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Topic Area: Characterization, Nanometrology, and Nanoscale Measurements

Displaying records 51 to 60 of 195 records.
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51. 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

52. 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

53. 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

54. MEMS Kinematics by Super-Resolution Fluorescence Microscopy
Topic: Characterization, Nanometrology, and Nanoscale Measurements
Published: 9/28/2012
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

55. UV-induced photochemical transformations of citrate capped silver nanoparticle suspensions
Topic: Characterization, Nanometrology, and Nanoscale Measurements
Published: 9/14/2012
Authors: Justin M Gorham, Robert I. MacCuspie, Kate L Klein, D Howard Fairbrother, Richard D Holbrook
Abstract: Due to the increasing use of silver nanoparticles (AgNPs) in consumer products, it is essential to understand how variables, such as light exposure, may change the physical and chemical characteristics of AgNP suspensions. To this end, the effect o ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911250

56. Renormalization of the graphene dispersion velocity determined from scanning tunneling spectroscopy
Topic: Characterization, Nanometrology, and Nanoscale Measurements
Published: 9/11/2012
Authors: Joseph A Stroscio, Jungseok Chae, Nikolai B Zhitenev, Suyong Jung, Andrea F. Young, Cory Dean, Yuanda Gao, Kenji Watanabe, Takashi Taniguchi, James Hone, Kenneth L. Shepard, Philip Kim, Lei Wang
Abstract: In most metals, electrons behave as non-interacting quasiparticles with renormalized dynamical properties in the presence of electron interactions. Historically, many measurements are capable to probe the effect of interactions at the Fermi energy. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911329

57. Evaluation of viability and proliferation profiles on macrophages treated with silica nanoparticles in vitro via plate-based, flow cytometry, and Coulter counter assays
Topic: Characterization, Nanometrology, and Nanoscale Measurements
Published: 9/3/2012
Authors: Simona Bancos, De-Hao D. Tsai, Vincent A Hackley, J L Weaver, Katherine M Tyner
Abstract: Nanoparticles (NPs) are known to interfere with many high throughput cell viability and cell proliferation assays, which complicates the assessment of their potential toxic effects. The aim of this study was to compare viability and proliferation res ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911765

58. Disentangling the effects of polymer coatings on silver nanoparticle agglomeration, dissolution, and toxicity to determine mechanisms of nanotoxicity
Topic: Characterization, Nanometrology, and Nanoscale Measurements
Published: 9/1/2012
Authors: Justin M Zook, Melissa Danielle Halter, Danielle Cleveland, Stephen E Long
Abstract: Silver nanoparticles (AgNPs) are frequently coated by a variety of polymers, which may affect various intertwined mechanisms of toxicity, including agglomeration and dissolution rate. Here, we measure how citrate, dextran, poly(ethylene glycol) (PEG ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908497

59. Radio-microanalytical particle measurements method and application to Fukushima aerosols collected in Japan
Topic: Characterization, Nanometrology, and Nanoscale Measurements
Published: 8/26/2012
Authors: Cynthia J Zeissler, Lawrence Forsley, Richard Mark Lindstrom, Sean Newsome, Adrean Kirk, P.A. Mosier-Boss
Abstract: A nondestructive analytical method based on autoradiography and gamma spectrometry was developed to perform activity distribution analysis for particulate samples. This was applied to aerosols collected in Fukushima Japan, 40 km north of the Daiich ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911065

60. Summary Report of Research on TiO2 Nanomaterial
Topic: Characterization, Nanometrology, and Nanoscale Measurements
Published: 8/3/2012
Author: Vincent A Hackley
Abstract: Report summarizes study whose purpose was to optimize and validate a standardized and reproducible approach for the preparation of TiO2 nanoparticle dispersions in relevant biological and environmental test media, using an industrially relevant powde ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912219



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