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1

Platinum Nanoclusters Out-Perform Single Crystals  

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

Platinum Nanoclusters Out-Perform Single Crystals Print Platinum Nanoclusters Out-Perform Single Crystals Print When it comes to metal catalysts, platinum is the standard. However, at about $2,000 an ounce, the high cost of the raw material presents major challenges for the future wide-scale use of platinum in fuel cells. Berkeley Lab research suggests that one possible way to meet these challenges is to think small. Researchers from Berkeley Lab's Materials Sciences Division have found that under high pressure-comparable to the pressures at which many industrial technologies operate-platinum surfaces can change their structure dramatically in response to the presence of high-coverage reactants. High-pressure scanning tunneling microscopes (STM) and ambient-pressure x-ray photoelectron spectroscopy (AP-XPS) at ALS Beamlines 9.3.2 and 11.0.2 allowed researchers to study catalysts' structure and composition under realistic conditions.

2

Platinum Nanoclusters Out-Perform Single Crystals  

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

Platinum Nanoclusters Out-Perform Single Crystals Print Platinum Nanoclusters Out-Perform Single Crystals Print When it comes to metal catalysts, platinum is the standard. However, at about $2,000 an ounce, the high cost of the raw material presents major challenges for the future wide-scale use of platinum in fuel cells. Berkeley Lab research suggests that one possible way to meet these challenges is to think small. Researchers from Berkeley Lab's Materials Sciences Division have found that under high pressure-comparable to the pressures at which many industrial technologies operate-platinum surfaces can change their structure dramatically in response to the presence of high-coverage reactants. High-pressure scanning tunneling microscopes (STM) and ambient-pressure x-ray photoelectron spectroscopy (AP-XPS) at ALS Beamlines 9.3.2 and 11.0.2 allowed researchers to study catalysts' structure and composition under realistic conditions.

3

Platinum Nanoclusters Out-Perform Single Crystals  

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

Platinum Nanoclusters Out-Perform Single Crystals Print Platinum Nanoclusters Out-Perform Single Crystals Print When it comes to metal catalysts, platinum is the standard. However, at about $2,000 an ounce, the high cost of the raw material presents major challenges for the future wide-scale use of platinum in fuel cells. Berkeley Lab research suggests that one possible way to meet these challenges is to think small. Researchers from Berkeley Lab's Materials Sciences Division have found that under high pressure-comparable to the pressures at which many industrial technologies operate-platinum surfaces can change their structure dramatically in response to the presence of high-coverage reactants. High-pressure scanning tunneling microscopes (STM) and ambient-pressure x-ray photoelectron spectroscopy (AP-XPS) at ALS Beamlines 9.3.2 and 11.0.2 allowed researchers to study catalysts' structure and composition under realistic conditions.

4

Platinum Nanoclusters Out-Perform Single Crystals  

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

Platinum Nanoclusters Out-Perform Single Crystals Print Platinum Nanoclusters Out-Perform Single Crystals Print When it comes to metal catalysts, platinum is the standard. However, at about $2,000 an ounce, the high cost of the raw material presents major challenges for the future wide-scale use of platinum in fuel cells. Berkeley Lab research suggests that one possible way to meet these challenges is to think small. Researchers from Berkeley Lab's Materials Sciences Division have found that under high pressure-comparable to the pressures at which many industrial technologies operate-platinum surfaces can change their structure dramatically in response to the presence of high-coverage reactants. High-pressure scanning tunneling microscopes (STM) and ambient-pressure x-ray photoelectron spectroscopy (AP-XPS) at ALS Beamlines 9.3.2 and 11.0.2 allowed researchers to study catalysts' structure and composition under realistic conditions.

5

Platinum Nanoclusters Out-Perform Single Crystals  

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

Platinum Nanoclusters Out-Perform Single Crystals Print Platinum Nanoclusters Out-Perform Single Crystals Print When it comes to metal catalysts, platinum is the standard. However, at about $2,000 an ounce, the high cost of the raw material presents major challenges for the future wide-scale use of platinum in fuel cells. Berkeley Lab research suggests that one possible way to meet these challenges is to think small. Researchers from Berkeley Lab's Materials Sciences Division have found that under high pressure-comparable to the pressures at which many industrial technologies operate-platinum surfaces can change their structure dramatically in response to the presence of high-coverage reactants. High-pressure scanning tunneling microscopes (STM) and ambient-pressure x-ray photoelectron spectroscopy (AP-XPS) at ALS Beamlines 9.3.2 and 11.0.2 allowed researchers to study catalysts' structure and composition under realistic conditions.

6

Platinum Nanoclusters Out-Perform Single Crystals  

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

Platinum Nanoclusters Out-Perform Single Crystals Print Platinum Nanoclusters Out-Perform Single Crystals Print When it comes to metal catalysts, platinum is the standard. However, at about $2,000 an ounce, the high cost of the raw material presents major challenges for the future wide-scale use of platinum in fuel cells. Berkeley Lab research suggests that one possible way to meet these challenges is to think small. Researchers from Berkeley Lab's Materials Sciences Division have found that under high pressure-comparable to the pressures at which many industrial technologies operate-platinum surfaces can change their structure dramatically in response to the presence of high-coverage reactants. High-pressure scanning tunneling microscopes (STM) and ambient-pressure x-ray photoelectron spectroscopy (AP-XPS) at ALS Beamlines 9.3.2 and 11.0.2 allowed researchers to study catalysts' structure and composition under realistic conditions.

7

Platinum Nanoclusters Out-Perform Single Crystals  

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

Platinum Nanoclusters Out-Perform Single Platinum Nanoclusters Out-Perform Single Crystals Platinum Nanoclusters Out-Perform Single Crystals Print Wednesday, 27 October 2010 00:00 When it comes to metal catalysts, platinum is the standard. However, at about $2,000 an ounce, the high cost of the raw material presents major challenges for the future wide-scale use of platinum in fuel cells. Berkeley Lab research suggests that one possible way to meet these challenges is to think small. Researchers from Berkeley Lab's Materials Sciences Division have found that under high pressure-comparable to the pressures at which many industrial technologies operate-platinum surfaces can change their structure dramatically in response to the presence of high-coverage reactants. High-pressure scanning tunneling microscopes (STM) and ambient-pressure x-ray photoelectron spectroscopy (AP-XPS) at ALS Beamlines 9.3.2 and 11.0.2 allowed researchers to study catalysts' structure and composition under realistic conditions.

8

Synthesis Of Fluorescent Metal Nanoclusters  

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

Synthesis Of Fluorescent Metal Nanoclusters Synthesis Of Fluorescent Metal Nanoclusters Fluorescent metal nanoclusters were prepared. Available for thumbnail of Feynman Center...

9

Photocatalysis Using Semiconductor Nanoclusters  

SciTech Connect (OSTI)

We report on experiments using nanosize MoS{sub 2} to photo-oxidize organic pollutants in water using visible light as the energy source. We have demonstrated that we can vary the redox potentials and absorbance characteristics of these small semiconductors by adjusting their size, and our studies of the photooxidation of organic molecules have revealed that the rate of oxidation increases with increasing bandgap (i.e. more positive valence band and more negative conduction band potentials). Because these photocatalysis reactions can be performed with the nanoclusters fully dispersed and stable in solution, liquid chromatography can be used to determine both the intermediate reaction products and the state of the nanoclusters during the reaction. We have demonstrated that the MoS{sub 2} nanoclusters remain unchanged during the photooxidation process by this technique. We also report on studies of MoS{sub 2} nanoclusters deposited on TiO{sub 2} powder.

Thurston, T.R.; Wilcoxon,J.P.

1999-01-21T23:59:59.000Z

10

Formation of solid Kr nanoclusters in MgO  

Science Journals Connector (OSTI)

The phenomenon of positron confinement enables us to investigate the electronic structure of nanoclusters embedded in host matrices. Solid Kr nanoclusters are a very interesting subject of investigation because of the very low predicted value of the positron affinity of bulk Kr. In this work, positron trapping in solid Kr nanoclusters embedded in MgO is investigated. The Kr nanoclusters were created by means of 280 keV Kr ion implantation in single crystals of MgO(100) and subsequent thermal annealing at a temperature of 1100 K. The nanoclusters were observed by cross-sectional transmission electron microscopy in high-resolution mode. The fcc Kr nanoclusters are rectangularly shaped with sizes of 2 to 5 nm and are in a cube-on-cube orientation relationship with the MgO host matrix. From the Moiré fringes in high-resolution recordings, the lattice parameter of the solid Kr was deduced and found to vary from 5.3 to 5.8 Å. The corresponding pressures are 0.6–2.5 GPa as found using the Ronchi equation of state. The relationship between lattice parameter and cluster size was investigated and it was found that the lattice parameter increases linearly with increasing nanocluster size. The defect evolution during annealing was monitored by means optical absorption spectroscopy and positron beam analysis. No evidence of positron trapping was found despite the very low positron affinity of solid Kr. Alternative definitions of the positron affinity are proposed for application to insulator materials.

M. A. van Huis; A. van Veen; H. Schut; B. J. Kooi; J. Th. M. De Hosson

2003-06-10T23:59:59.000Z

11

ZnO nanoclusters: Synthesis and photoluminescence. | EMSL  

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

ZnO nanoclusters: Synthesis and photoluminescence. ZnO nanoclusters: Synthesis and photoluminescence. Abstract: ZnO nanoclusters were prepared and deposited at room temperature...

12

Radiation Stability of Nanoclusters in Nano-structured Oxide...  

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

Stability of Nanoclusters in Nano-structured Oxide Dispersion Strengthened (ODS) Steels. Radiation Stability of Nanoclusters in Nano-structured Oxide Dispersion Strengthened (ODS)...

13

NREL Scientists Reveal Origin of Diverse Melting Behaviors of Aluminum Nanoclusters (Fact Sheet)  

SciTech Connect (OSTI)

Research reveals active role of cluster symmetries on the size-sensitive, diverse melting behaviors of metallic nanoclusters, providing insight to understanding phase changes of nanoparticles for thermal energy storage. Unlike macroscopic bulk materials, intermediate-sized nanoclusters with around 55 atoms inherently exhibit size-sensitive melting changes: adding just a single atom to a nanocluster can cause a dramatic change in melting behavior. Microscopic understanding of thermal behaviors of metal nanoclusters is important for nanoscale catalysis and thermal energy storage applications. However, it is a challenge to obtain a structural interpretation at the atomic level from measured thermodynamic quantities such as heat capacity. Using ab initio molecular dynamics simulations, scientists at the National Renewable Energy Laboratory (NREL) revealed a clear correlation between the diverse melting behaviors of aluminum nanoclusters and cluster core symmetries. These simulations reproduced, for the first time, the size-sensitive heat capacities of aluminum nanoclusters, which exhibit several distinctive shapes associated with the diverse melting behaviors of the clusters. The size-dependent, diverse melting behaviors of the aluminum clusters are attributed to the reduced symmetry (from Td {yields} D2d {yields} Cs) with increasing the cluster sizes and can be used to help design thermal storage materials.

Not Available

2011-10-01T23:59:59.000Z

14

Molecular Dynamics Simulations of Supported Pt Nanoclusters  

E-Print Network [OSTI]

¤Introduction and Background ¤Constructing a Physical Model ¤Details of the Simulation ¤Results and Conclusions · Petroleum reformation · Gasification of biomass for biofuels #12;Previous Investigation of NanoclustersMolecular Dynamics Simulations of Supported Pt Nanoclusters Jeffrey Moore #12;A Brief Outline

Washington at Seattle, University of - Department of Physics, Electroweak Interaction Research Group

15

Co-adsorption of ?-casein and calcium phosphate nanoclusters (CPN) at hydrophilic and hydrophobic solid–solution interfaces studied by neutron reflectometry  

Science Journals Connector (OSTI)

Neutron reflectometry was used to study the co-adsorption of calcium phosphate nanoclusters (CPN) and ?-casein at hydrophobized and hydrophilic silica–water interfaces. The structural characteristics of the adsorbed layer were determined from neutron reflectivity curves analysed with multi-layer optical models. We used a highly specific proteolytic enzyme, endoproteinase Asp-N in conjunction with a single neutron contrast to verify the model of the protein layer structure. The results showed that the calcium phosphate nanoclusters profoundly affected the rate of adsorption and structure of the interface compared to the adsorption of ?-casein alone and for the hydrophobic interface the effects depended on the point at which the nanoclusters were added. It is proposed that the nanoclusters become surface active because whole ?-casein molecules can replace one or more of the hydrophilic peptides in the shell of the nanoclusters.

David Follows; Carl Holt; Robert K. Thomas; Fredrik Tiberg; Giovanna Fragneto; Tommy Nylander

2011-01-01T23:59:59.000Z

16

Structural Transition of Gold Nanoclusters: From the Golden Cage...  

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

Nanoclusters: From the Golden Cage to the Golden Pyramid . Abstract: How nanoclusters transform from one structural type to another as a function of size is a critical issue in...

17

Magnetism of Co nanocluster films  

Science Journals Connector (OSTI)

A cluster-beam technique is used to produce nearly monodispersed nanoclusters of Co while independently varying their size and concentration. The Co clusters are embedded in Cu and SiO2 to form films with cluster size varying from 300 to 9000 atoms and Co concentration varying from 10 to 50 vol %. The Co magnetization (Ms) increases with increasing cluster size and decreases with increasing Co concentration for a given cluster size but is always less than the bulk value. First-principles calculations are used to analyze the experimental data in terms of the local environment effects at the cluster-matrix interface and spin-glass-like behavior due to the strong ferro- and antiferromagnetic intercluster exchange interactions for small separations.

Y. Qiang; R. F. Sabiryanov; S. S. Jaswal; Y. Liu; H. Haberland; D. J. Sellmyer

2002-08-02T23:59:59.000Z

18

Ice nanoclusters at hydrophobic metal surfaces  

E-Print Network [OSTI]

and characterization of metal-supported water hexamers and a family of hydrated nanoclusters-- heptamers, octamers to nucleate through the presence of an `ice nucleating agent': a microscopic seed particle of salt, sand or such as the formation of new water structures not observed in the gas phase, altered H-bond strengths or different

19

Optical guiding of absorbing nanoclusters in air  

E-Print Network [OSTI]

Optical guiding of absorbing nanoclusters in air Vladlen G. Shvedov1-3, Anton S. Desyatnikov1124@rsphysse.anu.edu.au Abstract: We suggest a novel approach in all-optical trapping employing number of particles in a dual beam optical trap created by two counter-propagating and co

20

Growth and characterization of barium oxide nanoclusters on YSZ(111)  

SciTech Connect (OSTI)

Barium oxide (BaO) was grown on YSZ(111) substrate by oxygen-plasma-assisted molecular beam epitaxy (OPA-MBE). In-situ reflection high-energy electron diffraction, ex-situ x-ray diffraction, atomic force microscopy and x-ray photoelectron spectroscopy have confirmed that the BaO grows as clusters on YSZ(111). During and following the growth under UHV conditions, BaO remains in single phase. When exposed to ambient conditions, the clusters transformed to BaCO3 and/or Ba(OH)2 H2O. However, in a few attempts of BaO growth, XRD results show a fairly single phase cubic BaO with a lattice constant of 0.5418(1) nm. XPS results show that exposing BaO clusters to ambient conditions results in the formation BaCO3 on the surface and partly Ba(OH)2 throughout in the bulk. Based on the observations, it is concluded that the BaO nanoclusters grown on YSZ(111) are highly reactive in ambient conditions. The variation in the reactivity of BaO between different attempts of the growth is attributed to the cluster size.

Nachimuthu, Ponnusamy; Kim, Yong Joo; Kuchibhatla, Satyanarayana V N T; Yu, Zhongqing; Jiang, Weilin; Engelhard, Mark H.; Shutthanandan, V.; Szanyi, Janos; Thevuthasan, Suntharampillai

2009-08-13T23:59:59.000Z

Note: This page contains sample records for the topic "nanoclusters out-perform single" 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

Fabrication of metallic nanostructures from sputtered nanocluster precursors  

E-Print Network [OSTI]

This thesis studies the morphological and electrical properties of copper nanocluster devices generated by DC magnetron sputtering and annealed at temperatures up to 1100 C. At each annealing step, the resistivity of the ...

DelHagen, William S

2004-01-01T23:59:59.000Z

22

Structures and Stabilities of (MgO)n Nanoclusters. | EMSL  

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

(MgO)n Nanoclusters. Abstract: Global minima for (MgO)n structures were optimized using a tree growth?hybrid genetic algorithm in conjunction with MNDOMNDOd semiempirical...

23

Site-Selective Ionization in Nanoclusters Affects Subsequent Fragmentation  

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

Site-Selective Ionization in Nanoclusters Affects Subsequent Fragmentation Print Site-Selective Ionization in Nanoclusters Affects Subsequent Fragmentation Print Understanding charge-transfer processes at the atomic level of nanoscale systems is of the utmost importance for designing nanodevices based on quantum-dot structures, nanotubes, or two-dimensional graphene sheets. Researchers from Western Michigan University, Berkeley Lab, and other international research facilities investigated charge-transfer processes and subsequent ion fragmentation dynamics in nanoclusters composed of argon (Ar) shells and xenon (Xe) cores. The clusters were site-selectively ionized (i.e, ionization took place either in the xenon core or in the argon shell). Using a high-resolution photoelectron-ion coincidence technique at ALS Beamlines 10.0.1 and 11.0.2, the researchers concluded that charge-transfer processes and fragmentation dynamics are strongly influenced by the environment of the initially ionized atoms.

24

Site-Selective Ionization in Nanoclusters Affects Subsequent Fragmentation  

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

Site-Selective Ionization in Nanoclusters Affects Subsequent Fragmentation Print Site-Selective Ionization in Nanoclusters Affects Subsequent Fragmentation Print Understanding charge-transfer processes at the atomic level of nanoscale systems is of the utmost importance for designing nanodevices based on quantum-dot structures, nanotubes, or two-dimensional graphene sheets. Researchers from Western Michigan University, Berkeley Lab, and other international research facilities investigated charge-transfer processes and subsequent ion fragmentation dynamics in nanoclusters composed of argon (Ar) shells and xenon (Xe) cores. The clusters were site-selectively ionized (i.e, ionization took place either in the xenon core or in the argon shell). Using a high-resolution photoelectron-ion coincidence technique at ALS Beamlines 10.0.1 and 11.0.2, the researchers concluded that charge-transfer processes and fragmentation dynamics are strongly influenced by the environment of the initially ionized atoms.

25

Formation of single-phase BaO nanoclusters. | EMSL  

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

Instruments: Variable Temperature Scanning Probe Microscope Tags: ultra-high vacuum UHV VT SPM atomic-resolution imaging Volume: 519 Issue: 16 Pages: 5335-5338 Publication...

26

Catalytic photooxidation of pentachlorophenol using semiconductor nanoclusters  

SciTech Connect (OSTI)

Pentachlorophenol (PCP) is a toxic chlorinated aromatic molecule widely used as fungicide, a bactericide and a wood preservation, and thus ubiquitous in the environment. The authors report photo-oxidation of PCP using a variety of nanosize semiconductor metal oxides and sulfides in both aqueous and polar organic solvents and compare the photo-oxidation kinetics of these nanoclusters to widely studied bulk powders like Degussa P-25 TiO{sub 2} and CdS. They study both the light intensity dependence of PCP photooxidation for nanosize SnO{sub 2} and the size dependence of PCP photooxidation for both nanosize SnO{sub 2} and MoS{sub 2}. They find an extremely strong size dependence for the latter which they attribute to its size-dependent band gap and the associated change in redox potentials due to quantum confinement of the hole-electron pair. The authors show that nanosize MoS{sub 2} with a diameter of d=3.0 nm and an absorbance edge of {approximately}450 nm is a very effective photooxidation catalyst for complete PCP mineralization, even when using only visible light irradiation.

WILCOXON,JESS P.

2000-04-17T23:59:59.000Z

27

EMSL - single photon  

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

photon en Structures and Stabilities of (MgO)n Nanoclusters. http:www.emsl.pnl.govemslwebpublicationsstructures-and-stabilities-mgon-nanoclusters

28

CdS nanoclusters doped with divalent atoms  

Science Journals Connector (OSTI)

ZnS and CdS small nanoclusters have been predicted to trap ... studied the structure and stability of (X@(CdS) i ) ±2 with X = Be, Mg, Ca, O, S, Se and i...=9, 12, 15, 16 on the...

Elisa Jimenez-Izal; Jon M. Azpiroz; Riti Gupta…

2014-06-01T23:59:59.000Z

29

Hydrogen storage and delivery mechanism of metal nanoclusters on a nanosheet.  

E-Print Network [OSTI]

??In this study, we used the Density functional theory (DFT) and Molecular dynamics (MD) to obtain the suitable hydrogen storage structure of Rh nanoclusters on… (more)

Huang, Li-Fan

2012-01-01T23:59:59.000Z

30

Ge-nanocluster formation in Ge-doped polysilicon films under oxidation and heat treatment  

Science Journals Connector (OSTI)

An experimental investigation is conducted into the formation Ge nanoclusters by heat treatment of germanosilicate-glass... x Ge y O ...

A. A. Kovalevsky; A. S. Strogova; D. V. Plyakin

2009-03-01T23:59:59.000Z

31

Size Dependence of Atomically Precise Gold Nanoclusters in Chemoselective Hydrogenation and Active Site Structure  

SciTech Connect (OSTI)

We here investigate the catalytic properties of water-soluble Aun(SG)m nanocluster catalysts (H-SG = glutathione) of different sizes, including Au15(SG)13, Au18(SG)14, Au25(SG)18, Au38(SG)24, and captopril-capped Au25(Capt)18 nanoclusters. These Aun(SR)m nanoclusters (-SR represents thiolate generally) are used as homogeneous catalysts (i.e., without supports) in the chemoselective hydrogenation of 4-nitrobenzaldehyde (4-NO2PhCHO) to 4-nitrobenzyl alcohol (4-NO2PhCH2OH) in water with H2 gas (20 bar) as the hydrogen source. These nanocluster catalysts, except Au18(SG)14, remain intact after the catalytic reaction, evidenced by UV-vis spectra which are characteristic of each sized nanoclusters and thus serve as spectroscopic fingerprints . We observe a drastic size-dependence and steric effect of protecting ligands on the gold nanocluster catalysts in the hydrogenation reaction. Density functional theory (DFT) modeling of the 4-nitrobenzaldehyde adsorption shows that both the CHO and NO2 groups are in close interact with the S-Au-S staples on the gold nanocluster surface; the adsorption of the 4-nitrobenzaldehyde molecule on the four different sized Aun(SR)m nanoclusters are moderately strong and similar in strength. The DFT results suggest that the catalytic activity of the Aun(SR)m nanoclusters is primarily determined by the surface area of the Au nanocluster, consistent with the observed trend of the conversion of 4-nitrobenzaldehyde versus the cluster size. Overall, this work offers the molecular insight into the hydrogenation of 4-nitrobenzaldehyde and the catalytically active site structure on gold nanocluster catalysts.

Li, Gao [Carnegie Mellon University (CMU); Jiang, Deen [ORNL; Kumar, Santosh [Carnegie Mellon University (CMU); Chen, Yuxiang [Carnegie Mellon University (CMU); Jin, Rongchao [Carnegie Mellon University (CMU)

2014-01-01T23:59:59.000Z

32

Site-Selective Ionization in Nanoclusters Affects Subsequent Fragmentation  

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

Site-Selective Ionization in Site-Selective Ionization in Nanoclusters Affects Subsequent Fragmentation Site-Selective Ionization in Nanoclusters Affects Subsequent Fragmentation Print Wednesday, 30 June 2010 00:00 Understanding charge-transfer processes at the atomic level of nanoscale systems is of the utmost importance for designing nanodevices based on quantum-dot structures, nanotubes, or two-dimensional graphene sheets. Researchers from Western Michigan University, Berkeley Lab, and other international research facilities investigated charge-transfer processes and subsequent ion fragmentation dynamics in nanoclusters composed of argon (Ar) shells and xenon (Xe) cores. The clusters were site-selectively ionized (i.e, ionization took place either in the xenon core or in the argon shell). Using a high-resolution photoelectron-ion coincidence technique at ALS Beamlines 10.0.1 and 11.0.2, the researchers concluded that charge-transfer processes and fragmentation dynamics are strongly influenced by the environment of the initially ionized atoms.

33

Rapid hydrogen production from water using aluminum nanoclusters: A quantum molecular dynamics simulation study  

E-Print Network [OSTI]

Rapid hydrogen production from water using aluminum nanoclusters: A quantum molecular dynamics Available online 31 December 2013 Keywords: Hydrogen production Water Aluminum nanoclusters Quantum molecular dynamics simulation It is hoped that a hydrogen-on-demand generator may one day start with just

Southern California, University of

34

Size-dependent mobility of gold nano-clusters during growth on chemically modified graphene  

SciTech Connect (OSTI)

Gold nano-clusters were grown on chemically modified graphene by direct sputter deposition. Transmission electron microscopy of the nano-clusters on these electron-transparent substrates reveals an unusual bimodal island size distribution (ISD). A kinetic Monte Carlo model of growth incorporating a size-dependent cluster mobility rule uniquely reproduces the bimodal ISD, providing strong evidence for the mobility of large clusters during surface growth. The cluster mobility exponent of ?5/3 is consistent with cluster motion via one-dimensional diffusion of gold atoms around the edges of the nano-clusters.

Bell, Gavin R., E-mail: gavin.bell@warwick.ac.uk; Dawson, Peter M.; Pandey, Priyanka A.; Wilson, Neil R. [Department of Physics, University of Warwick, Coventry CV4 7AL (United Kingdom); Mulheran, Paul A. [Department of Chemical and Process Engineering, University of Strathclyde, James Weir Building, 75 Montrose St., Glasgow G1 1XJ (United Kingdom)

2014-01-01T23:59:59.000Z

35

Photo-oxidation method using MoS2 nanocluster materials  

DOE Patents [OSTI]

A method of photo-oxidizing a hydrocarbon compound is provided by dispersing MoS.sub.2 nanoclusters in a solvent containing a hydrocarbon compound contaminant to form a stable solution mixture and irradiating the mixture to photo-oxide the hydrocarbon compound. Hydrocarbon compounds of interest include aromatic hydrocarbon and chlorinated hydrocarbons. MoS.sub.2 nanoclusters with an average diameter less than approximately 10 nanometers are shown to be effective in decomposing potentially toxic aromatic and chlorinated hydrocarbons, such as phenol, pentachlorophenol, chlorinated biphenols, and chloroform, into relatively non-toxic compounds. The irradiation can occur by exposing the MoS.sub.2 nanoclusters and hydrocarbon compound mixture with visible light. The MoS.sub.2 nanoclusters can be introduced to the toxic hydrocarbons as either a MoS.sub.2 solution or deposited on a support material.

Wilcoxon, Jess P. (Albuquerque, NM)

2001-01-01T23:59:59.000Z

36

Self-assembly of two-dimensional nanoclusters observed with STM: From surface molecules to surface superstructure  

E-Print Network [OSTI]

Self-assembly of two-dimensional nanoclusters observed with STM: From surface molecules to surface on the Si 111 - 3 3-Ag surface at submonolayer Au coverage. Self-assembly of these Au nanoclusters leads nanoclus- ter are discussed in terms of a substrate-mediated interaction among the Au adatoms, and the self-assembling

Hasegawa, Shuji

37

Stability of nanoclusters in 14YWT oxide dispersion strengthened steel under heavy ion-irradiation by atom probe tomography  

SciTech Connect (OSTI)

14YWT oxide dispersion strengthened (ODS) ferritic steel was irradiated with of 5 MeV Ni2+ ions, at 300 C, 450 C, and 600 C to a damage level of 100 dpa. The stability of Ti–Y–O nanoclusters was investigated by applying atom probe tomography (APT) in voltage mode, of the samples before and after irradiations. The average size and number density of the nanoclusters was determined using the maximum separation method. These techniques allowed for the imaging of nanoclusters to sizes well below the resolution limit of conventional transmission electron microscopy techniques. The most significant changes were observed for samples irradiated at 300 C where the size (average Guinier radius) and number density of nanoclusters were observed to decrease from 1.1 nm to 0.8 nm and 12 1023 to 3.6 1023, respectively. In this study, the nanoclusters are more stable at higher temperature.

Jianchao He; Farong Wan; Kumar Sridharan; Todd R. Allen; A. Certain; V. Shutthanandan; Y.Q. Wu

2014-12-01T23:59:59.000Z

38

Guided Self-Assembly of Au Nanocluster Arrays Electronically Coupled to Semiconductor Device Layers  

E-Print Network [OSTI]

Guided Self-Assembly of Au Nanocluster Arrays Electronically Coupled to Semiconductor Device Layers diameter Au clusters within patterned regions on GaAs device layers, thus demonstrating guided self-assembly ordering of the clusters is achieved by a chemical self- assembly process, while micron scale patterning

39

Guided self-assembly of Au nanocluster arrays electronically coupled to semiconductor device layers  

E-Print Network [OSTI]

Guided self-assembly of Au nanocluster arrays electronically coupled to semiconductor device layers clusters within patterned regions on GaAs device layers, thus demonstrating guided self-assembly ordering of the clusters is achieved by a chemical self-assembly process, while micron scale patterning

Woodall, Jerry M.

40

Water as Buffer Material for Gold Nanocluster Growth Elad Gross, Yonatan Horowitz, and Micha Asscher*  

E-Print Network [OSTI]

in the same buffer layer thickness range. Significantly different morphology of the clusters is obtained when are the basis for industrial heterogeneous catalysis.1-4 Gold nanoclusters held on oxide substrates were silicon oxide, SiO2/ Si(100), was chosen as the substrate in this study as a model for silica supports

Asscher, Micha

Note: This page contains sample records for the topic "nanoclusters out-perform single" 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

Formation and electronic states of In nanoclusters on the Si(111)-7×7 surface  

Science Journals Connector (OSTI)

The formation and evolution of submonolayer In clusters on the Si(111)-7×7 surface at different temperatures were investigated using scanning tunneling microscopy. The electronic states of the well-defined nanoclusters were studied by scanning tunneling spectroscopy (STS). The well-ordered triangular In “magic” clusters are formed at ?200?°C within 7×7 half-unit cells as reported previously. The STS measurement reveals the semiconducting property of In magic clusters with a substantial energy gap of 0.8 eV in accordance with the recent photoemission study. The band gap is very asymmetric with a shallow unoccupied state due to the pseudomolecular orbitals of the In-Si bond network, as revealed by the density-functional calculation for the existing structure model with six In atoms. The electronic modification of Si adatoms in the neighboring sites was observed. At a lower temperature than that of the magic cluster formation, we observed a different type of nanoclusters formed in faulted half-unit cells with an identical size. This cluster has a characteristic asymmetric shape with chirality. These nanoclusters are thought to consist of a similar number of In atoms and are the precursory state to the magic cluster formation. The STS result for the initial cluster shows a distinct semiconducting property with a significantly reduced band gap of 0.4 eV.

Jung Hoon Byun; Jin Sung Shin; Pil Gyu Kang; Hojin Jeong; Han Woong Yeom

2009-06-16T23:59:59.000Z

42

Growth and characterization of barium oxide nanoclusters on YSZ...  

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

that the BaO grows as clusters on YSZ(111). During and following the growth under UHV conditions, BaO remains in single phase. When exposed to ambient conditions, the...

43

Restructuring of hex-Pt(100) under CO gas environments: formation of 2-D nanoclusters  

SciTech Connect (OSTI)

The atomic-scale restructuring of hex-Pt(100) induced by carbon monoxide with a wide pressure range was studied with a newly designed chamber-in-chamber high-pressure STM and theoretical calculations. Both experimental and DFT calculation results show that CO molecules are bound to Pt nanoclusters through a tilted on-top configuration with a separation of {approx}3.7-4.1 {angstrom}. The phenomenon of restructuring of metal catalyst surfaces induced by adsorption, and in particular the formation of small metallic clusters suggests the importance of studying structures of catalyst surfaces under high pressure conditions for understanding catalytic mechanisms.

Tao, Feng; Dag, Sefa; Wang, Lin-Wang; Liu, Zhi; Butcher, Derek; Salmeron, Miquel; Somorjai, Gabor A.

2009-04-24T23:59:59.000Z

44

Spin Dynamics in Two-Dimensional Arrays of Quantum Dots with Local Ordering of Nanoclusters  

SciTech Connect (OSTI)

Electron paramagnetic resonance (EPR) is used to probe the spin dynamics in two-dimensional (2D) quantum dot (QD) arrays with local ordering of nanoclusters. A careful examination of EPR line shape, width and g-factor values allow us to attribute this signal to the electrons localized in the strain-induced potential wells in Si in the vicinity of the Ge dots. The strong orientation dependence of EPR line width is defined by changing localization degree of electrons at different magnetic field directions. The theoretical approximation of orientation dependence of EPR line width allows estimating the effective radius of electron localization, as {approx}80 nm.

Zinovieva, A. F.; Dvurechenskii, A. V.; Stepina, N. P.; Nikiforov, A. I.; Lyubin, A. S. [Institute of Semiconductor Physics, 630090 Novosibirsk, pr. Lavrentieva 13 (Russian Federation); Sobolev, N.; Carmo, M. C. [Departamento de Fisica e I3N, Universidade de Aveiro, Aveiro (Portugal)

2011-12-23T23:59:59.000Z

45

Ternary PtSnRhSnO2 nanoclusters: synthesis and electroactivity for ethanol oxidation fuel cell reaction  

E-Print Network [OSTI]

Ternary PtSnRh­SnO2 nanoclusters: synthesis and electroactivity for ethanol oxidation fuel cell a superior long-term activity and stability towards ethanol oxidation than the commercial Pt catalyst. Our. Ethanol becomes an attractive fuel in the fuel cell reactions compared with methanol and hydrogen, because

Frenkel, Anatoly

46

CO Oxidation at the Au-Cu Interface of Bimetallic Nanoclusters Supported on CeO2(111)  

E-Print Network [OSTI]

of tunable interfaces, metal and oxide,9,12,15-18 metal and carbide,19 and oxide and oxide,2 of the structure of CeO2(111)-supported Au- based bimetallic nanoclusters (NCs) show that a strong support-metal Materials, and Catalysis The critical role of the interface between a supporting oxide and supported metal

Henkelman, Graeme

47

Magnetic and magnetoresistance measurements on iron-based nanoclusters in In0.53Ga0.47As  

E-Print Network [OSTI]

Magnetic and magnetoresistance measurements on iron-based nanoclusters in In0.53Ga0.47As T. M://scitation.aip.org/termsconditions. Downloaded to ] IP: 169.237.74.113 On: Wed, 15 Jan 2014 20:59:30 #12;Magnetic and magnetoresistance anneal. Magnetic measurements confirm the formation of a cluster size distribution with a mean diameter

Woodall, Jerry M.

48

Atomistic modeling of the directed-assembly of bimetallic Pt-Ru nanoclusters on Ru(0001)-supported monolayer graphene  

E-Print Network [OSTI]

)-supported monolayer graphene Yong Han,1 Albert K. Engstfeld,2 R. Juergen Behm,2 and James W. Evans1,3,* 1 of Pt-Ru nanoclusters (NC's) by sequential deposition of Pt and Ru on a periodically rumpled graphene. The periodic variation of the adsorption energy across the graphene sheet directs the assembly of NC

Ulm, Universität

49

Photonic crystal light emitting diode based on Er and Si nanoclusters co-doped slot waveguide  

SciTech Connect (OSTI)

We report on the design, fabrication, and electro-optical characterization of a light emitting device operating at 1.54??m, whose active layer consists of silicon oxide containing Er-doped Si nanoclusters. A photonic crystal (PhC) is fabricated on the top-electrode to enhance the light extraction in the vertical direction, and thus the external efficiency of the device. This occurs if a photonic mode of the PhC slab is resonant with the Er emission energy, as confirmed by theoretical calculations and experimental analyses. We measure an increase of the extraction efficiency by a factor of 3 with a high directionality of light emission in a narrow vertical cone. External quantum efficiency and power efficiency are among the highest reported for this kind of material. These results are important for the realization of CMOS-compatible efficient light emitters at telecom wavelengths.

Lo Savio, R.; Galli, M.; Liscidini, M.; Andreani, L. C. [Dipartimento di Fisica, Università di Pavia, Via Bassi 6, 27100 Pavia (Italy); Franzò, G.; Iacona, F.; Miritello, M. [MATIS-IMM CNR and Dipartimento di Fisica e Astronomia, Università di Catania, via S. Sofia 64, 95123 Catania (Italy); Irrera, A. [CNR-IPCF, Viale Ferdinando Stagno d'Alcontres 37, 98158 Messina (Italy); Sanfilippo, D.; Piana, A. [ST Microelectronics, Stradale Primosole 50, 95121 Catania (Italy); Priolo, F. [MATIS-IMM CNR and Dipartimento di Fisica e Astronomia, Università di Catania, via S. Sofia 64, 95123 Catania (Italy); Scuola Superiore di Catania, Università di Catania, Via Valdisavoia 9, 95123 Catania (Italy)

2014-03-24T23:59:59.000Z

50

Determination of nanoparticle structure type, size and strain distribution from X-ray data for monatomic f.c.c.-derived non-crystallographic nanoclusters  

Science Journals Connector (OSTI)

Whole-profile-fitting least-squares techniques are successfully applied to simulated and experimental diffraction patterns of monatomic f.c.c.-derived non-crystallographic nanoclusters, with the aim of extracting information about structure-type concentration, size and strain distribution.

Cervellino, A.

2003-09-08T23:59:59.000Z

51

DFT studies of Indium Nanoclusters (Inn where n=3-10) and Nanotube and their interaction with molecular hydrogen  

E-Print Network [OSTI]

Density functional theory calculations have been performed on Indium nanoclusters (Inn, n= 3 to 10) to explore the relative stability among their different isomers and interaction with H2. Geometry optimizations starting from initial candidate geometries were performed for each cluster size, so as to determine a few low energy isomers for each size. Clusters with planar configuration and high symmetry are found to be more stable. For n=8 there comes transition from 2D to 3D structures, which formed by stacking of planar rings are most stable. Energetically favorable isomers of indium nanoclusters for each size were considered to get H2 adsorbed. In general H2 interaction with these clusters is week but with odd index i.e. 5, 7 and 9 is significant. Indium nanotube also indicates H2 adsorption but Eads increases many folds on introduction of defect in the tube. On basis of these DFT studies we propose indium nanotubes and clusters of particular size appear to be good candidate for hydrogen storage materials.

