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Search Publications by: Alamgir Karim (Assoc)

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Displaying 51 - 75 of 101

Chemically Amplified Resist Fundamentals Studies by Combinatorial approaches

March 1, 2003
Author(s)
M Wang, Vivek Prabhu, Eric K. Lin, Michael J. Fasolka, Alamgir Karim
Sub-100 nm lithography requires more understanding of photoresist material properties and processing conditions to achieve necessary critical dimension control of patterned structures. As resist thickness and feature linewidth decrease, fundamental

Combinatorial Mapping of Polymer Blends Phase Behavior

January 1, 2003
Author(s)
Alamgir Karim, A Sehgal, Eric J. Amis, J C. Meredith
Methodologies for phase behavior characterization allow for discovery of new models for structure-processing-property relationships in polymer blends. Several recent developments were presented in the combinatorial characterization of polymers blends phase

Combinatorial Mapping of Surface Energy Effects on Diblock Copolymer Thin Film Ordering

January 1, 2003
Author(s)
A P. Smith, A Sehgal, Jack F. Douglas, Alamgir Karim, Eric J. Amis
Combinatorial gradient techniques are used to map the thin film morphology dependence of symmetric diblock copolymers as a function of film thickness and substrate surface energy. An inversion from symmetric to asymmetric lamellar morphology is observed as

Influence of Layered-Silicates on the Phase Separated Morphology of PS

January 1, 2003
Author(s)
K Yurekli, Alamgir Karim, Eric J. Amis, R Krishnamoorti
The influence of added nanometer thick layered-silicates on the phase-separated morphology of a near critical blend of PS and PVME was examined. Thin films of the blend with 0.8 vol % of the nanoscale particles were examined by atomic force microscopy as a

Co-Extrusion of Biocompatible Polymers for Scaffolds With Co-Continuous Morphology

April 1, 2002
Author(s)
N. R. Washburn, Carl Simon Jr., Alessandro Tona, H M. Elgendy, Alamgir Karim, Eric J. Amis
A methodology for the preparation of porous scaffolds for tissue engineering using co-extrusion is presented. Poly(espilon-caprolactone) is blended with poly(ethylene oxide) in a twin-screw extruder to form a two-phase material with micron-sized domains

Combinatorial Methods for Investigations in Polymer Materials Science

April 1, 2002
Author(s)
J C. Meredith, A P. Smith, A J. Crosby, Eric J. Amis, Alamgir Karim
Combinatorial methods of drug discovery in pharmaceuticals research are well known and more recent applications have led to the discovery and synthesis of new inorganic materials, catalysts, and organic polymers. Polymeric coatings play an important role

Organization of Hybrid Dendrimer-Inorganic Nanoparticles on Amphiphilic Surfaces

January 1, 2002
Author(s)
Franziska Grohn, X H. Gu, H Grull, J C. Meredith, G Nisato, Barry J. Bauer, Alamgir Karim, Eric J. Amis
Nanosize dendrimer-inorganic hybrid particles have been selectively deposited on micron- scale hydrophilic domains of amphiphilic surfaces, both on SAMs of alternating stripes of acid- and methyl- terminated thiols and on the amphiphilic phase of a PDLA

Phase Diagram of a Nearly Isorefractive Polyolefin Blend

January 1, 2002
Author(s)
Haonan Wang, Charles C. Han, K Shimizu, Erik K. Hobbie, Z G. Wang, J C. Meredith, Alamgir Karim, Eric J. Amis, B S. Hsiao, E T. Hsieh
The phase diagram of coexisting liquid-liquid phase separation (LLPS) and crystallization in nearly isorefractive blends of statistical ethylene/hexane and ethylene/butene copolymers has been investigated. A variety of techniques that exploit

2 Combinatorial Methods Polymer Science: Synthesis and Characterization

November 1, 2001
Author(s)
J C. Meredith, A P. Smith, Alamgir Karim, Eric J. Amis
Combinatorial methodologies offer the ability to efficiently measure relevant chemical and physical properties over lare regimes of varible space. We review recent work in the development of combinatorial methods for polymer synthesis and characterization

Studies of polymer-filler interactions in filled systems

August 1, 2001
Author(s)
Alamgir Karim, Jack F. Douglas, K A. Barnes, A Nakatani, D W. Liu, Eric J. Amis
We observe that the presence of filler partiocles can have a major impact on the properties of filled polymer blend materials. The filler particles, which are found in many commercial polymer blends, modify the phase boundary (interfacial tension, rate of