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Topic Area: Advanced Materials
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Displaying records 31 to 40 of 69 records.
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31. 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

32. 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

33. 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

34. 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 Frederick 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

35. Internal tin Nb3Sn conductors engineered for fusion and particle accelerator applications
Topic: Advanced Materials
Published: 6/22/2009
Authors: Jeffrey Parrell, Y. Zhang, Michael Field, M Meinesz, Yonghua Huang, H Miao, Seungok Hong, Najib Cheggour, Loren Frederick Goodrich
Abstract: The critical current density (Jc) of Nb3Sn strand has been significantly improved over the last several years. For most magnet applications, high Jc internal tin has displaced bronze process strand. The highest Jc values are obtained from distributed ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900165

36. Low Force AFM Nanomechanics with Higher-Eigenmode Contact Resonance Spectroscopy
Topic: Advanced Materials
Published: 1/11/2012
Authors: Jason Philip Killgore, Donna C. Hurley
Abstract: Atomic force microscopy (AFM) methods for quantitative measurements of elastic modulus on stiff (>10 GPa) materials typically require tip-sample contact forces in the hundreds of nanonewton to few micronewton range. Such large forces can incur sa ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909735

37. Manipulation of the elastic modulus of polymers at the nanoscale: Influence of UV-ozone crosslinking and plasticizer
Topic: Advanced Materials
Published: 8/16/2010
Authors: Jessica M. Torres, Christopher M Stafford, Bryan D. Vogt
Abstract: The mechanical stability of polymeric nanostructures is critical to the processing, assembly and performance of numerous existing and emerging technologies. A key predictor of mechanical stability is the elastic modulus. However, a significant reduc ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904765

38. Measuring the viscoelastic properties of confined polymer films by thermal wrinkling
Topic: Advanced Materials
Published: 3/21/2010
Authors: Edwin P Chan, Kirt Anthony Page, Christopher M Stafford
Abstract: We demonstrate that thermal wrinkling can be utilized to measure the rubbery modulus and shear viscosity of polystyrene (PS) thin films as a function of temperature. Specifically, we use surface laser-light scattering (SLS) to characterize the wrinkl ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904142

39. Mechanically Robust Spin-On Organosilicates Glasses for Nanoporous Applications
Topic: Advanced Materials
Published: 2/7/2007
Authors: Hyun Wook Ro, K Char, Eun-Chae Jeon, H C Kim, Dongil Kwon, Hae-Jeong Lee, J. H. Lee, Hee-Woo Rhee, Christopher L Soles, Do Y. Yoon
Abstract: An increasing number of technologies demand nanoporous materials with vastly improved physical, mechanical and thermal properties. This manuscript develops the microstructural basis for synthesizing organosilicate glasses (OSGs) with unprecedented ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852621

40. Modulus-Driven Differentiation of Marrow Stromal Cells in 3D Is Independent of Cytoskeletal Integrity
Topic: Advanced Materials
Published: 4/11/2011
Authors: Carl George Simon Jr, Kaushik Chatterjee, Sapun Parekh, Sheng Lin-Gibson, Nicole M. Moore, Marcus T Cicerone, Marian F Young
Abstract: Cell functions such as proliferation, migration, and differentiation are key physiological processes that are influenced by the physiochemical extracellular environment. We report on the effect of three-dimensional (3D) scaffold modulus on human bon ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907017



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