Baig, Mirza Wasif; Ahmad, Idrees; Siddiq, Muhammad

2014-01-01T23:59:59.000Z

52

The Effect of Strain on the Stabilization of Oxygen-Enriched Nanoclusters in Fe-Based Alloys  

SciTech Connect (OSTI)

First-principles theory has been developed to understand the unique material state underlying the ultra stability of O-enriched (with Ti and Y solute additions) nanoclusters (NCs) observed in Fe. We show that an essential condition for stabilizing these NCs is a higher O binding energy on the interface (E_S) than in the interior (E_B) of the NCs. The difference between E_B and E_S is due to the effect of strain, originating from the solute-solute repulsion and the presence of O in the form of O-vacancy pair. The strain is also important in controlling the size of NCs which are predicted to exist only within a narrow O concentration range.

Zhao, Huijuan [ORNL; Fu, Chong Long [ORNL; Krcmar, Maja [Grand Valley State University (GVSU), Michigan; Miller, Michael K [ORNL

2011-01-01T23:59:59.000Z

53

Electronic and magnetic properties of Co_n Mo_m nanoclusters with n+m = x and 2<=x<=6 atoms from DFT calculations  

E-Print Network [OSTI]

We present the results of the density functional theory study of Co_n Mo_m nanoclusters with n+m=x and 2content and increases with increasing n. The magnetic anisotropy on the other hand becomes smaller for larger magnetic moments S. We observe an increase in the binding energy, electron affinity, and average bond length with increasing cluster size as well as a decrease in the ionization potential, chemical potential, molecular hardness and the HOMO-LUMO gap.

Liebing, Simon; Trepte, Kai; Kortus, Jens

2014-01-01T23:59:59.000Z

54

In-situ Spectroscopy of Water Oxidation at Ir Oxide Nanocluster Drivenby Visible TiOCr Charge-Transfer Chromophore in Mesoporous Silica  

SciTech Connect (OSTI)

An all-inorganic photocatalytic unit consisting of a binuclear TiOCr charge-transfer chromophore coupled to an Ir oxide nanocluster has been assembled on the pore surface of mesoporous silica AlMCM-41. In situ FT-Raman and EPR spectroscopy of an aqueous suspension of the resulting IrxOy-TiCr-AlMCM-41 powder reveal the formation of superoxide species when exciting the Ti(IV)OCr(III) --> Ti(III)OCr(IV) metal-to-metal charge-transfer chromophore with visible light. Use of H218O confirms that the superoxide species originates from oxidation of water. Photolysis in the absence of persulfate acceptor leads to accumulation of Ti(III) instead. The results are explained by photocatalytic oxidation of water at Ir oxide nanoclusters followed by trapping of the evolving O2 by transient Ti(III) centers to yield superoxide. Given the flexibility to select donor metals with appropriate redox potential, photocatalytic units consisting of a binuclear charge-transfer chromophore coupled to a water oxidation catalyst shown here constitute a step towards thermodynamically efficient visible light water oxidation units.

Frei, Heinz; Han, Hongxian; Frei, Heinz

2008-06-03T23:59:59.000Z

55

Thiolate ligands as a double-edged sword for CO oxidation on CeO2-supported Au25(SR)18 nanoclusters  

SciTech Connect (OSTI)

The effect of thiolate ligands was explored on the catalysis of CeO2-rod supported Au25(SR)18 (SR = -SCH2-CH2-Ph) by using CO oxidation as a probe reaction. Reaction kinetic tests, in situ IR and X-ray absorption spectroscopy, and density functional theory (DFT) were employed to understand how the thiolate ligands affect the nature of active sites, activation of CO and O2, as well as the reaction mechanism and kinetics. The intact Au25(SR)18 on CeO2-rod is found not able to adsorb CO. Only when the thiolate ligands are partially removed, starting from the interface between Au25(SR)18 and CeO2 at temperatures of 423 K and above, can the adsorption of CO be observed by IR. DFT calculations suggest that CO adsorbs favorably on the exposed gold atoms. Accordingly, the CO oxidation light-off temperature shifts to lower temperature. Several types of Au sites are probed by IR of CO adsorption during the ligand removal process. The cationic Au sites (charged between 0 and +1) are found to play the major role for low temperature CO oxidation. Similar activation energy and reaction rate are found for CO oxidation on differently treated Au25(SR)18/CeO2-rod, suggesting a simple site-blocking effect of the thiolate ligands in Au nanoclusters catalysis. Isotopic labelling experiments clearly indicate that CO oxidation on Au25(SR)18/CeO2-rod proceeds predominantly via the redox mechanism where CeO2 activates O2 while CO is activated on the de-thiolated gold sites. These results points to a double-edged sword role played by the thiolate ligands on Au25 nanoclusters for CO oxidation.

Wu, Zili [ORNL; Jiang, Deen [ORNL; Mann, Amanda K [ORNL; Mullins, David R [ORNL; Qiao, Zhen-an [University of Tennessee, Knoxville (UTK); Allard Jr, Lawrence Frederick [ORNL; Zeng, Chenjie [Carnegie Mellon University (CMU); Jin, Rongchao [Carnegie Mellon University (CMU); Overbury, Steven {Steve} H [ORNL

2014-01-01T23:59:59.000Z

56

Roles of nanoclusters in shear banding and plastic deformation of bulk metallic glasses  

SciTech Connect (OSTI)

During the course of this research we published 33 papers in various physics/material journals. We select four representing papers in this report and their results are summarized as follows. I. To study shear banding process, it is pertinent to know the intrinsic shear strain rate within a propagating shear band. To this aim, we used nanoindentation technique to probe the mechanical response of a Au49Ag5.5Pd2.3Cu26.9Si16.3 bulk metallic glass in locality and found notable pop-in events associated with shear band emission. Using a free volume model and under the situation when temperature and stress/hardness are fixed result in an equation, which predicts that hardness serration caused by pop-in decreases exponentially with the strain rate. Our data are in good agreement with the prediction. The result also predicts that, when strain rate is higher than a critical strain rate of 1700 s^-1, there will be no hardness serration, thereby no pop-in. In other words, multiple shear bandings will take place and material will flow homogeneously. The critical strain rate of 1700 s^-1 can be treated as the intrinsic strain rate within a shear band. We subsequently carried out a simulation study and showed that, if the imposed strain rate was over , the shear band spacing would become so small that the entire sample would virtually behave like one major shear band. Using the datum strain rate =1700 s^-1 and based on a shear band nucleation model proposed by us, the size of a shear-band nucleus in Au-BMG was estimated to be 3 ���� 10^6 atoms, or a sphere of ~30 nm in diameter. II. Inspired by the peculiar result published in a Science article �¢����Super Plastic Bulk Metallic Glasses at Room Temperature�¢���, we synthesized the Zr-based bulk metallic glass with a composition identical to that in the paper (Zr64.13Cu15.75Ni10.12Al10) and, subsequently, tested in compression at the same slow strain rate (~10^-4 s^-1). We found that the dominant deformation mode is always single shear. The stress-strain curve exhibited serrated pattern in the plastic region, which conventionally has been attributed to individual shear band propagation. The scanning electron micrographs taken from the deformed sample surface revealed regularly spaced striations. Analysis indicates that the observed stress-strain serrations are intimately related to the striations on the shear surface, suggesting the serrations were actually caused slip-and-stick shear along the principal shear plane. We further use video camera to conduct in situ compression experiments to unambiguously confirm the one-to-one temporal and spatial correspondence between the intermittent sliding and flow serration. This preferential shear band formation along the principal shear plane is, in fact, a natural consequence of Mode II crack, independent of strain softening or hardening, usually claimed in the literature. III. Flow serration in compression of metallic glasses is caused by the formation and propagation of localized shear bands. These shear bands propagate at an extremely high speed, so high that a load cell and load frame were unable to capture the details of the dynamic event. To subdue this problem, we conducted uniaxial compression on Zr64.13Cu15.75Ni10.12Al10 bulk metallic glass using a high-speed camera to capture the sample image and also high-sensitivity strain gauges attached to the test samples to directly measure the strain. The displacement-time curves obtained from the test and a magnified version of the displacement burst reveals clearly a three-step (acceleration, steady-state, and deceleration) process during shear band propagation. The fastest propagating speed occurring at the steady state is calculated as 8����10^2 ���µm/s. This speed is about 1,000 times faster than the crosshead speed. This explains the gradual disappearance of flow serration at higher strain rates previously reported during compression of

Nieh, T.G.

2012-07-31T23:59:59.000Z

57

Single-Use Recycling  

Science Journals Connector (OSTI)

Single-use recycling is specially used oil treatment, generating recycled product for a single finite reuse.

2014-01-01T23:59:59.000Z

58

Visible Light-Driven Water Oxidation by Ir oxide Clusters Coupledto Single Cr Centers in Mesoporous Silica  

SciTech Connect (OSTI)

Visible light-induced water oxidation has been demonstrated at an Ir oxide nanocluster coupled to a single Cr{sup VI} site on the pore surface of MCM-41 mesoporous silica. The photocatalytic unit was assembled by the reaction of surface Cr=O groups with Ir(acac){sub 3} precursor followed by calcination at 300 C and bond formation monitored by FT-Raman and FT-IR spectroscopy. High-resolution Z-contrast electron micrographs of the calcined material combined with energy-dispersive X-ray spot analysis confirmed the occlusion of Ir oxide nanoparticles inside the mesopores. Oxygen evolution of an aqueous suspension of the Ir{sub x}O{sub y}-CrMCM-41 upon visible light irradiation of the Cr{sup VI}-O ligand-to-metal charge-transfer absorption was monitored mass-spectrometrically. Comparison of the product yields for samples with low Cr content (Cr/Si {le} 0.02) and high Cr content (Cr/Si = 0.05) indicates that only isolated Cr centers are capable of extracting electrons from Ir oxide clusters, while di- or polychromate species are not. Water oxidation at a multielectron-transfer catalyst coupled to a single metal center has not been demonstrated before. The ability to drive water oxidation with a single metal center as electron pump offers opportunities for coupling the oxygen-evolving photocatalytic unit to reducing sites in the nanoporous scaffold.

Nakamura, Ryuhei; Frei, Heinz

2006-07-10T23:59:59.000Z

59

Single-Molecule Detection  

Science Journals Connector (OSTI)

Detection of single molecules represents the ultimate level of sensitivity and ... background, fluorescence is one obvious choice for single-molecule detection (SMD). However, SMD using ... first report on SMD us...

2006-01-01T23:59:59.000Z

60

mathematics single cycle  

E-Print Network [OSTI]

47 mathematics education single cycle master's study programme #12;48 single cycle master's study program in Mathematics Education #12;49 single cycle master's study program in Mathematics Education MATHEMATICS EDUCATION The program is in tune with the principles of the Bologna Declaration. · Academic title

Â?umer, Slobodan

Note: This page contains sample records for the topic "nanoclusters out-perform single" from the National Library of EnergyBeta (NLEBeta).
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to obtain the most current and comprehensive results.


61

Influence of the nature of iron, aluminium and yttrium organometallic nanocluster precursors on the formation mechanism of ceramic ZrO2 obtained by sol-gel method  

Science Journals Connector (OSTI)

To obtain new effective precursors for single phase ceramic zirconia materials by the alkoxide route, three heterometallic iron-yttrium acetylacetonate complexes were synthesized by electrochemical anodic dissolu...

O. G. Ellert; I. A. Petrunenko; M. V. Tsodikov…

1997-01-01T23:59:59.000Z

62

Influence of the Nature of Iron, Aluminium and Yttrium Organometallic Nanocluster Precursors on the Formation Mechanism of Ceramic ZrO2 Obtained by Sol-Gel Method  

Science Journals Connector (OSTI)

To obtain new effective precursors for single phase ceramic zirconia materials by the alkoxide route, three heterometallic iron-yttrium acetylacetonate complexes were synthesized by electrochemical anodic dissolu...

O.G. Ellert; I.A. Petrunenko; M.V. Tsodikov…

1997-01-01T23:59:59.000Z

63

Semiconductor Nanoclusters as Potential Photocatalysts  

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

High Power Electronics Based on the 2-Dimensional Electron Gas in GaN High Power Electronics Based on the 2-Dimensional Electron Gas in GaN Heterostructures by S. R. Kurtz, A. A. Allerman, and D. Koleski Motivation-GaN-based electronics offer miniaturization potential of radical proportions for microwave power amplifiers. GaN's large bandgap, high breakdown field, high electron velocity, and excellent thermal properties have led to high electron mobility transistors (HEMT) with up to 10x the power density of GaAs and other traditional semiconductors at frequencies up to 20 GHz. Further contributing to the outstanding performance of GaN-based amplifiers is the highly conducting, 2-dimensional electron gas (2DEG) used for the HEMT channel. Intrinsic polarization and piezoelectric properties of GaN materials can produce a 2DEG at an

64

Semiconductor Nanoclusters as Potential Photocatalysts  

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

0001 0001 Transport and Kinetic Processes in GaN Epitaxial Lateral Overgrowth M. E. Coltrin and C. C. Mitchell Motivation-GaN is a wide band gap semi- conductor with a broad range of potential appli- cations, e.g., high-temperature electronics, op- telectronics, chemical or biological sensors. GaN thin films usually have a high defect den- sity, leading to poor performance. Epitaxial Lat- eral Overgrowth (ELO) has been shown to greatly reduce defect densities, often by factors of 100 or more. We are conducting fundamental studies of GaN growth kinetics during ELO. Accomplishment-In ELO, a mask pattern of dielectric material is deposited on top of a GaN buffer layer. Further growth of GaN occurs se- lectively on exposed areas of the underlying buffer layer, and not on the dielectric material.

65

Semiconductor Nanoclusters as Potential Photocatalysts  

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

Development of Cantilever Epitaxy to Produce High Quality GaN with Reduced Development of Cantilever Epitaxy to Produce High Quality GaN with Reduced Threading Dislocation Densities by C. C. Mitchell, A. A. Allerman, C. I. H. Ashby, R. D. Briggs, D. M. Follstadt, S. L. Lee, D. D. Koleske Motivation-GaN grown on any currently available substrates has an inherent problem of having to overcome a large lattice mismatch with the substrate. As a result typical planar GaN includes anywhere from 10 8 - 10 10 threading dislocations per square centimeter. Cantilever epitaxy (CE) is a technique developed to produce areas of GaN with a reduced number of vertical threading dislocations (VTDs) over large areas. Low defect materials are required to reduce leakage and breakdown of both electronic and opto- electronic devices. Accomplishment-This

66

Single-Molecule Chemistry  

Science Journals Connector (OSTI)

With the currently available optical facilities, it is now possible to observe the dynamic behavior of single biomolecules and to study their kinetics. Within a group of molecules (e.g., in an enzyme), ... static...

2008-01-01T23:59:59.000Z

67

SINGLE CRYSTAL NEUTRON DIFFRACTION.  

SciTech Connect (OSTI)

Single-crystal neutron diffraction measures the elastic Bragg reflection intensities from crystals of a material, the structure of which is the subject of investigation. A single crystal is placed in a beam of neutrons produced at a nuclear reactor or at a proton accelerator-based spallation source. Single-crystal diffraction measurements are commonly made at thermal neutron beam energies, which correspond to neutron wavelengths in the neighborhood of 1 Angstrom. For high-resolution studies requiring shorter wavelengths (ca. 0.3-0.8 Angstroms), a pulsed spallation source or a high-temperature moderator (a ''hot source'') at a reactor may be used. When complex structures with large unit-cell repeats are under investigation, as is the case in structural biology, a cryogenic-temperature moderator (a ''cold source'') may be employed to obtain longer neutron wavelengths (ca. 4-10 Angstroms). A single-crystal neutron diffraction analysis will determine the crystal structure of the material, typically including its unit cell and space group, the positions of the atomic nuclei and their mean-square displacements, and relevant site occupancies. Because the neutron possesses a magnetic moment, the magnetic structure of the material can be determined as well, from the magnetic contribution to the Bragg intensities. This latter aspect falls beyond the scope of the present unit; for information on magnetic scattering of neutrons see Unit 14.3. Instruments for single-crystal diffraction (single-crystal diffractometers or SCDs) are generally available at the major neutron scattering center facilities. Beam time on many of these instruments is available through a proposal mechanism. A listing of neutron SCD instruments and their corresponding facility contacts is included in an appendix accompanying this unit.

KOETZLE,T.F.

2001-03-13T23:59:59.000Z

68

Single Particle Laser Ablation | EMSL  

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

Single Particle Laser Ablation Single Particle Laser Ablation Leads No leads are available at this time. Effect of Solar Radiation on the Optical Properties and Molecular...

69

Single-exciton nanocrystal laser  

DOE Patents [OSTI]

A laser system employing amplification via a single exciton regime and to optical gain media having single exciton amplification is provided.

Klimov, Victor I. (Los Alamos, NM); Ivanov, Sergei A. (Albuquerque, NM)

2012-01-17T23:59:59.000Z

70

Single rotor turbine engine  

DOE Patents [OSTI]

There has been invented a turbine engine with a single rotor which cools the engine, functions as a radial compressor, pushes air through the engine to the ignition point, and acts as an axial turbine for powering the compressor. The invention engine is designed to use a simple scheme of conventional passage shapes to provide both a radial and axial flow pattern through the single rotor, thereby allowing the radial intake air flow to cool the turbine blades and turbine exhaust gases in an axial flow to be used for energy transfer. In an alternative embodiment, an electric generator is incorporated in the engine to specifically adapt the invention for power generation. Magnets are embedded in the exhaust face of the single rotor proximate to a ring of stationary magnetic cores with windings to provide for the generation of electricity. In this alternative embodiment, the turbine is a radial inflow turbine rather than an axial turbine as used in the first embodiment. Radial inflow passages of conventional design are interleaved with radial compressor passages to allow the intake air to cool the turbine blades.

Platts, David A. (Los Alamos, NM)

2002-01-01T23:59:59.000Z

71

Single-Walle 4. Single-Walled Carbon Nanotubes  

E-Print Network [OSTI]

applications, carbon nanotube research is ac- tively being pursued in diverse areas including energy storage105 Single-Walle 4. Single-Walled Carbon Nanotubes Sebastien Nanot, Nicholas A. Thompson, Ji Single-walled carbon nanotubes (SWCNTs) are hol- low, long cylinders with extremely large aspect ratios

Kono, Junichiro

72

Single molecule fluorescence (the basics)  

E-Print Network [OSTI]

Single molecule fluorescence (the basics) #12;light time light time No averaging, no need;knrkr S0 S1 Iph . . Iexc #12;Single molecule emitters #12;K. Brejc et.al., PNAS 94 (1997) 2306 1 nm glass, notch holographic, multidielectric,... #12;Optical schemes to detect single molecules Excitation

Ritort, Felix

73

Single-Nucleon Densities  

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

Densities Densities This web page presents single-nucleon densities calculated for a variety of nuclei in the range A=2-10 with some preliminary results for A=11,12. These are from variational Monte Carlo calculations (VMC) using the Argonne v18 two-nucleon and Urbana X three-nucleon potentials (AV18+UX). (Urbana X is intermediate between the Urbana IX and Illinois-7 models; it has the form of UIX supplemented with a two-pion S-wave piece, while the strengths of its terms are taken from the IL7 model. It does NOT have the three-pion-ring term of IL7.) These VMC wave functions are the starting trial functions for a number of recent Green's function Monte Carlo (GFMC) calculations: Brida, et al., Phys. Rev. C 84, 024319 (2011); McCutchan, et al., Phys. Rev. C 86, 024315 (2012);

74

Single-Column Modeling  

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

C.J. Somerville and S. F. lacobellis C.J. Somerville and S. F. lacobellis Climate Research Division Scripps Institution of Oceanography University of California, San Diego La Jolla, CA 92093-0224 Our project is centered around a computationally efficient and economical one-dimensional (vertical) model, resembling a single column of a general circulation model (GCM) grid, applied to the experimental site of the Atmospheric Radiation Measurement (ARM) Program. The model contains a full set of modern GCM parameterizations of subgrid physical processes. To force the model, the advective terms in the budget equations are specified observationally from operational numerical weather prediction analyses. These analyses, based on four-dimensional data assimilation techniques, provide dynamically consistent wind fields and horizontal gradients

75

Single molecule laser spectroscopy  

Science Journals Connector (OSTI)

Abstract In this article, we discussed some single molecule spectroscopy techniques and methods. We have chosen the simplicity in this survey based on our laboratory experience in this field. We concentrated on the imaging by both techniques the wide field and the scanning microscopes. Other imaging enhancements on the technique like extended resolution wide field, the total internal reflection imaging, and its derivatives are also reviewed. In addition to the imaging techniques, some diffusion techniques also are discussed like fluorescence correlation spectroscopy. The related methods like Forester resonance transfer, photo-induced electron transfer and anisotropy (steady state and time decay) are also discussed. In addition, we elucidated some simple details about the theory behind the FCS and its resulting curve fitting. This review is preceded by general introduction and ended with the conclusion.

Diaa Atta; Ali Okasha

2015-01-01T23:59:59.000Z

76

Single-Photon Spectroscopy of a Single Molecule  

Science Journals Connector (OSTI)

Efficient interaction of light and matter at the ultimate limit of single photons and single emitters is of great interest from a fundamental point of view and for emerging applications in quantum engineering. However, the difficulty of generating single-photon streams with specific wavelengths, bandwidths, and power as well as the weak interaction probability of a single photon with an optical emitter pose a formidable challenge toward this goal. Here, we demonstrate a general approach based on the creation of single photons from a single emitter and their use for performing spectroscopy on a second emitter situated at a distance. While this first proof of principle realization uses organic molecules as emitters, the scheme is readily extendable to quantum dots and color centers. Our work ushers in a new line of experiments that provide access to the coherent and nonlinear couplings of few emitters and few propagating photons.

Y. L. A. Rezus; S. G. Walt; R. Lettow; A. Renn; G. Zumofen; S. Götzinger; V. Sandoghdar

2012-02-27T23:59:59.000Z

77

Single-Molecule Studies of Gene Expression  

E-Print Network [OSTI]

material for the single-molecule transcription experimentsGeometry for the single-molecule assay of bare DNAgeometry for the single-molecule translation assay .

Hodges, Hamilton Courtney

2009-01-01T23:59:59.000Z

78

Fluorescence, Single-Molecule Microscope | EMSL  

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

Single-Molecule Microscope Fluorescence, Single-Molecule Microscope The single-molecule optical microscope is designed to study complex reaction dynamics such as enzymatic...

79

Nanometer Resolution Imaging by SIngle Molecule Switching. |...  

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

Nanometer Resolution Imaging by SIngle Molecule Switching. Nanometer Resolution Imaging by SIngle Molecule Switching. Abstract: The fluorescence intensity of single molecules can...

80

High Throughput Single Molecule Investigation of Transcription  

E-Print Network [OSTI]

genomic DNA based on single-molecule detection. Analyticalmapping: a novel, single- molecule approach to genomic2011). High-throughput single-molecule optofluidic analysis.

Kim, Soohong

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "nanoclusters out-perform single" 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

Single Top production at LHC  

E-Print Network [OSTI]

The Production of single top quarks at LHC provides an ideal framework to investigate the properties of electroweak interaction, in particular of the {\\it tWb} coupling. Moreover, single top is a powerful mean to identify physics beyond the standard model. All three different production mechanisms of single top are expected to be observed at LHC. Recent studies from ATLAS and CMS are presented.

M. Mohammadi Najafabadi

2006-05-12T23:59:59.000Z

82

EMSL - Single Particle Laser Ablation  

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

single-particle-laser-ablation en Effect of Solar Radiation on the Optical Properties and Molecular Composition of Laboratory Proxies of Atmospheric Brown Carbon http:...

83

Nanochannel based single molecule recycling.  

E-Print Network [OSTI]

??Single molecule fluorescence measurements provide detailed information about sub-populations, transition intermediates and kinetic data for systems that are not able to be synchronized by removing… (more)

Lesoine, John Frederick (1980 - )

2010-01-01T23:59:59.000Z

84

Heralded single photon absorption by a single atom  

E-Print Network [OSTI]

The emission and absorption of single photons by single atomic particles is a fundamental limit of matter-light interaction, manifesting its quantum mechanical nature. At the same time, as a controlled process it is a key enabling tool for quantum technologies, such as quantum optical information technology [1, 2] and quantum metrology [3, 4, 5, 6]. Controlling both emission and absorption will allow implementing quantum networking scenarios [1, 7, 8, 9], where photonic communication of quantum information is interfaced with its local processing in atoms. In studies of single-photon emission, recent progress includes control of the shape, bandwidth, frequency, and polarization of single-photon sources [10, 11, 12, 13, 14, 15, 16, 17], and the demonstration of atom-photon entanglement [18, 19, 20]. Controlled absorption of a single photon by a single atom is much less investigated; proposals exist but only very preliminary steps have been taken experimentally such as detecting the attenuation and phase shift of a weak laser beam by a single atom [21, 22], and designing an optical system that covers a large fraction of the full solid angle [23, 24, 25]. Here we report the interaction of single heralded photons with a single trapped atom. We find strong correlations of the detection of a heralding photon with a change in the quantum state of the atom marking absorption of the quantum-correlated heralded photon. In coupling a single absorber with a quantum light source, our experiment demonstrates previously unexplored matter-light interaction, while opening up new avenues towards photon-atom entanglement conversion in quantum technology.

Nicolas Piro; Felix Rohde; Carsten Schuck; Marc Almendros; Jan Huwer; Joyee Ghosh; Albrecht Haase; Markus Hennrich; Francois Dubin; Jürgen Eschner

2010-04-23T23:59:59.000Z

85

Quantitative biology of single neurons  

Science Journals Connector (OSTI)

...1930-1931. 25 Pawley, J. B. 2006 Handbook of biological confocal microscopy. New...NY: Springer. 26 Grupen, C. 2011 Handbook of particle detection and imaging. New...biological systems are single cells. Fundamental insights gained from single-cell analysis...

2012-01-01T23:59:59.000Z

86

Single spin asymmetries in QCD  

E-Print Network [OSTI]

Measurements of single transverse spin asymmetries in high energy inclusive processes have always shown unexpected and challenging results. Several cases are considered and discussed within a QCD approach which couples perturbative dynamics to new non perturbative partonic information; the aim is that of developing a consistent phenomenological description of these unusual single spin phenomena, based on a generalized QCD factorization scheme.

Mauro Anselmino

2002-01-16T23:59:59.000Z

87

Electrochemical Quantification of Single Nucleotide Polymorphisms...  

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

Quantification of Single Nucleotide Polymorphisms Using Nanoparticle Probes. Electrochemical Quantification of Single Nucleotide Polymorphisms Using Nanoparticle Probes. Abstract:...

88

Single Cell Whole Genome Amplification  

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

Single Cell Whole Genome Amplification Single Cell Whole Genome Amplification of Uncultivated Organisms Mircea Podar , Martin Keller , and Philip Hugenholtz (* ü ) Abstract Whole genome amplification of single cells is emerging as a powerful technique for accessing the genomes of individual members of microbial communi- ties without the complication of identifying the source of sequence data posed by shotgun sequencing of environmental samples (metagenomics). This method holds particular promise for the molecular unveiling of uncultivated organisms that com- prise the bulk of the microbial diversity and functionality on our planet. 1 Introduction Over the last two decades, it has become increasingly apparent that microbial diversity

89

Single nanoparticle tracking spectroscopic microscope  

DOE Patents [OSTI]

A system that can maintain and track the position of a single nanoparticle in three dimensions for a prolonged period has been disclosed. The system allows for continuously imaging the particle to observe any interactions it may have. The system also enables the acquisition of real-time sequential spectroscopic information from the particle. The apparatus holds great promise in performing single molecule spectroscopy and imaging on a non-stationary target.

Yang, Haw (Moraga, CA); Cang, Hu (Berkeley, CA); Xu, Cangshan (Berkeley, CA); Wong, Chung M. (San Gabriel, CA)

2011-07-19T23:59:59.000Z

90

Single axioms for Boolean algebra.  

SciTech Connect (OSTI)

Explicit single axioms are presented for Boolean algebra in terms of (1) the Sheffer stroke; (2) disjunction and negation; (3) disjunction, conjunction, and negation; and (4) disjunction, conjunction, negation, 0, and 1. It was previously known that single axioms exist for these systems, but the procedures to generate them are exponential, producing huge equations. Automated deduction techniques were applied to find axioms of lengths 105, 131, 111, and 127, respectively, each with six variables.

McCune, W.

2000-06-30T23:59:59.000Z

91

Characterization of fundamental catalytic properties of MoS2/WS2 nanotubes and nanoclusters for desulfurization catalysis - a surface temperature study  

SciTech Connect (OSTI)

The prior project consisted of two main project lines. First, characterization of novel nanomaterials for hydrodesulfurization (HDS) applications. Second, studying more traditional model systems for HDS such as vapor-deposited silica-supported Mo and MoSx clusters. In the first subproject, we studied WS2 and MoS2 fullerene-like nanoparticles as well as WS2 nanotubes. Thiophene (C4H4S) was used as the probe molecule. Interestingly, metallic and sulfur-like adsorption sites could be identified on the silica-supported fullerene-particles system. Similar structures are seen for the traditional system (vapor-deposited clusters). Thus, this may be a kinetics fingerprint feature of modern HDS model systems. In addition, kinetics data allowed characterization of the different adsorption sites for thiophene on and inside WS2 nanotube bundles. The latter is a unique feature of nanotubes that has not been reported before for any inorganic nanotube system; however, examples are known for carbon nanotubes, including prior work of the PI. Although HDS has been studied for decades, utilizing nanotubes as nanosized HDS reactors has never been tried before, as far as we know. This is of interest from a fundamental perspective. Unfortunately, the HDS activity of the nanocatalysts at ultra-high vacuum (UHV) conditions was close to the detection limit of our techniques. Therefore, we propose to run experiments at ambient pressure on related nanopowder samples as part of the renewal application utilizing a now-available GC (gas chromatograph) setup. In addition, Ni and Co doped nanocatalyts are proposed for study. These dopants will boost the catalytic activity. In the second subproject of the prior grant, we studied HDS-related chemistry on more traditional supported cluster catalysts. Mo clusters supported by physical vapor deposition (PVD) on silica have been characterized. Two reaction pathways are evident when adsorbing thiophene on Mo and MoSx clusters: molecular adsorption and dissociation. PVD Mo clusters turned out to be very reactive toward thiophene bond activation. Sulfur and carbon residuals form, which poison the catalyst and sulfide the Mo clusters. Sulfided silica-supported MoSx samples are not reactive toward thiophene bond activation. In addition to S and C deposits, H2, H2S, and small organic molecules were detected in the gas phase. Catalyst reactivation procedures, including O2 and atomic hydrogen treatments, have been tested. Cluster size effects have been seen: thiophene adsorbs molecularly with larger binding energies on smaller clusters. However, larger clusters have smaller activation energy for C4H4S bond activation than smaller clusters. The latter is consistent with early catalysis studies. Kinetics and dynamics parameters have been determined quantitatively. We spent a significant amount of time on upgrades of our equipment. A 2nd-hand refurbished X-ray photoelectron spectrometer (XPS) has been integrated into the existing molecular beam scattering system and is already operational (supported by the DoE supplemental grant available in October 2009). We also added a time of flight (TOF) system to the beam scattering apparatus and improved on the accessible impact energy range (new nozzle heater and gas mixing manifold) for the beam scattering experiments. In addition, a GC-based powder atmospheric flow reactor for studies on powder samples is now operational. Furthermore, a 2nd UHV kinetics system has been upgraded as well. In summary, mostly single crystal systems have so far been considered in basic science studies about HDS. Industrial catalysts, however, can be better approximated with the supported cluster systems that we studied in this project. Furthermore, an entirely new class of HDS systems, namely fullerene-like particles and inorganic nanotubes, has been included. Studying new materials and systems has the potential to impact science and technology. The systems investigated are closely related to energy and environmental-related surface science/catalysis. This prior project, conducted at NDSU by a sma

U. Burghaus

2012-07-05T23:59:59.000Z

92

Single molecule measurements and molecular motors  

Science Journals Connector (OSTI)

...Hideyuki Okano and Atsushi Iriki Single molecule measurements and molecular motors...Suita, Osaka 565-0871, Japan Single molecule imaging and manipulation are...machines like molecular motors. The single molecule measurements allow a dynamic...

2008-01-01T23:59:59.000Z

93

SINGLE CELL PROTEIN | The Algae  

Science Journals Connector (OSTI)

Abstract Algae, as source of single-cell protein (SCP), is a term that refers to either microscopic single-cell true algae or prokaryotic cyanobacteria, and their growth is based on the use of carbon dioxide and light energy (autotrophic growth). In contrast with other SCP-producing organisms, algae are grown in many cases by processes resembling traditional agriculture, because they depend on large areas and sunlight radiation; on the other hand, modern production techniques include growth inside photobioreactors. Moreover, macroscopic algae are used widely as source of food, but they hardly can fit the SCP definition because of their multicellular nature and low protein content.

M. García-Garibay; L. Gómez-Ruiz; A.E. Cruz-Guerrero; E. Bárzana

2014-01-01T23:59:59.000Z

94

Single particle-induced latchup  

SciTech Connect (OSTI)

This paper presents an up-to-date overview of the single-event latchup (SEL) hard failure mode encountered in electronic device applications involving heavy ion environment. This phenomenon is specific to CMOS technology. Single-event latchup is discussed after a short description of the effects induced by the interaction of a heavy ion with silicon. Understanding these effects is necessary to understand the different failures. This paper includes a description of the latchup phenomenon and the different triggering modes, reviews of models and hardening solutions, and finally presents new developments in simulation approaches.

Bruguier, G.; Palau, J.M. [Univ. Montpellier II (France). Centre d`Electronique de Montpellier] [Univ. Montpellier II (France). Centre d`Electronique de Montpellier

1996-04-01T23:59:59.000Z

95

Single Molecule Analysis Research Tool (SMART): An Integrated Approach for Analyzing Single Molecule Data  

E-Print Network [OSTI]

Single Molecule Analysis Research Tool (SMART): An Integrated Approach for Analyzing Single, Stanford University, Stanford, California, United States of America Abstract Single molecule studies have approach for analyzing these data in the freely available software package SMART: Single Molecule Analysis

Herschlag, Dan

96

Quantitative biology of single neurons  

Science Journals Connector (OSTI)

...micropipette of the soma (b) and dendrites (c). Figure-4. Live single-cell mRNA translation...cell.2008.10.028 ) 117 Sugino, K. , C. M. Hempel, M. N. Miller, A. M. Hattox, P. Shapiro, C. Wu, Z. J. Huang, and S. B. Nelson...

2012-01-01T23:59:59.000Z

97

Germination of Single Bacterial Spores  

Science Journals Connector (OSTI)

...i--: - 1.-- I tI - I -- VOL.98,1969SINGLE-SPORE GERMINATION 11 I- il4 ZIM ............. NPR w dFIG. 3. Time-lapse phase-contrast micrographs of a germinating spore of B. cereus T. Each frame represents the change in...

Tadayo Hashimoto; W. R. Frieben; S. F. Conti

1969-06-01T23:59:59.000Z

98

Single element laser beam shaper  

DOE Patents [OSTI]

A single lens laser beam shaper for converting laser beams from any spatial profile to a flat-top or uniform spatial profile. The laser beam shaper includes a lens having two aspheric surfaces. The beam shaper significantly simplifies the overall structure in comparison with conventional 2-element systems and therefore provides great ease in alignment and reduction of cost.

Zhang, Shukui (Yorktown, VA); Michelle D. Shinn (Newport News, VA)

2005-09-13T23:59:59.000Z

99

Fundamental Study of Single Biomass Particle Combustion  

E-Print Network [OSTI]

Fundamental Study of Single Biomass Particle Combustion Maryam Momeni #12;Fundamental Study of Single Biomass Particle Combustion Maryam Momeni Dissertation submitted to the Faculty of Engineering Fundamental Study of Single Biomass Particle Combustion This thesis is a comprehensive study of single biomass

Berning, Torsten

100

Scaffolding Carbon Nanotubes into Single-Molecule Circuitry  

E-Print Network [OSTI]

Carbon Nanotubes into Single-Molecule Circuitry Brett R.to a single binding site, single molecule precision can beto directly transduce single-molecule interactions such as

Collins, Philip G

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "nanoclusters out-perform single" 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

How Does a Single Pt Nanocatalyst Behave in Two Different Reactions? A Single-Molecule Study  

E-Print Network [OSTI]

How Does a Single Pt Nanocatalyst Behave in Two Different Reactions? A Single-Molecule Study Kyu ABSTRACT: Using single-molecule microscopy of fluoro- genic reactions we studied Pt nanoparticle catalysis. KEYWORDS: Single-particle catalysis, platinum nanoparticles, single-molecule imaging, deacetylation

Chen, Peng

102

Theory of single photon on demand from a single molecule sourcew and Eli Barkaib  

E-Print Network [OSTI]

Theory of single photon on demand from a single molecule sourcew Yong Hea and Eli Barkaib Received for the description of cryogenic temperature single molecules, and that experiments were conducted very close single molecules,7­9 single quantum dots,10­12 or nitrogen vacancy color centers,13 are nowadays

Barkai, Eli

103

Better Randomness with Single Photons  

E-Print Network [OSTI]

Randomness is one of the most important resources in modern information science, since encryption founds upon the trust in random numbers. Since it is impossible to prove if an existing random bit string is truly random, it is relevant that they be generated in a trust worthy process. This requires specialized hardware for random numbers, for example a die or a tossed coin. But when all input parameters are known, their outcome might still be predicted. A quantum mechanical superposition allows for provably true random bit generation. In the past decade many quantum random number generators (QRNGs) were realized. A photonic implementation is described as a photon which impinges on a beam splitter, but such a protocol is rarely realized with non-classical light or anti-bunched single photons. Instead, laser sources or light emitting diodes are used. Here we analyze the difference in generating a true random bit string with a laser and with anti-bunched light. We show that a single photon source provides more r...

Oberreiter, Lukas

2014-01-01T23:59:59.000Z

104

Single-Molecule Stochastic Resonance  

Science Journals Connector (OSTI)

Stochastic resonance (SR) is a well-known phenomenon in dynamical systems. It consists of the amplification and optimization of the response of a system assisted by stochastic (random or probabilistic) noise. Here we carry out the first experimental study of SR in single DNA hairpins which exhibit cooperatively transitions from folded to unfolded configurations under the action of an oscillating mechanical force applied with optical tweezers. By varying the frequency of the force oscillation, we investigate the folding and unfolding kinetics of DNA hairpins in a periodically driven bistable free-energy potential. We measure several SR quantifiers under varied conditions of the experimental setup such as trap stiffness and length of the molecular handles used for single-molecule manipulation. We find that a good quantifier of the SR is the signal-to-noise ratio (SNR) of the spectral density of measured fluctuations in molecular extension of the DNA hairpins. The frequency dependence of the SNR exhibits a peak at a frequency value given by the resonance-matching condition. Finally, we carry out experiments on short hairpins that show how SR might be useful for enhancing the detection of conformational molecular transitions of low SNR.

