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Materials

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Displaying 1901 - 1925 of 2366

Effect of 3D Hydrogel Scaffold Stiffness on Human Bone Marrow Stromal Cell Differentiation

November 1, 2010
Author(s)
Carl G. Simon Jr., Sapun Parekh, Marcus T. Cicerone, Sheng Lin-Gibson, Kaushik Chatterjee, Marian F. Young
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 bone

On the Fracture Behavior of Nano-Layered Coatings Under Tension.

October 29, 2010
Author(s)
Daniel Josell, Herzl Chai
In this work the fracture behavior of a model brittle/ductile (Si/Ag) multilayer evaporated on a thick substrate is studied with the aid of a four-point bending apparatus. The system variables include individual layer thickness (2.5 to 30 nm), total film

Investigation of Thermally Responsive Block Copolymer Thin Film Morphologies Using Surface Gradients

October 20, 2010
Author(s)
Jennifer Y. Kelly, Julie N. Albert, John A. Howarter, Shuhui Kang, Christopher Stafford, Thomas H. Epps, Michael J. Fasolka
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 changes

New Intermetallics YbAu2In4 and Yb2Au3In5

October 20, 2010
Author(s)
Peter C. Sebastian, James Salvador, Joshua B. Martin, Mercouri G. Kanatzidis
The intermetallic compounds YbAu2In4 and Yb2Au3In5 were obtained as single crystals in high yield from reactions run in liquid indium. Single crystal X-ray diffraction data of YbAu2In4 showed that it crystallizes as a new structure type in the monoclinic

Integrated Computational Materials Engineering, CALPHAD and Hans Leo Lukas

October 16, 2010
Author(s)
Ursula R. Kattner, H. J. Seifert
Integrated Computational Materials Engineering (ICME) has become one of the new hot topics in materials science and engineering in recent years, and worldwide numerous conferences and symposia have been dedicated to this topic. In the report of the

Workshop on Quantitative Tools for Condition Assessment of Aging Infrastructure

October 14, 2010
Author(s)
Ward L. Johnson, Thomas A. Siewert, Jessica Terry, Dat Duthinh, Mark Iadicola, William E. Luecke, Joseph D. McColskey
The Quantitative Tools for Condition Assessment of Aging Infrastructure Workshop was held May 4-5, 2010, in Boulder, Colorado. It was organized by a team of researchers within the National Institute of Standards and Technology s (NIST) Materials Science

Effect of Phase Change and Solute Diffusion on Spreading on a Dissolving Substrate

October 1, 2010
Author(s)
Walter Villanueva, William J. Boettinger, James A. Warren, Gustav Amberg
Dissolutive wetting is investigated numerically using a diffuse-interface model that incorporates fluid flow, solute diffusion, and phase change. A range of materials parameters are investigated that: 1) permits recovery of the hydrodynamic limit by

Peer Review Report 2010

September 22, 2010
Author(s)
Thomas A. Siewert, Robert Smith, Theresa Bell, Joseph D. McColskey, Richard J. Fields
The Pipeline and Hazardous Materials Safety Administration s Pipeline Safety Research and Development (R&D) Program held a structured peer review of active research projects in April 2010. The peer review panel consisted of twelve government and industry

Photoresist latent and developer images as probed by neutron reflectivity methods

September 16, 2010
Author(s)
Vivek M. Prabhu, Shuhui Kang, David L. VanderHart, Eric K. Lin, Wen-Li Wu
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 must

Stability and Surface Topography Evolution in Nanoimprinted Polymer Patterns under a Thermal Gradient

September 16, 2010
Author(s)
Christopher Soles, Yifu Ding, H. Jerry Qi, Kyle J. Alvine, Hyun W. Ro, Dae Up Ahn, Jack Douglas, Sheng Lin-Gibson
Nanostructures created in polymer films by nanoimprint lithography are subject to large stresses, both those from the imprinting processes as well as stresses arising from the intrinsic thermodynamic instabilities. These stresses can induce nanostructure

Surface Wrinkling: a Versatile Platform for Measuring Thin Film Properties

September 2, 2010
Author(s)
Jun Y. Chung, Adam J. Nolte, Christopher M. Stafford
Surface instabilities in soft matter have captivated the scientific community for decades. Recently, surface wrinkling has received a great deal of attention due to its simplicity and well-established mechanics of formation. Particularly, the use of

Effect of 3D Hydogel Scaffold Modulus and Topology on Human Bone Marrow Stromal Cell Fate

September 1, 2010
Author(s)
Kaushik Chatterjee, Sheng Lin-Gibson, Sapun Parekh, Nicole M. Moore, Marcus T. Cicerone, marian F. young, Carl Simon Jr.
There is growing recognition that cells can sense and respond to the physical cues from their environment, such as stiffness, mechanical loading and topology. Physical properties of the matrix can direct cellular response and are critical in the design of

Framework Type Determination for Zeolite Crystals in the Inorganic Crystal Structure Database

September 1, 2010
Author(s)
Shujiang Yang, Mohammed Lach-hab, Iosif I. Vaisman, Estela Blaisten-Barojas, Xiang Li, Vicky L. Karen
This work provides assignment of framework type for 1391 zeolite crystal entries in the Inorganic Crystal Structure Database (ICSD). Additionally, a proposed framework type is provided for a set of 27 zeolite crystals with geometrical distortions and a set

Synthesis and Electronic Properties of the Misfit Layered Compound [(PbSe)1.00]1[MoSe2]1

September 1, 2010
Author(s)
Ian M. Anderson, Michael D. Anderson, Andrew A. Herzing, Colby Heideman, Raimar Rostek, David C. Johnson
An ultra-low thermal conductivity compound with the ideal formula [(PbSe)1.00]1[MoSe2]1 has been successfully crystallized across a range of compositions. The lattice parameters varied from 12.41 Å to 12.75 Å and the quality of the observed 00ℓ diffraction

Measurement Needs in Sustainability and Materials Performance

August 24, 2010
Author(s)
Richard E. Ricker
Sustainability is an attractive approach to environmental stewardship because it recognizes the importance of continued profitability in maintaining the environment and advancing society. However, the ability of this approach to actually provide benefit
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