Detection of DNT, TNT, HF, and nerve agents using photoluminescence and interferometry from a porous silicon chip

Michael J. Sailor; William C. Trogler; Stephane Content; Sonia Letant; Honglae Sohn; Yeshaiahu Fainman; Paul E. Shames

doi:10.1117/12.392559

21 July 2000 Detection of DNT, TNT, HF, and nerve agents using photoluminescence and interferometry from a porous silicon chip

Michael J. Sailor, William C. Trogler, Stephane Content, Sonia Letant, Honglae Sohn, Yeshaiahu Fainman, Paul E. Shames

Author Affiliations +

Proceedings Volume 4040, Unattended Ground Sensor Technologies and Applications II; (2000) https://doi.org/10.1117/12.392559
Event: AeroSense 2000, 2000, Orlando, FL, United States

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.

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Michael J. Sailor, William C. Trogler, Stephane Content, Sonia Letant, Honglae Sohn, Yeshaiahu Fainman, and Paul E. Shames "Detection of DNT, TNT, HF, and nerve agents using photoluminescence and interferometry from a porous silicon chip", Proc. SPIE 4040, Unattended Ground Sensor Technologies and Applications II, (21 July 2000); https://doi.org/10.1117/12.392559

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