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Displaying 1301 - 1325 of 3439

Effects of Contact Geometry Upon Pull-Off Force Measurements With a Colloidal Probe

February 5, 2008
Author(s)
Seung Ho Yang, Huan Zhang, Michael Nosonovsky, Koo-Hyun Chung
This paper examines the effects of contact geometry on the pull-off (adhesion) force between a glass sphere (colloidal probe) and a silicon substrate in an environment with controlled relative humidity. An atomic force microscope (AFM) is used to measure

X-Ray Topography to Characterize Surface Damage on CdZnTe Crystals

January 7, 2008
Author(s)
David R. Black, Joseph C. Woicik, Martine Duff, Douglas Hunter, Arnold Burger, Michael Groza
Synthetic CdZnTe or CZT crystals can be used for room temperature detection of ?-radiation. Structural/morphological heterogeneities within CZT, such as twinning, secondary phases (often referred to as inclusions or precipitates), and polycrystallinity can

Cell Adhesion and Spreading on Poly(D,L-lactic acid) Films Pre-Aged in Cell Medium

January 1, 2008
Author(s)
Ruby I. Chen, Nathan D. Gallant, Jack R. Smith, Matt J. Kipper, Carl G. Simon Jr.
From a biomaterials perspective, three primary events can occur when a biodegradable polymer is implanted in vivo: 1) polymer degradation, 2) protein adsorption to the polymer and 3) swelling of the polymer as it absorbs water. These actions can affect the

Do Plastic Zones Form at Crack Tips in Silicate Glasses?

December 13, 2007
Author(s)
Jose Lopez-Cepero, Sheldon M. Wiederhorn, Theo Fett, Jean-Pierre Guin
In a number of recent studies, the claim has been made that silicate glasses fracture by the formation, growth and coalescence of cavities, in the same way that metals do but at a much smaller scale. Evidence for cavity formation comes from the examination

Characterization of Spatial Heterogenieties in Detector Grade CdZnTe

December 4, 2007
Author(s)
Martine Duff, Douglas Hunter, Arnold Burger, Michael Groza, V Buliga, J Bradley, G Graham, Z Dai, N Teslich, David R. Black, H E. Burdette, A Lanzirotti
Synthetic Cd1-xZnxTe or CZT crystals are highly suitable for the room temperature-based spectroscopy of gamma radiation. Structural/morphological heterogeneities within CZT, such as secondary phases that are thought to consist of Te metal, can have
Displaying 1301 - 1325 of 3439
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