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Topic Area: Polymers

Displaying records 61 to 70 of 528 records.
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61. Lateral Uniformity in Chemical Composition along a Buried Reaction Front in Polymers
Topic: Polymers
Published: 11/15/2010
Authors: Kristopher Lavery, Vivek M Prabhu, Sushil K Satija, Wen-Li Wu
Abstract: Off-specular neutron reflectometry was applied to characterize the form and amplitude of lateral compositional variations at a buried reaction-diffusion front. In this work, off-specular neutron measurements were first calibrated using off-specular ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903570

62. Polymeric Gels Prepared from the Mixtures of Polar Polymers and Ionic Liquids for Thermally Remendable Coating Systems
Topic: Polymers
Published: 11/7/2010
Authors: Joonsung (Joonsung) Yoon, Christopher M Stafford
Abstract: A new kind of physical gels was prepared using the mixtures of poly(vinyl alcohol) (PVOH) and high melting ionic liquid (IL), 1-ethylpyridinium bromide. As the IL content was increased, the stiffness of the mixtures decreased sharply while extensibil ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906696

63. Instabilities as a Measurement Tool for Soft Materials
Topic: Polymers
Published: 11/2/2010
Authors: John A. (John A) Howarter, Christopher M Stafford
Abstract: Mechanical instabilities such as wrinkles, creases, and folds have long been viewed as a source of frustration for engineers and often a point of curiosity among scientists. Scientists aspire to understand the underlying physics behind the formation ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905663

64. Effect of 3D Hydrogel Scaffold Stiffness on Human Bone Marrow Stromal Cell Differentiation
Topic: Polymers
Published: 11/1/2010
Authors: Carl George Simon Jr, Sapun Parekh, Marcus T Cicerone, Sheng Lin-Gibson, Kaushik Chatterjee, Marian F Young
Abstract: There is growing recognition cells can sense and respond to the mechanical properties of tissue scaffolds and that these interactions are critical in optimizing scaffold design [1-4]. Previous studies in planar 2D culture format have shown that human ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906309

65. Changes in Ion Channel Geometry Resolved to Sub-angstrom Levels via Single Molecule Mass Spectrometry
Topic: Polymers
Published: 10/29/2010
Authors: Joseph William Robertson, John J Kasianowicz, Joseph Earl Reiner
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905357

66. 3D Nanoscale Characterization of Thin-Film Organic Photovoltaic Device Structures via Spectroscopic Contrast in the TEM
Topic: Polymers
Published: 10/21/2010
Authors: Andrew A Herzing, Lee J Richter, Ian M Anderson
Abstract: The three-dimensional characterization of third generation photovoltaic device structures at the nanometer scale is essential to the development of efficient, reliable, and inexpensive solar cell technologies. Electron tomography is a powerful metho ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905254

67. Investigation of Thermally Responsive Block Copolymer Thin Film Morphologies Using Surface Gradients
Topic: Polymers
Published: 10/20/2010
Authors: Jennifer Y. Kelly, Julie N. L. Albert, John A. (John A) Howarter, Shuhui Kang, Christopher M Stafford, Thomas H Epps, Michael J Fasolka
Abstract: We report the use of a gradient library approach to characterize the structure and behavior of thin films of a thermally-responsive block copolymer (BCP), poly(styrene-b-tert-butyl acrylate), that exhibits chemical deprotection and morphological chan ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906129

68. Effect of 3D Scaffold Structure on Osteogenic Differentiation of Human Bone Marrow Stromal Cells
Topic: Polymers
Published: 9/30/2010
Authors: Girish Kumar, Marian F Young, Carl George Simon Jr
Abstract: 3D structural properties of polymeric scaffolds for tissue engineering play a key role in directing osteogenesis. In addition, much work has demonstrated that cell differentiation is sensitive to topology at sizes ranging from nano- to micro- to mac ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906748

69. Fine-tuning of polymeric resins and their interfaces with amorphous calcium phosphate. A strategy for designing effective remineralizing dental composites
Topic: Polymers
Published: 9/29/2010
Authors: Joseph M Antonucci, Drago Skrtic
Abstract: For over a decade our group has been designing, preparing and evaluating bioactive, remineralizing composites based on amorphous calcium phosphate (ACP) fillers embedded in polymerized methacrylate resin matrices. In these studies a major focus has b ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905922

70. Photoresist latent and developer images as probed by neutron reflectivity methods
Topic: Polymers
Published: 9/16/2010
Authors: Vivek M Prabhu, Shuhui Kang, David Lloyd VanderHart, Eric K Lin, Wen-Li Wu
Abstract: Photoresist materials enable the fabrication of advanced integrated circuits with ever decreasing feature sizes. As next-generation light sources are developed, using extreme ultraviolet light of wavelength 13.5 nm, these highly-tuned formulations m ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902742