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Displaying records 381 to 390 of 408 records.
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381. Thickness effect on the viscoelastic properties of polystyrene thin films as measured by thermal wrinkling
Topic: Materials Science
Published: 12/29/2010
Authors: Edwin P Chan, Santanu S. Kundu, Qinhuang Lin, Christopher M Stafford
Abstract: The viscoelastic properties of polymer thin films can have a significant impact on the performance in many small-scale devices. In this work, we use thermal wrinkling, which is a phenomenon based on a thermally-initiated instability, to measure visco ...

382. Three dimensional optical manipulation and structural imaging of soft materials by use of laser tweezers and multimodal nonlinear microscopy
Topic: Materials Science
Published: 12/15/2010
Authors: Rahul P. Trivedi, Kristine A Bertness, Ivan I. Smalyukh
Abstract: We develop an integrated system of holographic optical trapping and multimodal nonlinear microscopy and perform simultaneous three-dimensional optical manipulation and non-invasive structural imaging of composite soft-matter systems. We combine d ...

383. Time-resolved photoluminescence of lithographically defined quantum dots fabricated by electron beam lithography and wet chemical etching
Topic: Materials Science
Published: 6/15/2011
Authors: Varun Boehm Verma, Martin J Stevens, Kevin Lawrence Silverman, Neville Dias, Akash Garg, James J. Coleman, Richard P Mirin
Abstract: We measure the time-resolved photoluminescence characteristics of a novel type of lithographically patterned quantum dot fabricated by electron beam lithography, wet chemical etching, and overgrowth of the barrier layers by metalorganic chemical ...

384. Tooth chipping can reveal bite forces and diets of fossil hominins
Topic: Materials Science
Published: 6/16/2010
Authors: Paul Constantino, James J. Lee, H Chai, Bernhard Zipfel, Charles Ziscovici, Brian Ronald Lawn, Peter Lucas
Abstract: Fossil hominin tooth enamel often exhibits antemortem edge chipping (Robinson 1954; Tobias 1967; Wallace 1973). Here we apply a simple fracture equation to estimate peak bite forces from the sizes of such chips. This equation, previously validated ...

385. Towards a Reference Polyurethane Foam and Bench Scale Test for Assessing Smoldering in Upholstered Furniture
Topic: Materials Science
Published: 12/8/2013
Authors: Mauro Zammarano, Szabolcs Matko, William M Pitts, Douglas Matthew Fox, Rick D Davis
Abstract: Smoldering poses a severe fire hazard due to the potentially lethal amount of toxic carbon monoxide released, and the possibility to reach flashover (through transition from smoldering to flaming) with heat sources otherwise too weak to directly ...

386. Towards the Integration of Carbon Nanotubes as Vias in Monolithic 3D Integrated Circuits
Topic: Materials Science
Published: 3/21/2013
Authors: Ann Chiaramonti Chiaramonti Debay, Sten Vollebregt, Johan van der Cingel , Kees Beenakker, R. Ishihara
Abstract: Carbon nanotubes (CNT) can be an attractive candidate for vertical interconnects (vias) in 3D integrated circuits due to their excellent thermal and electrical properties. To investigate CNT electrical resistivity, test vias were fabricated using b ...

387. Transmission EBSD in the Scanning Electron Microscope
Topic: Materials Science
Published: 5/1/2013
Authors: Roy Howard Geiss, Katherine P. Rice, Robert R Keller
Abstract: A new method for obtaining Kikuchi diffraction patterns from thin specimens in transmission has been developed for use in the SEM, scanning electron microscope, using a conventional electron backscatter diffraction (EBSD) detector and with a slight m ...

388. Transverse Fracture of Brittle Bilayers Relevance to Failure of All-Ceramic Dental Crowns
Topic: Materials Science
Published: 3/1/2006
Authors: Jeonghwan Kim, Sanjit Bhowmick, Ilja Hermann, Brian Ronald Lawn
Abstract: A study is made of the behavior of cracks approaching interfaces in all-ceramic crown-like bilayers. Flat specimens are fabricated by fusing porcelain veneers onto Y-TZP and alumina core ceramic plates, with veneer/core matching to minimize residual ...

389. Tunable Ionic-Conductivity of Collapsed Sandia Octahedral Molecular Sieves (SOMS)
Topic: Materials Science
Published: 9/12/2007
Authors: Jason D Pless, Terry J Garino, James E Maslar, Tina M Nenoff
Abstract: The structure-property relationship between atomic cation substitution and bulk scale conductivity in perovskites has been studied systematically. A series of Na-Nb perovskites has been synthesized via two methods (1) ion-exchange or (2) synthetic me ...

390. Tuning Polymer Melt Fragility With Antiplasticizer Additives
Topic: Materials Science
Published: 6/19/2007
Authors: Robert A Riggleman, Jack F Douglas, J J de Pablo
Abstract: A polymer-diluent model exhibiting antiplasticization has beendeveloped and characterized by molecular dynamics simulations. Antiplasticizer molecules are shown to decrease the glass transition temperature Tg, but to increase the elastic moduli o ...

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