K. Hayashi; S. de Lorenzo; M. Manosas; J. M. Huguet; F. Ritort

2012-08-24T23:59:59.000Z

105

Photon tunnelling microscopy of polyethylene single crystals  

E-Print Network [OSTI]

Photon tunnelling microscopy of polyethylene single crystals Mohan Srinivasarao* and Richard S:photon tunnellingmicroscopy;single crystals; polyethylene) INTRODUCTION The study of morphology of polymers is an area

Srinivasarao, Mohan

106

Toward single-cycle optical pulses  

E-Print Network [OSTI]

Single-cycle optical pulses, the never-before-achieved regime, have a great potential for attosecond science and phase-sensitive nonlinear optics. To achieve single-cycle optical pulses by active synchronization, three ...

Kim, Jung-Won, 1976-

2004-01-01T23:59:59.000Z

107

Single-Molecule Imaging in Live Cells  

Science Journals Connector (OSTI)

This chapter provides a comprehensive overview of how single-molecule imaging is achieved in live cells. The ... with a particular focus on how they influence single-molecule imaging in live cells. A few fluoresc...

Jie Xiao

2009-01-01T23:59:59.000Z

108

12 - Single-charge transport in graphene  

Science Journals Connector (OSTI)

Abstract: The single-charge tunneling behavior in graphene devices is reviewed and the Coulomb blockade phenomena observed in graphene constrictions, patterned single-electron transistors and graphene nanoribbons are compared with those observed in the conventional single-electron transistors with metallic islands. The phenomena that occur when compressible quantum dots are formed in graphene in the quantum Hall regime, including mesoscopic conductance fluctuations resulting from single-charge tunneling into/out of the quantum dots, are discussed.

D.S. Lee

2014-01-01T23:59:59.000Z

109

Single Organic Microtwist with Tunable Pitch  

Science Journals Connector (OSTI)

Single Organic Microtwist with Tunable Pitch ... Initially, some short twists with lengths of only several pitches are formed. ...

Hai-Bo Chen; Yan Zhou; Jie Yin; Jing Yan; Yuguo Ma; Lei Wang; Yong Cao; Jian Wang; Jian Pei

2009-04-17T23:59:59.000Z

110

Single-molecule Fluorescence Spectroelectrochemistry of Cresyl...  

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

molecule Fluorescence Spectroelectrochemistry of Cresyl Violet. Single-molecule Fluorescence Spectroelectrochemistry of Cresyl Violet. Abstract: We coupled scanning fluorescence...

111

PHOTOCATALYTIC AND PHOTOELECTROCHEMICAL HYDROGEN PRODUCTION ON STRONTIUM TITANATE SINGLE CRYSTALS  

E-Print Network [OSTI]

HYDROGEN PRODUCTION ON STRONTIUM TITANATE SINGLE CRYSTALS F.HYDROGEN PRODUCTION ON STRONTIUM TITANATE SINGLE CRYSTALS

Wagner, F.T.

2012-01-01T23:59:59.000Z

112

Nanoscale Calorimetry of Isolated Polyethylene Single Crystals  

E-Print Network [OSTI]

Nanoscale Calorimetry of Isolated Polyethylene Single Crystals A. T. KWAN, M. YU. EFREMOV, E. A-film differential scanning calorimetry to investigate the melt- ing of isolated polyethylene single crystals of lamellar single crystals of polyethylene (PE). We obtain thickness, diffraction, and calorimetry data

Allen, Leslie H.

113

Single molecule spectroscopy of tetrahedral oligophenylenevinylene molecules  

E-Print Network [OSTI]

Single molecule spectroscopy of tetrahedral oligophenylenevinylene molecules Melissa A. Summers form 17 July 2002 Abstract We probe the fluorescence from single molecules of a new class molecules and compare these signals with the fluorescence from single arm molecules. Our results show

Buratto, Steve

114

Supporting Information to: Single-Molecule Electrocatalysis by Single-Walled Carbon Nanotubes  

E-Print Network [OSTI]

S1 Supporting Information to: Single-Molecule Electrocatalysis by Single-Walled Carbon Nanotubes. Experimental Methods I.1. Purification of SWNTs. The single-walled carbon nanotubes were purchased from Carbon Nanotechnologies Incorporated (Purified HiPCO single-walled carbon nanotubes). These SWNTs have an average diameter

Chen, Peng

115

Multiple events on single molecules: Unbiased estimation in single-molecule biophysics  

E-Print Network [OSTI]

Multiple events on single molecules: Unbiased estimation in single-molecule biophysics Daniel A, Princeton, NJ, December 6, 2005 (received for review June 24, 2005) Most analyses of single-molecule of a motor protein acting on a single molecule must not exceed the total molecule length. We have developed

Dekker, Nynke

116

Fabrication of nanogapped single-electron transistors for transport studies of individual single-molecule magnets  

E-Print Network [OSTI]

Fabrication of nanogapped single-electron transistors for transport studies of individual single-molecule through individual single-molecule magnets SMMs . The devices were patterned via multiple layers molecules have received considerable attention over the last several years due to the introduction of single

del Barco, Enrique

117

Single-Chain Antibody Library  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

Researchers at Pacific Northwest National Laboratory (PNNL) have constructed a nonimmune library consisting of 109 human antibody scFv fragments, which have been cloned and expressed on the surface of yeast. Nanomolar-affinity scFvs are routinely obtained by magnetic bead screening and flow cytometric sorting. The yeast library can be amplified 1010 fold without measurable loss of clonal diversity. This allows for indefinite expansion of the library. All scFv clones can be assessed directly on the yeast cell surface by immunofluorescent labeling and flow cytometry, obviating separate subcloning, expression, and purification steps. The ability to use multiplex library screening demonstrates the utility of this approach for high-throughput antibody isolation for proteomic applications. The yeast library may be used for research projects or teaching performed for U.S. Government purposes only. If you would like to request an aliquot of the single-chain antibody library for your research, please print and fill out the Materials Transfer Agreement (MTA) [PDF, 20K]. The website provides the contact information for mailing the MTA. [copied from http://www.sysbio.org/dataresources/singlechain.stm

Baird, Cheryl

118

Single-Molecule Flourescence/Patch Clamp Microscope | EMSL  

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

Single-Molecule FlourescencePatch Clamp Microscope Single-Molecule FlourescencePatch Clamp Microscope At EMSL, researchers use the single-molecule fluorescencepatch clamp...

119

Monitoring Single Molecule Reactivity On a Carbon Nanotube  

E-Print Network [OSTI]

LETTERS Monitoring Single-Molecule Reactivity on a Carbondevice directly transduces single-molecule attachments andoptical methods in single-molecule research. Compared to

Collins, Philip G

2008-01-01T23:59:59.000Z

120

Single Molecule Spectroscopy for Studying Conformational Dynamics of Short Oligonucleotides  

E-Print Network [OSTI]

to the activity of a single molecule. Over the past twentyallow researchers to use single molecule approaches to forLaser Excitation of Single Molecules. Accounts of Chemical

Lin, Ron Reuven

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "nanoclusters out-perform single" 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

Scaffolding Carbon Nanotubes into Single-Molecule Circuitry  

E-Print Network [OSTI]

Three-terminal, single molecule circuits based on carbonHowever, reliable single- molecule devices remainnew architecture for studying single- molecule behavior that

Collins, Philip G

2007-01-01T23:59:59.000Z

122

Single molecule studies of DNA packaging by bacteriophages  

E-Print Network [OSTI]

for the study of single molecule protein- DNA interactions.Physics Studies in Single Molecule Biophysics ProfessorOF THE DISSERTATION Single Molecule Studies of DNA Packaging

Fuller, Derek Nathan

2008-01-01T23:59:59.000Z

123

Methods for parallel amplification of single DNA molecules  

E-Print Network [OSTI]

2006) BEAMing: single? molecule PCR on microparticles in Mutation  detection and single?molecule counting using Amplification of DNA Single Molecules by Linear Rolling 

McElfish, Erin Marie

2009-01-01T23:59:59.000Z

124

Intermittent Single-Molecule Interfacial Electron Transfer Dynamics...  

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

Intermittent Single-Molecule Interfacial Electron Transfer Dynamics. Intermittent Single-Molecule Interfacial Electron Transfer Dynamics. Abstract: We report on single molecule...

125

Heralded single-photon partial coherence  

Science Journals Connector (OSTI)

We study transverse spatial coherence of approximately localized single-photon states. We demonstrate nonlocal control over single-photon spatial coherence via projective measurements of an entangled twin and provide a theoretical interpretation from quantum coherence theory. Our results show that the spatial coherence of a single-photon state behaves similarly to that of a classical optical field, although the coincidence measurement adds a degree of freedom.

P. Ben Dixon; Gregory Howland; Mehul Malik; David J. Starling; R. W. Boyd; John C. Howell

2010-08-02T23:59:59.000Z

126

Heralded single-photon partial coherence  

SciTech Connect (OSTI)

We study transverse spatial coherence of approximately localized single-photon states. We demonstrate nonlocal control over single-photon spatial coherence via projective measurements of an entangled twin and provide a theoretical interpretation from quantum coherence theory. Our results show that the spatial coherence of a single-photon state behaves similarly to that of a classical optical field, although the coincidence measurement adds a degree of freedom.

Dixon, P. Ben; Howland, Gregory; Starling, David J.; Howell, John C. [Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627 (United States); Malik, Mehul [Institute of Optics, University of Rochester, Rochester, New York 14627 (United States); Boyd, R. W. [Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627 (United States); Institute of Optics, University of Rochester, Rochester, New York 14627 (United States)

2010-08-15T23:59:59.000Z

127

Optical Precursor of a Single Photon  

SciTech Connect (OSTI)

We report the direct observation of optical precursors of heralded single photons with step- and square-modulated wave packets passing through cold atoms. Using electromagnetically induced transparency and the slow-light effect, we separate the single-photon precursor, which always travels at the speed of light in vacuum, from its delayed main wave packet. In the two-level superluminal medium, our result suggests that the causality holds for a single photon.

Zhang Shanchao; Chen, J. F.; Liu, Chang; Loy, M. M. T.; Wong, G. K. L.; Du, Shengwang [Department of Physics, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon (Hong Kong)

2011-06-17T23:59:59.000Z

128

Epitaxial Single Crystal Nanostructures for Batteries & PVs ...  

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

Electrode Channel Flow DEMS Cell Sulfur@Carbon Cathodes for Lithium Sulfur Batteries Better Ham & Cheese: Enhanced Anodes and Cathodes for Fuel Cells Epitaxial Single...

129

Electron transport through single carbon nanotubes  

E-Print Network [OSTI]

through single carbon nanotubes G. Chai Apollo Technologies,aligned multi-wall carbon nanotubes (CNT). Embedding of CNTsuse of fiber coated carbon nanotubes makes the handling of

Chai, G

2008-01-01T23:59:59.000Z

130

High Throughput Single Molecule Investigation of Transcription  

E-Print Network [OSTI]

Single Molecule Protein Folding in a Coaxial Mixer. Biophys.Kinetic Studies of Protein Folding. Anal. Chem. 76, 7169-Molecule Measurement of Protein Folding Kinetics . Science

Kim, Soohong

2012-01-01T23:59:59.000Z

131

Electron transport through single carbon nanotubes  

E-Print Network [OSTI]

transport through single carbon nanotubes G. Chai Apolloaligned multi-wall carbon nanotubes (CNT). Embedding of CNTsuse of fiber coated carbon nanotubes makes the handling of

Chai, G

2008-01-01T23:59:59.000Z

132

Magnetism of Single Vacancies in Rippled Graphene  

Science Journals Connector (OSTI)

Magnetism of Single Vacancies in Rippled Graphene ... Our results suggest that any magnetism induced by vacancies that occurs in graphene can be controlled by applying strain. ...

E. J. G. Santos; S. Riikonen; D. Sánchez-Portal; A. Ayuela

2012-03-02T23:59:59.000Z

133

Nanometer Resolution Imaging by SIngle Molecule Switching  

SciTech Connect (OSTI)

The fluorescence intensity of single molecules can change dramatically even under constant laser excitation. The phenomenon is frequently called "blinking" and involves molecules switching between high and low intensity states.[1-3] In additional to spontaneous blinking, the fluorescence of some special fluorophores, such as cyanine dyes and photoactivatable fluorescent proteins, can be switched on and off by choice using a second laser. Recent single-molecule spectroscopy investigations have shed light on mechanisms of single molecule blinking and photoswitching. This ability to controllably switch single molecules led to the invention of a novel fluorescence microscopy with nanometer spatial resolution well beyond the diffraction limit.

Hu, Dehong; Orr, Galya

2010-04-02T23:59:59.000Z

134

Single-Molecule Fluorescence Analysis in Solution  

Science Journals Connector (OSTI)

Over the past five years, several groups have developed the capability to detect and identify single fluorescent molecules in solution as the molecules flow through a focused laser...

Keller, Richard A; Ambrose, W Patrick; Goodwin, Peter M; Jett, James H; Martin, John C; Wu, Ming

1996-01-01T23:59:59.000Z

135

Physics & Astronomy BSc (Single Honours Degrees)  

E-Print Network [OSTI]

138 Physics & Astronomy BSc (Single Honours Degrees) Astrophysics Physics MPhys (Single Honours in the new concourse of the School's main building. Physics&Astronomy Features * The size of the School and Astronomy degrees have been accredited by the Institute of Physics. * The University Observatory contains

Brierley, Andrew

136

Single Assessment Pass Rate South Carolina  

E-Print Network [OSTI]

Single Assessment Pass Rate South Carolina Academic Year 2004 - 2005 ETS Type of Assessment Test in Cohort 2,218 in Cohort #12;Single Assessment Pass Rate South Carolina Academic Year 2004 - 2005 ETS Type, Part 0063 Middle School Mathematics 0069 Chemistry, Physics and General Science 0070 Social Studies

Kasman, Alex

137

Mobile Robot Geometry Initialization from Single Camera  

E-Print Network [OSTI]

Mobile Robot Geometry Initialization from Single Camera Daniel Pizarro1 , Manuel Mazo1 , Enrique to achieve robot localization has been widely proposed in the area of Intelligent Spaces. Recently, an online approach that simul- taneously obtains robot's pose and its 3D structure using a single external camera has

Paris-Sud XI, Université de

138

Ames Lab 101: Single Crystal Growth  

SciTech Connect (OSTI)

Ames Laboratory scientist Deborah Schlagel talks about the Lab's research in growing single crystals of various metals and alloys. The single crystal samples are vital to researchers' understanding of the characteristics of a materials and what gives these materials their particular properties.

Schlagel, Deborah

2013-09-27T23:59:59.000Z

139

Diamond based single molecule magnetic resonance spectroscopy  

E-Print Network [OSTI]

The detection of a nuclear spin in an individual molecule represents a key challenge in physics and biology whose solution has been pursued for many years. The small magnetic moment of a single nucleus and the unavoidable environmental noise present the key obstacles for its realization. Here, we demonstrate theoretically that a single nitrogen-vacancy (NV) center in diamond can be used to construct a nano-scale single molecule spectrometer that is capable of detecting the position and spin state of a single nucleus and can determine the distance and alignment of a nuclear or electron spin pair. The proposed device will find applications in single molecule spectroscopy in chemistry and biology, such as in determining protein structure or monitoring macromolecular motions and can thus provide a tool to help unravelling the microscopic mechanisms underlying bio-molecular function.

Jianming Cai; Fedor Jelezko; Martin B. Plenio; Alex Retzker

2011-12-23T23:59:59.000Z

140

Probing Single-Molecule Protein Conformational Dynamics. | EMSL  

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

Single-Molecule Protein Conformational Dynamics. Probing Single-Molecule Protein Conformational Dynamics. Abstract: Protein conformational fluctuations and dynamics, often...

Note: This page contains sample records for the topic "nanoclusters out-perform single" 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

Clay Nanoparticle-Supported Single-Molecule FluorescenceSpectroelectr...  

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

Clay Nanoparticle-Supported Single-Molecule Fluorescence Spectroelectrochemistry. Clay Nanoparticle-Supported Single-Molecule Fluorescence Spectroelectrochemistry. Abstract: We...

142

Radial-Radial Single Rotor Turbine  

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

Radial-Radial Single Rotor Turbine Radial-Radial Single Rotor Turbine Radial-Radial Single Rotor Turbine A rotor for use in turbine applications. Available for thumbnail of Feynman Center (505) 665-9090 Email Radial-Radial Single Rotor Turbine A rotor for use in turbine applications has a radial compressor/pump having radially disposed spaced apart fins forming passages and a radial turbine having hollow turbine blades interleaved with the fins and through which fluid from the radial compressor/pump flows. The rotor can, in some applications, be used to produce electrical power. U.S. Patent No.: 7,044,718 (DOE S-100,626) Patent Application Filing Date: July 8, 2003 Patent Issue Date: May 16, 2006 Licensing Status: Available for Express Licensing (?). View terms and a sample license agreement.

143

Hanford Single-Shell Tank Integrity Program  

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

Operations Contract Hanford Single Hanford Single- -Shell Shell Hanford Single Hanford Single Shell Shell Tank Integrity Tank Integrity Program Program Herbert S Berman Herbert S Berman Herbert S. Berman Herbert S. Berman July 29, 2009 July 29, 2009 1 Page 1 Tank Operations Contract Introduction * The Hanford site's principle historic mission was plutonium production for the manufacture of nuclear weapons. * Between 1944 and 1988, the site operated nine graphite- moderated light-water production reactors to irradiate moderated, light-water, production reactors to irradiate fuel and produce plutonium. * Four large chemical separations plants were run to extract plutonium from the fuel, and a variety of laboratories, support facilities, and related infrastructure to support production

144

Press Pass - Press Release - Single top quark  

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

9-04 9-04 March 9, 2009 For immediate release Media Contacts: Judy Jackson, Fermilab, +1-630-840-3351, jjackson@fnal.gov Kurt Riesselmann, Fermilab, +1-630-840-3351, kurtr@fnal.gov Graphics and photos are available at: http://www.fnal.gov/pub/presspass/images/Single-Top-Quark-2009.html Fermilab collider experiments discover rare single top quark Batavia, Ill.-Scientists of the CDF and DZero collaborations at the Department of Energy's Fermi National Accelerator Laboratory have observed particle collisions that produce single top quarks. The discovery of the single top confirms important parameters of particle physics, including the total number of quarks, and has significance for the ongoing search for the Higgs particle at Fermilab's Tevatron, currently the world's most powerful operating particle accelerator.

145

Symmetry of single-wall nanotubes  

Science Journals Connector (OSTI)

A review of the symmetry groups of the various single-wall nano- and microtubes considered in the literature (BN, GaN, MS2, C, BC3, BC2N) is presented.

Damnjanovic, M.

2001-04-27T23:59:59.000Z

146

Spin effects in single-electron transistors  

E-Print Network [OSTI]

Basic electron transport phenomena observed in single-electron transistors (SETs) are introduced, such as Coulomb-blockade diamonds, inelastic cotunneling thresholds, the spin-1/2 Kondo effect, and Fano interference. With ...

Granger, Ghislain

2005-01-01T23:59:59.000Z

147

Single Stream Recycling Say Goodbye to Sorting  

E-Print Network [OSTI]

Single Stream Recycling Say Goodbye to Sorting Paper Please email recycle@umich.edu for more Containers Cardboard Please flatten all cardboard before placing into bin! Visit us at www.recycle

Awtar, Shorya

148

Peoples Gas – Single Family Direct Install (Illinois)  

Broader source: Energy.gov [DOE]

Owners of single-family homes, condos, townhomes and two-flats may be eligible for a free installation of new programmable thermostats, pipe insulation, showerheads, and faucet aerators through...

149

Phenomenology of single and double diffraction dissociation  

E-Print Network [OSTI]

Predictions of the gap-probability renormalization model for single and double diffraction dissociation cross sections in proton-proton collisions at the LHC are presented and compared with recent CMS measurements.

Konstantin Goulianos

2013-10-21T23:59:59.000Z

150

Magnetically multiplexed heating of single domain nanoparticles  

E-Print Network [OSTI]

Selective hysteretic heating of multiple collocated types of single domain magnetic nanoparticles (SDMNPs) by alternating magnetic fields (AMFs) may offer a useful tool for biomedical applications. The possibility of ...

Romero, G.

151

Laser Ignition of Single Magnesium Particles  

Science Journals Connector (OSTI)

The minimum ignition temperature and minimum ignition energy of single magnesium particles was determined ... levitated ultrasonically and was ignited by a short laser pulse. The temperature transient of the part...

J. F. Zevenbergen; A. E. Dahoe…

2000-01-01T23:59:59.000Z

152

Single-molecule kinetics of nanoparticle catalysis  

Science Journals Connector (OSTI)

Owing to their structural dispersion, the catalytic properties of nanoparticles are challenging to characterize in ensemble-averaged measurements. The single-molecule approach enables studying the catalysis of na...

Weilin Xu; Hao Shen; Guokun Liu; Peng Chen

2009-12-01T23:59:59.000Z

153

Single Molecule Probes of Lipid Membrane Structure  

E-Print Network [OSTI]

structural metrics with function in biological membranes. Single-molecule fluorescence studies were used to measure membrane structure at the molecular level. Several groups have shown that polarized total internal reflection fluorescence microscopy (PTIRF...

Livanec, Philip W.

2009-12-14T23:59:59.000Z

154

Single-Molecule Detection with Active Transport.  

E-Print Network [OSTI]

??A glass capillary is used near the focal region of a custom-built confocal microscope to investigate the use of active transport for single-molecule detection in… (more)

Ball, David Allan

2006-01-01T23:59:59.000Z

155

A single power supply optoelectronic differential amplifier  

E-Print Network [OSTI]

A SINGLE POWER SUPPLY OPTOELECTRONIC DIFFERENTIAL AMPLIFIER A Thesis by YOUNGiXIIN ALBERT CHOI Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE December... 1987 Major Subject: Electrical Engineering A SINGLE POWER SUPPLY OPTOELECTRONIC DIFFERENTIAL AMPLIFIER A Thesis by YOUNGMIN ALBERT CHOI Approved a. s to style and content by: He y F. aylor (Chairman of Committee) Kai Chang (Member) Ohannes...

Choi, Youngmin Albert

1987-01-01T23:59:59.000Z

156

Indistinguishable Photons from a Single Molecule  

E-Print Network [OSTI]

We report the results of coincidence counting experiments at the output of a Michelson interferometer using the zero-phonon-line emission of a single molecule at $1.4 K$. Under continuous wave excitation, we observe the absence of coincidence counts as an indication of two-photon interference. This corresponds to the observation of Hong-Ou-Mandel correlations and proves the suitability of the zero-phonon-line emission of single molecules for applications in linear optics quantum computation.

A. Kiraz; M. Ehrl; Th. Hellerer; O. E. Mustecaplioglu; C. Brauchle; A. Zumbusch

2005-05-05T23:59:59.000Z

157

Single Molecule Detection of Nanomechanical Motion  

Science Journals Connector (OSTI)

We investigate theoretically how single molecule spectroscopy techniques can be used to perform fast and high resolution displacement detection and manipulation of nanomechanical oscillators, such as singly clamped carbon nanotubes. We analyze the possibility of real time displacement detection by the luminescence signal and of displacement fluctuations by the degree of second order coherence. Estimates of the electromechanical coupling constant indicate that intriguing regimes of strong backaction between the two-level system of a molecule and the oscillator can be realized.

Vadim Puller; Brahim Lounis; Fabio Pistolesi

2013-03-19T23:59:59.000Z

158

Glauber coherence of single-electron sources  

Science Journals Connector (OSTI)

Recently demonstrated solid-state single-electron sources generate different quantum states depending on their operation condition. For adiabatic and nonadiabatic sources, we determine the Glauber correlation function in terms of the Floquet scattering matrix of the source. The correlation function provides full information on the shape of the state and on its time-dependent amplitude and phase. The coherence properties of single-electron states are therefore essential for the production of quantum multiparticle states.

G. Haack; M. Moskalets; M. Büttiker

2013-05-17T23:59:59.000Z

159

Bionanotechnology for single-cell analysis  

Science Journals Connector (OSTI)

The cell is the smallest structural unit of biological life. These microscopic systems perform functions as diverse as energy metabolism, intra- and intercellular signalling by chemical and electrical means, and self-reproduction. Thousands of different biochemical and electrical processes are simultaneously performed with the aid of nanometre-sized proteins and information stored in DNA. Multiple processes interconnect, giving rise to complicated biological phenomena. Therefore measurement of biomolecules in intact live cells provides more relevant knowledge of their physiological function than biochemical assays carried out with purified molecules in test tubes. Several measurement techniques for single-cell analysis, developed in the past decades, have the sensitivity and resolution to monitor a small number of biomolecules within a single cell. For example, with patch clamp and related techniques, one can measure electric current passing through an ion channel to study the behaviour of a single protein molecule. Electrochemical methods such as amperometry and voltammetry allow measurement of about one hundred zepto moles of oxidisable chemicals secreted from a single cell. Various fluorescence techniques reveal the dynamics of intracellular signals such as free Ca2+ in a single cell. Newer application of nanotechnological measurements with high spatio-temporal resolution on single-cell analysis is certainly a promising area of both bionanotechnology and cell biology. In this review we will introduce several experimental approaches that have contributed to our understanding of cell functions.

Duk-Su Koh; Dae Won Moon

2006-01-01T23:59:59.000Z

160

Fast recognition of single molecules based on single-event photon statistics  

SciTech Connect (OSTI)

Mandel's Q parameter, which is determined from single-event photon statistics, provides an alternative way to recognize single molecules with fluorescence detection, other than the second-order correlation function. It is shown that the Q parameter of an assumed ideal double-molecule fluorescence with the same average photon number as that of the sample fluorescence can act as the criterion for single-molecule recognition. The influence of signal-to-background ratio and the error estimates for photon statistics are also presented. We have applied this method to ascertain single Cy5 dye molecules within hundreds of milliseconds.

Dong Shuangli; Huang Tao; Liu Yuan; Wang Jun; Zhang Guofeng; Xiao Liantuan; Jia Suotang [State Key Laboratory of Quantum Optics and Quantum Optics Devices, College of Physics and Electronics Engineering, Shanxi University, Taiyuan, 030006 (China)

2007-12-15T23:59:59.000Z

Note: This page contains sample records for the topic "nanoclusters out-perform single" 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

Pseudo-Single-Bunch Expands Experimental Scope  

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

Pseudo-Single-Bunch Expands Experimental Scope Print Pseudo-Single-Bunch Expands Experimental Scope Print Initial tests of a new pseudo-single-bunch (PSB) operational mode at the ALS have shown promising results-PSB would vastly expand the facility's capacity to carry out dynamics and time-of-flight experiments with a major reduction in sample damage. In PSB operation, a single electron bunch is displaced transversely from the other electron bunches circulating in the storage ring. Experiments that require light emitted only from a single bunch can stop the light emitted from the other bunches using a collimator. Other beamlines would only see a small reduction in flux due to the displaced bunch. As a result, PSB complements the scheduling of multibunch and timing experiments-currently, the ALS only offers these capabilities for four weeks out of its yearly operating schedule. With PSB operation, the ability to conduct time-of-flight experiments could be available year-round.

162

Pseudo-Single-Bunch Expands Experimental Scope  

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

Pseudo-Single-Bunch Expands Experimental Scope Print Pseudo-Single-Bunch Expands Experimental Scope Print Initial tests of a new pseudo-single-bunch (PSB) operational mode at the ALS have shown promising results-PSB would vastly expand the facility's capacity to carry out dynamics and time-of-flight experiments with a major reduction in sample damage. In PSB operation, a single electron bunch is displaced transversely from the other electron bunches circulating in the storage ring. Experiments that require light emitted only from a single bunch can stop the light emitted from the other bunches using a collimator. Other beamlines would only see a small reduction in flux due to the displaced bunch. As a result, PSB complements the scheduling of multibunch and timing experiments-currently, the ALS only offers these capabilities for four weeks out of its yearly operating schedule. With PSB operation, the ability to conduct time-of-flight experiments could be available year-round.

163

Pseudo-Single-Bunch Expands Experimental Scope  

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

Pseudo-Single-Bunch Expands Experimental Scope Print Pseudo-Single-Bunch Expands Experimental Scope Print Initial tests of a new pseudo-single-bunch (PSB) operational mode at the ALS have shown promising results-PSB would vastly expand the facility's capacity to carry out dynamics and time-of-flight experiments with a major reduction in sample damage. In PSB operation, a single electron bunch is displaced transversely from the other electron bunches circulating in the storage ring. Experiments that require light emitted only from a single bunch can stop the light emitted from the other bunches using a collimator. Other beamlines would only see a small reduction in flux due to the displaced bunch. As a result, PSB complements the scheduling of multibunch and timing experiments-currently, the ALS only offers these capabilities for four weeks out of its yearly operating schedule. With PSB operation, the ability to conduct time-of-flight experiments could be available year-round.

164

Nonlinear interaction between two heralded single photons  

E-Print Network [OSTI]

Harnessing nonlinearities strong enough to allow two single photons to interact with one another is not only a fascinating challenge but is central to numerous advanced applications in quantum information science. Currently, all known approaches are extremely challenging although a few have led to experimental realisations with attenuated classical laser light. This has included cross-phase modulation with weak classical light in atomic ensembles and optical fibres, converting incident laser light into a non-classical stream of photon or Rydberg blockades as well as all-optical switches with attenuated classical light in various atomic systems. Here we report the observation of a nonlinear parametric interaction between two true single photons. Single photons are initially generated by heralding one photon from each of two independent spontaneous parametric downconversion sources. The two heralded single photons are subsequently combined in a nonlinear waveguide where they are converted into a single photon with a higher energy. Our approach highlights the potential for quantum nonlinear optics with integrated devices, and as the photons are at telecom wavelengths, it is well adapted to applications in quantum communication.

T. Guerreiro; A. Martin; B. Sanguinetti; J. S. Pelc; C. Langrock; M. M. Fejer; N. Gisin; H. Zbinden; N. Sangouard; R. T. Thew

2014-03-09T23:59:59.000Z

165

Tools for Single-Molecule Sequence Detection and Manipulation  

E-Print Network [OSTI]

J. & Smith, D. E. Single-molecule studies of DNA mechanics.polymer physics at the single-molecule level. Phil. Trans.Block, S. High-Resolution, Single-Molecule Measurements of

Zohar, Hagar

2011-01-01T23:59:59.000Z

166

Scaffolding Carbon Nanotubes into Single-Molecule Circuitry  

E-Print Network [OSTI]

carbon nanotubes as single-molecule biosensors. Nano Lett.1990). S.N. Xie: Single-molecule approach to enzymology.improvements to the single molecule oxidation of carbon

Collins, Philip G

2008-01-01T23:59:59.000Z

167

Single Molecule and Synthetic Biology Studies of Transcription  

E-Print Network [OSTI]

R.J. et al. Single-molecule study of transcriptional pausingBustamante, C. Single molecule transcription elongation.RNA polymerase. A single-molecule view of the transcription

Zamft, Bradley Michael

2011-01-01T23:59:59.000Z

168

Single-molecule reactions and spectroscopy via vibrational excitation  

Science Journals Connector (OSTI)

...J. Kelly and R. E. Palmer Single-molecule reactions and spectroscopy via...Inelastic Tunnelling|Vibration|Single Molecule|Scanning Tunnelling Microscopy (Stm)| Single-molecule reactions and spectroscopy via...

2004-01-01T23:59:59.000Z

169

Single-molecule studies of DNA dynamics and intermolecular forces  

E-Print Network [OSTI]

forces imposed on a single molecule in a concentratedOF THE DISSERTATION Single-Molecule Studies of DNA DynamicsRecently developed single-molecule techniques, which allow

Robertson, Rae Marie

2007-01-01T23:59:59.000Z

170

Single-Molecule Lysozyme Dynamics Monitored by an Electronic Circuit  

E-Print Network [OSTI]

Chem. B 38. S. N. Xie, Single Molecules 2, 229 (2001). 39.Technol. 26, 1338 (2010). Single-Molecule Lysozyme Dynamicsprobe the dynamics of single molecules (1) and overcome the

Collins, Philip G

2012-01-01T23:59:59.000Z

171

Biology and polymer physics at the single–molecule level  

Science Journals Connector (OSTI)

...Olmsted Biology and polymer physics at the single-molecule level Steven Chu Department of Physics...be hidden from view can be clearly seen in single-molecule experiments. single-molecule biology|polymer dynamics|biological physics...

2003-01-01T23:59:59.000Z

172

Optimal Statistical Methods for Analysis of Single-Molecule Data  

E-Print Network [OSTI]

5 Application to Single Molecule Trajectories 5.1 Maximum13 Methods and Materials 13.1 A server-based single-moleculeto-End Distance on Single-Molecule Experi- ment Time Scales

Watkins, Lucas

2009-01-01T23:59:59.000Z

173

Chiral tunneling in single and bilayer graphene  

E-Print Network [OSTI]

We review chiral (Klein) tunneling in single-layer and bilayer graphene and present its semiclassical theory, including the Berry phase and the Maslov index. Peculiarities of the chiral tunneling are naturally explained in terms of classical phase space. In a one-dimensional geometry we reduced the original Dirac equation, describing the dynamics of charge carriers in the single layer graphene, to an effective Schr\\"odinger equation with a complex potential. This allowed us to study tunneling in details and obtain analytic formulas. Our predictions are compared with numerical results. We have also demonstrated that, for the case of asymmetric n-p-n junction in single layer graphene, there is total transmission for normal incidence only, side resonances are suppressed.

T. Tudorovskiy; K. J. A. Reijnders; M. I. Katsnelson

2011-06-15T23:59:59.000Z

174

What are single photons good for?  

E-Print Network [OSTI]

In a long-held preconception, photons play a central role in present-day quantum technologies. But what are sources producing photons one by one good for precisely? Well, in opposition to what many suggest, we show that single-photon sources are not helpful for point to point quantum key distribution because faint laser pulses do the job comfortably. However, there is no doubt about the usefulness of sources producing single photons for future quantum technologies. In particular, we show how single-photon sources could become the seed of a revolution in the framework of quantum communication, making the security of quantum key distribution device independent or extending quantum communication over many hundreds of kilometers. Hopefully, these promising applications will provide a guideline for researchers to develop more and more efficient sources, producing narrowband, pure and indistinguishable photons at appropriate wavelengths.

Nicolas Sangouard; Hugo Zbinden

2012-02-02T23:59:59.000Z

175

Single molecule studies of DNA mismatch repair  

Science Journals Connector (OSTI)

Abstract DNA mismatch repair, which involves is a widely conserved set of proteins, is essential to limit genetic drift in all organisms. The same system of proteins plays key roles in many cancer related cellular transactions in humans. Although the basic process has been reconstituted in vitro using purified components, many fundamental aspects of DNA mismatch repair remain hidden due in part to the complexity and transient nature of the interactions between the mismatch repair proteins and DNA substrates. Single molecule methods offer the capability to uncover these transient but complex interactions and allow novel insights into mechanisms that underlie DNA mismatch repair. In this review, we discuss applications of single molecule methodology including electron microscopy, atomic force microscopy, particle tracking, FRET, and optical trapping to studies of DNA mismatch repair. These studies have led to formulation of mechanistic models of how proteins identify single base mismatches in the vast background of matched DNA and signal for their repair.

Dorothy A. Erie; Keith R. Weninger

2014-01-01T23:59:59.000Z

176

Development of single crystal filaments. Final report  

SciTech Connect (OSTI)

The program just completed addresses a route to a more efficient longer-lasting electric light bulb filament. All current filaments for light bulbs are metallic in nature. They are subject to embrittlement with age (large grain growth) and relatively high vapor pressures which limits their operating temperature. There is evidence which suggests advantages to using high temperature refractory single crystal fibers as a filament for a light bulb. These refractory materials may include materials such as hafnium or tantalum carbide which have melting points about 500{degrees}C higher than tungsten. Another advantage is that single crystal fibers have a very high degree of crystalline perfection with very few voids and dislocations. Without these imperfections, the atomic mobility at high temperatures is highly restricted. Thus single crystal fibers are very stable at high temperature and will last longer. The efficiencies result from running these single crystal ceramic fiber filaments at higher temperatures and the higher emissivity of the carbide filaments compared to tungsten. The amount of visible light is proportional to the 4the power of the temperature thus a 500{degrees}C higher operating give about a 3-fold increase in radiation in the visible range. The program accomplishments can be summarized as follows: (1) Single crystal fibers of JfC sufficient crystal quality for light bulb filament applications were made. (2) The HfC fiber furnace growth chamber, power control and data collection system was developed for the laboratory scale plant. (3) method for mounting and apparatuses for testing the single crystal fiber filaments were developed and built.

Milewski, J.V.; Shoultz, R.A.; Bourque-McConnell, M.M.

1995-04-01T23:59:59.000Z

177

Coherent Perfect Absorption of Single Photons  

E-Print Network [OSTI]

We examine the question of coherent perfect absorption (CPA) of single photons, and more generally, of the quantum fields. We show the CPA of path entangled single photons in a Fabry-Perot interferometer containing an absorptive medium. The frequency of perfect absorption can be controlled by changing the interferometer parameters like the reflectivity and the complex dielectric constant of the material. We exhibit similar results for path entangled photons in micro-ring resonators. For entangled fields like the ones produced by a down converter the CPA aspect is evident in phase sensitive detection schemes such as in measurements of the squeezing spectrum.

Huang, Sumei

2014-01-01T23:59:59.000Z

178

Hydrogenation of single-walled carbon nanotubes  

E-Print Network [OSTI]

Towards the development of a useful mechanism for hydrogen storage, we have studied the hydrogenation of single-walled carbon nanotubes with atomic hydrogen using core-level photoelectron spectroscopy and x-ray absorption spectroscopy. We find that atomic hydrogen creates C-H bonds with the carbon atoms in the nanotube walls and such C-H bonds can be com-pletely broken by heating to 600 oC. We demonstrate approximately 65+/-15 at % hydrogenation of carbon atoms in the single-walled carbon nanotubes which is equivalent to 5.1+/-1.2 weight % hydrogen capacity. We also show that the hydrogenation is a reversible process.

