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Displaying 726 - 750 of 2634

Strength distribution of single-crystal silicon theta-like specimens

May 18, 2010
Author(s)
Michael S. Gaither, Frank W. DelRio, Richard S. Gates, Edwin R. Fuller, Robert F. Cook
A new test specimen has been developed for micro-scale tensile strength measurements, allowing direct assessment of surface effects on strength. Specimens were formed by deep reactive ion etching, tested with instrumented indentation, and test results

GRADED STRUCTURES FOR ALL-CERAMIC RESTORATIONS

May 17, 2010
Author(s)
Yu Zhang, H Chai, Brian R. Lawn
One failure mode of all-ceramic crown restorations is radial cracking at the cementation surface, from occlusally-induced flexure of the stiffer crown layer on the softer dentin underlayer. We hypothesize that such failure may be substantially mitigated by

Simultaneous XAFS Measurements of Multiple Samples

May 17, 2010
Author(s)
Bruce D. Ravel, C. Scorzato, D. P. Siddons, S. D. Kelly, S. R. Bare
A four-channel ionization chamber has been designed, constructed and tested. This ionization chamber allows X-ray absorption spectra to be collected in transmission from up to four samples simultaneously. This results in spectra that are free of systematic

Synthesis and properties of turbostratically disordered,ultrathin WSe2 films

May 11, 2010
Author(s)
Ngoc Nguyen, Polly Berseth, Qiyin Lin, Catalin Chiritescu, D.G. Cahill, Anastassios Mavrokefalos, Li Shi, Paul Zschack, Michael D. Anderson, Ian M. Anderson, David C. Johnson
Turbostratically disordered tungsten diselenide (WSe2) thin films with as few as two c-axis-oriented (basal plane) structural units were synthesized from modulated elemental reactants. By varying the number of elemental W-Se bilayers deposited, the

Deactivation of Sub-Melt Laser Annealed Arsenic Ultra Shallow Junctions in Silicon During Subsequent Thermal Treatment

May 4, 2010
Author(s)
Joseph C. Woicik, D. Giubertoni, G. Pepponi, S. Gennaro, M. Bersani, M. A. Sahiner, S. P. Kelty, M. Kah, K. J. Kirkby, R. Doherty, M. A. Foad, F. Meirer, C. Streli, P. Pianetta
The use of non-equilibrium annealing approaches can produce a very high level of arsenic electrical activation in Si but subsequent thermal treatments between 500 and 800 C easily deactivate the dopant to a level one order of magnitude below the solid

Machine Learning Study of the Heulandite Family of Zeolites

May 1, 2010
Author(s)
Shujiang Yang, Mohammed Lach-hab, Estela Blaisten-Barojas, Xiang Li, Vicky L. Karen
Heulandite and clinoptilolite form the most abundant family of natural zeolite crystals. The topology of both of them is characterized by the framework type HEU. Despite many studies on these crystals, the mineral assignment to a zeolite as heulandite or

Manipulation of crystallinity boundary via process space investigations of pulsed laser deposited high-k HfO2-TiO2-Y2O3 combinatorial thin films

March 10, 2010
Author(s)
Jennifer L. Klamo, Peter K. Schenck, Peter G. Burke, Kao-Shuo Chang, Martin L. Green
Combinatorial library films of HfO2-TiO2-Y2O3, a high-k dielectric system, grown by pulsed laser deposition, exhibit visible boundary lines separating amorphous and crystalline phases. By changing processing space parameters, specifically substrate

Theta-like specimen to determine tensile strength at the micro-scale

March 10, 2010
Author(s)
Michael S. Gaither, Frank W. DelRio, Richard S. Gates, Edwin R. Fuller, Robert F. Cook
Micro- and nano-electromechanical systems are typically formed via lithographic and etching processes that leave residual surface features, stresses, and chemistry that ultimately control component strength and device reliability. Here, we describe a new

Broadband Characterization of Individual Platinum Nanowires

March 7, 2010
Author(s)
Kichul Kim, Thomas M. Wallis, Paul Rice, Chin J. Chiang, Atif A. Imtiaz, Pavel Kabos, Dejan Filipovic
Conductivity and contact resistance of 100 nm and 250 nm diameter platinum (Pt) nanowires (NWs) are investigated computationally and experimentally. Finite element method based full-wave modeling and circuit simulations are used in conjunction with

Rational synthesis and characterization of a new family of low thermal conductivity misfit layered compounds [(PbSe)0.99]m[(WSe2)]n

February 9, 2010
Author(s)
Ian M. Anderson, Michael D. Anderson, Qiyin Lin, Mary Smeller, Colby L. Heideman, Paul Zschack, Mikio Koyano, Robert Kykyneshi, Douglas A. Keszler, David C. Johnson
We describe here a general synthesis approach for the preparation of new families of misfit layer compounds and demonstrate its effectiveness through the preparation of the first 64 members of the [(PbSe)0.99]m(WSe2)n family of compounds, where m and n are

EXAFS Studies of Catalytic DNA Sensors for Mercury Contamination of Water

December 11, 2009
Author(s)
Bruce D. Ravel, S.C. Slimmer, X. Meng, G.C.L. Wong, Y. Lu
Monitoring of metallic contaminants in domestic and agricultural water systems systems requires technology that is fast, flexible, sensitive, and selective. Recently, metal sensors based on catalytic DNA have been demonstrated as a practical monitoring
Displaying 726 - 750 of 2634
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