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Topic Area: Advanced Materials
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21. Examination of the Application of a Wavelet Transformation to Acoustic Emission Signals: part 1. Source Identification
Topic: Advanced Materials
Published: 1/1/2002
Authors: Marvin Arnold Hamstad, Agnes O'Gallagher, John M. Gary
Abstract: A database of wideband acoustic emission (AE) modeled signals was used in Part 1 to examine the application of a wavelet transform (WT) to accomplish identification of AE sources. The AE signals in the database were created by use of a validted thre ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851301

22. 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

23. Gas-Foamed Scaffold Gradients for Combinatorial Screening in 3D
Topic: Advanced Materials
Published: 5/1/2012
Authors: Carl GEORGE Simon Jr, Kaushik Chatterjee, Alison McGibbon 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

24. Generation of Monolayer Gradients in Surface Energy and Chemistry for Block Copolymer Thin Film Studies
Topic: Advanced Materials
Published: 12/1/2009
Authors: Julie N. L. Albert, Michael J. Baney, Christopher M Stafford, Jennifer Y. Kelly, Thomas H Epps
Abstract: We utilize an innovative vapor deposition set-up and cross-diffusion of functionalized chlorosilanes under dynamic vacuum to generate a linear gradient in surface energy and composition on a silicon substrate. The gradient can be tuned by manipulati ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902680

25. Giant piezoelectricity in PMN-PT thin films: Beyond PZT
Topic: Advanced Materials
Published: 11/1/2012
Authors: S. H. Baek, M. S. Rzchowski, Vladimir A Aksyuk
Abstract: Micro-electromechanical systems (MEMS) incorporating piezoelectric layers provide active transduction between electrical and mechanical energy, which enables highly sensitive sensors and low-voltage driven actuators surpassing the passive operation o ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912113

26. 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

27. Harnessing Wrinkle Delamination Mechanics to Measure and Pattern Polymer Coatings
Topic: Advanced Materials
Published: 3/21/2010
Authors: Adam J. Nolte, Jun Y. Chung, Christopher M Stafford
Abstract: Compressive stresses in stiff polymer coatings can give rise to surface instabilities in which the coating adopts a sinusoidally wrinkled morphology with a dominant wavelength, d, as displayed in Figure 1a. Such instabilities are generally observed ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904141

28. INVESTIGATING THE MECHANISM OF ENZYME-CATALYZED RING-OPENING COPOLYMERIZATIONS
Topic: Advanced Materials
Published: 8/19/2012
Authors: Matthew T. (Matthew) Hunley, Fahriye Nese Sari, Kathryn L Beers
Abstract: As the research interest in degradable polymers has risen, an ever increasing number of manuscripts report the synthesis of copolymers through ring-opening copolymerization techniques. However, the mechanism of copolymerization remains unexplored. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911008

29. Impact of molecular mass on the elastic modulus of polystyrene thin films
Topic: Advanced Materials
Published: 7/31/2010
Authors: Jessica M. Torres, Christopher M Stafford, Bryan D. Vogt
Abstract: Euler wrinkling was used to determine the elastic modulus at ambient temperature of polystyrene (PS) films of varying thickness and relative molecular mass (Mn). A range of Mn from 1.2 kg/mol to 990 kg/mol was examined to determine if the molecular ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903960

30. Inter-Laboratory Comparisons of NbTi Critical Current Measurements
Topic: Advanced Materials
Published: 6/22/2009
Authors: Arno Godeke, D. Turrioni, T. Boutboul, Najib Cheggour, A. K. Ghosh, Loren F Goodrich, M Meinesz, A. den Ouden
Abstract: We report on a multi-institute comparison of critical current data, measured on a modern Large Hadron Collider (LHC) NbTi wire that has shown a standard deviation below 1% in critical current density spread in more than 1500 measurements. Inter-labor ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900166