Anton Nikitin; Hirohito Ogasawara; David Mann; Reinhard Denecke; Zhiyong Zhang; Hongjie Dai; KJ Cho; Anders Nilsson

2005-10-14T23:59:59.000Z

179

Electronic conduction through single crystals of polyethylene  

E-Print Network [OSTI]

May, 1966 Major Subjects Physics ELECTRONIC CONDUCTION THROUGH SINGLE CRYSTRLS OF POLYETHYLENE k Thesis By Gerald Maurice Samson Approved as to style and content by: naen of the Committee ad of the D artment ber ber c- The autho. u... talc o Polyot! ylone . -y, i'oo Gerald !':cur"' co Samson Directed by: Zr. Joe S. The predominant conduction mechani m through single cryo' mls op polyethylene is shown to be Schott!cy ( hernal) oui "sion . or tompora- o tu. es - bove 0 C. . "or...

Samson, Gerald Maurice

1966-01-01T23:59:59.000Z

180

Ghost imaging with a single detector  

SciTech Connect (OSTI)

We experimentally demonstrate pseudothermal ghost imaging and ghost diffraction using only a single detector. We achieve this by replacing the high-resolution detector of the reference beam with a computation of the propagating field, following a recent proposal by Shapiro [Phys. Rev. A 78, 061802(R) (2008)]. Since only a single detector is used, this provides experimental evidence that pseudothermal ghost imaging does not rely on nonlocal quantum correlations. In addition, we show the depth-resolving capability of this ghost imaging technique.

Bromberg, Yaron; Katz, Ori; Silberberg, Yaron [Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot 76100 (Israel)

2009-05-15T23:59:59.000Z

Note: This page contains sample records for the topic "nanoclusters out-perform single" 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

A single ion inside a miniature cavity  

E-Print Network [OSTI]

understanding of nature. For instance, Joseph von Fraunhofer’s observation of absorption-lines in the optical spectrum of the Sun was crucial for the development of Rydberg’s formula and Bohr’s atomic model. However, under normal conditions the light... the prescribed word limit of 60’000 words. Abstract A Single Ion Inside a Miniature Cavity This thesis describes the first experimentally achieved coupling of a single atomic ion to an optical fibre-cavity as well as the first photonic interaction between a...

Steiner, Matthias

2014-04-08T23:59:59.000Z

182

Life at the Single Molecule Level  

SciTech Connect (OSTI)

In a living cell, gene expression—the transcription of DNA to messenger RNA followed by translation to protein—occurs stochastically, as a consequence of the low copy number of DNA and mRNA molecules involved. Can one monitor these processes in a living cell in real time? How do cells with identical genes exhibit different phenotypes? Recent advances in single-molecule imaging in living bacterial cells allow these questions to be answered at the molecular level in a quantitative manner. It was found that rare events of single molecules can have important biological consequences.

Xie, Xiaoliang Sunny (Harvard) [Harvard

2011-03-04T23:59:59.000Z

183

Reduction of single-photon emission from a single-emitter system by intersystem crossing  

Science Journals Connector (OSTI)

We investigate the reduction in the probability of single-photon emission from a single-emitter system caused by intersystem crossing. The physical model is that a single-emitter system with three levels is excited by a square pulse laser, and then a single photon is emitted at a controllable time. We find that the intersystem crossing always reduces the probability of single-photon emission. We obtain quantitative and analytical expressions for the probabilities of zero-, one-, and two-photon emission and Mandel's Q parameter as the function of the intersystem crossing rate under the conditions of finite field strength and finite interaction time with the laser pulse. We discuss the conditions for obtaining the maximal probability of single-photon emission in the presence of intersystem crossing. We find that one can obtain a high probability of single-photon emission from the single-emitter system using square pulse excitation in comparison with continuous wave excitation. Mandel's Q parameter exhibits a transition from a sub-Poissonian behavior to a super-Poissonian behavior due to the influence of intersystem crossing. The calculated Mandel's Q parameter and second-order correlation function of photon emission considering the coherent effect are in better agreement with the experimental data.

Yong He and Lin Dai

2014-01-28T23:59:59.000Z

184

Standard Work Specifications for Single-Family Home Energy Upgrades...  

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

for Single-Family Home Energy Upgrades to define the minimum requirements for high- quality residential energy upgrades. The Standard Work Specifications for Single-Family...

185

Single Supported Atoms Participate in Catalytic Processes | ornl...  

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

Functional Materials for Energy Single Supported Atoms Participate in Catalytic Processes December 04, 2014 Pathways for NO oxidation on single Pt atoms supported on the (010)...

186

Transient Dynamometer Testing of a Single Leg NOx Adsorber Combined...  

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

Transient Dynamometer Testing of a Single Leg NOx Adsorber Combined with a Fuel Processor for Enhanced NOx Control Transient Dynamometer Testing of a Single Leg NOx Adsorber...

187

Payer source for single, elderly women in nursing homes.  

E-Print Network [OSTI]

?? This study seeks to determine the payer source for single, elderly women in nursing homes. By determining the payer source for single, elderly women,… (more)

Nakagawa, Sage

2013-01-01T23:59:59.000Z

188

Single-step conversion of cellulose to 5-hydroxymethylfurfural...  

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

Single-step conversion of cellulose to 5-hydroxymethylfurfural (HMF), a versatileplatform chemical. Single-step conversion of cellulose to 5-hydroxymethylfurfural (HMF), a...

189

Single-molecule imaging studies of protein dynamics.  

E-Print Network [OSTI]

??Single-molecule fluorescence imaging is a powerful method for studying biological events. The work of this thesis primarily focuses on single molecule studies of the dynamics… (more)

Zareh, Shannon Kian

2011-01-01T23:59:59.000Z

190

Factors Affecting HCCI Combustion Phasing for Fuels with Single...  

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

Affecting HCCI Combustion Phasing for Fuels with Single- and Dual-Stage Chemistry Factors Affecting HCCI Combustion Phasing for Fuels with Single- and Dual-Stage Chemistry 2004...

191

Controlling the quantum state of a single photon emitted from a single polariton  

SciTech Connect (OSTI)

We investigate in detail the optimal conditions for a high fidelity transfer from a single-polariton state to a single-photon state and subsequent homodyne detection of the single photon. We assume that, using various possible techniques, the single polariton has initially been stored as a spin-wave grating in a cloud of cold atoms inside a low-finesse cavity. This state is then transferred to a single-photon optical pulse using an auxiliary beam. We optimize the retrieval efficiency and determine the mode of the local oscillator that maximizes the homodyne efficiency of such a photon. We find that both efficiencies can have values close to one in a large region of experimental parameters.

Stanojevic, Jovica; Parigi, Valentina; Bimbard, Erwan; Tualle-Brouri, Rosa; Ourjoumtsev, Alexei; Grangier, Philippe [Laboratoire Charles Fabry, Institut d'Optique, CNRS, Universite Paris-Sud, Campus Polytechnique, RD 128, FR-91127 Palaiseau cedex (France)

2011-11-15T23:59:59.000Z

192

Symmetry groups of single-wall nanotubes  

Science Journals Connector (OSTI)

An approach to the determination of the symmetry groups of structural analogs of single-wall carbon nanotubes using ideas in color symmetry theory is described. The line group structures of the symmetry groups of BN, BC3, BCN and BC2N nanotubes are identified. An extension of the method to address nanotubes with non-hexagonal symmetry is also presented.

De Las Pe?as, M.L.A.N.

2013-11-26T23:59:59.000Z

193

Single Assessment Pass Rate South Carolina  

E-Print Network [OSTI]

Single Assessment Pass Rate South Carolina Academic Year 2000 - 2001 ETS Type of Assessment Test Code Total Pass % Pass Total Pass % Pass Academic Content Area Education in the Elementary School 0010., & Comp.: Essays 0042 Mathematics 0060 1 1 100% 47 45 96% Chemistry, Physics and General Science 0070 5 3

Kasman, Alex

194

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

195

Parallel MATLAB: Single Program Multiple Data  

E-Print Network [OSTI]

Parallel MATLAB: Single Program Multiple Data John Burkardt (FSU) Gene Cliff (AOE/ICAM - ecliff Research Computing ICAM: Interdisciplinary Center for Applied Mathematics 1 / 67 #12;MATLAB Parallel MATLAB sets up one special agent called the client. MATLAB sets up the requested number of workers, each

Crawford, T. Daniel

196

Parallel MATLAB: Single Program Multiple Data  

E-Print Network [OSTI]

Parallel MATLAB: Single Program Multiple Data John Burkardt (FSU) Gene Cliff (AOE/ICAM - ecliff Research Computing ICAM: Interdisciplinary Center for Applied Mathematics 1 / 67 #12;Matlab Parallel ( 'myscript', 'Profile', ... 'ithaca_R2012a', 'matlabpool', 7 ) 5 / 67 #12;SPMD: The SPMD Environment Matlab

Crawford, T. Daniel

197

Parallel MATLAB: Single Program Multiple Data  

E-Print Network [OSTI]

Parallel MATLAB: Single Program Multiple Data John Burkardt (FSU) Gene Cliff (AOE/ICAM - ecliff: Advanced Research Computing ICAM: Interdisciplinary Center for Applied Mathematics 1 / 69 #12;Matlab ( 'myscript', 'Profile', ... 'ithaca_R2012a', 'matlabpool', 7 ) 5 / 69 #12;SPMD: The SPMD Environment Matlab

Crawford, T. Daniel

198

Parallel MATLAB: Single Program Multiple Data  

E-Print Network [OSTI]

Parallel MATLAB: Single Program Multiple Data John Burkardt (FSU) Gene Cliff (AOE/ICAM - ecliff Research Computing ICAM: Interdisciplinary Center for Applied Mathematics 1 / 66 #12;MATLAB Parallel MATLAB sets up one special worker called the client. MATLAB sets up the requested number of workers, each

Crawford, T. Daniel

199

RISING ECONOMIC INSECURITY AMONG SENIOR SINGLE WOMEN  

E-Print Network [OSTI]

RISING ECONOMIC INSECURITY AMONG SENIOR SINGLE WOMEN Tatjana Meschede Martha Cronin Laura Sullivan paying bills, forgoing home maintenance or medical needs. New research shows that economic insecurity of the Great Recession had been felt--economic insecurity among this population subgroup increased by one

Snider, Barry B.

200

Electro-Optic Modulation of Single Photons  

E-Print Network [OSTI]

We use the Stokes photon of a biphoton pair to set the time origin for electro-optic modulation of the wave function of the anti-Stokes photon thereby allowing arbitrary phase and amplitude modulation. We demonstrate conditional single-photon wave functions composed of several pulses, or instead, having gaussian or exponential shapes.

Pavel Kolchin; Chinmay Belthangady; Shengwang Du; G. Y. Yin; S. E. Harris

2008-08-02T23:59:59.000Z

Note: This page contains sample records for the topic "nanoclusters out-perform single" 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

Nano-optics with single quantum systems  

Science Journals Connector (OSTI)

...April 2004 research-article Theme Issue Nano-optics and near-field microscopy compiled by David Richards and Anatoly Zayats Nano-optics with single quantum systems This...fluorescent molecules, as local probes for nano-optical field distributions. We start...

2004-01-01T23:59:59.000Z

202

Triangular-profile single-mode fiber  

Science Journals Connector (OSTI)

A low-loss triangular-profile single-mode fiber is reported. The fiber loss at 1.3–1.55-?m wavelengths is below 0.4 dB/km, and its zero-chromatic-dispersion wavelength is 1.402 ?m.

Saifi, M A; Cohen, L G; Stone, J; Jang, S J

1982-01-01T23:59:59.000Z

203

Upping fluorescence Paving the way for single-molecule medical  

E-Print Network [OSTI]

Upping fluorescence ­ Paving the way for single-molecule medical sensors The presence to the information content of single molecule fluorescence measurement[2]. Ideally, a single fluorophore should last in the collection of data at the single-molecule level where oxygen efficiently reduces the fluorescence lifetime

Strathclyde, University of

204

Single-Molecule Spectroscopy DOI: 10.1002/anie.201105388  

E-Print Network [OSTI]

Single-Molecule Spectroscopy DOI: 10.1002/anie.201105388 Single-Particle and Ensemble Diffusivities different approaches. The data obtained through the direct observation of dye molecule diffusion by single) with single-molecule sensitivity has recently provided us with a totally new view of diffusion

Ulm, Universität

205

Single-Molecule Spectroscopy DOI: 10.1002/ange.201105388  

E-Print Network [OSTI]

Single-Molecule Spectroscopy DOI: 10.1002/ange.201105388 Single-Particle and Ensemble Diffusivities different approaches. The data obtained through the direct observation of dye molecule diffusion by single) with single-molecule sensitivity has recently provided us with a totally new view of diffusion

Ulm, Universität

206

ccsd00001150 Getting DNA twist rigidity from single molecule  

E-Print Network [OSTI]

ccsd­00001150 (version 1) : 17 Feb 2004 Getting DNA twist rigidity from single molecule experiments to study the extension versus rotation diagrams of single supercoiled DNA molecules. We reproduce single DNA molecules in order to test their mechanical properties. A #12;rst way to manipulate a single

207

Method for preparation of single chain antibodies  

DOE Patents [OSTI]

This invention provides a method for identifying cells expressing a target single chain antibody (scFv) directed against a target antigen from a collection of cells that includes cells that do not express the target scFv, comprising the step of combining the collection of cells with an anti-idiotype directed to an antibody specific for the target antigen and detecting interaction, if any, of the anti-idiotype with the cells, wherein the occurrence of an interaction identifies the cell as one which expresses the target scFv. This invention also provides a method for making a single chain antibody (scFv) directed against an antigen, wherein the selection of clones is made based upon interaction of those clones with an appropriate anti-idiotype, and heretofore inaccessible scFv so made. This invention provides the above methods or any combination thereof. Finally, this invention provides various uses of these methods.

Cheung, Nai-Kong V. (New York, NY); Guo, Hong-fen (New York, NY)

2012-04-03T23:59:59.000Z

208

Single chain elasticity and thermoelasticity of polyethylene  

E-Print Network [OSTI]

Single-chain elasticity of polyethylene at $\\theta$ point up to 90% of stretching with respect to its contour length is computed by Monte-Carlo simulation of an atomistic model in continuous space. The elasticity law together with the free-energy and the internal energy variations with stretching are found to be very well represented by the wormlike chain model up to 65% of the chain elongation, provided the persistence length is treated as a temperature dependent parameter. Beyond this value of elongation simple ideal chain models are not able to describe the Monte Carlo data in a thermodynamic consistent way. This study reinforces the use of the wormlike chain model to interpret experimental data on the elasticity of synthetic polymers in the finite extensibility regime, provided the chain is not yet in its fully stretched regime. Specific solvent effects on the elasticity law and the partition between energetic and entropic contributions to single chain elasticity are investigated.

John T. Titantah; Carlo Pierleoni; Jean-Paul Ryckaert

2002-09-05T23:59:59.000Z

209

Annealing of single lamella nanoparticles of polyethylene  

E-Print Network [OSTI]

We study the change of the size and structure of freely suspended single lamella nanoparticles of polyethylene during thermal annealing in aqueous solutions. Using small-angle x-ray scattering and cryogenic transmission electron microscopy, it is shown that a doubling of the crystalline lamella sandwiched between two amorphous polymer layers is obtained by annealing the nanoparticles at 125 C. This thickening of the crystalline lamella can be understood in terms of an unlooping of polymer chains within a single nanoparticle. In addition a variation of the annealing temperature from 90 C to 115 C demonstrates that the inverse of the crystalline lamellar thickness increases linearly with the annealing temperatures leading to a recrystallization line in a Gibbs-Thomson graph. Since the nanoparticles consist of about only eight polymer chains, they can be considered as a ideal candidates for the experimental realization of equilibrium polymer crystals.

Christophe N. Rochette; Sabine Rosenfeldt; Katja Henzler; Frank Polzer; Matthias Ballauff; Qiong Tong; Stefan Mecking; Markus Drechsler; Theyencheri Narayanan; Ludger Harnau

2011-07-05T23:59:59.000Z

210

Ultrasonic characterization of single drops of liquids  

DOE Patents [OSTI]

Ultrasonic characterization of single drops of liquids. The present invention includes the use of two closely spaced transducers, or one transducer and a closely spaced reflector plate, to form an interferometer suitable for ultrasonic characterization of droplet-size and smaller samples without the need for a container. The droplet is held between the interferometer elements, whose distance apart may be adjusted, by surface tension. The surfaces of the interferometer elements may be readily cleansed by a stream of solvent followed by purified air when it is desired to change samples. A single drop of liquid is sufficient for high-quality measurement. Examples of samples which may be investigated using the apparatus and method of the present invention include biological specimens (tear drops; blood and other body fluid samples; samples from tumors, tissues, and organs; secretions from tissues and organs; snake and bee venom, etc.) for diagnostic evaluation, samples in forensic investigations, and detection of drugs in small quantities.

Sinha, Dipen N. (Los Alamos, NM)

1998-01-01T23:59:59.000Z

211

Chromosome characterization using single fluorescent dye  

DOE Patents [OSTI]

Chromosomes are characterized by fluorescent emissions from a single fluorescent dye that is excited over two different wavelengths. A mixture containing chromosomes is stained with a single dye selected from the group consisting of TOTO and YOYO and the stained chromosomes are placed in a flow cytometer. The fluorescent dye is excited sequentially by a first light having a wavelength in the ultraviolet range to excite the TOTO or YOYO to fluoresce at a first intensity and by a second light having a wavelength effective to excite the TOTO or YOYO dye to fluoresce at a second intensity. Specific chromosomes may be identified and sorted by intensity relationships between the first and second fluorescence emissions.

Crissman, Harry A. (Los Alamos, NM); Hirons, Gregory T. (Irvine, CA)

1995-01-01T23:59:59.000Z

212

Neutron detection with single crystal organic scintillators  

SciTech Connect (OSTI)

Detection of high-energy neutrons in the presence of gamma radiation background utilizes pulse-shape discrimination (PSD) phenomena in organics studied previously only with limited number of materials, mostly liquid scintillators and single crystal stilbene. The current paper presents the results obtained with broader varieties of luminescent organic single crystals. The studies involve experimental tools of crystal growth and material characterization in combination with the advanced computer modeling, with the final goal of better understanding the relevance between the nature of the organic materials and their PSD properties. Special consideration is given to the factors that may diminish or even completely obscure the PSD properties in scintillating crystals. Among such factors are molecular and crystallographic structures that determine exchange coupling and exciton mobility in organic materials and the impurity effect discussed on the examples of trans-stilbene, bibenzyl, 9,10-diphenylanthracene and diphenylacetylene.

Zaitseva, N; Newby, J; Hamel, S; Carman, L; Faust, M; Lordi, V; Cherepy, N; Stoeffl, W; Payne, S

2009-07-15T23:59:59.000Z

213

Information capacity of a single photon  

Science Journals Connector (OSTI)

Quantum states of light are the obvious choice for communicating quantum information. To date, encoding information into the polarization states of single photons has been widely used as these states form a natural closed two-state qubit. However, photons are able to encode much more—in principle, infinite—information via the continuous spatiotemporal degrees of freedom. Here we consider the information capacity of an optical quantum channel, such as an optical fiber, where a spectrally encoded single photon is the means of communication. We use the Holevo bound to calculate an upper bound on the channel capacity, and relate this to the spectral encoding basis and the spectral properties of the channel. Further, we derive analytic bounds on the capacity of such channels, and, in the case of a symmetric two-state encoding, calculate the exact capacity of the corresponding channel.

Peter P. Rohde; Joseph F. Fitzsimons; Alexei Gilchrist

2013-08-09T23:59:59.000Z

214

Single-molecule studies of riboswitch folding  

Science Journals Connector (OSTI)

Abstract The folding dynamics of riboswitches are central to their ability to modulate gene expression in response to environmental cues. In most cases, a structural competition between the formation of a ligand-binding aptamer and an expression platform (or some other competing off-state) determines the regulatory outcome. Here, we review single-molecule studies of riboswitch folding and function, predominantly carried out using single-molecule FRET or optical trapping approaches. Recent results have supplied new insights into riboswitch folding energy landscapes, the mechanisms of ligand binding, the roles played by divalent ions, the applicability of hierarchical folding models, and kinetic vs. thermodynamic control schemes. We anticipate that future work, based on improved data sets and potentially combining multiple experimental techniques, will enable the development of more complete models for complex RNA folding processes. This article is part of a Special Issue entitled: Riboswitches.

Andrew Savinov; Christian F. Perez; Steven M. Block

2014-01-01T23:59:59.000Z

215

Single transmission line data acquisition system  

DOE Patents [OSTI]

A single transmission line interrogated multiple channel data acquisition system is provided in which a plurality of remote station/sensors monitor specific process variables and transmit measurement values over the single transmission line to a master station when addressed by the master station. Power for all remote stations (up to 980) is provided by driving the line with constant voltage supplied from the master station and automatically maintained independent of the number of remote stations directly connected to the line. The transmission line can be an RG-62 coaxial cable with lengths up to about 10,000 feet with branches up to 500 feet. The remote stations can be attached randomly along the line. The remote stations can be scanned at rates up to 980 channels/second.

Fasching, George E. (Morgantown, WV)

1984-01-01T23:59:59.000Z

216

Tapered fiber coupling of single photons emitted by a deterministically positioned single nitrogen vacancy center  

SciTech Connect (OSTI)

A diamond nano-crystal hosting a single nitrogen vacancy (NV) center is optically selected with a confocal scanning microscope and positioned deterministically onto the subwavelength-diameter waist of a tapered optical fiber (TOF) with the help of an atomic force microscope. Based on this nano-manipulation technique, we experimentally demonstrate the evanescent coupling of single fluorescence photons emitted by a single NV-center to the guided mode of the TOF. By comparing photon count rates of the fiber-guided and the free-space modes and with the help of numerical finite-difference time domain simulations, we determine a lower and upper bound for the coupling efficiency of (9.5?±?0.6)% and (10.4?±?0.7)%, respectively. Our results are a promising starting point for future integration of single photon sources into photonic quantum networks and applications in quantum information science.

Liebermeister, Lars, E-mail: lars.liebermeister@physik.uni-muenchen.de; Petersen, Fabian; Münchow, Asmus v.; Burchardt, Daniel; Hermelbracht, Juliane; Tashima, Toshiyuki [Fakultät für Physik, Ludwig-Maximilians-Universität München, 80799 München (Germany); Schell, Andreas W.; Benson, Oliver [Institut für Physik, Humboldt-Universität zu Berlin, 12489 Berlin (Germany); Meinhardt, Thomas; Krueger, Anke [Institut für Organische Chemie, Universität Würzburg, 97074 Würzburg (Germany); Wilhelm Conrad Roentgen Research Center for Complex Materials Systems, Universität Würzburg, 97074 Würzburg (Germany); Stiebeiner, Ariane; Rauschenbeutel, Arno [Atominstitut, Technische Universität Wien, 1020 Wien (Austria); Weinfurter, Harald; Weber, Markus, E-mail: markusweber@lmu.de [Fakultät für Physik, Ludwig-Maximilians-Universität München, 80799 München (Germany); Max-Planck-Institut für Quantenoptik, 85748 Garching (Germany)

2014-01-20T23:59:59.000Z

217

Copper diffusion in single-crystal ?-Zr  

Science Journals Connector (OSTI)

Tracer diffusion of Cu64 in ?-Zr single crystals has been measured in the temperature range (615-860)°C. The temperature dependences of the Cu64 diffusion coefficients in directions parallel to and perpendicular to the c axis are given by D?=0.40e-1.54 eVkT and D?=0.25e-1.60 eVkT cm2/sec, respectively. The results are discussed in terms of an interstitial diffusion mechanism.

G. M. Hood and R. J. Schultz

1975-05-15T23:59:59.000Z

218

Acoustic Energy Storage in Single Bubble Sonoluminescence  

E-Print Network [OSTI]

Single bubble sonoluminescence is understood in terms of a shock focusing towards the bubble center. We present a mechanism for significantly enhancing the effect of shock focusing, arising from the storage of energy in the acoustic modes of the gas. The modes with strongest coupling are not spherically symmetric. The storage of acoustic energy gives a framework for understanding how light intensities depend so strongly on ambient gases and liquids and suggests that the light intensities of successive flashes are highly correlated.

Michael P. Brenner; Sascha Hilgenfeldt; Detlef Lohse; Rodolfo R. Rosales

1996-05-07T23:59:59.000Z

219

1993 NEC 1) (Single-Walled Carbon  

E-Print Network [OSTI]

MWNT (Vapor-grown carbon fiber, VGCF)33) 10001300 34) SWNT CCVD Smalley 15) CO SWNT SWNT 1993 NEC 1) (Single-Walled Carbon Nanotubes, SWNTs) 1(a) 1nm µm µm SWNTs 2) (MWNTs) 1(c 29,30,35-41) SWNT , MgO Fe/Co, Ni/Co, Mo/Co nm SWNT VGCF Fe(CO)5 SWNT Ethanol tank Hot

Maruyama, Shigeo

220

Single-mode fiber, velocity interferometry  

SciTech Connect (OSTI)

In this paper, we describe a velocity interferometer system based entirely on single-mode fiber optics. This paper includes a description of principles used in developing the single-mode velocity interferometry system (SMV). The SMV design is based on polarization-insensitive components. Polarization adjusters are included to eliminate the effects of residual birefringence and polarization dependent losses in the interferometers. Characterization measurements and calibration methods needed for data analysis and a method of data analysis are described. Calibration is performed directly using tunable lasers. During development, we demonstrated its operation using exploding-foil bridge-wire fliers up to 200 m/s. In a final test, we demonstrated the SMV in a gas gun experiment up to 1.2 km/sec. As a basis for comparison in the gas gun experiment, we used another velocimetry technique that is also based on single-mode fiber optics: photonic Doppler velocimetry (PDV). For the gas gun experiment, we split the light returned from a single target spot and performed a direct comparison of the homodyne (SMV) and heterodyne (PDV) techniques concurrently. The two techniques had a negligible mean difference and a 1.5% standard deviation in the one-dimensional shock zone. Within one interferometer delay time after a sudden Doppler shift, a SMV unencumbered by multimode-fiber dispersion exhibits two color beats. These beats have the same period as PDV beats--this interference occurs between the ''recently'' shifted and ''formerly unshifted'' paths within the interferometer. We believe that recognizing this identity between homodyne and heterodyne beats is novel in the shock-physics field. SMV includes the conveniences of optical fiber, while removing the time resolution limitations associated with the multimode delivery fiber.

Krauter, K. G.; Jacobson, G. F.; Patterson, J. R.; Nguyen, J. H.; Ambrose, W. P. [Lawrence Livermore National Laboratory, 7000 East Ave., Livermore California 94551 (United States)

2011-04-15T23:59:59.000Z

Note: This page contains sample records for the topic "nanoclusters out-perform single" 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

ARTICLES ON SINGLE-MOLECULE PHYSICS AND CHEMISTRY Direct measurements of memory effects in single-molecule kinetics  

E-Print Network [OSTI]

ARTICLES ON SINGLE-MOLECULE PHYSICS AND CHEMISTRY Direct measurements of memory effects in single-molecule and correlations of single-molecule sequences of modulated reactions are explicitly evaluated in the stochastic of the stochastic rate expression, characterizes the correlation in single-molecule rate processes in a formalism

Cao, Jianshu

222

Lommerse et al. Single-Molecule Imaging ... Single-molecule imaging of lipid-anchored proteins reveals  

E-Print Network [OSTI]

Lommerse et al. Single-Molecule Imaging ... 1 Single-molecule imaging of lipid-anchored proteins in "Biophys J 86, 1 Pt 1 (2004) 609-16" #12;Lommerse et al. Single-Molecule Imaging ... 2 Manuscript, fluorescence recovery after photobleaching hal-00143982,version1-29Apr2007 #12;Lommerse et al. Single-Molecule

Boyer, Edmond

223

FLOP Counts for Single-Node Tests  

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

FLOP Counts for "Small" Single-Node Miniapplication Tests FLOP Counts for "Small" Single-Node Miniapplication Tests FLOP Counts for "Small" Single-Node Miniapplication Tests These data, obtained using the NERSC Hopper system, are provided for reference. Code MPI Tasks Threads Reference TFLOP Count Benchmark Time (seconds) # of iterations miniFE 144 1 5.05435E+12 130.2 (total program time) miniGhost 96 1 6.55500E+12 76.5 AMG 96 1 1.30418E+12 66.95 18 UMT 96 1 1.30211E+13 416.99 49 SNAP 96 1 5.84246E+11 15.37 3059 miniDFT 40 1 2.32379E+13 153.97 GTC 64 1 6.63670E+13 1839.4 MILC 24 1 1.45971E+13 744.3 CORRECTION (02 August 2013): The values given for the reference counts are FLOPs, not TFLOPs. Last edited: 2013-08-02 09:40:18

224

Panoramic Holography: Toward a Single Shot Stopwatch  

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

Panoramic Holography: Toward a Single Panoramic Holography: Toward a Single Shot Stopwatch Panoramic images are captivating in any form, be it of a city sky line or a mosaic of micrographs. They feature a wide field of view and uncompromised resolution. Forming such extraordinary images can be achieved with oversized film or by stitching together smaller images. But these options are not always practical for microscopy with x-rays especially for imaging with ultrashort pulses of x-rays. We have demonstrated a new holographic technique, called extended field of view Fourier transform holography (FTH), for imaging isolated areas of a nanoscale sample without compromising spatial resolution. This technique overcomes one of the central challenges in imaging, namely to simultaneously obtain high spatial resolution and a large field of view. The method is compatible with single shot imaging-a feature particularly important for studying dynamics at upcoming X-ray free electron lasers like the Linac Coherent Light Source (LCLS) at SLAC.

225

Single-atom cavity QED and optomicromechanics  

SciTech Connect (OSTI)

In a recent publication [K. Hammerer, M. Wallquist, C. Genes, M. Ludwig, F. Marquardt, P. Treutlein, P. Zoller, J. Ye, and H. J. Kimble, Phys. Rev. Lett. 103, 063005 (2009)] we have shown the possibility to achieve strong coupling of the quantized motion of a micron-sized mechanical system to the motion of a single trapped atom. In the proposed setup the coherent coupling between a SiN membrane and a single atom is mediated by the field of a high finesse cavity and can be much larger than the relevant decoherence rates. This makes the well-developed tools of cavity quantum electrodynamics with single atoms available in the realm of cavity optomechanics. In this article we elaborate on this scheme and provide detailed derivations and technical comments. Moreover, we give numerical as well as analytical results for a number of possible applications for transfer of squeezed or Fock states from atom to membrane as well as entanglement generation, taking full account of dissipation. In the limit of strong-coupling the preparation and verification of nonclassical states of a mesoscopic mechanical system is within reach.

Wallquist, M.; Hammerer, K.; Zoller, P.; Genes, C.; Ludwig, M.; Marquardt, F.; Treutlein, P.; Ye, J.; Kimble, H. J. [Institute for Theoretical Physics, University of Innsbruck, and Institute for Quantum Optics and Quantum Communication, Austrian Academy of Sciences, Technikerstrasse 25, 6020 Innsbruck, Austria and Norman Bridge Laboratory of Physics 12-33, California Institute of Technology, Pasadena, California 91125 (United States); Institute for Theoretical Physics, University of Innsbruck, and Institute for Quantum Optics and Quantum Communication, Austrian Academy of Sciences, Technikerstrasse 25, 6020 Innsbruck (Austria); Department of Physics, Center for NanoScience, and Arnold Sommerfeld Center for Theoretical Physics, Ludwig-Maximilians-Universitaet Muenchen, Theresienstr. 37, D-80333 Munich (Germany); Max-Planck-Institute of Quantum Optics and Department of Physics, Ludwig-Maximilians-Universitaet Muenchen, Schellingstr. 4, D-80799 Munich (Germany); JILA, National Institute of Standards and Technology and University of Colorado, Boulder, Colorado 80309-0440, USA and Norman Bridge Laboratory of Physics 12-33, California Institute of Technology, Pasadena, California 91125 (United States); Norman Bridge Laboratory of Physics 12-33, California Institute of Technology, Pasadena, California 91125 (United States)

2010-02-15T23:59:59.000Z

226

Single track effects, biostack and risk assessment  

SciTech Connect (OSTI)

This talk addresses the single-track nature of the space radiation environment, and points out the importance of single hits'' in the evaluation of radiation risk for long-term missions occurring outside the earth's magnetic field. A short review is made of biological objects found to show increased effects when hit'' by a single heavy charged-particle in space. A brief discussion is given of the most provocative results from the bacterial spore B. subtilis: experimental evidence that tracks can affect biological systems at much larger distances from the trajectory than previously suspected, and that the resultant inactivation cross section in space calculated for this system is very large. When taken at face value, the implication of these results, when compared to those from experiments performed at ground-based accelerators with beams at low energies in the same LET range, is that high-energy particles can exert their influence a surprising distance from their trajectory and the inactivation cross sections are some twenty times larger than expected. Clearly, beams from high-energy heavy-ion accelerators should be used to confirm these results. For those end points that can also be caused by low-LET beams such as high-energy protons, it is important to measure their action cross sections as well. The ratio of the cross sections for a high-LET beam to that of a low-LET beam is an interesting experimental ratio and, we suggest, of more intrinsic interest than the RBE. It is a measure of the biological'' importance of one particle type relative to another particle type. This ratio will be introduced and given the name RPPE (Relative Per Particle Effectiveness). Values of RPPE will be discussed.

Curtis, S.B.

1992-10-01T23:59:59.000Z

227

Single track effects, biostack and risk assessment  

SciTech Connect (OSTI)

This talk addresses the single-track nature of the space radiation environment, and points out the importance of single ``hits`` in the evaluation of radiation risk for long-term missions occurring outside the earth`s magnetic field. A short review is made of biological objects found to show increased effects when ``hit`` by a single heavy charged-particle in space. A brief discussion is given of the most provocative results from the bacterial spore B. subtilis: experimental evidence that tracks can affect biological systems at much larger distances from the trajectory than previously suspected, and that the resultant inactivation cross section in space calculated for this system is very large. When taken at face value, the implication of these results, when compared to those from experiments performed at ground-based accelerators with beams at low energies in the same LET range, is that high-energy particles can exert their influence a surprising distance from their trajectory and the inactivation cross sections are some twenty times larger than expected. Clearly, beams from high-energy heavy-ion accelerators should be used to confirm these results. For those end points that can also be caused by low-LET beams such as high-energy protons, it is important to measure their action cross sections as well. The ratio of the cross sections for a high-LET beam to that of a low-LET beam is an interesting experimental ratio and, we suggest, of more intrinsic interest than the RBE. It is a measure of the ``biological`` importance of one particle type relative to another particle type. This ratio will be introduced and given the name RPPE (Relative Per Particle Effectiveness). Values of RPPE will be discussed.

Curtis, S.B.

1992-10-01T23:59:59.000Z

228

Single Z Production at the Tevatron  

SciTech Connect (OSTI)

The production of single Z bosons has been studied at Fermilab's Tevatron by the CDF and D0 collaborations. Measurements include the weak mixing angle, vector and axial-vector couplings between Z bosons and light quarks, and angular coefficients in electronic decays which are sensitive to the spin of the gluon. The collaborations have looked for and indication of new physics above the mass scale that can be directly produced at the Tevatron by studying the interference between Z and photon propagators. All measurements are consistent with Standard Model expectations.

Phillips, Thomas J.

2012-05-01T23:59:59.000Z

229

Transient Rayleigh scattering from single semiconductor nanowires  

SciTech Connect (OSTI)

Transient Rayleigh scattering spectroscopy is a new pump-probe technique to study the dynamics and cooling of photo-excited carriers in single semiconductor nanowires. By studying the evolution of the transient Rayleigh spectrum in time after excitation, one can measure the time evolution of the density and temperature of photo-excited electron-hole plasma (EHP) as they equilibrate with lattice. This provides detailed information of dynamics and cooling of carriers including linear and bimolecular recombination properties, carrier transport characteristics, and the energy-loss rate of hot electron-hole plasma through the emission of LO and acoustic phonons.

Montazeri, Mohammad; Jackson, Howard E.; Smith, Leigh M. [Department of Physics, University of Cincinnati, Cincinnati, OH 45221-0011 (United States); Yarrison-Rice, Jan M. [Department of Physics, Miami University, Oxford, OH 45056 (United States); Kang, Jung-Hyun; Gao, Qiang; Tan, Hark Hoe; Jagadish, Chennupati [Department of Electronic Materials Engineering, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 0200 (Australia)

2013-12-04T23:59:59.000Z

230

Statistics of Single-Molecule Detection  

Science Journals Connector (OSTI)

Statistics of Single-Molecule Detection ... K(ti+1,ti,r?i+1,r?i) is the probability that no photon is detected and no photobleaching happens between ti and ti+1, if the molecule was at position r?i at time ti and at position r?i+1 at time ti+1 and ?tVf(r?) and ?tVbl(r?) are the probabilities to detect a photon and to photobleach the molecule within time ?t, respectively, if the molecule is at position r?. ... fluorescence without statistical anal. ...

Jörg Enderlein; David L. Robbins; W. Patrick Ambrose; Peter M. Goodwin; Richard A. Keller

1997-05-01T23:59:59.000Z

231

Quantum thermal machines with single nonequilibrium environments  

E-Print Network [OSTI]

We propose a scheme for a quantum thermal machine made by atoms interacting with a single non-equilibrium electromagnetic field. The field is produced by a simple configuration of macroscopic objects held at thermal equilibrium at different temperatures. We show that these machines can deliver all thermodynamic tasks (cooling, heating and population inversion), and this by establishing quantum coherence with the body on which they act. Remarkably, this system allows to reach efficiencies at maximum power very close to the Carnot limit, much more than in existing models. Our findings offer a new paradigm for efficient quantum energy flux management, and can be relevant for both experimental and technological purposes.

Bruno Leggio; Bruno Bellomo; Mauro Antezza

2015-01-08T23:59:59.000Z

232

Single stage rankine and cycle power plant  

SciTech Connect (OSTI)

The specification describes a Rankine cycle power plant of the single stage type energized by gasified freon, the latter being derived from freon in the liquid state in a boiler provided in the form of a radio frequency heating cell adapted at low energy input to effect a rapid change of state from liquid freon at a given temperature and pressure to gaseous freon of relatively large volume, thereby to drive a Rankine cycle type of engine recognized in the prior art as a steam engine type of engine of the piston or turbine type.

Closs, J.J.

1981-10-13T23:59:59.000Z

233

Single atom as a macroscopic entanglement source  

E-Print Network [OSTI]

by many authors including the generation of entangled coherent state #3;1?3#4;, single photon and vacuum entanglement #3;4#4;, and two-atom entanglement #3;5#4;. More recently, generation of macroscopic entangled states via phase sensitive... cascade configuration crossing or trapped in a two-mode field cavity. The atomic level configuration is depicted in Fig. 1. The two atomic transitions #5;a#6;? #5;b#6; and #5;b#6;? #5;c#6; interact with the two cavity modes with detunings #1...

