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Displaying records 211 to 220 of 221 records.
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211. Transient Target Patterns in Phase Separating Filled Polymer Blends
Published: 9/1/1999
Authors: Alamgir Karim, Jack F Douglas, G Nisato, D W. Liu, Eric J. Amis
Abstract: Recent simulations have indicated that the presence of filler particles in a phase separating blend can induce the development of composition waves having the symmetry of the filler particles. We investigate these predictions through atomic force mi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851579

212. Tuning Polymer Melt Fragility With Antiplasticizer Additives
Published: 6/19/2007
Authors: Robert A Riggleman, Jack F Douglas, J J de Pablo
Abstract: A polymer-diluent model exhibiting antiplasticization has beendeveloped and characterized by molecular dynamics simulations. Antiplasticizer molecules are shown to decrease the glass transition temperature Tg, but to increase the elastic moduli o ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852717

213. Tuning the Fragility of Polymer Melts With Antiplasticizer Additives
Published: Date unknown
Authors: Robert A Riggleman, K Yoshimoto, Jack F Douglas, J J de Pablo
Abstract: Using molecular dynamics simulations, we have developed and analyzed a model that exhibits antiplasticization behavior by decreasing the glass transition temperature, increasing the density of the system below the glass transition temperature of the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852571

214. Unusual Expansion and Contraction in Ultrathin Glassy Polycarbonate Films
Published: 4/1/2004
Authors: Christopher L Soles, Jack F Douglas, Ronald Leland Jones, Wen-Li Wu
Abstract: The thermal expansion behavior and glass transitions of poly(styrene) (PS) and poly(methyl methacrylate) (PMMA) are extensively studied in the thin film geometry. Both PS and PMMA are similar in that they possess very low entanglement densities. In ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851774

215. Using Block Copolymer Self-Assembly to Imprint the Crystallization of Polymer Dendrites
Published: 8/10/2011
Authors: Sangcheol Kim, Alamgir Karim, Jack F Douglas, Christopher L Soles, R M Briber
Abstract: We utilize the self-assembly of cylinder-forming block copolymer (BCP) films to create templates for dendritic polymer crystallization patterns. This templating was achieved by simply spin-casting thin films from a solution containing both the BC ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903962

216. Using Pattern Homogenization of Binary Masks to Fabricate Microfluidic Structures With 3D Topography
Published: 5/2/2007
Authors: Francisco Javier Atencia, Susan E. Barnes, Jack F Douglas, John Meacham, Laurie E Locascio
Abstract: Because fluids at the microscale form three dimensional interfaces and are subject to three dimensional forces, the ability to create microstructures with modulated topography over large areas could greatly improve control over microfluidic phenomena ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830553

217. Water Immersion of Model Photoresists: Interfacial Influences on Water Concentration and Surface Morphology
Published: 2/1/2005
Authors: B D. Vogt, D L Goldfarb, M Angelopoulos, Christopher L Soles, C M Wang, Vivek M Prabhu, P M McGuiggan, Jack F Douglas, Eric K Lin, Wen-Li Wu, Sushil K Satija
Abstract: 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 photoresis ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852338

218. Wetting-Dewetting Transition Line in Thin Polystyrene Films
Published: Date unknown
Authors: K M. Ashley, D T Raghavan, Jack F Douglas, Alamgir Karim
Abstract: Thin polymeric films are increasingly being utilized in diverse technological applications and it is crucial to have a reliable method to characterize the stability of these films against dewetting. The parameter space that influences the dewetting ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852496

219. Wetting-Dewetting Transition Line in Thin Polystyrene Films
Published: 9/9/2005
Authors: H Raghavan, K M. Ashley, A Seghal, Jack F Douglas, Alamgir Karim
Abstract: 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 f ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852634

220. What Do We Learn From the Local Geometry of Glass-Forming Liquids?
Published: 9/1/2002
Authors: Francis W. ~undefined~undefined~undefined~undefined~undefined Starr, Srikanth Sastry, Jack F Douglas, S C Glotzer
Abstract: We examine the local geometry of a simulated glass-forming polymer melt. Using the Voronoi construction, we find that the distributions of Voronoi volume $P(v_V)$ and asphericity $P(a)$ appear to be universal properties of dense liquids, supporting ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852078



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