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You searched on: Author: daniel fischer

Displaying records 191 to 200 of 211 records.
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191. Effects of Wear Motion on Ultra High Molecular Weight Polyethylene (HMWPE) Molecular Orientation
Published: 1/28/1999
Authors: S Sambasivan, Daniel A Fischer, M C Shen, Stephen M. Hsu
Abstract: In a human hip joint, the motion is complex and consists of flexion/extension, abduction, and adduction. Laboratory studies have shown that these motions increase wear significantly. The aim of this study is to measure the change in molecular orien ...

192. Morphology of Polyethylene-Carbon Black Composites
Published: 11/1/1998
Authors: G Beaucage, Daniel A Fischer, Gabrielle Gibbs Long, S Rane, D W Schaefer
Abstract: Carbon black is a common polymer additive that is used for reforcement and for its ability to enhance physical properties such as conductivity. This paper pertains to a small-angle x-ray scattering [SAXS] study of a conductive grade of carbon black ...

193. An X-Ray Absorption Study of Stoichiometry and Bonding in the Maagnetocaloric Antiperovskite Mn^d3^GaC
Published: Date unknown
Authors: L H Lewis, D Yoder, A R Moodenbaugh, Daniel A Fischer, M-H Yu
Abstract: The effects of carbon content were studied with magnetic and spectroscopic techniques in the imtermetallic perovskite compounds Mn3GaC, Mn3GaC0.90, and Mn3GaC0.78. Mn3GaC undergoes a first order magnetic transition near 160 K which is associated wit ...

194. Carbon Monoxide Oxidation Over a Pt/A1^d2^O^d3^ Catalyst: Temperature Programmed Studies Over an Extended Coverage Range
Published: Date unknown
Authors: D J Burnett, Daniel A Fischer, J L Gland
Abstract: Temperature programmed reaction spectroscopy (TPRS) experiments were performed on a 4.8 wt % Pt/Al2O3 catalyst to characterize carbon monoxide oxidation. CO and oxygen desorption experiments were performed to characterize the platinum surface in the ...

195. Chemical Analysis of HfO^d2^/ Si (100) Film Systems Exposed to NH^d3^ Thermal Processing
Published: Date unknown
Authors: Patrick S Lysaght, Joseph C Woicik, Daniel A Fischer, Gennadi Bersuker, Joel Barnett, Brendan Foran, Hsing-Huang Tseng, Raj Jammy
Abstract: Nitrogen incorporation in HfO2/SiO2 films utilized as high-k gate dielectric layers in advanced metal-oxide field-effect transistors (MOSFETs) has been investigated. Thin HfO2 blanket films deposited by atomic layer deposition on either SiO2 or NH3 t ...

196. Colliding Self-Assembly Waves in Organosilane Monolayers
Published: Date unknown
Authors: K Efimenko, Ali Ozcam, Jan Genzer, Daniel A Fischer, Frederick R Phelan Jr., Jack F Douglas
Abstract: Colliding autocatalytic wave-fronts of organosilane (OS) layer self-assembly are generated through the controlled positioning of sources of the volatile OS material at the edges of a silica wafer and through adjustment of the container dimensions in ...

197. Development of Multilayer Analyzer Array Detectors for X-Ray Fluorescence at the Third Generation Synchrotron Source
Published: Date unknown
Authors: K Zhang, G Rosenbaum, R Liu, G Bunker, C Y Liu, Daniel A Fischer
Abstract: The development of Multilayer Analyzer Array Detector (MADD) for X-ray fluorescence is to eliminate the count rate limitation encountered with the multi-element Ge detector. A 24-element multilayer detector has been fabricated which is tunable in a ...

198. Direct Observation of Room Temperature Propylene Adsorption and Rehybridization on Supported Silver Using Synchrotron Radiation
Published: Date unknown
Authors: J T Ranney, Daniel A Fischer, D H Parker, R G Bowman, G E Hartwell, J L Gland
Abstract: The room-temperature chemisorption and rehybridization of propylene on dispersed silver supported on TiO^d2^ [anatase] has been observed for the first time. Adsorbed organic intermediates are likely to play an important role in catalytic partial oxi ...

199. Functional Oligothiophenes for Use in Self-Assembled Monolayer Field-Effect Transistors
Published: Date unknown
Authors: A R. Murphy, Clayton Mauldin, J M. Frechet, Paul C Chang, Kanan Putambekar, Kin-Yip Phoa, V Subramanian, Dean M DeLongchamp, Daniel A Fischer, Eric K Lin
Abstract: Asymmetric, end-functionalized thiophene oligomers capable of self-assembly and covalent bonding to silicon surfaces have been synthesized. Monolayer films were made using solution or Langmuir-Blodgett deposition techniques. Characterization of the f ...

200. High-resolution x-ray emission spectroscopy with transition-edge sensors, present performance and future potential
Published: Date unknown
Authors: William B Doriese, Joseph Westbrook Fowler, Daniel S Swetz, Cherno Jaye, Daniel A Fischer, Carl D Reintsema, Douglas A Bennett, Leila R Vale, Gene C Hilton, Daniel R Schmidt, Joel Nathan Ullom, Jens Uhlig, ujjwal mandal, wilfrid fullagar, Fredrick Parnefjord Gustafsson, Dharma Kurunthu, Villy Sundstrom
Abstract: X-ray emission spectroscopy (XES) is a powerful element-selective tool to analyze the oxidation states of atoms in complex compounds, determine their electronic configuration, and identify unknown compounds in challenging environments. Until now the ...

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