Zhou, Ling; Xiong, Han; Zubairy, M. Suhail.

2006-01-01T23:59:59.000Z

234

Controlled synthesis of single-crystalline graphene  

SciTech Connect (OSTI)

This paper reports the controlled synthesis of single-crystalline graphene on the back side of copper foil using CH{sub 4} as the precursor. The influence of growth time and the pressure ratio of CH{sub 4}/H{sub 2} on the structure of graphene are examined. An optimized polymer-assisted method is used to transfer the synthesized graphene onto a SiO{sub 2}/Si substrate. Scanning electron microscopy and Raman spectroscopy are used to characterize the graphene.

Xueshen, Wang, E-mail: wangxs@nim.ac.cn; Jinjin, Li, E-mail: jinjinli@nim.ac.cn; Qing, Zhong; Yuan, Zhong; Mengke, Zhao; Yonggang, Liu [National Institute of Metrology, Beijing, China, 100013 (China)] [National Institute of Metrology, Beijing, China, 100013 (China)

2014-03-15T23:59:59.000Z

235

Single-ion nonlinear mechanical oscillator  

SciTech Connect (OSTI)

We study the steady-state motion of a single trapped ion oscillator driven to the nonlinear regime. Damping is achieved via Doppler laser cooling. The ion motion is found to be well described by the Duffing oscillator model with an additional nonlinear damping term. We demonstrate here the unique ability of tuning both the linear as well as the nonlinear damping coefficients by controlling the laser-cooling parameters. Our observations pave the way for the investigation of nonlinear dynamics on the quantum-to-classical interface as well as mechanical noise squeezing in laser-cooling dynamics.

Akerman, N.; Kotler, S.; Glickman, Y.; Dallal, Y.; Keselman, A.; Ozeri, R. [Physics of Complex Systems, Weizmann Institute of Science, Rehovot 76100 (Israel)

2010-12-15T23:59:59.000Z

236

Neutron single target spin asymmetries in SIDIS  

SciTech Connect (OSTI)

The experiment E06-010 in Hall A at Jefferson Lab took data between November 2008 and February 2009 to directly measure, for the first time, the pion (and kaon) single "neutron" target-spin asymmetry (SSA) in semi-inclusive DIS from a polarized 3He target. Collins, Sivers (and Pretzelosity) neutron asymmetries are going to be extracted from the measured SSA. Details of the experiment are described together with the preliminary results of the ongoing analysis. Near future Hall A experiments on transverse nucleon spin structure are shorty reviewed.

Evaristo Cisbani

2010-04-01T23:59:59.000Z

237

Ultrasonic characterization of single drops of liquids  

DOE Patents [OSTI]

Ultrasonic characterization of single drops of liquids is disclosed. The present invention includes the use of two closely spaced transducers, or one transducer and a closely spaced reflector plate, to form an interferometer suitable for ultrasonic characterization of droplet-size and smaller samples without the need for a container. The droplet is held between the interferometer elements, whose distance apart may be adjusted, by surface tension. The surfaces of the interferometer elements may be readily cleansed by a stream of solvent followed by purified air when it is desired to change samples. A single drop of liquid is sufficient for high-quality measurement. Examples of samples which may be investigated using the apparatus and method of the present invention include biological specimens (tear drops; blood and other body fluid samples; samples from tumors, tissues, and organs; secretions from tissues and organs; snake and bee venom, etc.) for diagnostic evaluation, samples in forensic investigations, and detection of drugs in small quantities. 5 figs.

Sinha, D.N.

1998-04-14T23:59:59.000Z

238

Single neutralino production at the LHC  

Science Journals Connector (OSTI)

We consider that the direct production of a single neutralino in a proton-proton collision at the CERN Large Hadron Collider focusing on the lightest neutralino is possibly a candidate for dark matter and escapes detection. We present a comprehensive investigation of the dependence of total cross sections of the processes pp(qq¯)??˜i0g˜, pp(qg)??˜i0q˜L,R, and pp(qq¯?)??˜i0?˜j+ at tree level and pp(gg)??˜i0g˜ at one-loop level, on the center-of-mass energy, on the M2-? mass plane, on the squark mass, and on the tan?? for the Constrained Minimal Supersymmetric Standard Model and three extremely different scenarios in the Minimal Supersymmetric Standard Model. In particular, the cross section of the process pp??˜20?˜1+ in the gauginolike scenario can reach about 0.6 (1.7) pb at a center-of-mass energy of s=7(14)??TeV. We extract therefrom that our results might lead to new aspects corresponding to experimental explorations, and these dependencies might be used as the bases of experimental research of the single neutralino production at hadron colliders.

A. I. Ahmadov and M. Demirci

2013-07-12T23:59:59.000Z

239

85,000-GPM, single-stage, single-suction LMFBR intermediate centrifugal pump  

SciTech Connect (OSTI)

The mechanical and hydraulic design features of the 85,000-gpm, single-stage, single-suction pump test article, which is designed to circulate liquid-sodium coolant in the intermediate heat-transport system of a Large-Scale Liquid Metal Fast Breeder Reactor (LS-LMFBR), are described. The design and analytical considerations used to satisfy the pump performance and operability requirements are presented. The validation of pump hydraulic performance using a hydraulic scale-model pump is discussed, as is the featute test for the mechanical-shaft seal system.

Fair, C.E.; Cook, M.E. Huber, K.A.; Rohde, R.

1983-01-01T23:59:59.000Z

240

High sensitivity fluorescent single particle and single molecule detection apparatus and method  

DOE Patents [OSTI]

Apparatus is described for ultrasensitive detection of single fluorescent particles down to the single fluorescent molecule limit in a fluid or on a substrate comprising means for illuminating a predetermined volume of the fluid or area of the substrate whereby to emit light including background light from the fluid and burst of photons from particles residing in the area. The photon burst is detected in real time to generate output representative signal. The signal is received and the burst of energy from the fluorescent particles is distinguished from the background energy to provide an indication of the number, location or concentration of the particles or molecules.

Mathies, Richard A. (Contra Costa County, CA); Peck, Konan (Contra Costa County, CA); Stryer, Lubert (Santa Clara County, CA)

1990-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "nanoclusters out-perform single" 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

Adaptive Power Control for Single and Multiuser Opportunistic Systems  

E-Print Network [OSTI]

In this dissertation, adaptive power control for single and multiuser opportunistic systems is investigated. First, a new adaptive power-controlled diversity combining scheme for single user systems is proposed, upon which is extended...

Nam, Sung Sik

2010-07-14T23:59:59.000Z

242

Single Payment Vendor Number Request Page 1 of 1  

E-Print Network [OSTI]

. Each payment must be less then $600.00 and may not be a royalty payment. The Single Payment Vendor not be a royalty payment. The single payment vendor number is used for refunds of deposits, human subject payments

Weiblen, George D

243

File:RAPID Single Slide.pdf | Open Energy Information  

Open Energy Info (EERE)

Single Slide.pdf Jump to: navigation, search File File history File usage Metadata File:RAPID Single Slide.pdf Size of this preview: 776 600 pixels. Go to page 1 2 Go next page...

244

Single nucleotide polymorphism discovery in elite north american potato germplasm  

E-Print Network [OSTI]

Single nucleotide polymorphism discovery in elite north american potato germplasm Hamilton et al;RESEARCH ARTICLE Open Access Single nucleotide polymorphism discovery in elite north american potato breeding approaches in potato rely almost entirely on phenotypic evaluations; molecular markers

Douches, David S.

245

Single microbe trap and release in sub-microfluidics. | EMSL  

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

Single microbe trap and release in sub-microfluidics. Single microbe trap and release in sub-microfluidics. Abstract: Lab-on-a-chip systems have substantially impacted the way...

246

Symmetry Breaking of H2 Dissociation by a Single Photon  

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

Symmetry Breaking of H2 Dissociation by a Single Photon Print A single hydrogen (or deuterium) molecule consists of only two protons (deuterons) and two electrons and is perfectly...

247

Single-molecule detection and tracking in plants  

Science Journals Connector (OSTI)

Combining optical properties with a limited choice of fluorophores turns single-molecule imaging in plants into a challenging task. ... however, also apply to the application of single-molecule microscopy to any ...

Markus Langhans; Tobias Meckel

2014-03-01T23:59:59.000Z

248

Single-molecule microscopy study of nano-systems.  

E-Print Network [OSTI]

??In this work, techniques were developed and used to study the properties of molecules on a single-molecule level. Single-molecule techniques have the major advantage, that… (more)

Heiss, Gregor

2011-01-01T23:59:59.000Z

249

Sandia National Laboratories: BES Web Highlight: Single-mode...  

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

ClimateECEnergyEnergy EfficiencyBES Web Highlight: Single-mode gallium nitride nanowire lasers BES Web Highlight: Single-mode gallium nitride nanowire lasers "Solid-state Lighting:...

250

Single-molecule electron transfer reactions in nanomaterials  

SciTech Connect (OSTI)

Here we report the study of single molecule electron transfer dynamics by coupling fluorescence microscopy at a conventional electrochemical cell. The single-molecule fluorescence spectroelectrochemistry of cresyl violet in aqueous solution and on nanoparticle surface were studied. We observed that the single-molecule fluorescence intensity of cresyl violet is modulated synchronously with the cyclic voltammetric potential scanning. We attribute the fluorescence intensity change of single cresyl violet molecules to the electron transfer reaction driven by the electrochemical potential.

Hu, Dehong; Lei, Chenghong; Ackerman, Eric J.

2009-07-26T23:59:59.000Z

251

Single channel recordings of K+ currents in squid axons  

Science Journals Connector (OSTI)

... channels are illustrated on the single channel level, and some more detailed features of the elementary current contribution are indicated.

Franco Conti; Erwin Neher

1980-05-15T23:59:59.000Z

252

Cognitive Single Carrier Systems: Joint Impact of Multiple Licensed Transceivers  

E-Print Network [OSTI]

Cognitive Single Carrier Systems: Joint Impact of Multiple Licensed Transceivers Kyeong Jin Kim of interference from multiple licensed transceivers on cognitive underlay single carrier systems is examined, and 3) interference power from the primary transmitters. For this cognitive underlay single carrier

Elkashlan, Maged

253

Single-electron inverter C. P. Heij,a)  

E-Print Network [OSTI]

Single-electron inverter C. P. Heij,a) P. Hadley, and J. E. Mooij Applied Physics and DIMES, Delft for publication 8 December 2000 A single-electron inverter was fabricated that switches from a high output of the inverter, the two single-electron transistors that make up the inverter must exhibit voltage gain. Voltage

254

3D RECONSTRUCTION FROM A SINGLE IMAGE Diego Rother  

E-Print Network [OSTI]

3D RECONSTRUCTION FROM A SINGLE IMAGE By Diego Rother and Guillermo Sapiro IMA Preprint Series. 1 3D Reconstruction from a Single Image Diego Rother and Guillermo Sapiro Abstract-- A probabilistic framework for 3D object reconstruction from a single image is introduced in this work. First

255

A Single-Molecule Study of RNA Catalysis and Folding  

E-Print Network [OSTI]

A Single-Molecule Study of RNA Catalysis and Folding Xiaowei Zhuang,1 * Laura E. Bartley,2 * Hazen and undocks from the ribozyme core was observed directly in single-molecule time trajectories, allowing. These results establish single-molecule fluorescence as a pow- erful tool for examining RNA folding. Virtually

Herschlag, Dan

256

Statistics and Related Topics in Single-Molecule Biophysics  

E-Print Network [OSTI]

Statistics and Related Topics in Single-Molecule Biophysics Hong Qian1 and S.C. Kou2 1 Department macromolecules one at a time in action, the field of single- molecule biophysics has witnessed extensive growth in both experiments and theory since then. A distinct feature of single-molecule biophysics

Borenstein, Elhanan

257

Dependence of single molecule junction conductance on molecular conformation  

E-Print Network [OSTI]

1 Dependence of single molecule junction conductance on molecular conformation Latha Venkataraman1 of a single metal-molecule-metal junction depends not only on the chemical nature of the molecule used in unimolecular devices. Here, using amine link groups13 to form single molecule junctions, we show a clear

Hone, James

258

Single-molecule analysis of DNA-protein complexes  

E-Print Network [OSTI]

Single-molecule analysis of DNA-protein complexes using nanopores Breton Hornblower1,2, Amy Coombs1. In contrast, single-molecule measurements can reveal information masked by ensemble averaging in bulk with single-molecule approaches, hun- dreds of copies of the same complex must be analyzed. This often

Meller, Amit

259

Single-Molecule Dynamics and Mechanisms of Metalloregulators and Metallochaperones  

E-Print Network [OSTI]

Single-Molecule Dynamics and Mechanisms of Metalloregulators and Metallochaperones Peng Chen in using single-molecule fluorescence imaging techniques to identify the mechanisms of metal homeostaticR-family metalloregulators and copper chaperones can fulfill their functions. This work also summarizes other related single-molecule

Chen, Peng

260

Combined single-molecule force and fluorescence measurements for biology  

E-Print Network [OSTI]

Minireview Combined single-molecule force and fluorescence measurements for biology Mark I Wallace, some of which allow cellular processes to be examined at the level of a single molecule. In particular of resolv- ing single molecules in aqueous solution at room tempera- ture [1-7]. Now that the field is over

Wallace, Mark

Note: This page contains sample records for the topic "nanoclusters out-perform single" 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

Single-Molecule Circuits with Well-Defined Molecular Conductance  

E-Print Network [OSTI]

Single-Molecule Circuits with Well-Defined Molecular Conductance Latha Venkataraman,*,,| Jennifer E conductance measurements of single molecules. For an alkane diamine series with 2-8 carbon atoms leads to well-defined conductance measurements of a single molecule junction in a statistical study

Hone, James

262

The Relation between Structure and Quantum Interference in Single Molecule  

E-Print Network [OSTI]

The Relation between Structure and Quantum Interference in Single Molecule Junctions Troels pathways has recently attracted increased interest as an enabling tool for single- molecule electronic) to control the current flow through single-molecule devices has recently intensified.1-14 The idea

Thygesen, Kristian

263

Single-Molecule Magnetic Tweezers Studies of Type IB Topoisomerases  

E-Print Network [OSTI]

Chapter 7 Single-Molecule Magnetic Tweezers Studies of Type IB Topoisomerases Jan Lipfert, Daniel A the application of single-molecule force spectroscopy techniques to the study of topoisomerases. Magnetic tweezers properties of type IB topoisomerases can be monitored using this technique. Key words: Single-molecule

Dekker, Nynke

264

Thermopower of single-molecule devices Jens Koch,1  

E-Print Network [OSTI]

Thermopower of single-molecule devices Jens Koch,1 Felix von Oppen,1 Yuval Oreg,2 and Eran Sela2 1 May 2004; published 12 November 2004) We investigate the thermopower of single molecules weakly through single molecules (cf. Ref. 20). (2) Ap- proaches based on a parametric modeling of relevant mo

von Oppen, Felix

265

Nanocavity plasmonic device for ultrabroadband single molecule sensing  

E-Print Network [OSTI]

Nanocavity plasmonic device for ultrabroadband single molecule sensing Ryan M. Gelfand, Lukas.2235, 140.4780. Label-free single molecule detection is an exciting av- enue of study that will impact many detection time. Therefore, photonic sensing has become an attractive method for single molecule detection [7

Mohseni, Hooman

266

Nanochannel-Based Single Molecule Recycling John F. Lesoine,  

E-Print Network [OSTI]

Nanochannel-Based Single Molecule Recycling John F. Lesoine, Prahnesh A. Venkataraman, Peter C for measuring the fluorescence from a single molecule hundreds of times without surface immobilization. The approach is based on the use of electroosmosis to repeatedly drive a single target molecule in a fused

Novotny, Lukas

267

Quantitative Characterization of Filament Dynamics by Single-Molecule Lifetime  

E-Print Network [OSTI]

CHAPTER 29 Quantitative Characterization of Filament Dynamics by Single-Molecule Lifetime. Single-Molecule Lifetime Measurements A. Extract and Sample Preparation B. Microscopy C. Data Analysis Dynamics C. Connecting to Other Types of Measurements IV. Results and Conclusion References Abstract Single-molecule

Needleman, Daniel

268

Evidence for production of single top quarks  

Science Journals Connector (OSTI)

We present first evidence for the production of single top quarks in the D0 detector at the Fermilab Tevatron pp¯ collider. The standard model predicts that the electroweak interaction can produce a top quark together with an antibottom quark or light quark, without the antiparticle top-quark partner that is always produced from strong-coupling processes. Top quarks were first observed in pair production in 1995, and since then, single top-quark production has been searched for in ever larger data sets. In this analysis, we select events from a 0.9??fb-1 data set that have an electron or muon and missing transverse energy from the decay of a W boson from the top-quark decay, and two, three, or four jets, with one or two of the jets identified as originating from a b hadron decay. The selected events are mostly backgrounds such as W+jets and tt¯ events, which we separate from the expected signals using three multivariate analysis techniques: boosted decision trees, Bayesian neural networks, and matrix-element calculations. A binned likelihood fit of the signal cross section plus background to the data from the combination of the results from the three analysis methods gives a cross section for single top-quark production of ?(pp¯?tb+X,tqb+X)=4.7±1.3??pb. The probability to measure a cross section at this value or higher in the absence of signal is 0.014%, corresponding to a 3.6 standard deviation significance. The measured cross section value is compatible at the 10% level with the standard model prediction for electroweak top-quark production. We use the cross section measurement to directly determine the Cabibbo-Kobayashi-Maskawa quark mixing matrix element that describes the Wtb coupling and find |Vtbf1L|=1.31-0.21+0.25, where f1L is a generic vector coupling. This model-independent measurement translates into 0.68<|Vtb|?1 at the 95% C.L. in the standard model.

V. M. Abazov et al. (The D0 Collaboration)

2008-07-14T23:59:59.000Z

269

Unusual Structure and Magnetism in MnO Nanoclusters  

E-Print Network [OSTI]

We report an unusual evolution of structure and magnetism in stoichiometric MnO clusters based on an extensive and unbiased search through the potential energy surface within density functional theory. The smaller clusters, containing up to five MnO units, adopt two-dimensional structures; and regardless of the size of the cluster, magnetic coupling is found to be antiferromagnetic in contrast to previous theoretical findings. Predicted structure and magnetism are strikingly different from the magnetic core of Mn-based molecular magnets, whereas they were previously argued to be similar. Both of these features are explained through the inherent electronic structures of the clusters.

Ganguly, Shreemoyee; Sanyal, Biplab; Mookerjee, Abhijit; 10.1103/PhysRevB.83.020411

2011-01-01T23:59:59.000Z

270

Unusual structure and magnetism in manganese oxide nanoclusters  

E-Print Network [OSTI]

We report an unusual evolution of structure and magnetism in stoichiometric MnO clusters based on an extensive and unbiased search through the potential-energy surface within density functional theory. The smaller clusters, ...

Ganguly, Shreemoyee

271

Pt NANOCLUSTERS ON CARBON NANOMATERIALS FOR HYDROGEN FUEL CELLS  

Science Journals Connector (OSTI)

The detailed study of carbon nanomaterials constitution with allowance for of reduction conversions Pt (II, IV) allows to realize directional looking up of methods of preparation of platinum catalysts for redo...

N.S. KUYUNKO; S.D. KUSHCH; V.E. MURADYAN…

2007-01-01T23:59:59.000Z

272

Ferromagnetic Semiconductor Nanoclusters: Co-doped Cu2O. | EMSL  

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

D Meyer DE McCready MH Engelhard Capabilities: Spectroscopy and Diffraction NMR and EPR Facility: Radiochemistry Annex Science Theme: Energy Materials & Processes Biosystem...

273

Dissecting Single-Molecule Signal Transduction in Carbon Nanotube Circuits with Protein Engineering  

E-Print Network [OSTI]

Dissecting Single-Molecule Signal Transduction in Carbon Nanotube Circuits with Protein Engineering Supporting Information ABSTRACT: Single-molecule experimental methods have provided new insights measurements. A novel, non uorescent single-molecule technique involves attaching single molecules to single

Weiss, Gregory A.

274

Fabrication of single crystalline, uniaxial single domain Co nanowire arrays with high coercivity  

SciTech Connect (OSTI)

Whilst Co nanorods with high coercivity were synthesized during recent years, they did not achieve the same results as for Co nanowires embedded in solid templates. In the present work, Co nanowire arrays (NWAs) with high coercivity were successfully fabricated in porous aluminum oxide template under optimum conditions by using pulsed ac electrodeposition technique. Magnetic properties and crystalline characteristics of the nanowires were investigated by hysteresis loop measurements, first-order reversal curve (FORC) analysis, X-ray diffraction (XRD), and selected area electron diffraction (SAED) patterns. Hysteresis loop measurements showed high coercivity of about 4.8 kOe at room temperature together with optimum squareness of 1, resulting in an increase of the previous maximum coercivity for Co NWAs up to 45%. XRD and SAED patterns revealed a single crystalline texture along the [0002] direction, indicating the large magnetocrystalline anisotropy. On the other hand, FORC analysis confirmed a single domain structure for the Co NWAs. In addition, the reversal mechanism of the single crystalline, single domain Co NWAs was studied which resulted in the fixed easy axis with a coherent rotation. Accordingly, these nanowires might offer promising applications in high density bit patterned media and low power logic devices.

Ramazani, A., E-mail: rmzn@kashanu.ac.ir; Almasi Kashi, M. [Department of Physics, University of Kashan, Kashan 87317-51167 (Iran, Islamic Republic of); Institute of Nanoscience and Nanotechnology, University of Kashan, Kashan 87317-51167 (Iran, Islamic Republic of); Montazer, A. H. [Institute of Nanoscience and Nanotechnology, University of Kashan, Kashan 87317-51167 (Iran, Islamic Republic of)

2014-03-21T23:59:59.000Z

275

The single electron chemistry of coals  

SciTech Connect (OSTI)

Our work on single election transfer in coals led us to the knowledge that the energetics of bond cleavage in radical cations is 20-40 kcal/mole lower than the corresponding homolytic bond cleavage energies. Having made excellent progress in the other areas covered by this proposal, we are extending our studies to the investigation of the formation and cleavage reaction of radical cations in coals. The formation of a radical cation requires the transfer of an electron from a neutral molecule to an appropriate electron acceptor (oxidant). As a first step, we seek oxidants which will form radical cations from functional groups typical of those in coals. We must also study the decomposition behavior of bonds typical of those found in coals. Alkyl and alkoxy aromatic compounds were chosen as the electron donors because of their common occurrence in coals.

Larsen, J.W.; Kaushal, P.

1991-01-18T23:59:59.000Z

276

The temperatures of single?bubble sonoluminescence  

Science Journals Connector (OSTI)

We observe extraordinarily intense single?bubble sonoluminescence (SBSL) from concentrated sulfuric acid (H2SO4) containing noble gases. Strong atomic Ar emission and extensive vibronic progressions from sulfur monoxide (SO) are also present in the SBSL spectra. The Ar atom excited states observed are too high in energy to be thermally populated and must be excited by high energy particle impact consistent with Ar atom SBSL from an emissive shell surrounding an optically opaque plasma core just as in a star or thermonuclear explosion. From relative intensities of Ar lines we find that the observed effective emission temperature during SBSL is 15200±1900?K. SBSL emission temperatures can be systematically controlled over the range from ?1500 to ?20000?K by changing the applied acoustic pressure or the thermal conductivity of the dissolved gas.

2004-01-01T23:59:59.000Z

277

Magnetoplasticity and diffusion in silicon single crystals  

SciTech Connect (OSTI)

The effect of static magnetic fields on the dynamics of surface dislocation segments, as well as the diffusion mobility of a dopant in silicon single crystals, has been analyzed. It has been experimentally found that the preliminary treatment of p-type silicon plates (the dopant is boron with a concentration of 10{sup 16} cm{sup -3}) in the static magnetic field (B = 1 T, a treatment time of 30 min) leads to an increase in the mobility of surface dislocation segments. The characteristic times of observed changes (about 80 h) and the threshold dopant concentration (10{sub 15} cm{sup -3}) below which the magneto-optical effect in silicon is not fixed have been determined. It has been found that diffusion processes in dislocation-free silicon are magnetically sensitive: the phosphorus diffusion depth in p-type silicon that is preliminarily aged in the static magnetic field increases (by approximately 20%) compared to the reference samples.

Skvortsov, A. A., E-mail: SkvortsovAA2009@yandex.ru; Karizin, A. V. [Moscow State Technical University 'MAMI' (Russian Federation)

2012-01-15T23:59:59.000Z

278

Single molecule tracking of heterogeneous diffusion  

Science Journals Connector (OSTI)

The mean square displacement of heterogeneous diffusion obeys the Einstein relation, thereby showing no sign of heterogeneities in the ensemble measurement of the diffusion constant. The signature of spatial heterogeneities appears in the time evolution of the non-Gaussian distribution and in the cross correlation between the square displacements at different times, both available from single molecule diffusional trajectories. As a quantitative measure, the non-Gaussian indicator g(t) decays asymptotically to zero according to 1/t for finite time correlation, but saturates at a plateau value for power-law correlation. In addition, the joint moment correlation function f(t,?) provides a direct probe of the memory effect of the fluctuating rate constant. A two-state diffusion model and a stochastic Gaussian model are constructed to evaluate these quantities and are shown to yield the same result within the second cumulant expansion.

Jianshu Cao

2001-03-16T23:59:59.000Z

279

Single-Molecule Solvation-Shell Sensing  

Science Journals Connector (OSTI)

We present a new route to single-molecule sensing via solvation shells surrounding a current-carrying backbone molecule. As an example, we show that the presence of a water solvation shell “gates” the conductance of a family of oligothiophene-containing molecular wires, and that the longer the oligothiophene, the larger is the effect. For the longest example studied, the molecular conductance is over 2 orders of magnitude larger in the presence of a shell comprising just 10 water molecules. A first principles theoretical investigation of electron transport through the molecules, using the nonequilibrium Green’s function method, shows that water molecules interact directly with the thiophene rings, significantly shifting transport resonances and greatly increasing the conductance. This reversible effect is confirmed experimentally through conductance measurements performed in the presence of moist air and dry argon.

E. Leary; H. Höbenreich; S. J. Higgins; H. van Zalinge; W. Haiss; R. J. Nichols; C. M. Finch; I. Grace; C. J. Lambert; R. McGrath; J. Smerdon

2009-02-23T23:59:59.000Z

280

Directed Assembly of Single-Molecule and Single-Chain Magnets: From Mononuclear High-Spin Iron(II) Complexes to Cyano-Bridged Chain Compounds  

E-Print Network [OSTI]

new cyano-bridged single-molecule and single-chain magnetsand have come to be known as single- molecule magnets. Thisin part because single- molecule magnets could potentially

Harris, Thomas

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "nanoclusters out-perform single" from the National Library of EnergyBeta (NLEBeta).
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281

Efficient generation of near infra-red single photons from the zero-phonon line of a single molecule  

E-Print Network [OSTI]

@u-bordeaux1.fr Abstract: Using the zero-phonon line (ZPL) emission of a single molecule, we realized immersion lens is used to image single molecules with an optical resolution of 300 nm (~0.4) and a high on controlled single molecule fluorescence", Phys. Rev. Lett. 83, 2722-2725 (1999). 4. B. Lounis, and W. E

Paris-Sud XI, Université de

282

Solar cell structure incorporating a novel single crystal silicon material  

DOE Patents [OSTI]

A novel hydrogen rich single crystal silicon material having a band gap energy greater than 1.1 eV can be fabricated by forming an amorphous region of graded crystallinity in a body of single crystalline silicon and thereafter contacting the region with atomic hydrogen followed by pulsed laser annealing at a sufficient power and for a sufficient duration to recrystallize the region into single crystal silicon without out-gassing the hydrogen. The new material can be used to fabricate semiconductor devices such as single crystal silicon solar cells with surface window regions having a greater band gap energy than that of single crystal silicon without hydrogen.

Pankove, Jacques I. (Princeton, NJ); Wu, Chung P. (Trenton, NJ)

1983-01-01T23:59:59.000Z

283

Best Management Practice: Single-Pass Cooling Equipment | Department of  

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

Single-Pass Cooling Equipment Single-Pass Cooling Equipment Best Management Practice: Single-Pass Cooling Equipment October 8, 2013 - 9:37am Addthis Single-pass or once-through cooling systems provide an opportunity for significant water savings. In these systems, water is circulated once through a piece of equipment and is then disposed down the drain. Types of equipment that typically use single-pass cooling include CAT scanners, degreasers, hydraulic equipment, condensers, air compressors, welding machines, vacuum pumps, ice machines, x-ray equipment, and air conditioners. To remove the same heat load, single-pass systems use 40 times more water than a cooling tower operated at five cycles of concentration. To maximize water savings, single-pass cooling equipment should be either modified to

284

PHASE I SINGLE CELL ELECTROLYZER TEST RESULTS  

SciTech Connect (OSTI)

This document reports the results of Phase I Single Cell testing of an SO{sub 2}-Depolarized Water Electrolyzer. Testing was performed primarily during the first quarter of FY 2008 at the Savannah River National Laboratory (SRNL) using an electrolyzer cell designed and built at SRNL. Other facility hardware were also designed and built at SRNL. This test further advances this technology for which work began at SRNL in 2005. This research is valuable in achieving the ultimate goal of an economical hydrogen production process based on the Hybrid Sulfur (HyS) Cycle. The focus of this work was to conduct single cell electrolyzer tests to further develop the technology of SO{sub 2}-depolarized electrolysis as part of the HyS Cycle. The HyS Cycle is a hybrid thermochemical cycle that may be used in conjunction with advanced nuclear reactors or centralized solar receivers to produce hydrogen by water-splitting. Like all other sulfur-based cycles, HyS utilizes the high temperature thermal decomposition of sulfuric acid to produce oxygen and regenerate sulfur dioxide. The unique aspect of HyS is the generation of hydrogen in a water electrolyzer that is operated under conditions where dissolved sulfur dioxide depolarizes the anodic reaction, resulting in substantial voltage reduction. Low cell voltage is essential for both thermodynamic efficiency and hydrogen cost. Sulfur dioxide is oxidized at the anode, producing sulfuric acid that is sent to the high temperature acid decomposition portion of the cycle. The electrolyzer cell uses the membrane electrode assembly (MEA) concept. The anode and cathode are formed by spraying platinum containing catalyst on both sides of a Proton Exchange Membrane (PEM). In most testing the material of the PEM was NafionR. The electrolyzer cell active area can be as large as 54.8 cm{sup 2}. Feed to the anode of the electrolyzer is a sulfuric acid solution containing sulfur dioxide. The partial pressure of sulfur dioxide could be varied in the range of 1 to 6 atm (15 to 90 psia). Temperatures could be controlled in the range from ambient to 80 C. Hydrogen generated at the cathode of the cell was collected for the purpose of flow measurement and composition analysis. The test facility proved to be easy to operate, versatile, and reliable.

Steimke, J; Timothy Steeper, T

2008-08-05T23:59:59.000Z

285

Single-shot and single-spot measurement of laser ablation threshold for carbon nanotubes  

E-Print Network [OSTI]

A simple and convenient procedure for single-shot, single-spot ablation threshold measurement has been developed. It is based on the employment of cylindrical lens to obtain elliptical Gaussian laser spot. The ablated spot chords which are parallel to the minor axis were measured across the spot major axis which is proportional to the fluence cross-section thus providing wide range dependence of damaged spot size versus fluence in one spot measurement. For both conventional and new-developed procedures the ablation threshold for typical Nd:YAG laser parameters (1064 nm, 10 ns) has been measured as 50 mJ/cm2 which is one order of magnitude lower than that for a bulk graphite.

Lednev, Vasily N; Obraztsova, Elena D; Kudryashov, Sergey I; Bunkin, Alexey F

2013-01-01T23:59:59.000Z

286

Quantum, Photo-Electric Single Capacitor Paradox  

E-Print Network [OSTI]

In this work single capacitor paradox (a variation of the remarkable two capacitor paradox) is considered in a new, quantum discrete form. Simply speaking we consider well-known usual, photoelectric effect experimental device, i.e. photo electric cell, where cathode and anode are equivalently charged but non-connected. It, obviously, represents a capacitor that initially, i.e. before action of the photons with individual energy equivalent to work function, holds corresponding energy of the electrical fields between cathode and anode. Further, we direct quantum discretely photons, one by one, toward cathode where according to photo-electrical effect electrons discretely, one by one, will be emitted and directed toward anode. It causes discrete discharge of the cell, i.e. capacitor and discrete decrease of the electrical field. Finally, total discharge of the cell, i.e. capacitor, and total disappearance of the electrical field and its energy will occur. Given, seemingly paradoxical, capacitor total energy loss can be simply explained without any dissipative effects (Joule heating or electromagnetic waves emission can be neglected as high order small corrections) by work done by the electrical field by movement of the electrons from cathode to anode. (Remarkable two capacitors paradox can be, obviously, formulated and explained in the completely analogous way.)

Darko Kapor; Vladan Pankovic

2009-12-10T23:59:59.000Z

287

Single molecule pulling with large time steps  

Science Journals Connector (OSTI)

Recently, we presented a generalization of the Jarzynski nonequilibrium work theorem for phase space mappings. The formalism shows that one can determine free energy differences from approximate trajectories obtained from molecular dynamics simulations in which very large time steps are used. In this work we test the method by simulating the force-induced unfolding of a deca-alanine helix in vacuum. The excellent agreement between results obtained with a small, conservative time step of 0.5fs and results obtained with a time step of 3.2fs (i.e., close to the stability limit) indicates that the large-time-step approach is practical for such complex biomolecules. We further adapt the method of Hummer and Szabo for the simulation of single molecule force spectroscopy experiments to the large-time-step method. While trajectories generated with large steps are approximate and may be unphysical—in the simulations presented here we observe a violation of the equipartition theorem—the computed free energies are exact in principle. In terms of efficiency, the optimum time step for the unfolding simulations lies in the range 1–3fs.

Harald Oberhofer; Christoph Dellago; Stefan Boresch

2007-06-06T23:59:59.000Z

288

Single molecule detection using charge-coupled device array technology  

SciTech Connect (OSTI)

A technique for the detection of single fluorescent chromophores in a flowing stream is under development. This capability is an integral facet of a rapid DNA sequencing scheme currently being developed by Los Alamos National Laboratory. In previous investigations, the detection sensitivity was limited by the background Raman emission from the water solvent. A detection scheme based on a novel mode of operating a Charge-Coupled Device (CCD) is being developed which should greatly enhance the discrimination between fluorescence from a single molecule and the background Raman scattering from the solvent. Register shifts between rows in the CCD are synchronized with the sample flow velocity so that fluorescence from a single molecule is collected in a single moving charge packet occupying an area approaching that of a single pixel while the background is spread evenly among a large number of pixels. Feasibility calculations indicate that single molecule detection should be achieved with an excellent signal-to-noise ratio.

Denton, M.B.

1992-07-29T23:59:59.000Z

289

Clinical experience with a multifunctional, flexible surgery system for endolumenal, single-port, and NOTES procedures  

E-Print Network [OSTI]

for endolumenal, single-port, and NOTES procedures SantiagoAbstract Background Single-port and incisionless surgicalendolumenal, single-port, transvaginal, or transgastric)

2011-01-01T23:59:59.000Z

290

Single molecule studies of bacterial transcription under Force and Torque using Optical Tweezers  

E-Print Network [OSTI]

Single molecule studies of RNAP as a molecularcheck) . . . . . . . . 119 A.5 Single Molecule TraditionalWang, M.D. (2002) Single molecule analysis of RNA polymerase

Mejia, Yara Xochitl

2009-01-01T23:59:59.000Z

291

Single-molecule observations of neck linker conformational changes in the kinesin motor protein  

E-Print Network [OSTI]

of myosin V by single-molecule fluorescence polarization.Figure Legends Figure 1 Single molecule FRET measurements ofrepresents a different single molecule. Transitions were

Tomishige, M; Stuurman, N; Vale, R

2006-01-01T23:59:59.000Z

292

Retention of transcription initiation factor sigma(70) in transcription elongation: Single-molecule analysis  

E-Print Network [OSTI]

laser excitation of single molecules. Proc Natl Acad Sci U Sdetection by single-molecule DNA nanomanipulation. Proc Natl1991). Transcription by single molecules of RNA-polymerase

2005-01-01T23:59:59.000Z

293

Single Molecule Dynamics of Lysozyme Processing Distinguishes Linear and Cross-linked Peptidoglycan Substrates  

E-Print Network [OSTI]

pubs.acs.org/JACS Single-Molecule Dynamics of Lysozymepeptidoglycan substrates. Single-molecule monitoring wasdinates. 3?5 However, single-molecule studies, typically

Collins, Philip G

2012-01-01T23:59:59.000Z

294

Single-molecule dynamics of phytochrome-bound fluorophores probed by fluorescence correlation spectroscopy  

E-Print Network [OSTI]

Biophysics TITLE: Single molecule dynamics of phytochrome-1 (Cph1?). Single molecule diffusion measurements showedproperties at the single molecule level, making it an

2006-01-01T23:59:59.000Z

295

Nonlinear Dynamics of Single Bunch Instability  

SciTech Connect (OSTI)

A nonlinear equation is derived that governs the evolution of the amplitude of unstable oscillations with account of quantum diffusion effects due to the synchrotron radiation. Numerical solutions to this equation predict a variety of possible scenarios of nonlinear evolution of the instability some of which are in good qualitative agreement with experimental observations. Microwave single bunch instability in circular accelerators has been observed in many machines. The instability usually arises when the number of particles in the bunch exceeds some critical value, Nc, which varies depending on the parameters of the accelerating regime. Recent observations on the SLC damping rings at SLAC with a new low-impedance vacuum chamber revealed new interesting features of the instability. In some cases, after initial exponential growth, the instability eventually saturated at a level that remained constant through the accumulation cycle. In other regimes, relaxation-type oscillations were measured in nonlinear phase of the instability. In many cases, the instability was characterized by a frequency close to the second harmonic of the synchrotron oscillations. Several attempts have been made to address the nonlinear stage of the instability based on either computer simulations or some specific assumptions regarding the structure of the unstable mode. An attempt of a more general consideration of the problem is carried out in this paper. We adopt an approach recently developed in plasma physics for analysis of nonlinear behavior of weakly unstable modes in dynamic systems. Assuming that the growth rate of the instability is much smaller than its frequency, we find a time dependent solution to Vlasov equation and derive an equation for the complex amplitude of the oscillations valid in the nonlinear regime. Numerical solutions to this equation predict a variety of possible scenarios of nonlinear evolution of the instability some of which are in good qualitative agreement with experimental observations.

