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Displaying records 111 to 120 of 158 records.
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111. 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 ...

112. 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 ...

113. 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 ...

114. 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 ...

Topic: Nanomaterials
Published: 11/14/2008
Authors: Jan Obrzut, Jack F Douglas
Abstract: We measured the complex conductivity of carbon nanotube-polypropylene composites under mechanical shear conditions. In order to determine how flow alters the properties of these complex fluids we constructed a rheo-dielectric test fixture, which allo ...

116. Preparation and Characterization of Patchy Particles
Topic: Nanomaterials
Published: 11/14/2008
Authors: Thuy Chastek, Steven D Hudson, Vincent A Hackley
Abstract: 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 cont ...

117. Workshop on Measurement Needs for Local-Structure Determination in Inorganic Materials
Topic: Nanomaterials
Published: 11/8/2008
Authors: Igor Levin, Terrell A Vanderah
Abstract: The functional responses (e.g. dielectric, magnetic, catalytic, etc) of many industrially-relevant materials are controlled by their local structure a term that refers to the atomic arrangements on a scale ranging from atomic (sub-nanometer) to sev ...

118. Neutron Scattering Study of the Structural Change Induced by Photopolymerization of AOT/D2O/Dodecyl Acrylate Inverse Microemulsions
Topic: Nanomaterials
Published: 11/4/2008
Authors: Kirt Anthony Page, Jolanta Marszalek, John Pojman
Abstract: SANS/USANS measurements were used to determine the structural changes induced by photopolymerization of AOT/D2O/(Dodecyl Acrylate) inverse microemulsion systems.  Scattering profiles were collected for the initial microemulsions and the films resulti ...

119. Centrifugal Length Separation of Carbon Nanotubes
Topic: Nanomaterials
Published: 10/1/2008
Authors: Jeffrey A Fagan, Matthew Becker, Jae H. Chun, Barry J. Bauer, Jeffrey Ray Simpson, Angela R Hight Walker, Erik K. Hobbie
Abstract: 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 ...

120. Piezoelectric Response of Nanoscale PbTiO3 in Composite PbTiO3-CoFe2O4 Epitaxial Films
Topic: Nanomaterials
Published: 8/15/2008
Authors: Igor Levin, Tan Zhuopeng, Alexander Roytburd, Katyayani Seal, Brian Rodriguez, Stephen Jesse, Sergei Kalinin, Art Baddorf
Abstract: Piezoelectric properties of PbTiO3 in 1/3PbTiO3-2/3CoFe2O4 transverse epitaxial nanostructures on differently oriented SrTiO3 were analyzed using conventional and switching-spectroscopy piezoelectric force microscopy. The results confirmed that the ...

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