. C. Woicik; C. E. Bouldin; M. I. Bell; J. O. Cross; D. J. Tweet; B. D. Swanson; T. M. Zhang; L. B. Sorensen; C. A. King; J. L. Hoyt; P. Pianetta; J. F. Gibbons

1991-01-15T23:59:59.000Z

471

One directional Polarized Neutron Reflectometry with optimized reference layer method  

E-Print Network (OSTI)

In the past decade, several neutron reflectometry methods for determining the modules and phase of complex reflection coefficient of an unknown multilayer thin film have been worked out among which the method of variation of surroundings and reference layers are of highest interest. These methods were later modified for measurement of polarization of reflected beam instead of the measurement of intensities. In their new architecture, these methods not only suffered from the necessity of change of experimental setup, but also another difficulty was added to their experimental implementations which was related to the limitations of the technology of the neutron reflectometers that could only measure the polarization of the reflected neutrons in the same direction as the polarization of the incident beam. As the instruments are limited, the theory has to be optimized so that the experiment could be performed. In a recent work, we have developed the method of variation of surroundings for one directional polariza...

Masoudi, Seyed Farhad

2012-01-01T23:59:59.000Z

472

Heat transport by laminar boundary layer flow with polymers  

E-Print Network (OSTI)

Motivated by recent experimental observations, we consider a steady-state Prandtl-Blasius boundary layer flow with polymers above a slightly heated horizontal plate and study how the heat transport might be affected by the polymers. We discuss how a set of equations can be derived for the problem and how these equations can be solved numerically by an iterative scheme. By carrying out such a scheme, we find that the effect of the polymers is equivalent to producing a space-dependent effective viscosity that first increases from the zero-shear value at the plate then decreases rapidly back to the zero-shear value far from the plate. We further show that such an effective viscosity leads to an enhancement in the drag, which in turn leads to a reduction in heat transport.

Roberto Benzi; Emily S. C. Ching.; Vivien W. S. Chu

2011-04-23T23:59:59.000Z

473

Bubble-Wrap for Bullets: The Stability Imparted By A Thin Magnetic Layer  

E-Print Network (OSTI)

There has been significant recent work which examines a situation where a thin magnetic layer is `draped' over a core merging into a larger cluster; the same process also appears to be at work at a bubble rising from the cluster centre. Such a thin magnetic layer could thermally isolate the core from the cluster medium, but only if the same shear process which generates the layer does not later disrupt it. On the other hand, if the magnetized layer can stabilize against the shear instabilities, then the magnetic layer can have the additional dynamical effect of reducing the shear-driven mixing of the core's material during the merger process. These arguments could equally well to underdense cluster bubbles, which would be even more prone to disruption. While it is well known that magnetic fields can suppress instabilities, it is less clear that a thin layer can suppress instabilities on scales significantly larger than its thickness. Here we consider the stability imparted by a thin magnetized layer. Such a layer can have a significant stabilizing effect even on modes with wavelengths much larger than the thickness of the layer l; to stabilize modes ten times larger requires only that the Alfv\\'en speed in the magnetized layer is comparable to the relevant destabilizing velocity -- the shear velocity in the case of pure Kelvin-Helmholtz like instability, or a typical buoyancy velocity in the case of pure Rayleigh-Taylor. We confirm our calculations with two-dimensional numerical experiments using the Athena code.

L. J. Dursi

2007-06-21T23:59:59.000Z

474

Thermodynamic properties and interfacial layer characteristics of HfO{sub 2} thin films deposited by plasma-enhanced atomic layer deposition  

SciTech Connect

The thermodynamic properties and interfacial characteristics of HfO{sub 2} thin films that were deposited by the direct plasma atomic layer deposition (DPALD) method are investigated. The as-deposited HfO{sub 2} films that were deposited by the DPALD method show crystallization of the HfO{sub 2} layers, which initiates at approximately the 35th cycle (about 2.8 nm) of the DPALD process. Medium-energy ion scattering analysis reveals that the direct O{sub 2} plasma causes a compositional change in the interfacial layer as the process progresses. With an increase in the number of process cycles, the Si content decreases and the O content increases at that position, so that the HfO{sub 2}-like Hf-silicate layer is formed on top of the interfacial layer. The enhanced physical reactivity of the oxygen ions in the direct plasma and the Hf-silicate layer may be the driving forces that accelerate the early crystallization of the HfO{sub 2} layer in the DPALD process in the as-deposited state.

