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Displaying records 31 to 40 of 74 records.
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31. Contact resistance of low-temperature carbon nanotube vertical interconnects
Topic: Advanced Materials
Published: 8/20/2012
Authors: Ann Chiaramonti Chiaramonti Debay, Sten Vollebregt, R. Ishihara, Hugo Schellevis, Kees Beenakker
Abstract: In this work the electrical contact resistance and length dependant resistance of vertically aligned carbon nano- tubes (CNT) grown at 500 °C with high tube density (1011) are investigated by measuring samples with different CNT lengths. From scannin ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911548

32. Graphene Epitaxial Growth on SiC(0001) for Resistance Standards
Topic: Advanced Materials
Published: 6/1/2012
Authors: Mariano A. Real, Tian T. Shen, George R Jones, Randolph E Elmquist, Johannes A Soons, Albert Davydov
Abstract: Epitaxial growth of graphene layers on 6H-SiC(0001) substrates have been studied in order to improve graphene‰s performance for metrological applications. A face-to-face (FTF) sublimation method at 2000 °C and in Ar background atmosphere is used to i ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910566

33. Optimization of Imaging Polymer Based Scaffolds Using X-Ray Microcomputed Tomography
Topic: Advanced Materials
Published: 5/15/2012
Authors: David E, Morris, Melissa L Mather, Carl George Simon Jr., John A Crowe
Abstract: The performance of polymer based scaffolds used in regenerative medicine is linked to their structural properties and as such strategies for structural characterization of scaffolds have been developed. X-ray microscopic computed tomography (X-ray ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906393

34. Gas-Foamed Scaffold Gradients for Combinatorial Screening in 3D
Topic: Advanced Materials
Published: 5/1/2012
Authors: Carl George Simon Jr., Kaushik Chatterjee, Alison M. Kraigsley, Joachim Kohn, Durgadas Bolikal
Abstract: Current methods for screening cell-material interactions typically utilize two-dimensional (2D) culture format where cells are cultured on flat surfaces. However, there is a need for combinatorial and high-throughput screening methods to systematica ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910404

35. Osteoblast Response to Serum Protein Adsorption in 3D Polymer Scaffolds
Topic: Advanced Materials
Published: 5/1/2012
Authors: Carl George Simon Jr., Girish Kumar, Kaushik Chatterjee, Stevephen Hung
Abstract: Protein adsorption is known to direct biological response to biomaterials and is important in determining cellular response in tissue scaffolds. In this study we investigated the effect of adsorbed serum proteins on cell attachment and proliferation ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909572

36. Nano-Apatitic Composite Scaffolds for Stem Cell Delivery and Bone Tissue Engineering
Topic: Advanced Materials
Published: 4/15/2012
Authors: Hockin H. K. Xu, Carl George Simon Jr.
Abstract: The need for bone defect repair and regeneration arises from trauma, disease, congenital deformity, and tumor resection. Bone fracture occurs to seven million people each year in the United States, and musculoskeletal conditions cost $215 billion ann ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904167

37. Freeform Fabricated Scaffolds with Roughened Struts that Enhance both Stem Cell Proliferation and Differentiation by Controlling Cell Shape
Topic: Advanced Materials
Published: 3/1/2012
Authors: Girish Kumar, Carl George Simon Jr., Michael S. (Michael Stephan) Waters, Tanya M. Farooque, Marian F Young
Abstract: We demonstrate that imparting freeform fabricated (FFF) scaffolds with surface roughness on their struts enhances osteogenic differentiation of primary human bone marrow stromal cells (hBMSCs) by controlling cell shape. Previous work showed that hBM ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910664

38. Control of Molecular Mass Distributions in Enzymatic Lactone Polymerizations
Topic: Advanced Materials
Published: 2/2/2012
Authors: Santanu S. Kundu, Peter M. Johnson, Kathryn L Beers
Abstract: Using a model developed for the enzyme catalyzed polymerization and degradation of poly(caprolactone), we illustrate methods and the kinetic mechanisms necessary to improve molecular mass distributions by manipulating equilibrium reactions in the kin ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909997

39. Automated Data Processing and Quantification in Polymer Mass Spectrometry
Topic: Advanced Materials
Published: 12/1/2011
Authors: Till Gruendling, Christopher Barner-Kowollik, William E Wallace III, Charles Martin Guttman, Anthony J Kearsley
Abstract: An overview is given of some new techniques in quantitative composition and molecular mass distribution measurement of synthetic polymers by mass spectrometry. New concepts in data analysis, including peak picking and integration, are also described ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907901

40. Molecular Layer-by-Layer Deposition of Highly Crosslinked Polyamide Membranes for Reverse Osmosis Applications
Topic: Advanced Materials
Published: 11/19/2011
Authors: Peter M. Johnson, Joonsung (Joonsung) Yoon, Jennifer Y. Kelly, John A. Howarter, Christopher M Stafford
Abstract: In membranes for reverse osmosis and nanofiltration, the discriminating layers consist of an interfacially polymerized polyamide film on a porous support. For reverse osmosis membranes, the dominant commercial interfacial film is a crosslinked netwo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908946



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