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Displaying 901 - 925 of 1733

Generating Thickness Gradients of Thin Polymer Films via Flow Coating

February 1, 2006
Author(s)
Christopher Stafford, Kristen Roskov, Thomas Epps, Michael J. Fasolka
Thickness is a governing factor in the behavior of films and coatings. To enable the high-throughputanalysis of this parameter in polymer systems, we detail the design and operation of a flow coater device for fabricating continuous libraries of polymer

Quantification of the Meniscus Effect in Adhesion Force Measurements

February 1, 2006
Author(s)
Jaroslaw Grobelny, Pradeep N. Namboodiri, Doo-In Kim, Z C. Ying
Adhesion forces between a gold sphere and flat gold substrate are studied using atomic force microscopy in different environments. The pull-off force measured in vacuum is found to be a small fraction of that in ambient air or nitrogen atmosphere. In

Surfaces of Fluorinated Pyridinium Block-Copolymers with Enhanced Antibacterial Activity

January 19, 2006
Author(s)
Sitaraman Krishnan, R J. Ward, A Hexemer, K E. Sohn, K L. Lee, E R. Angert, Daniel A. Fischer, E J. Kramer, Christopher K. Ober
Polystyrene-block-poly(4-vinylpyridine) copolymers were quaternized with 1-bromohexane and 6-perfluorooctyl-1-bromohexane. Surfaces prepared from these polymers were characterized by contact angle measurements, near-edge X-ray absorption fine structure

Wake Fields in the Electron Gas Including Transverse Response

January 19, 2006
Author(s)
Eric J. Cockayne, Zachary H. Levine
Relativistic electrons have transverse electric fields comparable in magnitude to the longitudinal fields. We determine the relative effects of transverse and longitudinal fields of a moving point charge on the dielectric response of a uniform electron gas

First Principles Based Simulations of Relaxor Ferroelectrics

January 16, 2006
Author(s)
Benjamin P. Burton, Eric J. Cockayne, Silvia Tinte, U Waghmare
The phenomenology of Pb(B,B$ {\prime}$)O$_{3}$, perovskite based relaxor ferroelectrics is reviewed, with emphasis on the relationship between chemical short-range order and the formation of polar nanoregions in the temperature range between the freezing

Effect of Shear Flow on Multi-Component Polymer Mixtures

January 1, 2006
Author(s)
Charles C. Han, Yonghua Yao, C.L. Zhang, Erik K. Hobbie
There is considerable interest in the phase behavior of multi-component polymer mixtures, the so-called polymer blends, due to their broad technological importance in the plastics industry. Traditionally, quiescent conditions have been adopted for

High Throughput Measurement of Peel of a Pressure Sensitive Adhesive

January 1, 2006
Author(s)
P M. McGuiggan, James J. Filliben
The peel force of a pressure sensitive adhesive (PSA) tape is measured on a surface that varied linearly in temperature. As the tape is peeled from the surface, the adhesive is peeled from a surface at a different temperature. The temperature can be

Small Angle Neutron Scattering from Labeled Single Wall Carbon Nanotubes

January 1, 2006
Author(s)
Barry J. Bauer, Erik K. Hobbie, Matthew Becker
Small angle neutron scattering (SANS) is used with the high concentration method to extract single particle scattering from single wall carbon nanotubes (SWNTs). The SWNT material was labeled by covalently attaching -C4H9 or -C4D9 groups by use of free

Evaluation of the Anterior Cruciate Ligament, Medial Collateral Ligament, Achilles Tendon and Patellar Tendon as Cell Sources for Tissue-Engineered Ligament

December 1, 2005
Author(s)
James A. Cooper, L A. Bailey, Janell N. Carter, Cynthia Castiglioni, Michelle D. Kofron, Frank K. Ko, Cato T. Laurencin
This study investigated four different connective tissue cell types to determine which cell type is an optimal source for seeding a tissue-engineered Anterior Cruciate Ligament (ACL) replacement. Cells from the ACL, Medial Collateral Ligament (MCL)
Displaying 901 - 925 of 1733
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