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Displaying 1001 - 1025 of 1926

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

The Effect of Folding on the Internal Structure of Ballistic Fibers

May 26, 2011
Author(s)
Haruki Kobayashi, Walter G. McDonough, Hae-Jeong Lee, Jae H. Kim, Amanda L. Forster, Kirk D. Rice, Gale A. Holmes
In one of our previous studies, the mechanical properties of poly (p-phenylene benzobisoxazole) (PBO) fibers were degraded when the fibers were folded. When we examined poly (p-phenylene terephthalamide) (PPTA) fibers, we did not find a similar drop in

Hyperbranched Poly(ethylene oxide) Electrolytes for Lithium Ion Batteries

May 17, 2011
Author(s)
Christopher L. Soles, Kirt A. Page, Huagen H. Peng
This work demonstrates the capability of hyper-branched PEO polymers to act as a polyelectrolyte for Li-ion batteries. Hyperbranching has been shown to lead to a 100 fold increase in the ion conductivity below the melting temperature of the PEO

Imaging Cells in Polymer Scaffolds by X-Ray Microcomputed Tomography

May 11, 2011
Author(s)
Shauna M. Dorsey, Sheng Lin-Gibson, Carl Simon Jr.
We have investigated the ability of X-ray microcomputed tomography (CT) to make quantitative, three-dimensional (3D) measurements of cell adhesion and proliferation in polymeric tissue engineering scaffolds. The most common method for examining cells in

Combinatorial Screening of Hydrogel Scaffolds for 3D Cell Culture

May 2, 2011
Author(s)
Kaushik Chatterjee, Marian F. Young, Carl Simon Jr.
Optimizing cell-material interactions is critical towards maximizing regeneration in tissue engineering. Combinatorial and high-throughput (CHT) methods can be used to systematically screen tissue scaffolds to identify optimal biomaterial properties

A new interface defect spectroscopy method

April 26, 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, Vinny Tilak, Jody Fronheiser

NIST Reference Material Scaffolds Characterized for Cell Response

April 24, 2011
Author(s)
Carl G. Simon Jr., Jeff M. Coles
Reference scaffolds characterized for cell response are being developed for use as a standard for biological characterization of new scaffolds. The need for reference scaffolds to serve as a calibration standard between labs has been identified as critical

Optical illumination optimization for patterned defect inspection

April 20, 2011
Author(s)
Bryan M. Barnes, Richard Quintanilha, Martin Y. Sohn, Hui Zhou, Richard M. Silver
Rapidly decreasing critical dimensions (CD) for semiconductor devices drive the study of improved methods for the detection of defects within patterned areas. As reduced CDs are being achieved through directional patterning, additional constraints and

Stable Single-Crystalline Body Centered Cubic Fe Nanoparticles

April 20, 2011
Author(s)
Natalie F. Huls, Lise-Marie Lacroix, Don Ho, Xiaolian Sun, Shouheng Sun
Air stable magnetic nanoparticles (MNPs) with high magnetization are required in order to fully realize optimized biomedical agents. However, only metallic NPs with good crystallinity such as Fe or FeCo, exhibit magnetization as high as 220 A.m.kg. Their

Strain-Based Temperature Memory Effect for Nafion(R) and Its Molecular Origins

April 20, 2011
Author(s)
Kirt A. Page, Scott Eastman, Tao Xie
A shape memory polymer traditionally refers to a polymer that can memorize one temporary shape and recover to its permanent shape upon exposure to an external stimulus. Although this basic concept has been known for at least half a century, recent advances

A new interface defect spectroscopy method

April 13, 2011
Author(s)
Jason T. Ryan, Liangchun (. Yu, Jae Han, Joseph J. Kopanski, Kin P. Cheung, Jason P. Campbell, Fei Zhang, Chen Wang, John S. Suehle, Vinny Tilak, Jody Fronheiser

A New Interface Defect Spectroscopy Method

April 12, 2011
Author(s)
Jason T. Ryan, Liangchun (. Yu, Jae Han, Joseph J. Kopanski, Kin P. Cheung, Fei Zhang, C Wang, Jason P. Campbell, John S. Suehle, Vinayak Tilak, Jody Fronheiser
A new interface defect spectroscopy method based on variable height charge pumping capable of observing the amphoteric nature of Si/SiO2 interface states in production quality sub-micron devices is demonstrated. It can help to resolve the long standing
Displaying 1001 - 1025 of 1926
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