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Topic Area: Nanostructured Materials
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Displaying records 31 to 40 of 41 records.
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31. Origin of Universal Optical Conductivity and Optical Stacking Sequence Identification in Multilayer Graphene
Topic: Nanostructured Materials
Published: 8/6/2009
Authors: Hongki Min, Allan H. MacDonald
Abstract: We predict that the optical conductivity of normal graphene multilayers is close to {sigma}^duni^=({pi}/2) e^u2^/h per layer over a broad range of frequencies. The origin of this behavior is an emergent chiral symmetry which is present in normal N-l ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902107

32. Silicon Carbide Nanostructures: A Tight Binding Approach
Topic: Nanostructured Materials
Published: 6/28/2009
Authors: Anthony D. Patrick, Xiao Dong, Thomas C Allison, Estela Blaisten-Barojas
Abstract: A tight-binding model Hamiltonian is newly parametrized for silicon carbide based on fits to a database of energy points calculated within the density functional theory approach of the electronic energy surfaces of nanoclusters and the total en ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904026

33. Nanoparticle assembly, DNA provides control
Topic: Nanostructured Materials
Published: 5/1/2009
Authors: Vivek M Prabhu, Steven D Hudson
Abstract: No abstract this is a Nature Materials News and Views (less than 800 word) article.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902344

34. Comparison of Steric Effects in the Modeling of Spheres and Rodlike Particles in Field-Flow Fractionation (FFF)
Topic: Nanostructured Materials
Published: 2/27/2009
Authors: Frederick R Phelan Jr, Barry J. Bauer
Abstract: The elution of spheres and rods in field-flow fractionation is studied using a Brownian dynamics method. The particle motions for spheres are governed by a familiar Langevin equation which models drag force and diffusion. The rods are modeled as prol ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852788

35. Transmission electron microscopy characterization of colloidal copper nanoparticles and their chemical reactivity
Topic: Nanostructured Materials
Published: 2/16/2009
Authors: Guangjun Cheng, Angela R Hight Walker
Abstract: A colloidal synthesis route was developed to produce face-centered cubic (fcc) copper (Cu) nanoparticles in the presence of the surfactants in an organic solvent under an argon environment. Various synthetic conditions have been explored to control t ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903450

36. Simulation of Nanotube Separation in Field-Flow Fractionation (FFF)
Topic: Nanostructured Materials
Published: 4/27/2007
Authors: Frederick R Phelan Jr, Barry J. Bauer
Abstract: A Brownian dynamics simulation of prolate ellipsoidal particles is developed to investigate the separation of nanotubes in flow-FFF. The particle motions are governed by stochastic forms of a linear momentum balance with orientation dependent drag an ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852686

37. Characterization and Surface-Reactivity of Nanocrystalline Anatase in Aqueous Solutions
Topic: Nanostructured Materials
Published: 12/19/2006
Authors: Moira K Ridley, Vincent A Hackley, Michael L Machesky
Abstract: The chemical and electrostatic interactions at mineral- water interfaces are of fundamental importance in many geochemical, materials science, and technological processes; however, the effects of particle size at the nanoscale on these interactions a ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854317

38. Structure Development in Aerogel-Processed Nanocrystalline Alkaline-Earth Oxides as Revealed by SANS
Topic: Nanostructured Materials
Published: 8/1/2005
Authors: Vincent A Hackley, P K Stoimenov, D L Ho, Li Piin Sung, K J Klabunde
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850837

39. Rheological and Electrokinetic Behavior Associated with Concentrated Nanosize Silica Hydrosols
Topic: Nanostructured Materials
Published: 5/1/2005
Authors: J Y Kim, U Paik, Vincent A Hackley
Abstract: We report that concentrated fumed silica nanosols exhibit anomalous rheology with regards to predictions based on DLVO theory. Despite a high electrokinetic potential at pH 8, fumed silica not only exhibits rheologicl behavior normally indicative of ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850762

40. Ferroelectric Phase Transitions in Nano-Scale Chemically Ordered PbSc^d0.5^Nb^d0.5^O^d3^ Using a First-Principles Model Hamiltonian
Topic: Nanostructured Materials
Published: 7/1/2003
Authors: U Waghmare, Eric J Cockayne, Benjamin P Burton
Abstract: fects of chemical order, disorder, short range order, and anti-phase boundaries on phase transitions and dielectric properties of PBSc^d1/2^Nb^d1/2^O^d3^ are studied through molecular dynamics simulations of a FP model. Simulations of large systems ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850670



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