Stupakov, G.V.; /SLAC; Breizman, B.N.; Pekker, M.S.; /Texas U.

2011-09-09T23:59:59.000Z

296

Single-Molecule Rupture Dynamics on Multidimensional Landscapes  

Science Journals Connector (OSTI)

We explore emergent effects of multidimensionality of the free energy landscape on single-molecule kinetics under constant force. The proposed minimal model reveals the existence of a spectrum of unusual scenarios for the force-dependent lifetime, all of which are shown to occur on a free energy landscape with a single transition state. We present an analytical solution that governs single-molecule responses to a constant force and relates them to microscopic parameters of the system.

Yohichi Suzuki and Olga K. Dudko

2010-01-25T23:59:59.000Z

297

Analysis of mixed integer programming formulations for single ...  

E-Print Network [OSTI]

four different paradigms for single machine scheduling problems (SMSP) with se- ...... Automatic Control, IEEE Transactions on 38(7):1066–1079. Luh P, Gou L, ...

2014-07-15T23:59:59.000Z

298

Optimised quantum hacking of superconducting nanowire single-photon detectors  

Science Journals Connector (OSTI)

We explore bright-light control of superconducting nanowire single-photon detectors (SNSPDs) in the shunted configuration (a practical measure to avoid latching). In an experiment, we...

Tanner, Michael G; Makarov, Vadim; Hadfield, Robert H

2014-01-01T23:59:59.000Z

299

Single-Molecule Dynamics Reveals Cooperative Binding-Folding...  

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

Molecule Dynamics Reveals Cooperative Binding-Folding in Protein Recognition . Single-Molecule Dynamics Reveals Cooperative Binding-Folding in Protein Recognition . Abstract: The...

300

Optimization Online - Lower Bounding Procedures for the Single ...  

E-Print Network [OSTI]

Nov 30, 2014 ... Lower Bounding Procedures for the Single Allocation Hub Location Problem. Borzou Rostami(brostami ***at*** mathematik.tu-dortmund.de)

Borzou Rostami

2014-11-30T23:59:59.000Z

Note: This page contains sample records for the topic "nanoclusters out-perform single" 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

Self-assembling functionalized single-walled carbon nanotubes  

E-Print Network [OSTI]

scale synthesis of carbon nanotubes." Nature, Vol.358, 220-Ropes of Metallic Carbon Nanotubes." Science, Vol.273(5274),of single- wall carbon nanotubes. Process, product, and

Gao, Yan

2011-01-01T23:59:59.000Z

302

Los Alamos scientists detect and track single molecules with...  

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

Nanotube "glowsticks" transform surface science tool kit Los Alamos scientists detect and track single molecules with nanoscale carbon cylinders Researchers have now shown that...

303

Nuclear magnetic resonance in a thallium single crystal.  

E-Print Network [OSTI]

??Nuclear magnetic resonance studies in single crystals of thallium have been performed for the first time. The resonance frequency, line width and second moment were… (more)

Schratter, Jacob Jack

2012-01-01T23:59:59.000Z

304

Single-Machine Two-Agent Scheduling Problems with ...  

E-Print Network [OSTI]

Jan 24, 2014 ... Abstract: We address a class of deterministic scheduling problems in which two agents compete for the usage of a single machine. The agents ...

Gaia Nicosia

2014-01-24T23:59:59.000Z

305

A hybrid Lagrangean metaheuristic for single machine scheduling ...  

E-Print Network [OSTI]

Aug 8, 2014 ... A hybrid Lagrangean metaheuristic for single machine scheduling problem with sequence-dependent setup times and due dates.

Thiago Henrique Nogueira

2014-08-08T23:59:59.000Z

306

A Method for Evaluating Fire After Earthquake Scenarios for Single...  

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

Evaluating Fire After Earthquake Scenarios for Single Buildings Authors: Elizabeth J. Kelly and Raymond N. Tell Intended Use: Handout for DOE Natural Phenomena Hazards Workshop,...

307

A Method for Evaluating Fire after Earthquake Scenarios for Single...  

Office of Environmental Management (EM)

Method for Evaluating Fire After Earthquake Scenarios for Single Buildings Elizabeth J. Kelly and Raymond N. Tell, LANL U.S. Department of Energy Natural Phenomena Hazards Workshop...

308

A Method for Evaluating Fire After Earthquake Scenarios for Single...  

Office of Environmental Management (EM)

Method for Evaluating Fire After Earthquake Scenarios for Single Buildings Elizabeth J. Kelly and Raymond N. Tell, LANL U.S. Department of Energy Natural Phenomena Hazards Workshop...

309

A Single Multi-Functional Enzyme for Efficient Biomass Conversion...  

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

Biomass and Biofuels Biomass and Biofuels Find More Like This Return to Search A Single Multi-Functional Enzyme for Efficient Biomass Conversion National Renewable Energy...

310

Manipulating transport through a single-molecule junction  

SciTech Connect (OSTI)

Molecular Electronics deals with the realization of elementary electronic devices that rely on a single molecule. For electronic applications, the most important property of a single molecule is its conductance. Here we show how the conductance of a single octanethiol molecule can be measured and manipulated by varying the contact's interspace. This mechanical gating of the single molecule junction leads to a variation of the conductance that can be understood in terms of a tunable image charge effect. The image charge effect increases with a decrease of the contact's interspace due to a reduction of the effective potential barrier height of 1.5 meV/pm.

Sotthewes, Kai; Heimbuch, René; Zandvliet, Harold J. W. [Physics of Interfaces and Nanomaterials, MESA Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500AE Enschede (Netherlands)] [Physics of Interfaces and Nanomaterials, MESA Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500AE Enschede (Netherlands)

2013-12-07T23:59:59.000Z

311

Method for producing labeled single-stranded nucleic acid probes  

DOE Patents [OSTI]

Disclosed is a method for the introduction of unidirectional deletions in a cloned DNA segment. More specifically, the method comprises providing a recombinant DNA construct comprising a DNA segment of interest inserted in a cloning vector, the cloning vector having an f1 endonuclease recognition sequence adjacent to the insertion site of the DNA segment of interest. The recombinant DNA construct is then contacted with the protein pII encoded by gene II of phage f1 thereby generating a single-stranded nick. The nicked DNA is then contacted with E. coli Exonuclease III thereby expanding the single-stranded nick into a single-stranded gap. The single-stranded gapped DNA is then contacted with a single-strand-specific endonuclease thereby producing a linearized DNA molecule containing a double-stranded deletion corresponding in size to the single-stranded gap. The DNA treated in this manner is then incubated with DNA ligase under conditions appropriate for ligation. Also disclosed is a method for producing single-stranded DNA probes. In this embodiment, single-stranded gapped DNA, produced as described above, is contacted with a DNA polymerase in the presence of labeled nucleotides to fill in the gap. This DNA is then linearized by digestion with a restriction enzyme which cuts outside the DNA segment of interest. The product of this digestion is then denatured to produce a labeled single-stranded nucleic acid probe.

Dunn, John J. (Bellport, NY); Quesada, Mark A. (Middle Island, NY); Randesi, Matthew (Upton, NY)

1999-10-19T23:59:59.000Z

312

Electromagnetic Interference (EMI) Shielding of Single-Walled Carbon  

E-Print Network [OSTI]

Electromagnetic Interference (EMI) Shielding of Single-Walled Carbon Nanotube Epoxy Composites Ning (SWNT)-polymer composites have been fabricated to evaluate the electromagnetic interference (EMI

Gao, Hongjun

313

Standard Work Specifications for Single-Family Home Energy Upgrades...  

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

for Single-Family Home Energy Upgrades to define the minimum requirements for high-quality residential energy upgrades. Today, the Standard Work Specifications provide a...

314

Gas-Phase Synthesis of Singly and Multiply Charged Polyoxovanadate...  

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

oxide clusters for subsequent investigations of structure and reactivity. Citation: Al Hasan NM, GE Johnson, and J Laskin.2013."Gas-Phase Synthesis of Singly and Multiply Charged...

315

Self-assembling functionalized single-walled carbon nanotubes  

E-Print Network [OSTI]

Single-walled carbon nanotubes Carbon nanotubes (CNTs) arescale synthesis of carbon nanotubes." Nature, Vol.358, 220-Ropes of Metallic Carbon Nanotubes." Science, Vol.273(5274),

Gao, Yan

2011-01-01T23:59:59.000Z

316

Single-molecule orientation measurements with a quadrated pupil  

Science Journals Connector (OSTI)

This Letter presents a means of measuring the dipole orientation of a fluorescent, orientationally fixed single molecule, which uses a specially designed phase mask, termed a...

Backer, Adam S; Backlund, Mikael P; Lew, Matthew D; Moerner, W E

2013-01-01T23:59:59.000Z

317

Electronic transport and correlations in single magnetic molecule devices.  

E-Print Network [OSTI]

??In this dissertation, we study the most important microscopic aspects that grant molecules such as Single Molecule Magnets (SMMs) their preferential spin direction. We do… (more)

Romero, Javier

2014-01-01T23:59:59.000Z

318

Single-Molecule Biophysical Imaging, Nanophotonics and Trapping  

Science Journals Connector (OSTI)

Single-molecule fluorescence imaging provides a powerful tool to explore individual biophysical systems, even in cells. Metallic nanoantennas improve the interaction between light and...

Moerner, W E

319

Iron Speciation and Mixing in Single Aerosol Particles from the...  

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

the global carbon budget and climate. Particles collected on Okinawa Island during an atmospheric pollution transport event from China were analyzed using complementary single...

320

Efficient generation of near infra-red single photons from the zero-phonon line of a single molecule  

E-Print Network [OSTI]

Using the zero-phonon line (ZPL) emission of a single molecule, we realized a triggered source of near-infra-red (lambda=785 nm) single photons at a high repetition rate. A Weierstrass solid immersion lens is used to image single molecules with an optical resolution of 300 nm (~0.4*lambda) and a high collection efficiency. Because dephasing of the transition dipole due to phonons vanishes at liquid helium temperatures, our source is attractive for the efficient generation of single indistinguishable photons.

Jean-Baptiste Trebbia; Hartmut Ruf; Philippe Tamarat; Brahim Lounis

2010-11-29T23:59:59.000Z

Note: This page contains sample records for the topic "nanoclusters out-perform single" 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.
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to obtain the most current and comprehensive results.


321

Conductance-Controlled Point Functionalization of Single-Walled Carbon Nanotubes  

E-Print Network [OSTI]

of Single-Walled Carbon Nanotubes Brett R. Goldsmith, 1 Johnof Single-Walled Carbon Nanotubes Brett R. Goldsmith et al.single-walled carbon nanotubes (SWNTs) to fabricate single-

Collins, Philip G

2007-01-01T23:59:59.000Z

322

The Effects of Single Vacancy Defects and Lithium on Single-Walled Carbon Nanotubes Ross Kistler, Loyola University Maryland, 2011 SURF Fellow  

E-Print Network [OSTI]

The Effects of Single Vacancy Defects and Lithium on Single-Walled Carbon Nanotubes Ross Kistler with a single vacancy with a Li atom. Procedure First, DMol3 was used to create a simulation of a (5,5) SWCNT. A single C atom was removed from the structure, creating a defect known as a single vacancy. Geometric

Li, Mo

323

ORIGINAL ARTICLE Single ferroelectric-domain photovoltaic switch based  

E-Print Network [OSTI]

ORIGINAL ARTICLE Single ferroelectric-domain photovoltaic switch based on lateral BiFeO3 cells Ji serves as a basis for solid-state memory. This phenomenon can also yield an interesting photovoltaic imposed by the ferroelectric polarization vectors. Here, we demonstrate a single-domain photovoltaic

Jo, Moon-Ho

324

''Bare'' single-particle energies in Ni-56  

E-Print Network [OSTI]

The structure of the low-lying levels in the mirror nuclei Ni-57 and Cu-57 is described within the extended unified model. The problem of single-particle energies in Ni-56 is treated in detail. ''Bare'' single-particle energies are extracted from...

Trache, L.; Kolomiets, A.; Shlomo, S.; Heyde, K.; Dejbakhsh, H.; Gagliardi, Carl A.; Tribble, Robert E.; Zhou, XG; Jacob, VE; Oros, AM.

1996-01-01T23:59:59.000Z

325

Single element changes in electrical networks Thomas Berger,  

E-Print Network [OSTI]

University of Technology Page 2 / 13 #12;Example: electrical RLC network Z(s)i(s) = vs(s), Z(s) = s-1 1 C1Single element changes in electrical networks Thomas Berger, George Halikias and Nicos Karcanias, 2012 Single element changes in electrical networks Thomas Berger, George Halikias and Nicos Karcanias

Knobloch,Jürgen

326

ATP Hydrolysis Stimulates Large Length Fluctuations in Single Actin Filaments  

E-Print Network [OSTI]

ATP Hydrolysis Stimulates Large Length Fluctuations in Single Actin Filaments Evgeny B. Stukalin is investigated theoretically using a stochastic model that takes into account the hydrolysis of ATP filaments. It is found that the ATP hydrolysis has a strong effect on dynamic properties of single actin

327

Absorption spectroscopy of individual single-walled carbon nanotubes  

E-Print Network [OSTI]

Absorption spectroscopy of individual single-walled carbon nanotubes Stéphane Berciaud,a Laurent-walled carbon nanotubes (SWNTs) lead to heterogeneous samples containing mixtures of metallic and semiconducting species with a variety of lengths and defects. Optical detection at the single nanotube level should thus

Boyer, Edmond

328

Manipulation and Imaging of Individual Single-Walled Carbon Nanotubes  

E-Print Network [OSTI]

Manipulation and Imaging of Individual Single-Walled Carbon Nanotubes with an Atomic Force Microscope** By Henk W. C. Postma, Allard Sellmeijer, and Cees Dekker* Carbon nanotubes[1] have attracted-walled nanotubes,[3±5] the prototype single-walled tubes are much more difficult to study since their diameter

329

Simulations of nanosensors based on single walled carbon nanotubes  

E-Print Network [OSTI]

Simulations of nanosensors based on single walled carbon nanotubes Polina Pine1, Yuval E. Yaish2. The potential of single-walled carbon nanotubes as mass sensors is examined. The change in mass leads to proportional changes in the nanotube vibrational frequencies, which are monitored during atomistic simulations

Adler, Joan

330

Characterization of single wall carbon nanotubes by nonane preadsorption  

E-Print Network [OSTI]

energy for nitrogen adsorbed in nanotubes at zero coverage within the range of 12­18 kJ/mol. This bindingCharacterization of single wall carbon nanotubes by nonane preadsorption Oleg Byl a , Jie Liu b The preferential blocking of the interior adsorption sites of single walled carbon nanotubes (SWNTs) by n

Liu, Jie

331

Electrical Transport in Single-Wall Carbon Nanotubes  

E-Print Network [OSTI]

. (a) Schematic view a nanotube field-effect transistor (b) The Dirac energy dispersion coneElectrical Transport in Single-Wall Carbon Nanotubes Michael J. Biercuk1,3 , Shahal Ilani2 metal and semiconducting single-wall carbon nanotubes. The fundamental scattering mechanisms governing

McEuen, Paul L.

332

Raman Measurements on Electrochemically Doped Single-Walled Carbon Nanotubes  

E-Print Network [OSTI]

Raman Measurements on Electrochemically Doped Single-Walled Carbon Nanotubes P. M. Rafailov, M and studied the Raman response of electro- chemically doped single-walled carbon nanotubes (SWNT) using different salt solutions. The fre- quency shift of the radial breathing mode (RBM) and the high-energy mode

Nabben, Reinhard

333

A Cascade Multilevel Inverter Using a Single DC Source  

E-Print Network [OSTI]

A Cascade Multilevel Inverter Using a Single DC Source Zhong Du1, Leon M. Tolbert2 3, John N inverter can be implemented using only a single DC power source and capacitors. A standard cascade multilevel inverter requires DC sources for 2 + 1 levels. Without requiring transformers, the scheme proposed

Tolbert, Leon M.

334

Modeling genome coverage in single-cell sequencing  

Science Journals Connector (OSTI)

......1292-1294. Evrony GD , et al. Single-neuron sequencing analysis of L1 retrotransposition and somatic mutation in the human brain. Cell (2012) 151:483-496. Geigl JB , et al. Identification of small gains and losses in single cells after whole genome......

Timothy Daley; Andrew D. Smith

2014-11-15T23:59:59.000Z

335

Single-Cycle Plain-Woven Objects , Ergun Akleman2  

E-Print Network [OSTI]

Single-Cycle Plain-Woven Objects Qing Xing1 , Ergun Akleman2 , Jianer Chen3 , Jonathan L. Gross4 1 helical sense, then the EGRS induces a cyclic plain-weaving on the surface, which consists of cycles that it is always possible to create a single-cycle plain-weaving starting from a mesh on an arbitrary surface

Gross, Jonathan L.

336

Demonstration of Electrical Dispersion Compensation of Single Sideband Optical Transmission  

E-Print Network [OSTI]

Demonstration of Electrical Dispersion Compensation of Single Sideband Optical Transmission P. M describe a demonstration of electrical chromatic dispersion compensation of 10 Gb/s single sideband optical signals. Eye-opening and bit error rates of less than 10-10 were achieved after compensation of -2040 ps

Haddadi, Hamed

337

INTRODUCTION The granular mechanics of plastics within a single-  

E-Print Network [OSTI]

INTRODUCTION The granular mechanics of plastics within a single- screw extruder has, for the past are transported forward by the action of the extruder screw, assisted by the differ- ence in frictional forces and feed hopper of a single-screw extruder. The method considers each particle in a granular assem- bly

Thompson, Michael

338

Optical absorption intensity of semiconductor single-wall carbon nanotubes  

E-Print Network [OSTI]

Optical absorption intensity of semiconductor single-wall carbon nanotubes Y. Oyama1 , R. Saito1. The optical absorption intensity is inversely proportional to the diameter in the unit of per carbon atom of single-wall carbon nanotubes (SWNT) synthesized by alcohol CCVD (ACCVD) method and HiPco method [1

Maruyama, Shigeo

339

Modeling genome coverage in single-cell sequencing  

Science Journals Connector (OSTI)

......1292-1294. Evrony GD , et al. Single-neuron sequencing analysis of L1 retrotransposition and somatic mutation in the human brain. Cell (2012) 151:483-496. Geigl JB , et al. Identification of small gains and losses in single cells after whole genome......

Timothy Daley; Andrew D. Smith

2014-10-01T23:59:59.000Z

340

Mechanisms and modeling of single-event upset  

SciTech Connect (OSTI)

The basic mechanisms of single-event upset are reviewed, including charge collection in silicon junctions and transistors, and properties of single-event upset in CMOS static random access memory (SRAM) cells. The mechanisms are illustrated through the use of three-dimensional device and circuit simulations. Technology trends and implications for commercial devices are discussed.

Dodd, Paul E.

1998-10-12T23:59:59.000Z

Note: This page contains sample records for the topic "nanoclusters out-perform single" 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

Optical microcavity with semiconducting single-wall carbon nanotubes  

E-Print Network [OSTI]

Optical microcavity with semiconducting single- wall carbon nanotubes Etienne Gaufrès,1 Nicolas-Perot microcavities based on semiconducting single-wall carbon nanotubes with a quality factor of 160. We properties References and links 1. P. Avouris, M. Freitag and V. Perebeinos, "Carbon nanotube photonics

Paris-Sud XI, Université de

342

Biomolecular Recognition Based on Single Gold Nanoparticle Light  

E-Print Network [OSTI]

Biomolecular Recognition Based on Single Gold Nanoparticle Light Scattering G. Raschke,* S. Kowarik of a single gold nanoparticle functionalized with biotin. Addition of streptavidin and subsequent specific binding events alter the dielectric environment of the nanoparticle, resulting in a spectral shift

Peters, Achim

343

GENETIC ALGORITHMS FOR A SINGLE-TRACK VEHICLE AUTONOMOUS PILOT  

E-Print Network [OSTI]

GENETIC ALGORITHMS FOR A SINGLE-TRACK VEHICLE AUTONOMOUS PILOT Dana Vrajitoru Intelligent Systems algorithms to an autonomous pilot designed for motorized single-track vehicles (motorcycles). The pilot contribute efficiently to configuring the autonomous pilot. Key Words Genetic algorithms, multi

Vrajitoru, Dana

344

Multi-Sensor Single-Actuator Control of HVAC Systems  

E-Print Network [OSTI]

to replace the single sensor in one room with a network of sensors having at least one sensor per room. This paper addresses this multi-sensor, single-actuator control problem. We used computer simulations and optimization to study the problem. We designed a...

Lin, C.; Auslander, D.; Federspiel, C.

2002-01-01T23:59:59.000Z

345

Single-molecule Fluorescence Spectroelectrochemistry of Cresyl Violet  

SciTech Connect (OSTI)

We coupled scanning fluorescence microscopy with a potentiostat via a three-electrode electrochemical cell to enable single-molecule fluorescence spectroelectrochemistry of cresyl violet in aqueous solution, where the single-molecule fluorescence intensity of cresyl violet is modulated synchronously with the cyclic voltammetric potential scanning.

Lei, Chenghong; Hu, Dehong; Ackerman, Eric J.

2008-11-21T23:59:59.000Z

346

Single Molecule Tip Enhanced Raman Spectroscopy NSF Grant # 1121262  

E-Print Network [OSTI]

MRSEC Single Molecule Tip Enhanced Raman Spectroscopy NSF Grant # 1121262 Matthew D. Sonntag1, it can "see" one single molecule at a time, this was carried out by studying the vibrational signature fingerprint that allows molecule identification. J. Phys. Chem. C, 2012, 116 (1), pp 478­483 · R6G-d4 · R6G-d0

Shahriar, Selim

347

Self-Referenced Single-Electron Quantized Current Source  

Science Journals Connector (OSTI)

The future redefinition of the international system of units in terms of natural constants requires a robust, high-precision quantum standard for the electrical base unit ampere. However, the reliability of any single-electron current source generating a nominally quantized output current I=ef by delivering single electrons with charge e at a frequency f is eventually limited by the stochastic nature of the underlying quantum mechanical tunneling process. We experimentally explore a path to overcome this fundamental limitation by serially connecting clocked single-electron emitters with multiple in situ single-electron detectors. Correlation analysis of the detector signatures during current generation reveals erroneous pumping events and enables us to determine the deviation of the output current from the nominal quantized value ef. This demonstrates the concept of a self-referenced single-electron source for electrical quantum metrology.

Lukas Fricke; Michael Wulf; Bernd Kaestner; Frank Hohls; Philipp Mirovsky; Brigitte Mackrodt; Ralf Dolata; Thomas Weimann; Klaus Pierz; Uwe Siegner; Hans W. Schumacher

2014-06-06T23:59:59.000Z

348

Exploring Maximum Humidity Control and Energy Conservation Opportunities with Single Duct Single Zone Air-Handling Units  

E-Print Network [OSTI]

Humidity control for single-duct single-zone (SDSZ) constant volume air handling units is known to be a challenge. The operation of these systems is governed by space temperature only. Under mild weather conditions, discharge air temperature can get...

Zhou, J.; Wei, G.; Turner, W. D.; Deng, S.; Claridge, D.

2006-01-01T23:59:59.000Z

349

Single shot ultrafast dynamic ellipsometry (UDE) of laser-driven shocks in single crystal explosives  

SciTech Connect (OSTI)

We report on the first experiments to measure states in shocked energetic single crystals with dynamic ellipsometry. We demonstrate that these ellipsometric techniques can produce reasonable Hugoniot values using small amounts of crystalline RDX and PETN. Pressures, particle velocities and shock velocities obtained using shocked ellipsometry are comparable to those found using gas-gun flyer plates and molecular dynamics calculations. The adaptation of the technique from uniform thin films of polymers to thick non-perfect crystalline materials was a significant achievement. Correct sample preparation proved to be a crucial component. Through trial and error, we were able to resolve polishing issues, sample quality problems, birefringence effects and mounting difficulties that were not encountered using thin polymer films.

Whitley, Von H [Los Alamos National Laboratory; Mcgrane, Shawn D [Los Alamos National Laboratory; Moore, David S [Los Alamos National Laboratory; Eakins, Dan E [Los Alamos National Laboratory; Bolme, Cindy A [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

350

Economical Quantum Secure Direct Communication Network with Single Photons  

E-Print Network [OSTI]

A scheme for quantum secure direct communication (QSDC) network is proposed with a sequence of polarized single photons. The single photons are prepared originally in the same state |0> by the servers on the network, which will reduce the difficulty for the legitimate users to check eavesdropping largely. The users code the information on the single photons with two unitary operations which do not change their measuring bases. Some decoy photons, which are produced by operating the sample photons with a Hadamard, are used for preventing a potentially dishonest server from eavesdropping the quantum lines freely. This scheme is an economical one as it is the easiest way for QSDC network communication securely.

Fu-Guo Deng; Xi-Han Li; Chun-Yan Li; Ping Zhou; Hong-Yu Zhou

2006-06-01T23:59:59.000Z

351

Clay Nanoparticle-Supported Single-Molecule Fluorescence Spectroelectrochemistry  

SciTech Connect (OSTI)

We report single-molecule fluorescence spectroelectrochemistry on a clay-modified ITO electrode using cresyl violet as a redox fluorescent probe. Ensemble averaged experiments show that cresyl violet displays well-defined cyclic voltammograms when adsorbed on the clay-modified electrode. By probing the fluorescence intensity of a single cresyl violet molecule absorbed on clay surface, we can trace the redox reaction of individual molecules induced by the cyclic voltammetric potential scanning. Inhomogeneous interfacial electron transfer dynamics of the immobilized single cresyl violet molecules on the clay-modified surface were observed.

Lei, Chenghong; Hu, Dehong; Ackerman, Eric J.

2009-02-11T23:59:59.000Z

352

Methods for forming particles from single source precursors  

DOE Patents [OSTI]

Single source precursors are subjected to carbon dioxide to form particles of material. The carbon dioxide may be in a supercritical state. Single source precursors also may be subjected to supercritical fluids other than supercritical carbon dioxide to form particles of material. The methods may be used to form nanoparticles. In some embodiments, the methods are used to form chalcopyrite materials. Devices such as, for example, semiconductor devices may be fabricated that include such particles. Methods of forming semiconductor devices include subjecting single source precursors to carbon dioxide to form particles of semiconductor material, and establishing electrical contact between the particles and an electrode.

Fox, Robert V. (Idaho Falls, ID); Rodriguez, Rene G. (Pocatello, ID); Pak, Joshua (Pocatello, ID)

2011-08-23T23:59:59.000Z

353

Investigation of single unit flashovers in HVDC insulator strings  

SciTech Connect (OSTI)

In HVDC transmission lines, a special phenomenon, so called single unit flashover, is observed under some special conditions. Only one or two insulator units repeat flashovers, not resulting in an overall flashover along the string. However, higher magnitudes of audible noise, radio and television interferences, may give a serious problem. Based on the investigation on {+-}500-kV full scale insulator strings, higher occurrence probability of single unit flashovers under cold-wet-switch-on conditions was clarified compared with normal continuous operating voltage conditions. Effectiveness of the newly proposed countermeasures to prevent single unit flashovers was demonstrated by experiments in laboratory and in field.

Ishikawa, Kouichi; Kageyama, Hiroshi; Yamada, Yasuhiro [Kansai Electric Power Co., Inc., Osaka (Japan)] [Kansai Electric Power Co., Inc., Osaka (Japan); Matsuoka, Ryosuke; Ito, Susumu; Sakanishi, Kenji [NGK Insulators, Ltd., Nagoya (Japan)] [NGK Insulators, Ltd., Nagoya (Japan)

1996-10-01T23:59:59.000Z

354

Single, Key Gene Discovery Could Streamline Production of Biofuels |  

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

Single, Key Gene Discovery Could Streamline Production of Biofuels Single, Key Gene Discovery Could Streamline Production of Biofuels Single, Key Gene Discovery Could Streamline Production of Biofuels August 11, 2011 - 3:51pm Addthis WASHINGTON, DC -- A team of researchers at the Department of Energy's BioEnergy Science Center (BESC) have pinpointed the exact, single gene that controls ethanol production capacity in a microorganism. This discovery could be the missing link in developing biomass crops that produce higher concentrations of ethanol at lower costs. "The Department of Energy relies on the scientific discoveries of its labs and research centers to improve the production of clean energy sources," said Energy Secretary Steven Chu. "This discovery is an important step in developing biomass crops that could increase yield of

355

ARM - Field Campaign - Summer Single Column Model IOP  

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

govCampaignsSummer Single Column Model IOP govCampaignsSummer Single Column Model IOP Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Summer Single Column Model IOP 1997.06.18 - 1997.07.18 Lead Scientist : David Randall Data Availability Actual data files for a number of past SCM IOPs are available from the ARM Archive IOP Server Cloud and Radiation Products Derived from Satellite Data Colorado State's Single Column Modeling Home Page For data sets, see below. Summary During the IOP, 1180 sondes were launched, with 4 missing data due to weather related problems and 24 terminating before 10,000 m (10 km). Description The Summer 1997 SCM IOP was scheduled with the SGP97 Campaign. With additional NASA funding, the IOP was extended so that the total IOP covered

356

ARM - Field Campaign - Winter Single Column Model IOP  

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

govCampaignsWinter Single Column Model IOP govCampaignsWinter Single Column Model IOP Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Winter Single Column Model IOP 1999.01.19 - 1999.02.08 Lead Scientist : David Randall Data Availability Actual data files for a number of past SCM IOPs are available from the ARM Archive under IOPs/UAV. Cloud and Radiation Products Derived from Satellite Data Colorado State's Single Column Modeling Home Page For data sets, see below. Description A second winter SCM IOP was conducted (1/19 - 2/8/99) to provide additional sampling of winter weather conditions. This was the first SCM IOP where AERIs and ceilometers were installed at the boundary facilities to give retrievals of temperature and moisture to supplement the sounding data. A

357

ARM - Publications: Science Team Meeting Documents: Ensemble Single Column  

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

Ensemble Single Column Modelling (ESCM) in the Tropical Western Pacific Ensemble Single Column Modelling (ESCM) in the Tropical Western Pacific Hume, Timothy Bureau of Meteorology Research Centre Jakob, Christian BMRC Single column models (SCMs) are useful tools for the evaluation of parameterisations of radiative and moist processes used in general circulation models. Most SCM studies to date have concentrated on regions where there is a sufficiently dense observational network to derive the required forcing data, such as the Southern Great Plains. This poster describes an ensemble single column modelling (ESCM) approach, where an ensemble of SCM forcing data sets are derived from numerical weather prediction (NWP) analyses. The technique is applied to SCM runs at the Manus Island and Nauru ARM sites in the Tropical Western Pacific (TWP). It

358

Single-Issue Industrial Revenue Bond Program (Missouri) | Department of  

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

Single-Issue Industrial Revenue Bond Program (Missouri) Single-Issue Industrial Revenue Bond Program (Missouri) Single-Issue Industrial Revenue Bond Program (Missouri) < Back Eligibility Commercial Construction Industrial Retail Supplier Systems Integrator Utility Savings Category Alternative Fuel Vehicles Hydrogen & Fuel Cells Buying & Making Electricity Water Home Weatherization Solar Program Info State Missouri Program Type Bond Program Provider Missouri Development Finance Board The Missouri Development Finance Board administers a Single-Issue Tax-Exempt Industrial Revenue Bond Program as well as a Taxable Industrial Revenue Bond Program. The Tax-Exempt Program finances (i) the acquisition, construction and equipping of qualified manufacturing production facilities and/or equipment, and (ii) refinances outstanding tax-exempt bonds. It

359

Monitoring Single-Molecule Reactivity on a Carbon Nanotube  

E-Print Network [OSTI]

measurements and simultaneously illuminating additional dynamics, these results demonstrate this platform as ultrasen- sitive chemical and biological sensors. For example, by tailoring the surface chemistry of tools for investigating complex chemical processes. Single-molecule chemical detection has been

Weiss, Gregory A.

360

Modeling and analysis of single-molecule experiments  

E-Print Network [OSTI]

Single molecule experiments offer a unique window into the molecular world. This window allows us to distinguish the behaviors of individual molecules from the behavior of bulk by observing rare events and heterogeneity ...

Witkoskie, James B

2005-01-01T23:59:59.000Z

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


361

Nanofluidic system for single molecule manipulation and analysis  

E-Print Network [OSTI]

This thesis focuses on characterizing and controlling the translocation of single 48.5 kbp [lambda]-DNA molecules through an artificial nanopore with the objective of enabling multiple measurements on the same molecule. ...

Sen, Yi-Heng

2008-01-01T23:59:59.000Z

362

Single-Cell Microbiology: Tools, Technologies, and Applications  

Science Journals Connector (OSTI)

...109). CONCLUSIONS AND FUTURE PERSPECTIVES Individual microbial...much more to explore in the future of single-cell microbiology...bacterial motion: superconducting quantum interference device microscopy...relationship of the flagellar rotary motor of Escherichia coli. Biophys...

Byron F. Brehm-Stecher; Eric A. Johnson

2004-09-01T23:59:59.000Z

363

Constitutive modeling of creep of single crystal superalloys  

E-Print Network [OSTI]

In this work, a constitutive theory is developed, within the context of continuum mechanics, to describe the creep deformation of single crystal superalloys. The con- stitutive model that is developed here is based on the fact that as bodies deform...

Prasad, Sharat Chand

2006-10-30T23:59:59.000Z

364

Single P-N junction tandem photovoltaic device  

DOE Patents [OSTI]

A single P-N junction solar cell is provided having two depletion regions for charge separation while allowing the electrons and holes to recombine such that the voltages associated with both depletion regions of the solar cell will add together. The single p-n junction solar cell includes an alloy of either InGaN or InAlN formed on one side of the P-N junction with Si formed on the other side in order to produce characteristics of a two junction (2J) tandem solar cell through only a single P-N junction. A single P-N junction solar cell having tandem solar cell characteristics will achieve power conversion efficiencies exceeding 30%.

Walukiewicz, Wladyslaw (Kensington, CA); Ager, III, Joel W. (Berkeley, CA); Yu, Kin Man (Lafayette, CA)

2012-03-06T23:59:59.000Z

365

Single P-N junction tandem photovoltaic device  

DOE Patents [OSTI]

A single P-N junction solar cell is provided having two depletion regions for charge separation while allowing the electrons and holes to recombine such that the voltages associated with both depletion regions of the solar cell will add together. The single p-n junction solar cell includes an alloy of either InGaN or InAlN formed on one side of the P-N junction with Si formed on the other side in order to produce characteristics of a two junction (2J) tandem solar cell through only a single P-N junction. A single P-N junction solar cell having tandem solar cell characteristics will achieve power conversion efficiencies exceeding 30%.

Walukiewicz, Wladyslaw (Kensington, CA); Ager, III, Joel W. (Berkeley, CA); Yu, Kin Man (Lafayette, CA)

2011-10-18T23:59:59.000Z

366

An All-Electric Single-Molecule Motor  

Science Journals Connector (OSTI)

An All-Electric Single-Molecule Motor ... Many types of molecular motors have been proposed and synthesized in recent years, displaying different kinds of motion, and fueled by different driving forces such as light, heat, or chemical reactions. ...

Johannes S. Seldenthuis; Ferry Prins; Joseph M. Thijssen; Herre S. J. van der Zant

2010-10-11T23:59:59.000Z

367

Solution Techniques for Single-Phase Subchannel Equations  

E-Print Network [OSTI]

A steady-state, single phase subchannel solver was created for the purpose of integration into a multi-physics nuclear fuel performance code. Since applications of such a code include full nuclear reactor core flow simulation, a thorough...

Hansel, Joshua Edmund

2013-04-11T23:59:59.000Z

368

Notes on Single-Particle Reconstruction in Cryogenic  

E-Print Network [OSTI]

Notes on Single-Particle Reconstruction in Cryogenic Electron Microscopy Hemant D. Tagare-dimensional structure of macromolecules. A more modern method is cryogenic electron microscopy (cryo-em), which

Duncan, James S.

369

A Compact Linearisation of Euclidean Single Allocation Hub ...  

E-Print Network [OSTI]

O'Kelly [5] introduced the Uncapacitated Single Allocation p-Hub Median. Problem (USApHMP) in 1987: A set of p hubs is chosen from n possible hub locations ...

2014-11-27T23:59:59.000Z

370

An economical single to three phase converter for induction motors  

E-Print Network [OSTI]

There are several different types of single to three phase converters for induction motors available today. However, many of the presently available phase converters suffer from disadvantages such as high cost or low performance. An economical...

Di Zerega, Philp Van Uytandaele

2012-06-07T23:59:59.000Z

371

ARM - Field Campaign - Summer Single Column Model IOP  

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

: Summer Single Column Model IOP 1999.07.12 - 1999.07.22 Lead Scientist : David Randall Data Availability Data Plots from Colorado State University Data Plots from Livermore...

372

ARM - Field Campaign - Spring Single Column Model IOP  

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

: Spring Single Column Model IOP 1999.03.01 - 1999.03.22 Lead Scientist : David Randall Data Availability Actual data files for a number of past SCM IOPs are available from...

373

ARM - Field Campaign - Spring 1995 Single Column Model IOP  

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

: Spring 1995 Single Column Model IOP 1995.04.01 - 1995.04.30 Lead Scientist : David Randall Data Availability Data Plots from Colorado State University Data Plots from Livermore...

374

ARM - Field Campaign - Summer 1995 Single Column Model IOP  

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

: Summer 1995 Single Column Model IOP 1995.07.01 - 1995.07.31 Lead Scientist : David Randall Data Availability Data Plots from Colorado State University Data Plots from Livermore...

375

ARM - Field Campaign - Fall 1994 Single Column Model IOP  

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

: Fall 1994 Single Column Model IOP 1994.10.01 - 1994.10.31 Lead Scientist : David Randall Data Availability Data Plots from Colorado State University Data Plots from Livermore...

376

Automation of single-cell techniques in neural tissue  

E-Print Network [OSTI]

The highly heterogeneous nature of cells in the context of native tissue environments necessitates the development of tools and techniques that can manipulate and analyze samples with single-cell resolution. While the past ...

Steinmeyer, Joseph D. (Joseph Daly)

2014-01-01T23:59:59.000Z

377

Spontaneous Dissolution of Ultralong Single- and Multiwalled Carbon Nanotubes  

Science Journals Connector (OSTI)

A drop of the SWNT solution was then placed on 200 copper mesh, lacey carbon grid (Ted Pella). ... Penicaud, A.; Poulin, P.; Derre, A.; Anglaret, E.; Petit, P. Spontaneous Dissolution of a Single-Wall Carbon Nanotube Salt J. Am. ...