Kim, Inhoe; Kuk, Seoungwoo; Kim, Seokhoon; Kim, Jinwoo; Jeon, Hyeongtag; Cho, M.-H.; Chung, K.-B. [Division of Materials Science and Engineering, Hanyang University, Seoul 133-791 (Korea, Republic of); Korea Research Institute of Standard and Science, Daejeon 305-600 (Korea, Republic of)

2007-05-28T23:59:59.000Z

475

Chemical Solution Derived Planarization Layers for Highly Aligned IBAD MgO Templates  

SciTech Connect

The main goal of this research is to develop a chemical solution derived planarization layer to fabricate highly aligned IBAD-MgO templates for the development of high temperature superconductor (HTS) based coated conductors. The standard IBAD-MgO template needs an additional electrochemical polishing step of the mechanically polished 50- m-thick Hastelloy C-276 substrates to ensure a flat and smooth surface for subsequent growth of multi-layer buffer architectures, which include: sputtered 80-nm Al2O3; sputtered 7-nm Y2O3; IBAD 10-nm MgO; sputtered 30-nm homo-epi MgO; and sputtered 30-nm LaMnO3 (LMO) layers. We have successfully developed a solution planarization layer that removes the electrochemical polishing step and also acts as a barrier layer. Crack-free, smooth Al2O3 layers were prepared on mechanically polished Hastelloy substrates using a chemical solution process. A nearly 10-15-nm thick Al2O3 layer was formed with each coating and the coating was repeated several times to achieve the desired film thickness with intermediate heat-treatments after each coating. The Al2O3 planarization layer significantly reduced the surface roughness of the substrate. The average surface roughness value, Ra for a starting substrate was 9-10 nm. After 8 coatings of Al2O3 layer, the Ra was reduced to 2 nm. Highly aligned IBAD-MgO layers with out-of-plane and in-plane textures comparable to the standard IBAD-MgO layers were successfully deposited on top of the solution planarization Al2O3 layers with an Y2O3 nucleation layer using a reel-to-reel ion-beam sputtering system. Both homo-epi MgO and LMO layers were subsequently deposited on the IBAD-MgO layers using rf sputtering to complete the buffer stack required for the growth of HTS films. YBa2Cu3O7- (YBCO) films with a thickness of 0.8 m deposited on these IBAD-MgO templates by pulsed laser deposition showed a high self-field critical current density, Jc of 3.04 MA/cm2 at 77 K and 6.05 MA/cm2 at 65 K. These results demonstrate that a low-cost chemical-solution-based, high-throughput Al2O3 planarization layer can remove the electro-polishing step and replace sputtered Al2O3 layers for the production of high Jc YBCO-coated conductors.

Paranthaman, Mariappan Parans [ORNL] [ORNL; Aytug, Tolga [ORNL] [ORNL; Stan, Liliana [Los Alamos National Laboratory (LANL)] [Los Alamos National Laboratory (LANL); Jia, Quanxi [Los Alamos National Laboratory (LANL)] [Los Alamos National Laboratory (LANL); Cantoni, Claudia [ORNL] [ORNL; Wee, Sung Hun [ORNL] [ORNL

2014-01-01T23:59:59.000Z

476

BI-LAYER p-n JUNCTION INTERCONNECTIONS FOR COAL BASED SOLID OXIDE FUEL CELLS  

SciTech Connect

In this report, a new approach for lower operating temperature solid oxide fuel cells (SOFCs) interconnections (IC) consisting of a bi-layer structure is proposed and analyzed. The bi-layer structure consists of a p-type layer exposed to cathodic gas (air/oxygen) and an n-type layer exposed to anodic gas (fuel). It is theoretically shown that the interfacial oxygen partial pressure which is an important design variable, is dependent primarily on the oxygen partial pressure gradient across the IC, the low level oxygen conductivities of the two layers and is largely independent of their electronic conductivities and the total current density through the IC material. Experimental difficulties in fabricating bi-layer structures are presently being addressed.

Srikanth Gopalan

2005-01-29T23:59:59.000Z

477

Structure and phase transitions into ionic adsorption layers on liquid interfaces  

E-Print Network (OSTI)

The structure of ionic adsorption layers is studied via a proper thermodynamic treatment of the electrostatic and non-electrostatic interactions between the surfactant ions as well as of the effect of thermodynamic non-locality. The analysis is also applied to phase transitions into the ionic adsorption layer, which interfere further with the oscillatory-diffusive structure of the electric double layer and hydrodynamic stability of squeezing waves in thin liquid films.

