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Proceedings Paper

Array-based carbon black-polymer composite vapor detectors for detection of DNT in environments containing complex analyte mixtures
Author(s): Shawn M. Briglin; Michael S. Freund; Brian C. Sisk; Nathan Saul Lewis
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Paper Abstract

Thin films of carbon black-organic polymer composites have been deposited across two metallic leads, with sorption of vapors producing swelling-induced resistance changes of the detector films. To identify and classify vapors, arrays of such vapor sensing elements have been constructed in which each element of the array contains a different polymer as the insulating phase and a common conductor, carbon black, as the conducting phase. The differing gas-solid partition coefficients for the various polymers of the detector array produce a pattern of differential resistance changes that is used to classify vapors and vapor mixtures. The performance of this detector array system towards 2,4-dinitrotoluene, the predominant signature in the vapor phase above land mines, in the presence high concentrations of water or of acetone has been evaluated.

Paper Details

Date Published: 18 October 2001
PDF: 10 pages
Proc. SPIE 4394, Detection and Remediation Technologies for Mines and Minelike Targets VI, (18 October 2001); doi: 10.1117/12.445419
Show Author Affiliations
Shawn M. Briglin, California Institute of Technology (United States)
Michael S. Freund, California Institute of Technology (United States)
Brian C. Sisk, California Institute of Technology (United States)
Nathan Saul Lewis, California Institute of Technology (United States)


Published in SPIE Proceedings Vol. 4394:
Detection and Remediation Technologies for Mines and Minelike Targets VI
Abinash C. Dubey; James F. Harvey; J. Thomas Broach; Vivian George, Editor(s)

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