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Proceedings Paper

Detection of DNT, TNT, HF, and nerve agents using photoluminescence and interferometry from a porous silicon chip
Author(s): Michael J. Sailor; William C. Trogler; Stephane Content; Sonia Letant; Honglae Sohn; Yeshaiahu Fainman; Paul E. Shames
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Paper Abstract

Porous silicon chips have been used to detect vapors of explosives and a simulant for the nerve agents Sarin, Soman, and GF using two different transduction modes: reflectivity and photoluminescence. Detection of nitroaromatic compounds is achieved by monitoring the photoluminescence of a nanocrystalline porous Si film on exposure to the analyte of interest in a flowing air stream. Photoluminescence is quenched on exposure to the nitroaromatic. Detection limits of 2 ppb and 1 ppb were observed for 2,4-dinitrotoluene, and 2,4,6-trinitrotoluene, respectively (exposure times of 5 min for each, in air). Specificity for detection is achieved in a two-channel system using catalytic oxidation of the nitroaromatic.

Paper Details

Date Published: 21 July 2000
PDF: 10 pages
Proc. SPIE 4040, Unattended Ground Sensor Technologies and Applications II, (21 July 2000); doi: 10.1117/12.392559
Show Author Affiliations
Michael J. Sailor, Univ. of California/San Diego (United States)
William C. Trogler, Univ. of California/San Diego (United States)
Stephane Content, Univ. of California/San Diego (United States)
Sonia Letant, Univ. of California/San Diego (United States)
Honglae Sohn, Univ. of California/San Diego (United States)
Yeshaiahu Fainman, Univ. of California/San Diego (United States)
Paul E. Shames, Univ. of California/San Diego (United States)


Published in SPIE Proceedings Vol. 4040:
Unattended Ground Sensor Technologies and Applications II
Edward M. Carapezza; Todd M. Hintz, Editor(s)

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