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NIST Authors in Bold

Displaying 1251 - 1275 of 1909

Particle Motion During the Compaction of Granular Matter

December 19, 2008
Author(s)
Steven Slotterback, Masahiro Toiya, Leonard Goff, Jack F. Douglas, Wolfgang Losert
We track particle motions in a granular material subjected to compaction using a laser scattering based imaging method where compaction is achieved through thermal cycling. Particle displacements in this jammed fluid correlate strongly with rearrangments

Elastic Modulus of Faceted Aluminum Nitride Nanotubes Measured by Contact Resonance Atomic Force Microscopy

December 17, 2008
Author(s)
Gheorghe Stan, C Ciobanu, Timothy Thayer, George Wang, Randall Creighton, Premsagar P. Kavuri, Leonid A. Bendersky, Robert F. Cook
A new methodology for determining the radial elastic modulus of a one-dimensional nanostructure laid on a substrate has been developed. The methodology consists of the combination of contact resonance atomic force microscopy (AFM) with finite element

Technique for Monitoring Environmentally Induced Changes in Polymeric Sealants

December 17, 2008
Author(s)
Donald L. Hunston, Kar T. Tan, Christopher C. White
A new procedure was developed to utilize stress relaxation tests to monitor damage induced in sealant materials exposed to environmental variables and changing strains. By combining tension and compression tests, it was possible to monitor both molecular

Disordered Nanoparticle Interfaces for Defect-Tolerant Self-Assembly

November 17, 2008
Author(s)
Kevin G. Yager, Brian Berry, Kirt A. Page, Derek L. Patton, Alamgir Karim, Eric J. Amis
Self-assembly is a promising route for controlling the nanoscale structure and material properties of coatings, yet it remains difficult to control the microstructure of these systems. In particular, self-assembling materials typically have complex and

Preparation and Characterization of Patchy Particles

November 14, 2008
Author(s)
Thuy Chastek, Steven D. Hudson, Vincent A. Hackley
The self-assembled organization of partilces depends on the symmetry of their interactions, and strides are being made in producing nanoaparticles of controlled shape and functionalization. This paper describes the use of particles adsorption to control

Centrifugal Length Separation of Carbon Nanotubes

October 1, 2008
Author(s)
Jeffrey A. Fagan, Matthew Becker, Jae H. Chun, Barry J. Bauer, Jeffrey R. Simpson, Angela R. Hight Walker, Erik K. Hobbie
Separation of single wall carbon nanotubes (SWCNTs) by length via centrifugation in a high density medium, and the characterization of both the separated fractions and the centrifugation process are presented. Significant quantities of the separated SWCNTs

Quantifying Changes in the Fast Dynamics of Mixtures by Dielectric Spectroscopy

September 26, 2008
Author(s)
Tatiana Psurek, Christopher L. Soles, Kirt A. Page, Marcus T. Cicerone, Jack F. Douglas
The addition of a solvent or nanoparticles to a polymeric material can lead toappreciable changes in the rates of relaxation and reaction that can profoundly alter material properties and function. We introduce a general theoretical strategy for
Displaying 1251 - 1275 of 1909
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