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NIST Authors in Bold

Displaying 576 - 600 of 882

Flexure-induced structural and electronic changes in polymer supported membranes of length purified single-wall carbon nanotubes

February 22, 2011
Author(s)
John M. Harris, Ganjigunte R. Iyer, Daneesh O. Simien, Jeffrey Fagan, JiYeon Huh, Jun Y. Chung, Steven Hudson, Jan Obrzut, Jack F. Douglas, Christopher Stafford, Erik K. Hobbie
Thin membranes of length purified single-wall carbon nanotubes (SWCNTs) are uniaxially compressed by depositing them on prestretched polymer substrates. Upon release of the strain, the topography, microstructure and conductivity of the films are

New Research in Nanotechnology - Nanotechnology Science and Technology Series

February 19, 2011
Author(s)
Michael T. Postek, Joseph J. Kopanski, David A. Wollman
NIST is developing a broad range of nanometrology (measurements) and nanomanufacturing techniques necessary for the successful commercialization of nanotechnology. This book is a compilation of a number of selected NIST accomplishments in nanotechnology

Tranmission Electron Microscopy with a Liquid Flow Cell

January 20, 2011
Author(s)
Kate L. Klein, Ian M. Anderson, N. de Jonge
The imaging of microscopic structures at nanometer-scale spatial resolution in a liquid environment is of interest for a wide range of studies. Transmission electron microscopy (TEM) provides a method for imaging with the requisite spatial resolution, but

Simulation of lattice strain due to CNT-metal interface

January 17, 2011
Author(s)
Alexander Y. Smolyanitsky, Vinod K. Tewary
We report an atomistic molecular statics study of strains in single wall carbon nanotubes (SWCNTs) interfaced with a planar nickel surface. We calculate axial and radial strain distributions along the SWCNT axis. We demonstrate strains of up to 2%

Analysis of high-Q, gallium nitride nanowire resonators in response to deposited thin films

January 1, 2011
Author(s)
J. R. Montague, M. Dalberth, J. M. Gray, D. Seghete, Kristine A. Bertness, S M. George, Victor M. Bright, Charles T. Rogers, Norman Sanford
Gallium nitride nanowires (GaN-NWs) are systems of interest for mechanical resonance-based sensors due to their small mass and, in the case of c-axis NWs, high mechanical quality (Q) factors of 10,000-100,000. We report on singly-clamped NW mechanical

Influence of Polyethyleneimine Graftings of Multi-Walled Carbon Nanotubes on Their Accumulation and Elimination by and Toxicity to Daphnia magna

December 23, 2010
Author(s)
Elijah J. Petersen, Roger A. Pinto, Danielle J. Mai, Peter E. Landrum, Walter J. Weber
Carbon nanotubes (CNTs) are often modified for different intended applications which often changes the nanotubes’ physicochemical properties, such as surface charge. Assessing the extent to which such modifications to carbon nanotubes influence their

Zone-Refinement Effect in Small Molecule-Polymer Blend Semiconductors for Organic Thin Film Transistors

December 14, 2010
Author(s)
Yeon Sook Chung, Nayool Shin, Jihoon Kang, Youngeun Jo, Vivek Prabhu, Regis J. Kline, John E. Anthony, Do Y. Yoon
The blend films of small molecule semiconductors with insulating polymers exhibit not only an excellent solution processability, but also superior performance characteristics (field-effect mobility, on/off ratio, threshold voltage and stability) over those

The Effect of Substrate Material on Silver Nanoparticle Antimicrobial Efficacy

December 1, 2010
Author(s)
Benita Dair, Dave M. Saylor, T. E. Cargal, Grace R. French, Kristen M. Kennedy, Rachel S. Casas, Jonathan E. Guyer, James A. Warren, Steven K. Pollack
With the advent of Nanotechnology, silver nanoparticles increasingly are being used in coatings, especially in medical device applications, to capitalize on their antimicrobial properties. The increased antimicrobial efficacy of nanoparticulate silver

Broadband Measurements of Nanofiber Devices: Repeatability and Random Error Analysis

November 30, 2010
Author(s)
Thomas M. Wallis, Atif A. Imtiaz, SangHyun S. Lim, Pavel Kabos, Kichul Kim, Paul Rice, Dejan Filipovic
On-wafer, broadband measurements of two-port nanofiber devices were made in order to test the short-term repeatability of a widely used measurement approach that builds on established on-wafer calibration techniques. The test devices used in this study

Thickness dependence of the elastic modulus of tri (8-hydroxyquinolinato) aluminum (III)

November 2, 2010
Author(s)
Jessica M. Torres, Nathan Bakken, Christopher Stafford, Jian Li, Bryan D. Vogt
The intrinsic flexibility of organic molecules has been suggested to enable bendable electronics in comparison to their stiffer, inorganic counterparts. However, very little is known regarding the mechanical properties of these conjugated molecular glasses
Displaying 576 - 600 of 882