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Chemistry

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Displaying 1426 - 1450 of 1924

Quantitative secondary ion mass spectrometry imaging of self-assembled monolayer films for electron beam dose mapping in the environmental scanning electron microscope

July 1, 1998
Author(s)
John G. Gillen, Scott A. Wight, David S. Bright, T M. Herne
Fluorinated alkanethiol self assembled monolayers (SAM) films immobilized on gold substrates have been used as electron-sensitive resists to map quantitatively the spatial distribution of the primary electron beam scattering in an environmental scanning

Metrology: Impact on National Economy and International Trade

June 1, 1998
Author(s)
Hratch G. Semerjian, Robert L. Watters
The U.S. Federal Government has a strong role in metrology R&D in the U.S because of its importance to the nation's economy and the Constitutional authority given to the National Institute of Standards and Technology (NIST). However, pressures to maintain

Thermodynamic Properties for the Alternative Refrigerants

June 1, 1998
Author(s)
Mark O. McLinden, Eric W. Lemmon, R. T. Jacobsen
Models commonly used to calculate the thermodynamic properties of refrigerants are summarized. For pure refrigerants, the virial, cubic, Martin-Hou, Benedict-Webb-Rubin, and Helmholtz equations of state and the extended corresponding states model are

Quality Control Procedures for the NIST/EPA/NIH Mass Spectral Library

May 31, 1998
Author(s)
C L. Clifton, S G. Lias, Anzor I. Mikaia, O D. Sparkman, Stephen Stein, Dmitrii Tchekhovskoi, Damo Zhu, Vladimir G. Zaikin
The goal of quality control procedures is to produce the best possible spectra for library searching. The role of a panel of data evaluators is presented, and the plans for further improvements of the NIST/EPA/NIH mass spectral library is presented.

Atomic Hydrogen for the Formation of Abrupt Sb Doping Profiles in MBE-Grown Si

May 1, 1998
Author(s)
P E. Thompson, C Silvestre, M E. Twigg, G Jernigan, David S. Simons
Previously atomic hydrogen has been shown to be effective in reducing the segregation of Ge on Si[100] during solid source molecular beam epitaxygrowth. In this work we have investigated atomic hydrogen to determine if it is equally effective in reducing

Kinetically-Controlled Chemical Sensing Using Micromachined Structures

May 1, 1998
Author(s)
Stephen Semancik, Richard E. Cavicchi
Microdevices produced by machining silicon can offer a variety of control functionality on a miniature scale, 1.2 with general advantages connected to not only reduced size (less invasive), but also lower power requirements, lower cost, and reproducibility
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