R. Tsekov

2014-03-02T23:59:59.000Z

478

New P2 Compound with Brucite-Like Layers: Potassium Lithiostannate  

Science Journals Connector (OSTI)

New P2 Compound with Brucite-Like Layers: Potassium Lithiostannate ... A new compound with brucite-like layers (K0.72Li0.24Sn0.76O2) ... A new compound with brucite-like layers, K0.72Li0.24Sn0.76O2, has been obtained two ways, via solid-state reactions: with a big excess of KOH and in a controllable atmosphere without water and carbon dioxide. ...

Igor L. Shukaev; Vera V. Butova

2012-04-11T23:59:59.000Z

479

Improved property in organic light-emitting diode utilizing two Al/Alq3 layers  

Science Journals Connector (OSTI)

We reported on the fabrication of organic light-emitting devices (OLEDs) utilizing the two Al/Alq"3 layers and two electrodes. This novel green device with structure of Al(110nm)/tris(8-hydroxyquinoline) aluminum (Alq"3)(65nm)/Al(110nm)/Alq"3(50nm)/N,N'-dipheny1-N, ... Keywords: Emitting layer, OLEDS, Transporting layer

Chunlin Zhang; Su Liu; Fangcong Wang; Yong Zhang

2008-12-01T23:59:59.000Z

480

Fabrication of heterojunction solar cells by improved tin oxide deposition on insulating layer  

DOE Patents (OSTI)

Highly efficient tin oxide-silicon heterojunction solar cells are prepared by heating a silicon substrate, having an insulating layer thereon, to provide a substrate temperature in the range of about 300.degree. C. to about 400.degree. C. and thereafter spraying the so-heated substrate with a solution of tin tetrachloride in a organic ester boiling below about 250.degree. C. Preferably the insulating layer is naturally grown silicon oxide layer.

Feng, Tom (Morris Plains, NJ); Ghosh, Amal K. (New Providence, NJ)

1980-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "layers uncoated acrylic" 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.


481

p-Type semiconducting nickel oxide as an efficiency-enhancing anodal interfacial layer in bulk heterojunction solar cells  

DOE Patents (OSTI)

The present invention, in one aspect, relates to a solar cell. In one embodiment, the solar cell includes an anode, a p-type semiconductor layer formed on the anode, and an active organic layer formed on the p-type semiconductor layer, where the active organic layer has an electron-donating organic material and an electron-accepting organic material.

Irwin, Michael D; Buchholz, Donald B; Marks, Tobin J; Chang, Robert P. H.

2014-11-25T23:59:59.000Z

482

Cross Layer Dynamic Resource Allocation with Targeted Throughput for WCDMA Data  

E-Print Network (OSTI)

Connection access control; rate scheduling. Our goal is toconnection access control and rate scheduling that supportsconnection access control and rate scheduling layers. The

Zhang, Peifang; Jordan, Scott

2008-01-01T23:59:59.000Z

483

Free MHD Shear Layers In The Presence Of Rotation And Magnetic Field  

SciTech Connect

We present an experimental and numerical study of hydrodynamic and magnetohydrodynamic free shear layers and their stability. We first examine the experimental measurement of globally unstable hydrodynamic shear layers in the presence of rotation, and their range of instability. These are compared to numerical simulations, which are used to explain the modification of the shear layer and thus the critical Rossby number for stability. Magnetic fields are then applied to these scenarios, and globally unstable magnetohydrodynamic shear layers generated. These too are compared to numerical simulations, showing behavior consistent with the hydrodynamic case and previously reported measurements.

E.J. Spence, A.H. Roach, E.M. Edlund, P. Sloboda and H. Ji

2012-03-20T23:59:59.000Z

484

A first order geometric auto regressive process for boundary layer wind speed simulation  

Science Journals Connector (OSTI)

Under certain conditions the first order geometric auto regressive (AR) process has statistical properties similar to atmospheric boundary layer wind speed. In this contribution, we investigate ... this stochas...

T. Laubrich; H. Kantz

2009-08-01T23:59:59.000Z

485

About First Order Geometric Auto Regressive Processes for Boundary Layer Wind Speed Simulation  

Science Journals Connector (OSTI)

Under certain conditions the first order geometric auto regressive process has statistical properties similar to atmospheric boundary layer wind speed. In this contribution, we investigate ... this stochastic pro...

