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Topic Area: Polymers

Displaying records 61 to 70 of 550 records.
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61. Molecular Order in High-Efficiency Polymer/Fullerene Bulk Heterojunction Solar Cells
Topic: Polymers
Published: 9/22/2011
Authors: Matthew R. Hammond, Regis J Kline, Andrew A Herzing, Lee J Richter, David Germack, Hyun W. Ro, Christopher L Soles, Daniel A Fischer, Tao Xu, Luping Yu, Michael F. Toney, Dean M DeLongchamp
Abstract: We report quantitative measurements of ordering, molecular orientation, and nanoscale morphology in the active layer of bulk heterojunction organic photovoltaic cells based on a thieno[3,4-b]thiophene-alt-benzodithiophene copolymer (PTB7), which has ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908836

62. Block copolymer photonic gel for mechanochromic sensing
Topic: Polymers
Published: 9/19/2011
Authors: Edwin P Chan, Joseph J Walish, Edwin L Thomas, Christopher M Stafford
Abstract: In this work, we describe a strategy based on mechanochromic sensing, the coupling between mechanical and optical properties, of a block copolymer photonic gel. Although this phenomena has been observed in many materials, we demonstrate this concept ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908410

63. Characterizing the Mechanical Properties and Degradation of Thin Polymer Membranes
Topic: Polymers
Published: 8/28/2011
Authors: Christopher M Stafford, Jun Y. Chung, Junghyun Lee
Abstract: The elasticity, strength, and toughness of thin polymer membranes are of considerable interest since direct knowledge of these key mechanical properties can provide insight into performance, durability, and underlying degradation mechanisms that occu ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908218

64. Quantifying the Transport Properties of Thin Polymer Gels via an Indentation-Based Technique
Topic: Polymers
Published: 8/28/2011
Authors: Edwin P Chan, Yuhang Hu, Peter M. Johnson, Zhigang Suo, Christopher M Stafford
Abstract: Recently, an indentation approach has been demonstrated to quantify the poroelastic relaxations of hydrogels. Although the approach has been demonstrated to quantify the transport properties of thick hydrogel materials, its relevance for thin hydrog ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908228

65. Characterization of the non-uniform reaction in chemically-amplified calix[4]resorcinarene molecular resist thin films
Topic: Polymers
Published: 7/19/2011
Authors: Vivek M Prabhu, Shuhui Kang, Regis J Kline, Dean M DeLongchamp, Daniel A Fischer, Wen-Li Wu, Sushil K. Satija, Jing Sha, Christopher K. Ober, Peter V. Bonnesen
Abstract: The ccc stereoisomer-purified tert-butoxycarbonyloxy (t-Boc) protected calix[4]resorcinarene molecular resists blended with photoacid generator exhibit a non-uniform photoacid catalyzed reaction in thin films. The surface displays a reduced reaction ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908683

66. Stiffness, strength, and ductility of thin films and membranes ‹ A combined wrinkling-cracking methodology
Topic: Polymers
Published: 7/15/2011
Authors: Jun Y. Chung, Junghyun Lee, Kathryn L Beers, Christopher M Stafford
Abstract: Polymer membranes are at the core of a diverse set of technologies critical to our global health and security, ranging from energy production to water purification to carbon capture. These engineered membranes must maintain performance over many yea ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908241

67. Statistical analysis of fiber gripping effects on single fiber tensile test
Topic: Polymers
Published: 5/26/2011
Authors: Jae Hyun Kim, Nathanael A Heckert, Stefan D Leigh, Walter G McDonough, Haruki Kobayashi, Kirk D Rice, Gale Antrus Holmes
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907786

68. Combinatorial Screening of Osteoblast Response to 3D Nano-Composite Tissue Scaffolds Using Gradients and Arrays
Topic: Polymers
Published: 4/24/2011
Authors: Carl George Simon Jr, Kaushik Chatterjee, Limin Sun, Laurence Chung Lung Chow, Marian F Young
Abstract: Current methods for combinatorial and high-throughput (CHT) screening of cell-material interactions utilize a two-dimensional (2D) format where cells are presented on flat materials surfaces [1]. However, cell response in 3D scaffolds is more represe ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907330

69. Effect of 3D Scaffold Structure on Osteogenic Differentiation of Human Bone Marrow Stromal Cells
Topic: Polymers
Published: 4/24/2011
Authors: Carl George Simon Jr, Girish Kumar, Marian F Young
Abstract: Structural properties of polymeric scaffolds for tissue engineering play a key role in directing osteogenesis. These properties depend on the chemical nature and the fabrication process of biomaterial. There are many protocols for fabricating scaff ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907329

70. NIST Reference Material Scaffolds Characterized for Cell Response
Topic: Polymers
Published: 4/24/2011
Authors: Carl George Simon Jr, Jeff M Coles
Abstract: Reference scaffolds characterized for cell response are being developed for use as a standard for biological characterization of new scaffolds. The need for reference scaffolds to serve as a calibration standard between labs has been identified as c ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907327



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