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Displaying 926 - 950 of 1931

Chemical Warfare Agent Detection Using MEMS Microsensor Arrays

August 1, 2005
Author(s)
Douglas C. Meier, C J. Taylor, Richard E. Cavicchi, Edward White V, M W. Ellzy, K B. Sumpter, Stephen Semancik
Chemical sensors capable of accurate detection of trace quantities of chemical warfare (CW) agents would provide a potent tool for perimeter security, treaty verification, battlefield threat detection, and the protection of civilians in public places

Chemical Warfare Agent Detection Using MEMS-Compatible Microsensor Arrays

August 1, 2005
Author(s)
Douglas C. Meier, C J. Taylor, Richard E. Cavicchi, Edward White, M W. Ellzy, K B. Sumpter, Stephen Semancik
Microsensors have been fabricated consisting of TiO2 and SnO2 sensing films prepared by chemical vapor deposition (CVD) on MEMS- (micro-electromechanical systems) compatible array platforms. Response measurements from these devices to the CW agents GA

ThermoData Engine (TDE): Software Implementation of the Dynamic Data Evaluation Concept

May 18, 2005
Author(s)
Michael D. Frenkel, Robert D. Chirico, Vladimir Diky, Xinjian Yan, Qian Dong, Chris D. Muzny
The first full-scale software implementation of the dynamic data evaluation concept {ThermoData Engine (TDE)} is described for thermophysical and thermochemical property data. This concept requires the development of large electronic databases capable of

In Situ Ellipsometric Study of PEG/Cl - Coadsorption on Cu, Ag, and Au

May 1, 2005
Author(s)
Marlon L. Walker, Lee J. Richter, Thomas P. Moffat
Spectroscopic ellipsometry was used to examine the adsorption of polyethylene glycol (PEG) and Cl- on polycrystalline Cu, Ag and Au electrodes in sulfuric acid. In halide-free sulfuric acid, PEG adsorption on Cu and Ag is minimal at potentials positive of

Reaction gas chromatography/mass spectrometry. 2-the use of catalytic on-line dehydrogenation for the investigation of alcohols by gas chromatography/mass spectrometry

April 7, 2005
Author(s)
Anzor Mikaia, Vladimir Smetanin, Vladimir G. Zaikin, Alla V. Antonova, Nikolay A. Prostakov
A GC-MS method is developed for structure determination of aliphatic within mixtures. It involves online application of a gas-phase dehydrogenation reaction after GC separation and before MS analysis. Primary and secondary alcohols are converted into

Thermodynamic Properties of Diphenylmethane

March 30, 2005
Author(s)
Robert D. Chirico, William Steele
Measurements leading to the calculation of the standard thermodynamic properties for gaseous diphenylmethane (Chemical Abstracts registry number [101-81-5]) are reported. Experimental methods include adiabatic heat-capacity calorimetry, vibrating-tube

High Spatial Resolution Quantitative Electron Beam Microanalysis for Nanoscale Materials

March 21, 2005
Author(s)
Dale E. Newbury, J H. Scott, Scott A. Wight, J T. Armstrong, John A. Small
Transmission (TEM) and scanning electron microscopes (SEM) provide ideal platforms for electron and x-ray spectrometry to characterize nanoscale particles and nanostructured bulk materials. Electron spectrometry includes electron energy loss spectrometry

Thermal decomposition kinetics of RP-1 rocket propellant

March 16, 2005
Author(s)
Peter C. Andersen, Thomas J. Bruno
As part of a thermophysical and transport property measurement project, the global decomposition kinetics of the kerosene based rocket propellant, RP-1, was investigated. We measured the decomposition of RP-1 at elevated temperatures (that is, under
Displaying 926 - 950 of 1931
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