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Displaying 1851 - 1875 of 3718

Quantitative Determination of Competitive Molecular Adsorption on Gold Nanoparticles Using Attenuated Total Reflectance-Fourier Transform Infrared Spectroscopy

June 28, 2011
Author(s)
De-Hao D. Tsai, Melissa Davila-Morris, Frank W. DelRio, Suvajyoti S. Guha, Vincent A. Hackley, Michael R. Zachariah
Surface-sensitive quantitative studies of competitive molecular adsorption on nanoparticles were conducted using a modified Attenuated attenuated Total total Reflectionreflectance-Fourier Transform transform Infrared infrared (ATR-FTIR) spectroscopy method

Time-resolved photoluminescence of lithographically defined quantum dots fabricated by electron beam lithography and wet chemical etching

June 15, 2011
Author(s)
Varun B. Verma, Martin J. Stevens, Kevin L. Silverman, Neville Dias, Akash Garg, James J. Coleman, Richard P. Mirin
We measure the time-resolved photoluminescence characteristics of a novel type of lithographically patterned quantum dot fabricated by electron beam lithography, wet chemical etching, and overgrowth of the barrier layers by metalorganic chemical vapor

Statistical analysis of fiber gripping effects on Kolsky bar test

June 14, 2011
Author(s)
Jae Hyun Kim, Nathanael A. Heckert, Stefan D. Leigh, Haruki Kobayashi, Walter G. McDonough, Richard L. Rhorer, Kirk D. Rice, Gale A. Holmes
Preliminary data for testing fibers at high strain rates using the Kolsky bar test by Ming Cheng et al. 1 indicated minimal effect of strain rate on the tensile stress-strain behavior of PPTA, poly (p-phenylene terephathalamide) fibers. In a different

Controlled Vapor Deposition Approach to Generating Surface Energy/Chemistry Gradients

June 9, 2011
Author(s)
Julie N. Albert, Joey D. Kim, Christopher Stafford, Thomas H. Epps
Substrate surface energy/chemistry gradients provide a means for high-throughput exploration of the surface interactions that are important for many chemical and biological processes. We describe the implementation of a controlled vapor deposition approach

Spectroscopic charge pumping investigation of the amphoteric nature of Si/SiO2 interface states

June 6, 2011
Author(s)
Jason T. Ryan, Liangchun (. Yu, Jae Han, Joseph J. Kopanski, Kin P. Cheung, Fei Zhang, Chen Wang, Jason P. Campbell, John S. Suehle
The amphoteric nature of Si/SiO2 interface states in submicron sized metal-oxide-silicon-field-effect-transistors is observed using an enhanced spectroscopic charge pumping method. The method’s simplicity and high sensitivity makes it a powerful tool for

Interlaboratory Reproducibility of Size and Surface Charge Measurements on Nanoparticles prior to Biological Impact Assessment

June 3, 2011
Author(s)
Gert Roebben, Sonia Ramirez-Garcia, Vincent A. Hackley, Matthias Roesslein, Fred Klaessig, Vikram Kestens, Iseult Lynch, C. M. Garner, Alan Rawle, Allison Elder, Vicky Colvin, Wolfgang Kreyling, Harald Krug, Zuzanna Lewicka, Scott McNeil, Andre Nel, Anil K. Patri, Peter Wick, Tian Xia, Guenther Oberdoerster, Kenneth Dawson
The International Alliance for NanoEHS Harmonization (IANH) organises interlaboratory comparisons of methods relevant for a better understanding of the biological impacts of nano-objects, to highlight and remove sources of irreproducibility in existing

INDENTATION AND ADHESION AT SMALL LENGTH SCALES

June 1, 2011
Author(s)
Robert F. Cook
Indentation and adhesion are considered in the context of the two experimental methods predominantly used to measure contact behavior at small length scales, instrumented indentation testing and atomic force microscopy. The typical loads and displacements
Displaying 1851 - 1875 of 3718
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