A. Nicholas G. Parra-Vasquez; Natnael Behabtu; Micah J. Green; Cary L. Pint; Colin C. Young; Judith Schmidt; Ellina Kesselman; Anubha Goyal; Pulickel M. Ajayan; Yachin Cohen; Yeshayahu Talmon; Robert H. Hauge; Matteo Pasquali

2010-07-01T23:59:59.000Z

378

The formation of a single-pulse electrospark deposition spot  

Science Journals Connector (OSTI)

The investigation of the formation mechanism of the rotating-type electrospark deposition (ESD) was presented, based on studying the single-pulse electrospark deposition spot. Four different substrate/electrode couples were selected to produce single-pulse deposition spots. The similar morphology of the spots and element migration tendency were detected. A heuristic physical model was established to interpret this deposition process. The concept of “gush and splash effect” was originally proposed and proved as the dominant factor in the formation mechanism of the single-pulse electrospark deposition spot. In addition, the rotation behavior of the electrode was identified to impact on the formation of the single-pulse deposition spot.

Jun Liu; Ruijun Wang; Yiyu Qian

2005-01-01T23:59:59.000Z

379

Optoelectronic and photonic control of single quantum dots  

E-Print Network [OSTI]

Optoelectronic and photonic control of single quantum dots Samuel James Dewhurst Wolfson College University of Cambridge A thesis submitted for the degree of Doctor of Philosophy April 2010 Declaration This thesis describes work carried out...

Dewhurst, Samuel James

2010-10-12T23:59:59.000Z

380

Tuning Electrical and Optoelectronic Properties of Single Cadmium Telluride Nanoribbon  

E-Print Network [OSTI]

Tuning Electrical and Optoelectronic Properties of Single Cadmium Telluride Nanoribbon Maxwell C.e., electrical resistivity and field-effect transistor (FET) mobility) and optoelectronic property (photocurrent, and magnetic properties with potential application in nanoscale electronic, optoelectronic, spintronics

Chen, Wilfred

Note: This page contains sample records for the topic "nanoclusters out-perform single" 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

North Shore Gas – Single Family Direct Install (Illinois)  

Broader source: Energy.gov [DOE]

Owners of single-family homes, condos, townhomes and two-flats may be eligible for a free installation of new programmable thermostats, pipe insulation, showerheads, and faucet aerators through...

382

Transverse acoustic actuation of Ni-Mn-Ga single crystals  

E-Print Network [OSTI]

Two methods for the transverse acoustic actuation of {110}-cut Ni-Mn-Ga single crystals are discussed. In this actuation mode, crystals are used that have the {110}- type twinning planes parallel to the base of the crystal. ...

Simon, Jesse Matthew

2007-01-01T23:59:59.000Z

383

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

384

Method for single-cell mass and electrophoretic mobility measurement  

E-Print Network [OSTI]

Analysis of single cells using flow cytometry techniques has created a wealth of knowledge about cellular phenomena that could not be obtained by population average measurements. As these techniques are integrated with ...

Dextras, Philip

2010-01-01T23:59:59.000Z

385

Scaffolding Carbon Nanotubes into Single-Molecule Circuitry  

E-Print Network [OSTI]

tion of individual carbon nanotubes. Nano Lett. 3, 613 (C. Dekker: Enzyme-coated carbon nanotubes as single-moleculeing point defects in carbon nanotubes. Nat. Mater. 4, 906 (

Collins, Philip G

2008-01-01T23:59:59.000Z

386

Effects of Single versus Multiple Warnings on Driver Performance  

E-Print Network [OSTI]

Objective: To explore how a single master alarm system affects drivers’ responses when compared to multiple, distinct warnings. Background: Advanced driver warning systems are intended to improve safety, yet inappropriate ...

Cummings, M. L.

2007-01-01T23:59:59.000Z

387

Performance of Large grain and Single Crystal Niobium Cavities  

SciTech Connect (OSTI)

We have fabricated and tested several single and one multi-cell cavity made from large grain niobium of four different ingots. Two cavities at a frequency of ~ 2.2 GHz were made from single crystal sheets. Large grain material was used for four single cell cavities of the HG â and OC shapes, a 7-cell cavity of the HG â shape â all resonating at 1500 MHz â and an ILC_LL single cell cavity at 1300 MHz. We began to explore also different chemical polishing baths such as a 1:1:1 and a 1:1:2 buffered solution and explored the change of cavity performance as a function of material removal. The results from these preliminary investigations are reported in this contribution.

Kneisel, Peter; Ciovati, Gianluigi; Sekutowicz, Jacek

2006-07-01T23:59:59.000Z

388

Single-well Modeling of Coalbed Methane Production  

E-Print Network [OSTI]

curves. Further solution of a specific CBM single-well problem and parametric study for evaluation impact of separate parameters were conducted. Focus of the studies was on well production forecasting, effect of mechanical properties of coal...

Martynova, Elena

2014-01-14T23:59:59.000Z

389

Tools for Single-Molecule Sequence Detection and Manipulation.  

E-Print Network [OSTI]

??The ability to strongly and sequence-specifically attach modifications such as fluorophores and haptens to double-stranded DNA is critical to a variety of single-molecule experiments. We… (more)

Zohar, Hagar

2011-01-01T23:59:59.000Z

390

ON MONOIDS WITH A SINGLE DEFINING RELATOR G. C. Smith  

E-Print Network [OSTI]

. Smith Abstract. This paper concerns single-relator monoid presentations, and di* *scusses Eileen and Roy Smith on the occasion of their Golden Wedding Anniversary;2 G. C. SMITH Results The first result shows that Johnson

Smith, Geoff

391

New Solution Approaches to the General Single Machine Earliness ...  

E-Print Network [OSTI]

Index Terms— single-machine, earliness-tardiness, branch- and-bound .... f(x, tc), the cost of job set x at completion time tc on label L l the slope of label L. L.

2006-11-19T23:59:59.000Z

392

Ge-Au eutectic bonding of Ge {100} single crystals  

Science Journals Connector (OSTI)

We present preliminary results on the eutectic bonding between two {100} Ge single crystal surfaces using thin films of ... Au sample show epitaxial growth of Ge. In sections of the bond, lattice continuity...

W. B. Knowlton; K. M. Itoh; J. W. Beeman; J. H. Emes…

1993-11-01T23:59:59.000Z

393

Fast quantum dot single photon source triggered at telecommunications wavelength  

E-Print Network [OSTI]

We demonstrate a quantum dot single photon source at 900 nm triggered at 300 MHz by a continuous wave telecommunications wavelength laser followed by an electro-optic modulator. The quantum dot is excited by on-chip-generated second harmonic radiation, resonantly enhanced by a GaAs photonic crystal cavity surrounding the InAs quantum dot. Our result suggests a path toward the realization of telecommunications-wavelength-compatible quantum dot single photon sources with speeds exceeding 1 GHz.

Kelley Rivoire; Sonia Buckley; Arka Majumdar; Hyochul Kim; Pierre Petroff; Jelena Vuckovic

2010-12-01T23:59:59.000Z

394

Sub-Rayleigh quantum imaging using single-photon sources  

SciTech Connect (OSTI)

We propose a technique capable of imaging a distinct physical object with sub-Rayleigh resolution in an ordinary far-field imaging setup using single-photon sources and linear optical tools only. We exemplify our method for the case of a rectangular aperture and two or four single-photon emitters obtaining a resolution enhanced by a factor of 2 or 4, respectively.

Thiel, C.; Zanthier, J. von [Institut fuer Optik, Information und Photonik, Universitaet Erlangen-Nuernberg, 91058 Erlangen (Germany); Bastin, T. [Institut de Physique Nucleaire, Atomique et de Spectroscopie, Universite de Liege, 4000 Liege (Belgium); Agarwal, G. S. [Department of Physics, Oklahoma State University, Stillwater, Oklahoma 74078-3072 (United States)

2009-07-15T23:59:59.000Z

395

Single-ultrafine-particle mass spectrometer development and application  

E-Print Network [OSTI]

SINGLE-ULTRAFINE-PARTICLE MASS SPECTROMETER DEVELOPMENT AND APPLICATION A Thesis by STANISLAV Y. GLAGOLENKO 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 August 2004 Major Subject: Mechanical Engineering SINGLE-ULTRAFINE-PARTICLE MASS SPECTROMETER DEVELOPMENT AND APPLICATION A Thesis by STANISLAV Y. GLAGOLENKO Submitted to Texas A&M University in partial...

Glagolenko, Stanislav Yurievich

2004-11-15T23:59:59.000Z

396

Best Management Practice #9: Single-Pass Cooling Equipment  

Broader source: Energy.gov [DOE]

Single-pass or once-through cooling systems provide an opportunity for significant water savings. In these systems, water is circulated once through a piece of equipment and is then disposed down the drain. Types of equipment that typically use single-pass cooling include CAT scanners, degreasers, hydraulic equipment, condensers, air compressors, welding machines, vacuum pumps, ice machines, x-ray equipment, and air conditioners.

397

Higgs boson decays into single photon plus unparticle  

Science Journals Connector (OSTI)

The decay of the standard model Higgs boson into a single photon and a vector unparticle through a one-loop process is studied. For an intermediate-mass Higgs boson, this single photon plus unparticle mode can have a branching ratio comparable with the two-photon discovery mode. The emitted photon has a continuous energy spectrum encoding the nature of the recoil unparticle. It can be measured in precision studies of the Higgs boson after its discovery.

Kingman Cheung; Chong Sheng Li; Tzu-Chiang Yuan

2008-05-16T23:59:59.000Z

398

Observing single molecule chemical reactions on metal nanoparticles.  

SciTech Connect (OSTI)

We report the study of the photodecomposition of single Rhodamine 6G (R6G) dye molecules adsorbed on silver nanoparticles. The nanoparticles were immobilized and spatially isolated on polylysine-derivatized glass coverslips, and confocal laser microspectroscopy was used to obtain surface-enhanced Raman scattering (SERS) spectra from individual R6G molecules. The photodecomposition of these molecules was observed with 150-ms temporal resolution. The photoproduct was identified as graphitic carbon based on the appearance of broad SERS vibrational bands at 1592 cm{sup -1} and 1340 cm{sup -1} observed in both bulk and averaged single-molecule photoproduct spectra. In contrast, when observed at the single-molecule level, the photoproduct yielded sharp SERS spectra. The inhomogeneous broadening of the bulk SERS spectra is due to a variety of photoproducts in different surface orientations and is a characteristic of ensemble-averaged measurements of disordered systems. These single-molecule studies indicate a photodecomposition pathway by which the R6G molecule desorbs from the metal surface, an excited-state photoreaction occurs, and the R6G photoproduct(s) readsorbs to the surface. A SERS spectrum is obtained when either the intact R6G or the R6G photoproduct(s) are adsorbed on a SERS-active site. This work further illustrates the power of single-molecule spectroscopy (SMS) to reveal unique behaviors of single molecules that are not discernable with bulk measurements.

Emory, S. R. (Steven R.); Ambrose, W. Patrick; Goodwin, P. M. (Peter M); Keller, Richard A.

2001-01-01T23:59:59.000Z

399

Single molecule techniques in DNA repair: A primer  

Science Journals Connector (OSTI)

Abstract A powerful new approach has become much more widespread and offers insights into aspects of DNA repair unattainable with billions of molecules. Single molecule techniques can be used to image, manipulate or characterize the action of a single repair protein on a single strand of DNA. This allows search mechanisms to be probed, and the effects of force to be understood. These physical aspects can dominate a biochemical reaction, where at the ensemble level their nuances are obscured. In this paper we discuss some of the many technical advances that permit study at the single molecule level. We focus on DNA repair to which these techniques are actively being applied. DNA repair is also a process that encompasses so much of what single molecule studies benefit – searching for targets, complex formation, sequential biochemical reactions and substrate hand-off to name just a few. We discuss how single molecule biophysics is poised to transform our understanding of biological systems, in particular DNA repair.

Craig D. Hughes; Michelle Simons; Cassidy E. Mackenzie; Bennett Van Houten; Neil M. Kad

2014-01-01T23:59:59.000Z

400

Nanophotonic quantum phase switch with a single atom  

E-Print Network [OSTI]

In analogy to transistors in classical electronic circuits, a quantum optical switch is an important element of quantum circuits and quantum networks. Operated at the fundamental limit where a single quantum of light or matter controls another field or material system, it may enable fascinating applications such as long-distance quantum communication, distributed quantum information processing and metrology, and the exploration of novel quantum states of matter. Here, by strongly coupling a photon to a single atom trapped in the near field of a nanoscale photonic crystal cavity, we realize a system where a single atom switches the phase of a photon, and a single photon modifies the atom's phase. We experimentally demonstrate an atom-induced optical phase shift that is nonlinear at the two-photon level, a photon number router that separates individual photons and photon pairs into different output modes, and a single-photon switch where a single "gate" photon controls the propagation of a subsequent probe fiel...

Tiecke, T G; de Leon, N P; Liu, L R; Vuleti?, V; Lukin, M D

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "nanoclusters out-perform single" 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

Single crystal Processing and magnetic properties of gadolinium nickel  

SciTech Connect (OSTI)

GdNi is a rare earth intermetallic material that exhibits very interesting magnetic properties. Spontaneous magnetostriction occurs in GdNi at T{sub C}, on the order of 8000ppm strain along the c-axis and only until very recently the mechanism causing this giant magnetostriction was not understood. In order to learn more about the electronic and magnetic structure of GdNi, single crystals are required for anisotropic magnetic property measurements. Single crystal processing is quite challenging for GdNi though since the rare-earth transition-metal composition yields a very reactive intermetallic compound. Many crystal growth methods are pursued in this study including crucible free methods, precipitation growths, and specially developed Bridgman crucibles. A plasma-sprayed Gd{sub 2}O{sub 3} W-backed Bridgman crucible was found to be the best means of GdNi single crystal processing. With a source of high-quality single crystals, many magnetization measurements were collected to reveal the magnetic structure of GdNi. Heat capacity and the magnetocaloric effect are also measured on a single crystal sample. The result is a thorough report on high quality single crystal processing and the magnetic properties of GdNi.

Shreve, Andrew John [Ames Laboratory

2012-11-02T23:59:59.000Z

402

Optimal Algorithm for Single-Molecule Identification with Time-Correlated Single-Photon Jo1rg Enderlein*, and Markus Sauer  

E-Print Network [OSTI]

Optimal Algorithm for Single-Molecule Identification with Time-Correlated Single-Photon Counting Jo A pattern-matching procedure for identifying single molecules according to the temporal decay characteristics of the fluorescence is presented and applied to measured single-molecule data of three different

Enderlein, Jörg

403

Single molecule enzymology a la Michaelis-Menten  

E-Print Network [OSTI]

In the past one hundred years, deterministic rate equations have been successfully used to infer enzyme-catalysed reaction mechanisms and to estimate rate constants from reaction kinetics experiments conducted in vitro. In recent years, sophisticated experimental techniques have been developed that allow the measurement of enzyme- catalysed and other biopolymer-mediated reactions inside single cells at the single molecule level. Time course data obtained by these methods are considerably noisy because molecule numbers within cells are typically quite small. As a consequence, the interpretation and analysis of single cell data requires stochastic methods, rather than deterministic rate equations. Here we concisely review both experimental and theoretical techniques which enable single molecule analysis with particular emphasis on the major developments in the field of theoretical stochastic enzyme kinetics, from its inception in the mid-twentieth century to its modern day status. We discuss the differences between stochastic and deterministic rate equation models, how these depend on enzyme molecule numbers and substrate inflow into the reaction compartment and how estimation of rate constants from single cell data is possible using recently developed stochastic approaches.

Ramon Grima; Nils Walter; Santiago Schnell

2013-11-28T23:59:59.000Z

404

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

405

Uniform Directional Alignment of Single-Walled Carbon Nanotubes in Viscous Polymer Flow  

Science Journals Connector (OSTI)

In this work, we probed the effects of shear flow on the alignment of dispersed single-walled carbon nanotubes in polymer solutions. Two different systems were compared:? Single-walled carbon nanotubes dispersed using an anionic surfactant and single-...

Erin Camponeschi; Bill Florkowski; Richard Vance; Glenn Garrett; Hamid Garmestani; Rina Tannenbaum

2006-01-14T23:59:59.000Z

406

http://edocsrpts.doe.gov:80/edocsreports/SingleItem.rpt | Department...  

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

http:edocsrpts.doe.gov:80edocsreportsSingleItem.rpt http:edocsrpts.doe.gov:80edocsreportsSingleItem.rpt http:edocsrpts.doe.gov:80edocsreportsSingleItem.rpt More...

407

Single molecule kinetics. I. Theoretical analysis of indicators James B. Witkoskie and Jianshu Cao  

E-Print Network [OSTI]

Single molecule kinetics. I. Theoretical analysis of indicators James B. Witkoskie and Jianshu Cao February 2004; accepted 2 July 2004 Single molecule experiments reveal intriguing phenomenon in chemical for single molecule experiments and demonstrates the relationships between indicators. Under certain

Cao, Jianshu

408

Single-molecule magnets assembled from oxime stabilized Mn?III triangles  

E-Print Network [OSTI]

tunneling in the single- molecule magnet Mn-12-acetate.and Brechin, E. K. , A Single-Molecule Magnet with a "Twist"Anisotropy Barrier for a Single- Molecule Magnet, Journal of

Stephenson, Casey Justin

2009-01-01T23:59:59.000Z

409

Slowing down single-molecule trafficking through a protein nanopore reveals intermediates for peptide translocation  

E-Print Network [OSTI]

L. -Q. & Shim, J. W. Single molecule sensing by nanoporesusing nanopore-based single-molecule mass spectrometry.L. et al. Slowing down single-molecule trafficking through a

2014-01-01T23:59:59.000Z

410

In Vivo Imaging of Single-Molecule Translocation Through Nuclear Pore Complexes by Pair Correlation Functions  

E-Print Network [OSTI]

SM (2004) Imaging of single-molecule translocation throughNuclear transport of single molecules: dwell times at theMusser SM (2008) Single-molecule measurements of importin

Cardarelli, Francesco; Gratton, Enrico

2010-01-01T23:59:59.000Z

411

Q&A: Single-molecule localization microscopy for biological imaging  

E-Print Network [OSTI]

AL, et al. : Q&A: Single-molecule localization microscopyimaging using single-molecule localization. Annu Rev PhysJ: High-density mapping of single-molecule trajectories with

McEvoy, Ann L; Greenfield, Derek; Bates, Mark; Liphardt, Jan

2010-01-01T23:59:59.000Z

412

Single Column Model Simulations of Cloud Sensitivity to Forcing  

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

Single-Column Model Simulations Single-Column Model Simulations of Cloud Sensitivity to Forcing A. D. Del Genio National Aeronautics and Space Administration Goddard Institute for Space Studies New York, New York A. B. Wolf National Aeronautics and Space Administration SGT, Inc., Goddard Institute for Space Studies New York, New York Introduction The Atmospheric Radiation Measurement (ARM) Program single-column modeling (SCM) framework has to date used several fairly brief intensive observing periods (IOPs) to evaluate the performance of climate model parameterizations. With only a few weather events in each IOP, it is difficult to separate errors associated with the instantaneous dynamical forcing from errors in parameterization. It is also impossible to determine whether model errors are systematic and climatically significant. This

413

Progress and issues in single well seismic imaging | Open Energy  

Open Energy Info (EERE)

form form View source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit with form History Facebook icon Twitter icon » Progress and issues in single well seismic imaging Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Progress and issues in single well seismic imaging Authors Thomas M. Daley, Ernest L. Majer, Roland Gritto and Jerry M. Harris Conference 70th Annual International Meeting of the Society of Exploration Geophysicists, Expanded Abstracts; N/A; 2000/01/01 Published N/A, 2000 DOI Not Provided Check for DOI availability: http://crossref.org Online Internet link for Progress and issues in single well seismic imaging Citation

414

Symmetry Breaking of H2 Dissociation by a Single Photon  

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

Symmetry Breaking of H2 Dissociation by a Single Photon Print Symmetry Breaking of H2 Dissociation by a Single Photon Print A single hydrogen (or deuterium) molecule consists of only two protons (deuterons) and two electrons and is perfectly symmetric. Linearly polarized photons are similarly symmetric. So one might think that the angular distribution of photoelectrons resulting from photoionization of the molecule by the photon accompanied by dissociation into a hydrogen atom and a hydrogen ion would itself be symmetric. However, an international team of researchers from Germany, Spain, and the U.S. has now shown that this need not be the case. When there are multiple quantum paths for the process, interference between waves in the coherent superposition of electron states (which exists when the molecular fragments are still close together) skews the distribution by breaking the molecular symmetry.

415

ARM - Field Campaign - Summer 1994 Single Column Model IOP  

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

govCampaignsSummer 1994 Single Column Model IOP govCampaignsSummer 1994 Single Column Model IOP Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Summer 1994 Single Column Model IOP 1994.07.01 - 1994.07.31 Lead Scientist : David Randall Data Availability Data Plots from Colorado State University Data Plots from Livermore National Laboratory Actual data files for a number of past SCM IOPs are available from the ARM Archive. For data sets, see below. Description These seasonal SCM IOPs are conducted at the Southern Great Plains to enhance the frequency of observations for SCM uses, particularly vertical soundings of temperature, water vapor, and winds. The SCM IOPs are conducted for a period of 21 days. During that time, radiosondes are launched at the Central Facility and the four boundary facilities eight

416

Symmetry Breaking of H2 Dissociation by a Single Photon  

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

Symmetry Breaking of H2 Dissociation by a Single Photon Print Symmetry Breaking of H2 Dissociation by a Single Photon Print A single hydrogen (or deuterium) molecule consists of only two protons (deuterons) and two electrons and is perfectly symmetric. Linearly polarized photons are similarly symmetric. So one might think that the angular distribution of photoelectrons resulting from photoionization of the molecule by the photon accompanied by dissociation into a hydrogen atom and a hydrogen ion would itself be symmetric. However, an international team of researchers from Germany, Spain, and the U.S. has now shown that this need not be the case. When there are multiple quantum paths for the process, interference between waves in the coherent superposition of electron states (which exists when the molecular fragments are still close together) skews the distribution by breaking the molecular symmetry.

417

TOPAZ: the Single Crystal Diffractometer at SNS | ORNL Neutron Sciences  

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

TOPAZ-Single-Crystal Diffractometer TOPAZ-Single-Crystal Diffractometer TOPAZ instrument scientist Christina Hoffmann and scientific associate Matt Frost at TOPAZ. TOPAZ instrument scientist Christina Hoffmann and scientific associate Matt Frost at TOPAZ. TOPAZ is an elastic scattering instrument that allows for probing of material structures and responses under controlled environmental conditions. It enables neutron measurement of the same single-crystal samples that is possible with x-ray diffraction. Data are collected on samples of 0.1 mm3 or less. Resolution is such that an average unit cell size of [50 × 50 × 50] Å3 for compounds of moderate complexity can be easily accommodated. This includes inorganic large and porous framework and guest-host materials, metal (in-)organic cluster and

418

Symmetry Breaking of H2 Dissociation by a Single Photon  

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

Symmetry Breaking of H2 Symmetry Breaking of H2 Dissociation by a Single Photon Symmetry Breaking of H2 Dissociation by a Single Photon Print Wednesday, 25 July 2007 00:00 A single hydrogen (or deuterium) molecule consists of only two protons (deuterons) and two electrons and is perfectly symmetric. Linearly polarized photons are similarly symmetric. So one might think that the angular distribution of photoelectrons resulting from photoionization of the molecule by the photon accompanied by dissociation into a hydrogen atom and a hydrogen ion would itself be symmetric. However, an international team of researchers from Germany, Spain, and the U.S. has now shown that this need not be the case. When there are multiple quantum paths for the process, interference between waves in the coherent superposition of electron states (which exists when the molecular fragments are still close together) skews the distribution by breaking the molecular symmetry.

419

Determination of vertical profiles of aerosol extinction, single scatter  

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

Determination of vertical profiles of aerosol extinction, single scatter Determination of vertical profiles of aerosol extinction, single scatter albedo and asymmetry parameter at Barrow. Sivaraman, Chitra Pacific Northwest National Laboratory Flynn, Connor Pacific Northwest National Laboratory Turner, David University of Wisconsin-Madison Category: Aerosols Efforts are currently underway to run and evaluate the Broadband Heating Rate Profile project at the ARM North Slope of Alaska (NSA) Barrow site for the time period March 2004 - February 2005. The Aerosol Best-Estimate (ABE) Value-Added Procedure (VAP) is to provide continuous estimates of vertical profiles of aerosol extinction, single-scatter albedo, and asymmetry parameter above the Northern Slopes of Alaska (NSA) facility. In the interest of temporal continuity, we have developed an algorithm that

420

Extreme thermophiles: moving beyond single-enzyme biocatalysis  

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

COCHE-51; NO. OF PAGES 10 COCHE-51; NO. OF PAGES 10 Please cite this article in press as: Frock AD, Kelly RM. Extreme thermophiles: moving beyond single-enzyme biocatalysis, Curr Opin Chem Eng (2012), http://dx.doi.org/10.1016/ j.coche.2012.07.003 Available online at www.sciencedirect.com Extreme thermophiles: moving beyond single-enzyme biocatalysis Andrew D Frock and Robert M Kelly Extremely thermophilic microorganisms have been sources of thermostable and thermoactive enzymes for over 30 years. However, information and insights gained from genome sequences, in conjunction with new tools for molecular genetics, have opened up exciting new possibilities for biotechnological opportunities based on extreme thermophiles that go beyond single-step biotransformations. Although the pace for discovering novel microorganisms has slowed over

Note: This page contains sample records for the topic "nanoclusters out-perform single" 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

ARM - Field Campaign - Winter 1994 Single Column Model IOP  

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

govCampaignsWinter 1994 Single Column Model IOP govCampaignsWinter 1994 Single Column Model IOP Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Winter 1994 Single Column Model IOP 1994.01.01 - 1994.01.31 Lead Scientist : David Randall Data Availability Data Plots from Colorado State University Data Plots from Livermore National Laboratory Actual data files for a number of past SCM IOPs are available from the ARM Archive. For data sets, see below. Description These seasonal SCM IOPs are conducted at the Southern Great Plains to enhance the frequency of observations for SCM uses, particularly vertical soundings of temperature, water vapor, and winds. The SCM IOPs are conducted for a period of 21 days. During that time, radiosondes are launched at the Central Facility and the four boundary facilities eight

422

California Solar Initiative - Single-Family Affordable Solar Housing (SASH)  

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

California Solar Initiative - Single-Family Affordable Solar California Solar Initiative - Single-Family Affordable Solar Housing (SASH) Program California Solar Initiative - Single-Family Affordable Solar Housing (SASH) Program < Back Eligibility Low-Income Residential Savings Category Solar Buying & Making Electricity Maximum Rebate 10,000 for fully subsidized systems No maximum stated for partially subsidized systems Program Info Start Date 7/1/2009 Expiration Date 12/31/2015 State California Program Type State Rebate Program Rebate Amount Varies depending on participant's income level and California Alternate Rates for Energy (CARE) program eligibility. (see below) Provider GRID Alternatives The California Solar Initiative (CSI) provides financial incentives for installing solar technologies through a variety of smaller sub-programs. Of

423

ARM - Field Campaign - Fall 1995 Single Column Model IOP  

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

Single Column Model IOP Single Column Model IOP Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Fall 1995 Single Column Model IOP 1995.09.01 - 1995.10.31 Lead Scientist : David Randall Data Availability Data Plots from Colorado State University Data Plots from Livermore National Laboratory Actual data files for a number of past SCM IOPs are available from the ARM Archive. For data sets, see below. Description These seasonal SCM IOPs are conducted at the Southern Great Plains to enhance the frequency of observations for SCM uses, particularly vertical soundings of temperature, water vapor, and winds. The SCM IOPs are conducted for a period of 21 days. During that time, radiosondes are launched at the Central Facility and the four boundary facilities eight

424

Self-seeded single-frequency laser peening method  

DOE Patents [OSTI]

A method of operating a laser to obtain an output pulse having a single wavelength, comprises inducing an intracavity loss into a laser resonator having an amount that prevents oscillation during a time that energy from the pump source is being stored in the gain medium. Gain is built up in the gain medium with energy from the pump source until formation of a single-frequency relaxation oscillation pulse in the resonator. Upon detection of the onset of the relaxation oscillation pulse, the intracavity loss is reduced, such as by Q-switching, so that the built-up gain stored in the gain medium is output from the resonator in the form of an output pulse at a single frequency. An electronically controllable output coupler is controlled to affect output pulse characteristics. The laser acts a master oscillator in a master oscillator power amplifier configuration. The laser is used for laser peening.

DAne, C.Brent; Hackey, Lloyd A.; Harris, Fritz B.

2012-06-26T23:59:59.000Z

425

Operation and biasing for single device equivalent to CMOS  

DOE Patents [OSTI]

Disclosed are semiconductor devices including at least one junction which is rectifying whether the semiconductor is caused to be N or P-type, by the presence of field induced carriers. In particular, inverting and non-inverting gate voltage channel induced semiconductor single devices with operating characteristics similar to conventional multiple device CMOS systems, which can be operated as modulators, are disclosed as are a non-latching SCR and an approach to blocking parasitic currents. Operation of the gate voltage channel induced semiconductor single devices with operating characteristics similar to multiple device CMOS systems under typical bias schemes is described, and simple demonstrative five mask fabrication procedures for the inverting and non-inverting gate voltage channel induced semiconductor single devices with operating characteristics similar to multiple device CMOS systems are also presented.

Welch, James D. (10328 Pinehurst Ave., Omaha, NE 68124)

2001-01-01T23:59:59.000Z

426

A bosonic Josephson junction controlled by a single trapped ion  

E-Print Network [OSTI]

We theoretically investigate the properties of a double-well bosonic Josephson junction coupled to a single trapped ion. We find that the coupling between the wells can be controlled by the internal state of the ion, which can be used for studying mesoscopic entanglement between the two systems and to measure their interaction with high precision. As a particular example we consider a single $^{87}$Rb atom and a small Bose-Einstein condensate controlled by a single $^{171}$Yb$^+$ ion. We calculate inter-well coupling rates reaching hundreds of Hz, while the state dependence amounts to tens of Hz for plausible values of the currently unknown s-wave scattering length between the atom and the ion. The analysis shows that it is possible to induce either the self-trapping or the tunneling regime, depending on the internal state of the ion. This enables the generation of large scale ion-atomic wavepacket entanglement within current technology.

R. Gerritsma; A. Negretti; H. Doerk; Z. Idziaszek; T. Calarco; F. Schmidt-Kaler

2012-07-25T23:59:59.000Z

427

Active Brownian Particles Escaping a Channel in Single File  

E-Print Network [OSTI]

Active particles may happen to be confined in channels so narrow that they cannot overtake each other (Single File conditions). This interesting situation reveals nontrivial physical features as a consequence of the strong inter-particle correlations developed in collective rearrangements. We consider a minimal model for active Brownian particles with the aim of studying the modifications introduced by activity with respect to the classical (passive) Single File picture. Depending on whether their motion is dominated by translational or rotational diffusion, we find that active Brownian particles in Single File may arrange into clusters which are continuously merging and splitting ({\\it active clusters}) or merely reproduce passive-motion paradigms, respectively. We show that activity convey to self-propelled particles a strategic advantage for trespassing narrow channels against external biases (e.g., the gravitational field).

Emanuele Locatelli; Fulvio Baldovin; Enzo Orlandini; Matteo Pierno

2014-11-27T23:59:59.000Z

428

Single Ion Trapping For The Enriched Xenon Observatory  

E-Print Network [OSTI]

In the last decade, a variety of neutrino oscillation experiments have established that there is a mass difference between neutrino flavors, without determining the absolute neutrino mass scale. The Enriched Xenon Observatory for neutrinoless double beta decay (EXO) will search for the rare decays of xenon to determine the absolute value of the neutrino mass. The experiment uses a novel technique to minimize backgrounds, identifying the decay daughter product in real time using single ion spectroscopy. Here, we describe single ion trapping and spectroscopy compatible with the EXO detector. We extend the technique of single ion trapping in ultrahigh vacuum to trapping in xenon gas. With this technique, EXO will achieve a neutrino mass sensitivity of ? m?? ≃ .010 eV.

Waldman, S J

2005-01-01T23:59:59.000Z

429

On the electronic properties of a single dislocation  

SciTech Connect (OSTI)

A detailed knowledge of the electronic properties of individual dislocations is necessary for next generation nanodevices. Dislocations are fundamental crystal defects controlling the growth of different nanostructures (nanowires) or appear during device processing. We present a method to record electric properties of single dislocations in thin silicon layers. Results of measurements on single screw dislocations are shown for the first time. Assuming a cross-section area of the dislocation core of about 1?nm{sup 2}, the current density through a single dislocation is J?=?3.8?×?10{sup 12}?A/cm{sup 2} corresponding to a resistivity of ????1?×?10{sup ?8} ? cm. This is about eight orders of magnitude lower than the surrounding silicon matrix. The reason of the supermetallic behavior is the high strain in the cores of the dissociated dislocations modifying the local band structure resulting in high conductive carrier channels along defect cores.

Reiche, Manfred, E-mail: reiche@mpi-halle.de; Erfurth, Wilfried; Pippel, Eckhard; Sklarek, Kornelia; Blumtritt, Horst; Haehnel, Angelika [Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle (Saale) (Germany); Kittler, Martin [IHP microelectronics, Im Technologiepark 25, 15236 Frankfurt (Oder) (Germany); IHP/BTU JointLab, K.-Wachsmann-Allee 1, 03046 Cottbus (Germany); Uebensee, Hartmut [CIS Research Institute of Microsensorics and Photovoltaics, K.-Zuse-Str. 14, 99099 Erfurt (Germany)

2014-05-21T23:59:59.000Z

430

Elastic constants of single crystal Hastelloy X at elevated temperatures  

SciTech Connect (OSTI)

An acoustic time of flight technique is described in detail for measuring the elastic constants of cubic single crystals that allows for the constants to be determined at elevated temperature. Although the overall technique is not new, various aspects of the present work may prove extremely useful to others interested in finding these values, especially for aerospace materials applications. Elastic constants were determined for the nickel based alloy, Hastelloy X from room temperature to 1,000 C. Accurate elastic constants were needed as part of an effort to predict both polycrystal mechanical properties and the nature of grain induced heterogeneous mechanical response. The increased accuracy of the acoustically determined constants resulted in up to a 15% change in the predicted stresses in individual grains. These results indicate that the use of elastic single crystal constants of pure nickel as an approximation for the constants of gas turbine single crystal alloys, which is often done today, is inaccurate.

Canistraro, H.A. [Univ. of Hartford, CT (United States). Dept. of Mechanical and Audio Engineering Technology; Jordan, E.H.; Shi Shixiang [Univ. of Connecticut, Storrs, CT (United States); Favrow, L.H.; Reed, F.A. [United Technologies Research Center, East Hartford, CT (United States)

1998-07-01T23:59:59.000Z

431

Incoherent x-ray scattering in single molecule imaging  

E-Print Network [OSTI]

Imaging of the structure of single proteins or other biomolecules with atomic resolution would be enormously beneficial to structural biology. X-ray free-electron lasers generate highly intense and ultrashort x-ray pulses, providing a route towards imaging of single molecules with atomic resolution. The information on molecular structure is encoded in the coherent x-ray scattering signal. In contrast to crystallography there are no Bragg reflections in single molecule imaging, which means the coherent scattering is not enhanced. Consequently, a background signal from incoherent scattering deteriorates the quality of the coherent scattering signal. This background signal cannot be easily eliminated because the spectrum of incoherently scattered photons cannot be resolved by usual scattering detectors. We present an ab initio study of incoherent x-ray scattering from individual carbon atoms, including the electronic radiation damage caused by a highly intense x-ray pulse. We find that the coherent scattering pa...

Slowik, Jan Malte; Dixit, Gopal; Jurek, Zoltan; Santra, Robin

2014-01-01T23:59:59.000Z

432

Evidence of natural isotopic distribution from single-molecule SERS  

E-Print Network [OSTI]

We report on the observation of the natural isotopic spread of carbon from single-molecule Surface Enhanced Raman Spectroscopy (SM-SERS). By choosing a dye molecule with a very localized Raman active vibration in a cyano bond (C$\\equiv$N triple bond), we observe (in a SERS colloidal liquid) a small fraction of SM-SERS events where the frequency of the cyano mode is softened and in agreement with the effect of substituting $^{12}$C by the next most abundant $^{13}$C isotope. This example adds another demonstration of single molecule sensitivity in SERS through isotopic editing which is done, in this case, not by artificial isotopic editing but rather by nature itself. It also highlights SERS as a unique spectroscopic tool, capable of detecting an isotopic change in one atom of a single molecule.

P. G. Etchegoin; E. C. Le Ru; M. Meyer

2008-11-03T23:59:59.000Z

433

Mechanical seal having a single-piece, perforated mating ring  

DOE Patents [OSTI]

A mechanical seal (e.g., single mechanical seals, double mechanical seals, tandem mechanical seals, bellows, pusher mechanical seals, and all types of rotating and reciprocating machines) with reduced contact surface temperature, reduced contact surface wear, or increased life span. The mechanical seal comprises a rotating ring and a single-piece, perforated mating ring, which improves heat transfer by controllably channeling coolant flow through the single-piece mating ring such that the coolant is in substantially uniform thermal contact with a substantial portion of the interior surface area of the seal face, while maintaining the structural integrity of the mechanical seal and minimizing the potential for coolant flow interruptions to the seal face caused by debris or contaminants (e.g., small solids and trash) in the coolant.

Khonsari, Michael M. (Baton Rouge, LA); Somanchi, Anoop K. (Fremont, CA)

2007-08-07T23:59:59.000Z

434

Analytical model of an isolated single-atom electron source  

Science Journals Connector (OSTI)

Abstract An analytical model of a single-atom electron source is presented, where electrons are created by near-threshold photoionization of an isolated atom. The model considers the classical dynamics of the electron just after the photon absorption, i.e. its motion in the potential of a singly charged ion and a uniform electric field used for acceleration. From closed expressions for the asymptotic transverse electron velocities and trajectories, the effective source temperature and the virtual source size can be calculated. The influence of the acceleration field strength and the ionization laser energy on these properties has been studied. With this model, a single-atom electron source with the optimum electron beam properties can be designed. Furthermore, we show that the model is also applicable to ionization of rubidium atoms, and thus also describes the ultracold electron source, which is based on photoionization of laser-cooled alkali atoms.

