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Topic Area: Nanomaterials

Displaying records 91 to 100 of 151 records.
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91. 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 ...

92. 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 ...

93. 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 ...

94. 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.

95. 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 ...

96. 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 ...

97. 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 ...

98. 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 ...

99. Singularity in the Debye-Waller factor of graphene
Topic: Nanomaterials
Published: 3/16/2009
Authors: Vinod K Tewary, B. Yang
Abstract: It is shown that the Debye-Waller factor for graphene has a singularity. However, the singularity does not affect the zero-temperature value of the Debye-Waller factor. We calculate the zero-temperature limit of the mean-square displacement separate ...

100. A Fiber-Optic Interferometer with Sub-Picometer Resolution for DC and Low-Frequency Displacement Measurement
Topic: Nanomaterials
Published: 3/13/2009
Authors: Douglas T Smith, Jon Robert Pratt, L Howard
Abstract: We have developed a fiber-optic interferometer optimized for best performance in the frequency range from DC to 1 kHz, with displacement linearity of 1 % over a range of ± 25 nm, and noise-limited resolution of 2 pm. The interferometer uses a tunabl ...

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