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Topic Area: Nanomaterials
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Displaying records 91 to 100 of 153 records.
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91. Origin of Universal Optical Conductivity and Optical Stacking Sequence Identification in Multilayer Graphene
Topic: Nanomaterials
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

92. Depressed Phase Transition in Solution-Grown VO2 Nanostructures
Topic: Nanomaterials
Published: 7/1/2009
Authors: Daniel A Fischer, Luisa Whittaker, Cherno Jaye, Zugen Fu, Sarbajit Banerjee
Abstract: The first-order metal insulator phase transition in VO2 is characterized by an ultrafast several orders of magnitude change in electrical conductivity and optical transmittance, which makes this material an attractive candidate for the fabrication of ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902385

93. Asphaltene Adsorption onto Self-Assembled Monolayers of Mixed Aromatic and Aliphatic Trichlorosilanes
Topic: Nanomaterials
Published: 6/2/2009
Authors: Daniel A Fischer, Saloman Turgman-Cohen, Mathew Smith, P K Kilpatrick, Jan Genzer
Abstract: The adsorption of asphaltenes onto flat solid surfaces modified with mixed self-assembled monolayers (SAMs) of aliphatic and aromatic trichlorosilanes with varying wettabilities, aromaticities, and thicknesses is tested. The mixed SAMs are characte ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902377

94. Modification of PET surfaces with self-assembled monolayers of organosilane precursors
Topic: Nanomaterials
Published: 5/13/2009
Authors: Daniel A Fischer, Ali Ozcam, Kirill Effimenko, Cherno Jaye, Richard Spontak, Jan Genzer
Abstract: We report on a facile, robust and rapid method by which poly(ethylene terephthalate) (PET) surfaces can be chemically modified while avoiding chemical degradation. Specifically, we demonstrate that brief exposure of PET surfaces to ultraviolet/ozone ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901679

95. Near Edge X-Ray Absorption Fine Structure Spectroscopy Studies of Single-Crystalline V2O5 Nanowire Arrays
Topic: Nanomaterials
Published: 5/7/2009
Authors: Daniel A Fischer, J Velasquez, Cherno Jaye, S Banerjee
Abstract: Near edge X-ray absorption fine structure (NEXAFS) spectroscopy is used to precisely probe the alignment, uniformity in crystal growth direction, and electronic structure of single-crystalline V2O5 nanowire arrays prepared by a cobalt-catalyzed vapor ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902379

96. Nanoparticle assembly, DNA provides control
Topic: Nanomaterials
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

97. In-plane bias in a patterned ferromagnetic/antiferromagnetic bilayer
Topic: Nanomaterials
Published: 4/30/2009
Authors: Yury P. Kabanov, Valerian I. Nikitenko, Oleg A. Tikhomirov, William F. Egelhoff Jr., Alexander J. Shapiro, Robert D Shull
Abstract: Exchange bias in bi- and multilayer magnetic systems is usually ascribed to the existence of transient magnetic structures at the interfaces between adjacent layers. Here, we report the observation of a similar phenomenon in the lateral direction, in ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854169

98. Characterizing the Dynamic Behavior of Nano-TiO2 Agglomerates in Suspensions by Photocorrelation Spectroscopy
Topic: Nanomaterials
Published: 4/22/2009
Authors: I-Hsiang Tseng, Stephanie S Watson, Li Piin Sung
Abstract: Metal oxide nanoparticles are small but easily form agglomerates in suspension, depending on the strength of particle-particle and particle-media interactions. To understand the agglomeration behavior of nanoparticles in media and relate to it to pro ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902458

99. Elastic and adhesive properties of alkanethiol self-assembled monolayers on gold
Topic: Nanomaterials
Published: 3/30/2009
Authors: Frank W DelRio, Cherno Jaye, Daniel A Fischer, Robert Francis Cook
Abstract: Elastic and adhesive properties of alkanethiol (CH3(CH2)n 1SH) self-assembled monolayers on gold are investigated by atomic force microscopy and correlated with surface structure via near edge x-ray absorption fine structure spectroscopy. As the cha ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901545

100. Transparency and conductivity of carbon nanotube networks
Topic: Nanomaterials
Published: 3/18/2009
Author: Jan Obrzut
Abstract: The conductivity of films made of nanotubes longer than 200 nm closely follows the percolation theory for two-dimensional (2D) networks. The scaling universal exponents describing the percolation transition from an insulating to conducting state with ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901076



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