Thomas Laubrich; Holger Kantz

2010-01-01T23:59:59.000Z

486

E-Print Network 3.0 - assignment cross layer Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

HelloSoft, Inc... to the peculiarities of the wireless medium. To illustrate their point, researchers usually present a cross-layer... design proposal. Broadly speaking,...

487

Reflection of Waterborne acoustic waves from a viscoelastic layer on a rigid hacking with perforations  

Science Journals Connector (OSTI)

The reflection coefficient is calculated for a plane acoustic wave normally incident on a viscoelasticrubber cover layer submerged in water. The rubber layer is mounted on a rigid backing with air?filled cylindrical perforations. Acoustical losses are attributed to motion of the layer over the perforations. This motion is calculated by treating the layer above each perforation as a vibrating circular viscoelastic plate. Different boundary conditions are assumed and in each case the soundreflection coefficient is calculated. The results are compared with the experimental data of R. Lane [Ultrason. 19 28–30 (1981)].

J. Jarzynski

1982-01-01T23:59:59.000Z

488

Resuspension of Small Particles from Multilayer Deposits in Turbulent Boundary Layers  

E-Print Network (OSTI)

We present a hybrid stochastic model for the resuspension of micron-size particles from multilayer deposits in a fully-developed turbulent boundary layer. The rate of removal of particles from any given layer depends upon the rate of removal of particles from the layer above which acts as a source of uncovering and exposure of particles to the resuspending flow. The primary resuspension rate constant for an individual particle within a layer is based on the Rock'n'Roll (R'n'R) model using non-Gaussian statistics for the aerodynamic forces acting on the particles (Zhang et al., 2012). The coupled layer equations that describe multilayer resuspension of all the particles in each layer are based on the generic lattice model of Friess & Yadigaroglu (2001) which is extended here to include the influence of layer coverage and particle size distribution. We consider the influence of layer thickness on the resuspension along with the spread of adhesion within layers, and the statistics of non-Gaussian versus Gaussian removal forces including their timescale. Unlike its weak influence on long-term resuspension rates for monolayers, this timescale plays a crucial and influential role in multilayer resuspension. Finally we compare model predictions with those of a large-scale and a mesoscale resuspension test, STORM (Castelo et al., 1999) and BISE (Alloul-Marmor, 2002).

F. Zhang; M. Reeks; M. Kissane; R. J. Perkins

2012-06-09T23:59:59.000Z

489

Resuspension of small particles from multilayer deposits in turbulent boundary layers  

Science Journals Connector (OSTI)

Abstract This paper describes a hybrid kinetic model for the resuspension of micron-size particles from multilayer deposits in a fully developed turbulent boundary layer. The rate of removal of particles from any given layer depends upon the rate of removal of particles from the layer above which acts as a source of uncovering and exposure of particles to the resuspending flow. The primary resuspension rate constant for an individual particle within a layer is based on the Rock'n'Roll (R'n'R) model using non-Gaussian statistics for the aerodynamic removal forces acting on the particles (Zhang et al., 2013). The coupled layer equations that describe multilayer resuspension of all the particles in each layer are based on the generic lattice model of Friess & Yadigaroglu (2001) which is extended here to include the influence of layer coverage and particle size distribution. The model is used to investigate a range of effects, including the influence of layer thickness on resuspension, the spread of inter-particle adhesive forces within layers, Gaussian and non-Gaussian pdfs for the removal forces and the associated timescales. Finally model predictions are compared with data from two resuspension experiments – STORM (Castelo et al., 1999) and BISE (Alloul-Marmor, 2002).

F. Zhang; M.W. Reeks; M.P. Kissane; R.J. Perkins

2013-01-01T23:59:59.000Z

490

Collaborative-Hybrid Multi-Layer Network Control for Emerging Cyber-Infrastructures  

SciTech Connect

At a high level, there were four basic task areas identified for the Hybrid-MLN project. They are: o Multi-Layer, Multi-Domain, Control Plane Architecture and Implementation, including ? OSCARS layer2 and InterDomain Adaptation, ? Integration of LambdaStation and Terapaths with Layer2 dynamic provisioning, ? Control plane software release, ? Scheduling, AAA, security architecture, ? Network Virtualization architecture, ? Multi-Layer Network Architecture Framework Definition; o Heterogeneous DataPlane Testing; o Simulation; o Project Publications, Reports, and Presentations.

