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Displaying 1426 - 1450 of 1856

Wetting-Dewetting Transition Line in Thin Polystyrene Films

September 9, 2005
Author(s)
H Raghavan, K M. Ashley, A Seghal, Jack F. Douglas, Alamgir Karim
We review recent advances in the application of combinatorial methods to polymer thin film characterization. Combinatorial methods allow the rapid exploration of multidimensional parameter spaces that naturally arise in the description of polymer film

Rheopexy of Synovial Fluid and Protein Aggregation

September 5, 2005
Author(s)
Katherine Oates, Wendy Krause, Ronald L. Jones, R H. Colby
Bovine synovial fluid and albumin solutions of similar concentration are rheopectic (stress increases with time in steady shear). This unusual flow characteristic is caused by protein aggrega- tion, and the total stress is enhanced by entanglement of this

Chemistry of Silanes Interfaces in Dental Polymers and Composites

September 1, 2005
Author(s)
Joseph M. Antonucci, Sabine H. Dickens, Bruce O. Fowler, Hockin D. Xu, Walter G. McDonough
The performance and service life of glassor ceramic-filled polymeric composites depend on the nature of their resin, filler and interfacial phases as well as the efficacy of the polymerization process. The synergy that exists between the organic polymer

Surface-Grafted Block Copolymer Gradients: Effect of Block Length on Solvent Response

September 1, 2005
Author(s)
Chang Xu, Tao Wu, J Batteas, Charles M. Drain, Kathryn L. Beers, Michael J. Fasolka
We outline a method to fabricate gradient combinatorial libraries that explore architectural parameters in surface-grafted block copolymers (BCs). In addition, we demonstrate the utility of such libraries for the rapid, thorough assessment of the response

Microfluidic Platform for Combinatorial Measurements of Polymer Particles

August 28, 2005
Author(s)
Zuzanna T. Cygan, Susan E. Barnes, Kathryn L. Beers, Eric J. Amis
Organic-stable microfluidic devices are used for combinatorial measurements of polymerization reactions on chip. Formulation, processing, and measurement are combined on one chip device for the generation of combinatorial polymer libraries. A monomer /

Direct Correlation of Organic Semiconductor Film Structure to Field-Effect Mobility

August 1, 2005
Author(s)
Dean M. DeLongchamp, S Sambasivan, Daniel A. Fischer, Eric K. Lin, Paul C. Chang, A R. Murphy, J M. Frechet, V Subramanian
Recent efforts towards the large-scale adoption of organic electronics have focused on maximizing device performance using new molecular designs and processing strategies. However, rational design and systematic progress are hindered by insufficient

Gradient Chemical Micropatterns: A Reference Substrate for Surface Nanometrology

August 1, 2005
Author(s)
D Julthongpiput, Michael J. Fasolka, Wenhua Zhang, Tinh Nguyen, Eric J. Amis
We present fabrication routes for a new type of surface specimen that exhibits a micropattern with a gradient in chemical contrast between the pattern domains. Design elements in the specimen allow chemical contrast in the micropattern to be related to

Direct Measurement of the Counterion Distribution Within Swollen Polyelectrolyte Films

July 19, 2005
Author(s)
Vivek M. Prabhu, B D. Vogt, Wen-Li Wu, Eric K. Lin, Jack F. Douglas, Sushil K. Satija, D L. Goldfarb, H Ito
The depth profile of the counterion concentration within thin polyelectrolyte films was measured in situ using contrast variant specular neutron reflectivity to characterize the initial swelling stage of the film dissolution.Wefind substantial counterion

Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry Interlaboratory Comparison of Mixtures of Polystyrene With Different End Groups: Statistical Analysis of Mass Fractions and Mass Moments

July 1, 2005
Author(s)
Charles M. Guttman, S Wetzel, Kathleen M. Flynn, B M. Fanconi, David L. VanderHart, William E. Wallace
A matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) interlaboratory comparison was conducted on mixtures of synthetic polymers having the same repeat unit and closely matching molecular mass distributions but with

Combinatorial and High-Throughput Measurement of the Modulus of Thin Polymer Films

June 1, 2005
Author(s)
Christopher M. Stafford, Shu Guo, Martin Y. Chiang, C Harrison
Considerable attention has been devoted to developing fabrication strategies for constructing combinatorial material libraries as well as tools for characterizing the chemical and physical properties of such libraries. Less attention has been dedicated to

Direct Measurement of the Counterion Distribution Within Swollen Polyelectrolyte Films

May 20, 2005
Author(s)
Vivek M. Prabhu, B D. Vogt, Wen-Li Wu, Jack F. Douglas, Eric K. Lin, Sushil K. Satija, D M. Goldfarb, H Ito
A depth profile of the counterion concentration within thin polyelectrolyte films was measured in-situ using contrast variant specular neutron reflectivity to characterize the initial swelling stage of the film dissolution. We find a substantial counterion

Genetic Cellular Responses to Tyrosine-Derived Polycarbonate Blends

April 1, 2005
Author(s)
L A. Bailey, Matthew Becker, James A. Cooper, J Kohn, Eric J. Amis
The evaluation and identification of detrimental interactions between biological species and synthetic surfaces is a daunting challenge as the number of materials and control of physical variables increases. In this talk, the physical properties of
Displaying 1426 - 1450 of 1856