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Author: jack douglas
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11. Breakup of a Fluid Thread in a Confined Geometry: Droplet-Plug Transition, Perturbation Sensitivity and Kinetic Stabilization with Confinement
John G Hagedorn, Nicos Martys, Jack F Douglas
12. Bridging the Gap Between Structure and Properties in Nano-Particle Filled Polymers
NIST Interagency/Internal Report (NISTIR)
Erik K. Hobbie, Francis W. ~undefined~undefined~undefined~undefined~undefined Starr, Jack F Douglas, Charles C. Dr. Han
On May 29-30, 2002, a workshop on polymer nanocomposites was held at NIST in Gaithersburg, Maryland. The workshop was entitled Bridging the Gap Between Structure and Properties in Nanoparticle-Filled Polymers and focused primarily on the interrelati ...
13. Capillary Instability in Nanoimprinted Polymer Films
Kyle J. Alvine, Yifu Ding, Hyun Wook Ro, Brian C. Okerberg, Alamgir Karim, Christopher L Soles, Jack F Douglas
Capillary forces play an active role in defining the equilibrium structure of nanoscale structures. This effect can be especially pronounced in soft materials such as polymers near or above their glass transition temperatures where material flow is ...
14. Characterization of Atomic Motions Governing Grain Boundary Migration
Hao Zhang, David J Srolovitz, Jack F Douglas, James A Warren
Molecular dynamics simulations were employed to study atomic motion within stationary and migrating asymmetric tilt grain boundaries. We employ several measures of the complexity of the atomic trajectories, including the van Hove correlation funct ...
15. Characterization of Symmetric Diblock Copolymers With High-Throughput Techniques
Alamgir Karim, A P Smith, Jack F Douglas, Eric J. Amis
Surface pattern formation in thin block copolymer films is investigated utilizing a high-throughput methodology by creating films having gradients in film thickness. We observe a succession of surface patterns that repeat cyclically across the film ...
16. Characterization of the Potential Energy Landscape in an Antiplasticized Polymer
Robert A Riggleman, Jack F Douglas, J J de Pablo
Transition state searches have been performed on model coarse-grained polymer systems, and the results compared to those of an antiplasticized polymer system, which have been previously shown to be fragile and strong glass-forming systems, respective ...
17. Colliding Self-Assembly Waves in Organosilane Monolayers
K Efimenko, Ali Ozcam, Jan Genzer, Daniel A Fischer, Frederick R Phelan Jr, Jack F Douglas
Colliding autocatalytic wave-fronts of organosilane (OS) layer self-assembly are generated through the controlled positioning of sources of the volatile OS material at the edges of a silica wafer and through adjustment of the container dimensions in ...
18. Combinatoral Study of Surface Pattern Formation in Thin Block Copolymer Films
A P Smith, Jack F Douglas, Alamgir Karim, J C Meredith, Eric J. Amis
We investigate surface patterns in thin block copolymer films with a gradient in thickness, h. The usual hole and island morphologies are found when h varies from integral multiples m of the bulk lamellar thickness Lo but spinodal-like hole and ...
19. Combinatorial Mapping of Surface Energy Effects on Diblock Copolymer Thin Film Ordering
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 obse ...
20. Combinatorial Measurements of Crystallization Growth Rate and Morphology in Thin Films of Isotactic Polystyrene
Kathryn L Beers, Jack F Douglas, Eric J. Amis, Alamgir Karim
Combinatorial methods are utilized to study the influence of film thickness, h, and crystallization temperature, T, on the crystallization of isotactic polystyrene. Films with continuous gradients in film thickness were prepared by flow coating and ...