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Topic Area: Characterization, Nanometrology, and Nanoscale Measurements

Displaying records 61 to 70 of 211 records.
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61. Experimental Evidence for s-Wave Pairing Symmetry in Superconducting Cu_{x}Bi_{2}Se_{3} Single Crystals Using a Scanning Tunneling Microscope
Topic: Characterization, Nanometrology, and Nanoscale Measurements
Published: 3/12/2013
Authors: Niv Levy, Tong Zhang, Jeonghoon Ha, Fred Sharifi, Alec Talin, Young Kuk, Joseph A Stroscio
Abstract: Topological superconductors (TS) are a newly predicted phase of matter which is topologically distinct from conventional superconducting condensates of Cooper pairs. As a manifestation of its topological character, TS supports massless itinerant quas ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912712

62. Scanning Tunneling Microscopy of Gate Tunable Topological Insulator Bi2Se3 Thin Films
Topic: Characterization, Nanometrology, and Nanoscale Measurements
Published: 3/12/2013
Authors: Tong Zhang, Niv Levy, Jeonghoon Ha, Young Kuk, Joseph A Stroscio
Abstract: Electrical field control of the carrier density of topological insulators (TI) has greatly expanded the possible practical use of these materials. However, the combination of low temperature local probe studies and a gate tunable TI device remains c ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913044

63. Real-Time Size Discrimination and Elemental Analysis of Gold Nanoparticles using ES-DMA coupled to ICP-MS
Topic: Characterization, Nanometrology, and Nanoscale Measurements
Published: 1/22/2013
Authors: Sherrie R. Elzey, De-Hao D. Tsai, Lee Lijian Yu, Michael R Winchester, Michael E Kelley, Vincent A Hackley
Abstract: We report the development of a hyphenated instrument with the capacity to quantitatively characterize aqueous suspended gold nanoparticles (AuNPs) based on a combination of gas-phase size separation, particle counting, and elemental analysis. A custo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912171

64. Differentiation and characterization of isotopically modified silver nanoparticles in aqueous media using asymmetric-flow field flow fractionation coupled to optical detection and mass spectrometry
Topic: Characterization, Nanometrology, and Nanoscale Measurements
Published: 12/10/2012
Authors: Julien C. Gigault, Vincent A Hackley
Abstract: The principal objective of this work was to develop and demonstrate a new methodology for silver nanoparticle (AgNP) detection and characterization based on asymmetric-flow field flow fractionation (A4F) coupled to multiple detectors and using stable ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912174

65. Gold nanorod separation and characterization by asymmetric-flow field flow fractionation with UV-Vis detection
Topic: Characterization, Nanometrology, and Nanoscale Measurements
Published: 11/14/2012
Authors: Julien C. Gigault, Tae Joon Cho, Robert I. MacCuspie, Vincent A Hackley
Abstract: The application of asymmetrical-flow field flow fractionation (A4F) for gold nanorod (GNR) fractionation and characterization was comprehensively investigated. We report on two novel aspects of this application. The first addresses the analytical cha ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911860

66. Nanoscale Reference Materials for Environmental, Health, and Safety Measurements: Needs, Gaps, and Opportunities
Topic: Characterization, Nanometrology, and Nanoscale Measurements
Published: 11/7/2012
Authors: Aleksandr B. Stefaniak, Vincent A Hackley, Gert Roebben, Kensei Ehara, Steve Hankin, Michael T Postek, Iseult Lynch, Wei-En Fu, Thomas P.J. Linsinger, Andreas Th?nemann
Abstract: There is a need to understand and manage potential risks posed to workers, the public, and the environment from exposure to engineered nanomaterials. In response, several organizations have developed lists of relevant nano-objects and of physico-che ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910519

67. Quantifying Dithiothreitol Displacement of Functional Ligands from Gold Nanoparticles
Topic: Characterization, Nanometrology, and Nanoscale Measurements
Published: 10/27/2012
Authors: De-Hao D. Tsai, Frank W DelRio, Sherrie R. Elzey, Suvajyoti S. Guha, Michael Russel Zachariah, Vincent A Hackley, Melanie P Shelton
Abstract: Dithiothreitol (DTT)-based displacement is widely utilized for separating ligands from their gold nanoparticle (AuNP) conjugates, a critical step for differentiating and quantifying surface-bound functional ligands and therefore the effective surface ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911354

68. Temperature-dependent mechanical-resonance frequencies and damping in ensembles of gallium nitride nanowires
Topic: Characterization, Nanometrology, and Nanoscale Measurements
Published: 10/22/2012
Authors: Kristine A Bertness, Norman A Sanford, J. R. Montague, H.S. Park, Victor M. Bright, C. T. Rogers
Abstract: We have measured singly clamped cantilever mechanical-resonances in ensembles of as-grown gallium nitridenanowires (GaN NWs), from 12 K to 320 K. Resonance frequencies are approximately linearly dependent on temperature near 300 K ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910038

69. Aggregation/agglomeration state of carbon nanotubes
Topic: Characterization, Nanometrology, and Nanoscale Measurements
Published: 10/12/2012
Authors: Vivek M Prabhu, Toshiya Okazaki, Takeshi Eitoku, Masayoshi Tange, Haruhisa Kato
Abstract: Evaluation of aggregation and agglomeration of carbon nanotube (CNT) solution has been one of the key issues for applications. Here we introduce a simple method based on depolarized dynamic light scattering (DDLS) performed at multiple scattering ang ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912177

70. MEMS Kinematics by Super-Resolution Fluorescence Microscopy
Topic: Characterization, Nanometrology, and Nanoscale Measurements
Published: 9/27/2012
Authors: Craig Dyer McGray, Samuel M Stavis, Joshua Giltinan, Eric Eastman, Samara L. Firebaugh, Jenelle Piepmeier, Jon C Geist, Michael Gaitan
Abstract: Super-resolution fluorescence microscopy is used for the first time to study the nanoscale kinematics of a MEMS device in motion across a surface. A device under test is labeled with fluorescent nanoparticles that form a microscale constellation of n ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910908



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