Lehman, Tom [USC] [USC; Ghani, Nasir [UNM] [UNM; Boyd, Eric [UCAID] [UCAID

2010-08-31T23:59:59.000Z

491

E-Print Network 3.0 - atomic layer graphene Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

graphene Search Powered by Explorit Topic List Advanced Search Sample search results for: atomic layer graphene Page: << < 1 2 3 4 5 > >> 1 Graphite Handout Graphite is a...

492

Surface reconstruction and chemical evolution of stoichiometric layered cathode materials for lithium-ion batteries  

E-Print Network (OSTI)

Li-Rich Layered Oxides for Lithium Batteries. Nano Lett. 13,O 2 Cathode Material in Lithium Ion Batteries. Adv. Energysolvent decomposition in lithium ion batteries: first-

Lin, Feng

2014-01-01T23:59:59.000Z

493

Layered double hydroxides : synthesis and application in gene delivery to mammalian cells in culture.  

E-Print Network (OSTI)

??Layered double hydroxides (LDHs) or hydrotalcite-like compounds (HTLcs) are classified as anionic clays in which their structure is based upon brucite and are represented by… (more)

Balcomb, Blake.

2010-01-01T23:59:59.000Z

494

Heterogeneous ultrathin films fabricated by alternate assembly of exfoliated layered double hydroxides and polyanionw  

E-Print Network (OSTI)

, respectively, AnÃ? n-valent anion).1 Their structure is based on brucite-like layers, where divalent metal

Wang, Zhong L.

495

High-activity fuel cell catalyst layers via block copolymer nanocomposites.  

E-Print Network (OSTI)

??Current polymer electrolyte membrane fuel cell (PEMFC) catalyst layers are disordered blends of carbon-supported platinum catalyst in an ionomeric matrix. The objective of this research… (more)

Alabi, Toheeb Bola

2008-01-01T23:59:59.000Z

496

Solution to the Boltzmann equation for layered systems for current perpendicular to the planes  

SciTech Connect

Present theories of giant magnetoresistance (GMR) for current perpendicular to the planes (CPP) are based on an extremely restricted solution to the Boltzmann equation that assumes a single free electron band structure for all layers and all spin channels. Within this model only the scattering rate changes from one layer to the next. This model leads to the remarkable result that the resistance of a layered material is simply the sum of the resistances of each layer. We present a solution to the Boltzmann equation for CPP for the case in which the electronic structure can be different for different layers. The problem of matching boundary conditions between layers is much more complicated than in the current in the planes (CIP) geometry because it is necessary to include the scattering-in term of the Boltzmann equation even for the case of isotropic scattering. This term couples different values of the momentum parallel to the planes. When the electronic structure is different in different layers there is an interface resistance even in the absence of intermixing of the layers. The size of this interface resistance is affected by the electronic structure, scattering rates, and thicknesses of nearby layers. For Co-Cu, the calculated interface resistance and its spin asymmetry is comparable to that measured at low temperature in sputtered samples. (c) 2000 American Institute of Physics.

Butler, W. H. [Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)] [Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States); Zhang, X.-G. [Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)] [Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States); MacLaren, J. M. [Tulane University, New Orleans, Louisiana 70018 (United States)] [Tulane University, New Orleans, Louisiana 70018 (United States)

2000-05-01T23:59:59.000Z

497

Method for applying a barrier layer to a silicon based substrate  

DOE Patents (OSTI)

A method for applying a barrier layer which comprises a barium-strontium aluminosilicate to a silicon containing substrate which inhibits the formation of cracks.

Eaton, Harry E. (Woodstock, CT); Lawton, Thomas H. (Wethersfield, CT)

2001-01-01T23:59:59.000Z

498

Method for applying a barrier layer to a silicon based substrate  

DOE Patents (OSTI)

A method for applying a barrier layer which comprises a barium-strontium aluminosilicate to a silicon containing substrate which inhibits the formation of cracks.

Eaton, Harry E. (Woodstock, CT); Lawton, Thomas H. (Wethersfield, CT)

2002-01-01T23:59:59.000Z

499

Analysis of mesoscopic loss effects in fine layered fluid-saturated ...  

E-Print Network (OSTI)

Reservoirs rocks consists usually of thinly layered fluid-saturated .... the sea bottom, which contains a highly permeable sandstone, where carbon dioxide (

santos,,,

500

E-Print Network 3.0 - anisotropic layered media Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

Queen's University (Kingston) Collection: Geosciences 2 RESEARCH PROGRAMME ON SEISMIC WAVES IN COMPLEX 3-D STRUCTURES Summary: for layered media. (e) Weak attenuation. (f)...