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Topic Area: Nanomaterials

Displaying records 101 to 110 of 154 records.
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101. 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 ...

102. 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 ...

103. 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 ...

104. A parametric interatomic potential for graphene
Topic: Nanomaterials
Published: 2/27/2009
Authors: Vinod K Tewary, B. Yang
Abstract: A parametric interatomic potential is constructed for graphene. The potential energy consists of two parts: bond energy and radial interaction energy. The bond energy part is a generalized version of the Tersoff-Brenner potential. It includes angula ...

105. Analysis of Copper incorporation in Zno Nanowires
Topic: Nanomaterials
Published: 1/12/2009
Authors: Susie Eustis, Douglas C Meier, M R. Beversluis, Babak Nikoobakht

106. Inducing analytical orthogonality in tungsten oxide-based microsensors using materials structure and dynamic temperature control
Topic: Nanomaterials
Published: 1/4/2009
Authors: Kurt D Benkstein, Baranidharan Raman, David L. Lahr, John E Bonevich, Stephen Semancik

107. Elastic Modulus of Faceted Aluminum Nitride Nanotubes Measured by Contact Resonance Atomic Force Microscopy
Topic: Nanomaterials
Published: 12/17/2008
Authors: Gheorghe Stan, C Ciobanu, Timothy Thayer, George Wang, Randall Creighton, Premsagar Purushotham Kavuri, Leonid A Bendersky, Robert Francis Cook
Abstract: 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 ...

108. Self Assembly of Highly Ordered Nanowires in Biological Suspensions of Single-Wall Carbon Nanotubes
Topic: Nanomaterials
Published: 12/16/2008
Authors: Erik K. Hobbie, Jeffrey A Fagan, Matthew Becker, Steven D Hudson
Abstract: We demonstrate the directed self-assembly of highly-ordered nanowires of single-wall carbon nanotubes (SWNTs) in aqueous biological suspensions. Macroscopically straight and nearly-periodic linear arrangements of well-aligned individual SWNTs are fou ...

109. A Scalable Platform for Integrating Horizontal Nanochannels with Known Registries to Microchannels
Topic: Nanomaterials
Published: 12/8/2008
Author: Babak Nikoobakht
Abstract: A new method for in-situ fabrication of nanochannels is developed which allows adjusting their average pore size to an unprecedented range of 5 nm to 20 nm. It is shown that nanochannels with different but controlled pore sizes are selectively fab ...

110. Nanoscale thermal mechanical probe determination of softening transitions in thin polymer films
Topic: Nanomaterials
Published: 11/19/2008
Authors: Jing N. Zhou, Jack F Douglas, Alamgir Karim, Chad R Snyder, Christopher L Soles, Brian Berry
Abstract: We report a quantitative study of softening behavior of glassy polystyrene (PS) films at the 100 nm length scales using nano-thermomechanometry (nano-TM), an emerging scanning probe technique where a highly-doped silicon AFM tip is resistively heated ...

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