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Displaying 1526 - 1550 of 1923

Synopsis of the 2004 ASMS Fall Workshop on Polymer Mass Spectrometry

February 1, 2005
Author(s)
William E. Wallace
This year s fall workshop of the American Society for Mass Spectrometry was on the topic of synthetic polymer mass spectrometry and was chaired by Robert P. Lattimer (Noveon, Inc.) and Chrys Wesdemiotis (University of Akron, Department of Chemistry). The

Water Distribution Within Immersed Polymer Films

February 1, 2005
Author(s)
B D. Vogt, Christopher Soles, Vivek Prabhu, Sushil K. Satija, Eric K. Lin, Wen-Li Wu
The emergence of immersion lithography as a potential alternative for the extension of current lithography tools will require a fundamental understanding of the interactions between the photoresist and the immersion liquid such as water. The water

Water Immersion of Model Photoresists: Interfacial Influences on Water Concentration and Surface Morphology

February 1, 2005
Author(s)
B D. Vogt, D L. Goldfarb, M Angelopoulos, Christopher Soles, C M. Wang, Vivek Prabhu, P M. McGuiggan, Jack F. Douglas, Eric K. Lin, Wen-Li Wu, Sushil K. Satija
Immersion lithography has emerged as an alternative to the 157 nm node and as such understanding of the interactions between the photoresist and immersion fluid (water) has become a pressing issue. The water concentration within the model photoresist films

Design, Development and Testing of a Hybrid Device for In-Situ Testing of Sealant

January 19, 2005
Author(s)
Christopher C. White, E Embree, C Buch
A new hybrid in-situ sealant-testing device that uses movement to both characterize and fatigue standard ASTM C719 sealant samples is described. This five sample device, records the force-response data for every deformation cycle of every sample. From this

Bioactive Surface Gradients to Control Cell Adhesion

January 1, 2005
Author(s)
Matthew Becker, Nathan D. Gallant, Eric J. Amis
Incorporating discrete cell adhesion motifs onto substrates in a defined orientation with variable spacing and increasing concentration offers a robust strategy for measuring ligand dependent cell-material interactions and encouraging specific cell

Combinatorial Approaches for Characterizing Thin Film Bond Strength

January 1, 2005
Author(s)
Martin Chiang, D Kawaguchi, Christopher Stafford
A combinatorial approach to the edge delamination test was carried out to obtain the failure map of the epoxy/glass bond joint as a function of both temperature and film thickness. In the combinatorial test, a single specimen of an epoxy film bonded to a

Development of a Microfluidic Rheometer for Complex Fluids

January 1, 2005
Author(s)
Jai A. Pathak, Robert F. Berg, Kathryn Beers
Our group has recently published a report of a combinatorial rheometer/viscometer developed in our lab, based on the princinple of a damped harmonic oscillator. In this paper, we describe a modification of this approach to scale down this viscometer to the

Elastic Instability of Multilayer Films Coated on Substrates

January 1, 2005
Author(s)
Shu Guo, Martin Y. Chiang, Christopher M. Stafford
Mechanical properties of ultra-thin (submicrometer) films coated on a substrate are paramount in many applications. One question arises as to whether the physical and mechanical properties of supported thin films in applications can be significantly

High-Throughput Modulus Measurements of Ultra-Soft Polymer Networks

January 1, 2005
Author(s)
Elizabeth A. Wilder, Shu Guo, Martin Chiang, Christopher Stafford
A metrology for rapidly measuring the modulus of ultra-soft polymer networks has been developed. The method utilizes compression-induced buckling of a sensor film that is applied to the surface of the specimen, where the modulus-dependent buckling

Microchannel Confined Surface Initiated Polymerization

January 1, 2005
Author(s)
Chang Xu, Tao Wu, Charles M. Drain, J Batteas, Kathryn L. Beers
Surface initiated atom transfer radical polymerization was successfully carried out inside a microchannel, which was formed by placing a patterned poly(dimethylsiloxane) (PDMS) stamp on top of an initiator modified flat silicon substrate. Both surface

Multi-Sample Couette Viscometer for Polymer Formulations

January 1, 2005
Author(s)
H J. Walls, Robert F. Berg, Eric J. Amis
We describe a prototype scalable viscometer aimed at facilitating rapid measurements of multiple samples. The device simultaneously measures the viscosity of four samples in an array of Couette cells. Each cell contains a rotor with an embedded permanent

Non-Linear Charge Transport in Polythiophene Under High AC Field

January 1, 2005
Author(s)
Jan Obrzut, Tatiana Psurek, C. K. Chiang, Dean DeLongchamp
Complex impedance and conductivity were measured for regioregular poly(3-hexylthiophene) (P3HT) at alternating current (AC) voltages using a waveform technique. The waveforms were Fourier transformed from time domain to frequency domain and analyzed at

Stress Analysis for Combinatorial Buckling-Based Metrology of Thin Film Modulus

January 1, 2005
Author(s)
Shu Guo, Christopher M. Stafford, Martin Y. Chiang
We recently reported on a new buckling-based metrology for probing the elastic modulus of thin polymer films. In this experimental geometry, a thin film of interest is transferred to a relatively thick elastic substrate, and buckling is induced by

Synthesis and Characterization of Poly(ethylene glycol) Dimethacrylate Hydrogels

January 1, 2005
Author(s)
Sheng Lin-Gibson, S Bencherif, Joseph M. Antonucci, Horkay F. JonesRL
Facile synthesis and detailed characterization of photo-polymerizable and biocompatible poly(ethylene glycol) dimethacrylates (PEGDM) and their hydrogels are described. Combined analyses of 1H NMR and MALDI-TOF MS confirmed the formation of prepolymers of
Displaying 1526 - 1550 of 1923
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