W.J. Engelen; E.J.D. Vredenbregt; O.J. Luiten

2014-01-01T23:59:59.000Z

435

Single transmission line interrogated multiple channel data acquisition system  

DOE Patents [OSTI]

A single transmission line interrogated multiple channel data acquisition system is provided in which a plurality of remote station/sensor circuits each monitors a specific process variable and each transmits measurement values over a single transmission line to a master interrogating station when addressed by said master interrogating station. Typically, as many as 330 remote stations may be parallel connected to the transmission line which may exceed 7,000 feet. The interrogation rate is typically 330 stations/second. The master interrogating station samples each station according to a shared, charging transmit-receive cycle. All remote station address signals, all data signals from the remote stations/sensors and all power for all of the remote station/sensors are transmitted via a single continuous terminated coaxial cable. A means is provided for periodically and remotely calibrating all remote sensors for zero and span. A provision is available to remotely disconnect any selected sensor station from the main transmission line.

Fasching, George E. (Morgantown, WV); Keech, Jr., Thomas W. (Morgantown, WV)

1980-01-01T23:59:59.000Z

436

Spectrally tailored supercontinuum generation from single-mode-fiber amplifiers  

SciTech Connect (OSTI)

Spectral filtering of an all-normal-dispersion Yb-doped fiber laser was demonstrated effective for broadband supercontinuum generation in the picosecond time region. The picosecond pump pulses were tailored in spectrum with 1 nm band-pass filter installed between two single-mode fiber amplifiers. By tuning the spectral filter around 1028?nm, four-wave mixing was initiated in a photonic crystal fiber spliced with single-mode fiber, as manifested by the simultaneous generation of Stokes wave at 1076?nm and anti-Stokes wave at 984?nm. Four-wave mixing took place in cascade with the influence of stimulated Raman scattering and eventually extended the output spectrum more than 900?nm of 10?dB bandwidth. This technique allows smooth octave supercontinuum generation by using simple single-mode fiber amplifiers rather than complicated multistage large-mode-area fiber amplifiers.

Hao, Qiang; Guo, Zhengru; Zhang, Qingshan [Shanghai Key Laboratory of Modern Optical System, Engineering Research Center of Optical Instrument and System (Ministry of Education), School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093 (China); Liu, Yang; Li, Wenxue [State Key Laboratory of Precision Spectroscopy, East China Normal University, 3663 Zhongshan North Road, Shanghai 200062 (China); Zeng, Heping, E-mail: hpzeng@phy.ecnu.edu.cn [Shanghai Key Laboratory of Modern Optical System, Engineering Research Center of Optical Instrument and System (Ministry of Education), School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093 (China); State Key Laboratory of Precision Spectroscopy, East China Normal University, 3663 Zhongshan North Road, Shanghai 200062 (China)

2014-05-19T23:59:59.000Z

437

SINGLE CRYSTAL NIOBIUM TUBES FOR PARTICLE COLLIDERS ACCELERATOR CAVITIES  

SciTech Connect (OSTI)

The objective of this research project is to produce single crystal niobium (Nb) tubes for use as particle accelerator cavities for the Fermi laboratory’s International Linear Collider project. Single crystal Nb tubes may have superior performance compared to a polycrystalline tubes because the absence of grain boundaries may permit the use of higher accelerating voltages. In addition, Nb tubes that are subjected to the high temperature, high vacuum crystallization process are very pure and well annealed. Any impurity with a significantly higher vapor pressure than Nb should be decreased by the relatively long exposure at high temperature to the high vacuum environment. After application of the single crystal process, the surfaces of the Nb tubes are bright and shiny, and the tube resembles an electro polished Nb tube. For these reasons, there is interest in single crystal Nb tubes and in a process that will produce single crystal tubes. To convert a polycrystalline niobium tube into a single crystal, the tube is heated to within a few hundred ?C of the melting temperature of niobium, which is 2477 ?C. RF heating is used to rapidly heat the tube in a narrow zone and after reaching the operating temperature, the hot zone is slowly passed along the length of the tube. For crystallization tests with Nb tubes, the traverse rate was in the range of 1-10 cm per hour. All the crystallization tests in this study were performed in a water-cooled, stainless steel chamber under a vacuum of 5 x10-6 torr or better. In earliest tests of the single crystal growth process, the Nb tubes had an OD of 1.9 cm and a wall thickness of 0.15 mm. With these relatively small Nb tubes, the single crystal process was always successful in producing single crystal tubes. In these early tests, the operating temperature was normally maintained at 2200 ?C, and the traverse rate was 5 cm per hour. In the next test series, the Nb tube size was increased to 3.8 cm OD and the wall thickness was increased 0.18 mm and eventually to 0.21 mm. Again, with these larger tubes, single crystal tubes were usually produced by the crystallization process. The power supply was generally operated at full output during these tests, and the traverse rate was 5 cm per hour. In a few tests, the traverse rate was increased to 10 cm per hour, and at the faster traverse rate, single crystal growth was not achieved. In these tests with a faster traverse rate, it was thought that the tube was not heated to a high enough temperature to achieve single crystal growth. In the next series of tests, the tube OD was unchanged at 3.8 cm and the wall thickness was increased to 0.30 mm. The increased wall thickness made it difficult to reach an operating temperature above 2,000 ?C, and although the single crystal process caused a large increase in the crystal grains, no single crystal tubes were produced. It was assumed that the operating temperature in these tests was not high enough to achieve single crystal growth. In FY 2012, a larger power supply was purchased and installed. With the new power supply, temperatures above the melting point of Nb were easily obtained regardless of the tube thickness. A series of crystallization tests was initiated to determine if indeed the operating temperature of the previous tests was too low to achieve single crystal growth. For these tests, the Nb tube OD remained at 3.8 cm and the wall thickness was 0.30 mm. The first test had an operating temperature of 2,000 ?C. and the operating temperature was increased by 50 ?C increments for each successive test. The final test was very near the Nb melting temperature, and indeed, the Nb tube eventually melted in the center of the tube. These tests showed that higher temperatures did yield larger grain sizes if the traverse rate was held constant at 5 cm per hour, but no single crystal tubes were produced even at the highest operating temperature. In addition, slowing the traverse rate to as low as 1 cm per hour did not yield a single crystal tube regardless of operating temperature. At this time, it

MURPHY, JAMES E [University of Nevada, Reno] [University of Nevada, Reno

2013-02-28T23:59:59.000Z

438

Coherent perfect absorption of path entangled single photons  

E-Print Network [OSTI]

We examine the question of coherent perfect absorption (CPA) of single photons, and more generally, of the quantum fields by a {\\it macroscopic} medium. We show the CPA of path entangled single photons in a Fabry-Perot interferometer containing an absorptive medium. The frequency of perfect absorption can be controlled by changing the interferometer parameters like the reflectivity and the complex dielectric constant of the material. We exhibit similar results for path entangled photons in micro-ring resonators. For entangled fields like the ones produced by a down converter the CPA aspect is evident in phase sensitive detection schemes such as in measurements of the squeezing spectrum.

Sumei Huang; G. S. Agarwal

2014-02-28T23:59:59.000Z

439

Wavelength meter having single mode fiber optics multiplexed inputs  

DOE Patents [OSTI]

A wavelength meter having a single mode fiber optics input is disclosed. The single mode fiber enables a plurality of laser beams to be multiplexed to form a multiplexed input to the wavelength meter. The wavelength meter can provide a determination of the wavelength of any one or all of the plurality of laser beams by suitable processing. Another aspect of the present invention is that one of the laser beams could be a known reference laser having a predetermined wavelength. Hence, the improved wavelength meter can provide an on-line calibration capability with the reference laser input as one of the plurality of laser beams.

Hackel, R.P.; Paris, R.D.; Feldman, M.

1993-02-23T23:59:59.000Z

440

Nanoscale fluorescence lifetime imaging with a single diamond NV center  

E-Print Network [OSTI]

Solid-state quantum emitters, such as artificially engineered quantum dots or naturally occurring defects in solids, are being investigated for applications ranging from quantum information science and optoelectronics to biomedical imaging. Recently, these same systems have also been studied from the perspective of nanoscale metrology. In this letter we study the near-field optical properties of a diamond nanocrystal hosting a single nitrogen vacancy center. We find that the nitrogen vacancy center is a sensitive probe of the surrounding electromagnetic mode structure. We exploit this sensitivity to demonstrate nanoscale fluorescence lifetime imaging microscopy (FLIM) with a single nitrogen vacancy center by imaging the local density of states of an optical antenna.

Ryan Beams; Dallas Smith; Timothy W. Johnson; Sang-Hyun Oh; Lukas Novotny; Nick Vamivakas

2013-03-05T23:59:59.000Z

Note: This page contains sample records for the topic "nanoclusters out-perform single" 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

Diamond turning of Si and Ge single crystals  

SciTech Connect (OSTI)

Single-point diamond turning studies have been completed on Si and Ge crystals. A new process model was developed for diamond turning which is based on a critical depth of cut for plastic flow-to-brittle fracture transitions. This concept, when combined with the actual machining geometry for single-point turning, predicts that {open_quotes}ductile{close_quotes} machining is a combined action of plasticity and fracture. Interrupted cutting experiments also provide a meant to directly measure the critical depth parameter for given machining conditions.

Blake, P.; Scattergood, R.O.

1988-12-01T23:59:59.000Z

442

Method for thermal processing alumina-enriched spinel single crystals  

DOE Patents [OSTI]

A process for age-hardening alumina-rich magnesium aluminum spinel to obtain the desired combination of characteristics of hardness, clarity, flexural strength and toughness comprises selection of the time-temperature pair for isothermal heating followed by quenching. The time-temperature pair is selected from the region wherein the precipitate groups have the characteristics sought. The single crystal spinel is isothermally heated and will, if heated long enough pass from its single phase through two pre-precipitates and two metastable precipitates to a stable secondary phase precipitate within the spinel matrix. Quenching is done slowly at first to avoid thermal shock, then rapidly. 12 figs.

Jantzen, C.M.

1995-05-09T23:59:59.000Z

443

Separating and combining single-mode and multimode optical beams  

DOE Patents [OSTI]

Techniques for combining initially separate single mode and multimode optical beams into a single "Dual Mode" fiber optic have been developed. Bi-directional propagation of two beams that are differentiated only by their mode profiles (i.e., wavefront conditions) is provided. The beams can be different wavelengths and or contain different modulation information but still share a common aperture. This method allows the use of conventional micro optics and hybrid photonic packaging techniques to produce small rugged packages suitable for use in industrial or military environments.

Ruggiero, Anthony J; Masquelier, Donald A; Cooke, Jeffery B; Kallman, Jeffery S

2013-11-12T23:59:59.000Z

444

Wavelength meter having single mode fiber optics multiplexed inputs  

DOE Patents [OSTI]

A wavelength meter having a single mode fiber optics input is disclosed. The single mode fiber enables a plurality of laser beams to be multiplexed to form a multiplexed input to the wavelength meter. The wavelength meter can provide a determination of the wavelength of any one or all of the plurality of laser beams by suitable processing. Another aspect of the present invention is that one of the laser beams could be a known reference laser having a predetermined wavelength. Hence, the improved wavelength meter can provide an on-line calibration capability with the reference laser input as one of the plurality of laser beams.

Hackel, Richard P. (Livermore, CA); Paris, Robert D. (San Ramon, CA); Feldman, Mark (Pleasanton, CA)

1993-01-01T23:59:59.000Z

445

Single Molecule as a Local Acoustic Detector for Mechanical Oscillators  

Science Journals Connector (OSTI)

A single molecule can serve as a nanometer-sized detector of acoustic strain. Such a nanomicrophone has the great advantage that it can be placed very close to acoustic signal sources and high sensitivities can be achieved. We demonstrate this scheme by monitoring the fluorescence intensity of a single dibenzoterrylene molecule in an anthracene crystal attached to an oscillating tuning fork. The characterization of the vibration amplitude and of the detection sensitivity is a first step towards detection and control of nanomechanical oscillators through optical detection and feedback.

Yuxi Tian; Pedro Navarro; Michel Orrit

2014-09-26T23:59:59.000Z

446

Single-Molecule Measurements of Gold-Quenched Quantum Dots  

Science Journals Connector (OSTI)

We report the study of the quenching of quantum dots (CdSe) by gold nanoparticles at the single-molecule level. Double-stranded DNA is used as a rigid spacer to tune the distance between the two nanoparticles. The width of the fluorescent intensity distribution, monitored at different interparticle distances, reflects both the nanoparticle heterogeneity and the fluorescence intermittency of the quantum dot. The fluorescence distribution emitted by single CdSe nanocrystals can easily be distinguished from the fluorescence of partially quenched CdSe. Our results show that the distance-dependence quenching is compatible with a Förster-type process.

Zoher Gueroui and Albert Libchaber

2004-10-15T23:59:59.000Z

447

E-Print Network 3.0 - aligned single-walled carbon Sample Search...  

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

Summary: Thermal conductivity measurement of vertically-aligned single-walled carbon nanotubes by 3 omega... the high-purity vertically aligned single-walled carbon nanotubes 2,...

448

E-Print Network 3.0 - antibody-functionalized single-walled carbon...  

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

5 > >> 1 Molecular Dynamics Simulation of Nucleation Process of Single-Walled Carbon Nanotubes Summary: Molecular Dynamics Simulation of Nucleation Process of Single-Walled Carbon...

449

E-Print Network 3.0 - aligned single wall Sample Search Results  

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

Summary: Thermal conductivity measurement of vertically-aligned single-walled carbon nanotubes by 3 omega... the high-purity vertically aligned single-walled carbon nanotubes 2,...

450

Detecting single-particle insulating collisions in microfluidics as a function of flow rate.  

E-Print Network [OSTI]

??This work presents the first electrochemical observation of single polystyrene microbead collisions with an electrode within a microchannel. We have observed that detecting single microbead… (more)

Nettleton, Elizabeth Grace

2012-01-01T23:59:59.000Z

451

Single Molecule Chiroptical Spectroscopy: Fluorescence Excitation Circular Dichroism and Circular Polarized Luminescence of Bridged Triarylamine Helicenes.  

E-Print Network [OSTI]

??In this thesis, I describe the first exploratory experimental efforts probing light-matter interactions of chiral systems at the single molecule level. The dissymmetric single molecule… (more)

Paradise, Ruthanne Hassey

2009-01-01T23:59:59.000Z

452

Deterministic source of a train of indistinguishable single-photon pulses with single-atom-cavity system  

E-Print Network [OSTI]

We present a mechanism to produce indistinguishable single-photon pulses on demand from an optical cavity. The sequences of two laser pulses generate, at the two Raman transitions of a four-level atom, the same cavity-mode photons without repumping of the atom between photon generations. Photons are emitted from the cavity with near-unit efficiency in well-defined temporal modes of identical shapes controlled by the laser fields. The second order correlation function reveals the single-photon nature of the proposed source. A realistic setup for the experimental implementation is presented.

A. Gogyan; S. Guérin; H. -R. Jauslin; Yu. Malakyan

2010-05-01T23:59:59.000Z

453

Intrinsic carrier mobility of a single-layer graphene covalently bonded with single-walled carbon nanotubes  

SciTech Connect (OSTI)

We report intrinsic carrier mobility calculations of a two-dimensional nanostructure that consists of porous single layer graphene covalently bonded with single-walled carbon nanotubes on both sides. We used first-principles calculation and found that the deformation potential of such system is about 25% of that of graphene, and the carrier mobility is about 5?×?10{sup 4} cm{sup 2} V{sup ?1} s{sup ?1} for both electrons and holes, about one order of magnitude lower than that of graphene. This nanostructure and its three-dimensional stacking could serve as novel organic electronic materials.

Li, Dian; Shao, Zhi-Gang [Laboratory of Quantum Engineering and Quantum Materials, School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou, Guangdong 510006 (China); Hao, Qing [Department of Aerospace and Mechanical Engineering, University of Arizona, Tucson, Arizona 85721 (United States); Zhao, Hongbo, E-mail: zhaohb@scnu.edu.cn [Laboratory of Quantum Engineering and Quantum Materials, School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou, Guangdong 510006 (China); Department of Aerospace and Mechanical Engineering, University of Arizona, Tucson, Arizona 85721 (United States)

2014-06-21T23:59:59.000Z

454

Fuzzy Genome Sequence Assembly for Single and Environmental Genomes  

E-Print Network [OSTI]

Fuzzy Genome Sequence Assembly for Single and Environmental Genomes Sara Nasser, Adrienne Breland. Traditional methods obtain a microorganism's DNA by culturing it in- dividually. Recent advances in genomics microbial commu- nities are often very complex with tens and hundreds of species. Assembling these genomes

Nicolescu, Monica

455

Model systems for single molecule polymer Folarin Latinwoa  

E-Print Network [OSTI]

, including synthetic organic polymers. Recently, we developed single stranded DNA (ssDNA) as a new model, the local phys- ical and chemical properties of dsDNA are distinct from common synthetic organic polymer DNA (ssDNA).15 ssDNA is a flexible polymer with local physical properties similar to synthetic organic

Schroeder, Charles

456

DNA heterogeneity and phosphorylation unveiled by single-molecule electrophoresis  

E-Print Network [OSTI]

scatter plots. Materials and Methods Nucleic Acid Preparations. Synthetic DNA oligonucleotides were purchased from different commercial suppliers. DNA prepared by PCR was amplified with synthetic primers fromDNA heterogeneity and phosphorylation unveiled by single-molecule electrophoresis Hui Wang*, James

457

Cancer Phylogenetics from Single-Cell Assays Gregory Pennington  

E-Print Network [OSTI]

Cancer Phylogenetics from Single-Cell Assays Gregory Pennington Stanley Shackney Russell Schwartz the Carnegie Mellon University Berkman Faculty Development Fund. #12;Keywords: computational biology, cancer, FISH, phylogeny #12;Abstract In the field of cancer biology, there is currently great interest

458

Single spin asymmetries and vector meson production in DIS  

E-Print Network [OSTI]

We discuss possible measurements and origins of single spin asymmetries in DIS and of some unusual spin properties of vector mesons produced in lepton- nucleon, photon-nucleon and photon-photon interactions. Such effects have already been observed in other processes.

Mauro Anselmino; Francesco Murgia

1998-07-14T23:59:59.000Z

459

Single metallic nanoparticle imaging for protein detection in cells  

Science Journals Connector (OSTI)

...to sensitive areas. The main...intensities. Single large metal particles...particle at its plasma resonance...a humidified atmosphere (95%) at...frequency of 1 MHz, we find {delta}{phi...for example, larger heating intensities...frequency of 1 MHz, we measured {delta...per focal spot area ?0.07 {mu...

L. Cognet; C. Tardin; D. Boyer; D. Choquet; P. Tamarat; B. Lounis

2003-01-01T23:59:59.000Z

460

INTERGRANULAR CORROSION OF SINGLE PHASE ALUMINIUM AS A PITTING PHENOMENON  

E-Print Network [OSTI]

INTERGRANULAR CORROSION OF SINGLE PHASE ALUMINIUM AS A PITTING PHENOMENON M. METZGER Department of pitting corrosion in sulfuric acid containing sodium chloride were described. Intergranular fissuring in producing this type of attack. The intergranular corrosion phenomena which are exhibited by high purity

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "nanoclusters out-perform single" 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

Single-and Multi-Point Aerodynamic Shape Optimization  

E-Print Network [OSTI]

Single- and Multi-Point Aerodynamic Shape Optimization Using A Parallel Newton-Krylov Approach, Ontario, M3H 5T6, Canada A Newton-Krylov algorithm for aerodynamic shape optimization in three dimensions the capabilities and efficiency of the approach. I. Introduction In the aerodynamic design of aircraft, there have

Zingg, David W.

462

Quantum confinement in single layer a-Si:H films  

SciTech Connect (OSTI)

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

463

Assessment of solution uncertainties in single-column modeling frameworks  

SciTech Connect (OSTI)

Single-column models (SCMs) have been extensively promoted in recent years as an effective means to develop and test physical parameterizations targeted for more complex three-dimensional climate models. Although there are some clear advantages associated with single-column modeling, there are also some significant disadvantages, including the absence of large-scale feedbacks. Basic limitations of an SCM framework can make it difficult to interpret solutions, and at times contribute to rather striking failures to identify even first-order sensitivities as they would be observed in a global climate simulation. This manuscript will focus on one of the basic experimental approaches currently exploited by the single-column modeling community, with an emphasis on establishing the inherent uncertainties in the numerical solutions. The analysis will employ the standard physics package from the NCAR CCM3 and will illustrate the nature of solution uncertainties that arise from nonlinearities in parameterized physics. The results of this study suggest the need to make use of an ensemble methodology when conducting single-column modeling investigations.

Hack, J.J.; Pedretti, J.A.

2000-01-15T23:59:59.000Z

464

Single element changes in electrical networks Thomas Berger,  

E-Print Network [OSTI]

, Ilmenau University of Technology Page 2 / 13 #12;Example: electrical RLC network Z(s)i(s) = vs(s), ZSingle element changes in electrical networks Thomas Berger, George Halikias and Nicos Karcanias, February 23, 2012 Single element changes in electrical networks Thomas Berger, George Halikias and Nicos

Knobloch,Jürgen

465

Electrochemical and Raman measurements on single-walled carbon nanotubes  

E-Print Network [OSTI]

Electrochemical and Raman measurements on single-walled carbon nanotubes M. Stoll a,*, P performed on a carbon nanotube mat as a working electrode using different salt solutions. The gravimetric capacitance of the nanotube material was estimated and its effective surface area was de- termined in a purely

Nabben, Reinhard

466

Scanning tunneling spectroscopy of suspended single-wall carbon nanotubes  

E-Print Network [OSTI]

Scanning tunneling spectroscopy of suspended single-wall carbon nanotubes B. J. LeRoy,a) S. G-wall carbon nanotubes that are freely suspended over a trench. The nanotubes were grown by chemical vapor on the freestanding portions of the nanotubes. Spatially resolved spectroscopy on the suspended portion of both

Dekker, Cees

467

EVALUATION OF VALUE CREATION CONCEPTS IN SINGLE FAMILY RESIDENTIAL SUBDIVISIONS  

E-Print Network [OSTI]

values. The study sample is composed of 6,562 single family houses nested in 85 subdivisions in College Station, Texas. Data are composed of two levels: the housing level and the subdivision level. The scores of the sense of arrival were provided...

Shin, Woo Jin

2010-07-14T23:59:59.000Z

468

NANO-SCALE CALORIMETRY OF ISOLATED POLYETHYLENE SINGLE CRYSTALS  

E-Print Network [OSTI]

#12;NANO-SCALE CALORIMETRY OF ISOLATED POLYETHYLENE SINGLE CRYSTALS BY ALEX TAN KWAN B.S., Stanford) device, the nanocalorimeter, it was possible to investigate the melting of isolated polyethylene (PE, a simple Ni-foil calorimeter, to measure the heat capacity of a thin polyethylene film to verify

Allen, Leslie H.

469

The Static Single Information Form C. Scott Ananian  

E-Print Network [OSTI]

The Static Single Information Form by C. Scott Ananian B.S.E. Electrical Engineering Princeton and Computer Science September 3, 1999 Certi#12;ed by Martin Rinard Thesis Supervisor Accepted by Arthur C. Scott Ananian Submmitted to the Department of Electrical Engineering and Computer Science September 3

Ananian, C. Scott

470

Static Single Information Form C. Scott Ananian and Martin Rinard  

E-Print Network [OSTI]

Static Single Information Form C. Scott Ananian and Martin Rinard Laboratory for Computer Science#12;cantly optimize the program. Furthermore, we be- lieve that SSI form signi#12;cantly simpli#12;ed data ow analyses as a at, uni#12;ed system of constraints. This formulation allows us to generalize

Ananian, C. Scott

471

SINGLE STAGE GRID CONVERTERS FOR BATTERY ENERGY STORAGE  

E-Print Network [OSTI]

in the power system network such as wind and solar is still a challenge in our days. Energy storage systemsSINGLE STAGE GRID CONVERTERS FOR BATTERY ENERGY STORAGE I. Trintis*, S. Munk-Nielsen*, R presents power converters for battery energy storage systems (BESS) which can interface medium- voltage

Munk-Nielsen, Stig

472

Low temperature magnetic transitions of single crystal HoBi  

SciTech Connect (OSTI)

We present resistivity, specific heat and magnetization measurements in high quality single crystals of HoBi, with a residual resistivity ratio of 126. We find, from the temperature and field dependence of the magnetization, an antiferromagnetic transition at 5.7 K, which evolves, under magnetic fields, into a series of up to five metamagnetic phases.

Fente, A. [Universidad Autonoma de Madrid; Suderow, H. [Universidad Autonoma de Madrid; Vieira, S. [Universidad Autonoma de Madrid; Nemes, N. M. [Instituto de Ciencia de Materiales de Madrid; Garcia-Hernandez, M. [Instituto de Ciencia de Materiales de Madrid; Budko, Sergei L. [Ames Laboratory; Canfield, Paul C. [Ames Laboratory

2013-09-04T23:59:59.000Z

473

Quantification of surface tension and internal pressure generated by single  

E-Print Network [OSTI]

Quantification of surface tension and internal pressure generated by single mitotic cells Elisabeth of a liquid cell interior, the surface tension is related to the local curvature and the hydrostatic pressure measured confined cell shapes to shapes obeying Laplace's law with uniform surface tension and find

Jülicher, Frank

474

Single Machine Scheduling with a Non-renewable Financial Resource  

E-Print Network [OSTI]

Single Machine Scheduling with a Non-renewable Financial Resource Evgeny R. Gafarov a , Alexander A with a non-renewable resource. For example, money or fuel provide natural examples of such a non-renewable resource. Such problems with a non-renewable resource are also referred to as financial scheduling problems

Magdeburg, Universität

475

Enhancing Single-Objective Projective Clustering Ensembles Francesco Gullo  

E-Print Network [OSTI]

Ensembles (PCE) has re- cently been formulated to solve the problem of deriving a robust projective consensus clustering from an ensemble of projective clustering solutions [1]. PCE is formalized. A major result in [1] is that single-objective PCE outperforms two-objective PCE in terms of efficiency

Domeniconi, Carlotta

476

Hybrid Multilevel Inverter with Single DC Haiwen Liu1  

E-Print Network [OSTI]

Hybrid Multilevel Inverter with Single DC Source Haiwen Liu1 , Leon M. Tolbert1, 2 , Burak Ozpineci Knoxville, TN 37932 3. Parker-Hannifin Corp. Olive Branch, MI 38654 Abstract- A hybrid multilevel inverter inverter (one leg for each phase) and H-bridge in series with each inverter leg. The inverter can be used

Tolbert, Leon M.

477

Single-pulse Raman scattering studies of heterogeneous explosive materials  

SciTech Connect (OSTI)

Raman scattering from ambient and shock-loaded heterogeneous (compressed pure polycrystalline) explosive materials has been examined using single-pulse laser excitation. In the case of triamino-trinitrobenzene (TATB), intense nonlinear scattering at 1170 cm/sup -1/ has been observed.

Trott, W.M.; Renlund, A.M.

1985-05-15T23:59:59.000Z

478

Single Glucose Biofuel Cells Implanted in Rats Power Electronic Devices  

E-Print Network [OSTI]

Single Glucose Biofuel Cells Implanted in Rats Power Electronic Devices A. Zebda1,2 , S. Cosnier1 the first implanted glucose biofuel cell (GBFC) that is capable of generating sufficient power from a mammal further developments. Following recent developments in nano- and biotechnology, state-of-the-art biofuel

Boyer, Edmond

479

Photo- and Semi-conductance in Molecular Single Crystals  

Science Journals Connector (OSTI)

... (1) Photo-conductance1 in molecular single crystals of the anthracene type is not an effect due primarily ... anthracene type is not an effect due primarily to impurity centres, since the dependence of photo-conductance on wave-length reproduces all inflexions of the ultra-violet absorption curve of the ...

D. J. CARSWELL; J. FERGUSON; L. E. LYONS

1954-04-17T23:59:59.000Z

480

Single Molecule Study of Cellulase Hydrolysis of Crystalline Cellulose  

SciTech Connect (OSTI)

This report seeks to elucidate the role of cellobiohydrolase-I (CBH I) in the hydrolysis of crystalline cellulose. A single-molecule approach uses various imaging techniques to investigate the surface structure of crystalline cellulose and changes made in the structure by CBH I.

Liu, Y.-S.; Luo, Y.; Baker, J. O.; Zeng, Y.; Himmel, M. E.; Smith, S.; Ding, S.-Y.

2009-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "nanoclusters out-perform single" 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

Planning Single-arm Manipulations with N-Arm Robots  

E-Print Network [OSTI]

Planning Single-arm Manipulations with N-Arm Robots Benjamin Cohen bcohen@seas.upenn.edu University@cs.cmu.edu Carnegie Mellon University Abstract--Many robotic systems are comprised of two or more arms. Such systems robotic arms. While the use of multiple arms increases the pro- ductivity of the system and extends

Guestrin, Carlos

482

Giant Magnetic Anisotropy of Single Cobalt Atoms and  

E-Print Network [OSTI]

Giant Magnetic Anisotropy of Single Cobalt Atoms and Nanoparticles P. Gambardella,1,2 * S. Rusponi. Dederichs,5 K. Kern,1,2 C. Carbone,3,5 H. Brune1 The isotropic magnetic moment of a free atom is shown to develop giant magnetic anisotropy energy due to symmetry reduction at an atomically ordered surface

Brune, Harald

483

Imaging single atoms in a three-dimensional array  

E-Print Network [OSTI]

LETTERS Imaging single atoms in a three-dimensional array KARL D. NELSON, XIAO LI AND DAVID S atom trapped by light is a promising qubit. It has weak, well-understood interactions with the environment, its internal state can be precisely manipulated1 , interactions that entangle atoms can be varied

Loss, Daniel

484

Single atom identification by energy dispersive x-ray spectroscopy  

SciTech Connect (OSTI)

Using aberration-corrected scanning transmission electron microscope and energy dispersive x-ray spectroscopy, single, isolated impurity atoms of silicon and platinum in monolayer and multilayer graphene are identified. Simultaneously acquired electron energy loss spectra confirm the elemental identification. Contamination difficulties are overcome by employing near-UHV sample conditions. Signal intensities agree within a factor of two with standardless estimates.

Lovejoy, T. C.; Dellby, N.; Krivanek, O. L. [Nion, 1102 8th St., Kirkland, Washington 98033 (United States); Ramasse, Q. M. [SuperSTEM Laboratory, STFC Daresbury, Keckwick Lane, Daresbury WA4 4AD (United Kingdom); Falke, M.; Kaeppel, A.; Terborg, R. [Bruker Nano GmbH, Schwarzschildstr. 12, 12489 Berlin (Germany); Zan, R. [School of Physics and Astronomy, University of Manchester, Manchester M13 9PL (United Kingdom)

2012-04-09T23:59:59.000Z

485

Book review Light Scattering Reviews 4: Single Light Scattering and  

E-Print Network [OSTI]

-monograph on the use of space-time Green functions in the description of the diffusive radiation transport in active equation of the radiative transfer theory in the classical style of the ``Soviet'' school of radiativeBook review Light Scattering Reviews 4: Single Light Scattering and Radiative Transfer, A

486

Experimental investigation of single carbon compounds under hydrothermal conditions  

E-Print Network [OSTI]

Experimental investigation of single carbon compounds under hydrothermal conditions Jeffrey S; accepted in revised form 8 September 2005 Abstract The speciation of carbon in subseafloor hydrothermal reactant during the abiotic synthesis of reduced carbon compounds via Fischer­Tropsch-type processes

Rhoads, James

487

Hydrogen Production in a Single Chamber Microbial Electrolysis Cell  

E-Print Network [OSTI]

) at greater yields than fermentation and at greater energy efficiencies than water electrolysis. It has been to produce water. A microbial electrolysis cell (MEC) operates in a manner similar to an MFC exceptHydrogen Production in a Single Chamber Microbial Electrolysis Cell Lacking a Membrane D O U G L

488

Noise and Bandwidth Performance of Single-Molecule Biosensors  

E-Print Network [OSTI]

Noise and Bandwidth Performance of Single-Molecule Biosensors J. Rosenstein, S. Sorgenfrei, K. L and nanotube field-effect transistors offer different tradeoffs between bandwidth and noise levels. Here, we on force spectroscopy, such as optical tweezers [4] and atomic force microscopy [5]. New electrochemical

Shepard, Kenneth

489

Economics & Finance MA or BSc (Single Honours Degrees)  

E-Print Network [OSTI]

88 Economics & Finance MA or BSc (Single Honours Degrees) Applied Economics Economics Financial Economics BA (International Honours Degrees) Economics See page 13 MA or BSc (Joint Honours Degrees) Economics and one of: Management Mathematics MA (Joint Honours Degrees) Economics and one of: Ancient

Brierley, Andrew

490

Postdoc Position in Microfluidics and Single Cell Raman Spectroscopy  

E-Print Network [OSTI]

Postdoc Position in Microfluidics and Single Cell Raman Spectroscopy Department of Microbial and Environmental Microfluidics Group (http://web.mit.edu/romanstocker) Department of Civil & Environmental (junior or senior) with strong expertise in microfluidics and an interest in applying it to microbial

Horn, Matthias

491

Single Cell Analysis Using Microfluidics Coupled to Ultrasensitive Mass Spectrometry  

E-Print Network [OSTI]

Single Cell Analysis Using Microfluidics Coupled to Ultrasensitive Mass Spectrometry PI Ryan Kelly is to combine microfluidic sample preparation and separations with the ultrasensitive mass spectrometry (MS without the need for chemical labeling. We will combine our expertise in the fields of microfluidics

492

3D imaging and ranging by time-correlated single  

E-Print Network [OSTI]

3D imaging and ranging by time-correlated single photon counting by A. M. Wallace, 6. S. Buller and A. C. Walker 3D imaging is an important tool for metrology and reverse engineering of components and architecturalsurveying. In this article, we review briefly the principal methods in current use for 3D imaging

Buller, Gerald S.

493

Optimal Frequency for Plasma Heating with a Single Electrostatic Wave  

E-Print Network [OSTI]

for electrostatic ion cyclotron wave launching, and laser-induced fluorescence measurements were made of ion heating of the ion cyclotron frequency. The measurements revealed a dependence of heating on fre- quency as predictedOptimal Frequency for Plasma Heating with a Single Electrostatic Wave Benjamin Jorns and Edgar Y

Choueiri, Edgar

494

ccsd00001995, Plasma Production by Helicon Waves with Single  

E-Print Network [OSTI]

ccsd­00001995, version 1 ­ 20 Oct 2004 Plasma Production by Helicon Waves with Single Mode Number density (10 12 10 13 cm 3 ) is obtained with comparatively ease under a low gas pressure of a few hundreds commercially a disadvantage for operating helicon-wave plasma sources with the lower running cost

495

Colossal Absorption of Molecules Inside Single Terahertz Nanoantennas  

E-Print Network [OSTI]

Colossal Absorption of Molecules Inside Single Terahertz Nanoantennas Hyeong-Ryeol Park, Kwang Jun: Molecules have extremely small absorption cross sections in the terahertz range even under resonant to be enhanced by >103 accompanied by a colossal absorption coefficient of 170 000 cm-1 . Tens of nanograms

Park, Namkyoo

496

Single molecule microscopy in 3D cell cultures and tissues  

Science Journals Connector (OSTI)

Abstract From the onset of the first microscopic visualization of single fluorescent molecules in living cells at the beginning of this century, to the present, almost routine application of single molecule microscopy, the method has well-proven its ability to contribute unmatched detailed insight into the heterogeneous and dynamic molecular world life is composed of. Except for investigations on bacteria and yeast, almost the entire story of success is based on studies on adherent mammalian 2D cell cultures. However, despite this continuous progress, the technique was not able to keep pace with the move of the cell biology community to adapt 3D cell culture models for basic research, regenerative medicine, or drug development and screening. In this review, we will summarize the progress, which only recently allowed for the application of single molecule microscopy to 3D cell systems and give an overview of the technical advances that led to it. While initially posing a challenge, we finally conclude that relevant 3D cell models will become an integral part of the on-going success of single molecule microscopy.

Florian M. Lauer; Elke Kaemmerer; Tobias Meckel

2014-01-01T23:59:59.000Z

497

Strong extinction of a laser beam by a single molecule  

E-Print Network [OSTI]

We present an experiment where a single molecule strongly affects the amplitude and phase of a laser field emerging from a subwavelength aperture. We achieve a visibility of -6% in direct and +10% in cross-polarized detection schemes. Our analysis shows that a close to full extinction should be possible using near-field excitation.

I. Gerhardt; G. Wrigge; P. Bushev; G. Zumofen; R. Pfab; V. Sandoghdar

2006-04-24T23:59:59.000Z

498

Single-molecule orientational wave packet in ultrafast optical polarization  

SciTech Connect (OSTI)

The explicit derivation of the ultrafast optical polarization of a single molecule is presented. It is shown that an orientational wave packet carried by the excited molecular electron can provide a sharp definition for the space configuration of the laser-molecule interaction.

Mainos, C. [Laboratoire de Physique des Lasers, Universite Paris 13 Av. J.B. Clement, 93430 Villetaneuse (France)

2006-09-15T23:59:59.000Z

499

Single-mode nonclassicality criteria via Holstein-Primakoff transformation  

E-Print Network [OSTI]

Recently, two quantifications for nonclassicality of a single-mode field are shown to be equivalent; (i) the rank of entanglement it can generate by a beam-splitter and (ii) the number of terms needed to expand it as superposition of coherent states. We show that nonclassicality criteria can be obtained with an alternative approach. The rank of two-mode entanglement among 2-level identical particles converges to the rank of single-mode nonclassicality within the Holstein-Primakoff transformation, at the large particle number limit. In particular, we show that the entanglement criterion of Hillery & Zubairy converges to the Mandel's $Q$-parameter which is used to reveal nonclassicality, and spin-squeezing criterion of S{\\o}rensen et al. converges to single-mode squeezing condition. We obtain additional nonclassicality criteria not existing in the literature. We also discuss if single-mode nonclassicality can be visualized as the entanglement of space generating the photons. Moreover, in a forthcoming study...

Tasgin, Mehmet Emre

2015-01-01T23:59:59.000Z

500

MODELING STUDY OF A SINGLE-WELL ENHANCED  

E-Print Network [OSTI]

energy sources has to be achieved through technological advances to make them cost efficient. FromMODELING STUDY OF A SINGLE-WELL ENHANCED GEOTHERMAL SYSTEM (EGS) A REPORT SUBMITTED TO THE DEPARTMENT OF ENERGY RESOURCES ENGINEERING OF STANFORD UNIVERSITY IN PARTIAL FULFILLMENT OF THE REQUIREMENTS

Stanford University