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Proceedings Paper

Low-power microsensors for explosives and nerve warfare agents using silicon nanodots and nanowires
Author(s): Michael J. Sailor; William C. Trogler; Sonia Letant; Honglae Sohn; Stephane Content; Thomas A. Schmedake; Jun Gao; Peter Zmolek; Jamie R. Link; Yeshaiahu Fainman; Fang Xu; Paul E. Shames
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Paper Abstract

Nanocrystalline porous silicon films (nanodots) and polymeric silicon wires (nanowires) have been used to detect chemicals in gas and liquid phase. Transduction mechanisms using quantum confinement derived photoluminescence and optical reflectivity have been used. Photoluminescence intensity is modulated by energy or electron transfer induced quenching, and a shift of the Fabry-Perot reflectivity fringes from thin nanocrystalline films occurs upon molecular absorption. Examples of irreversible detection and reversible sensing modes for explosives, nerve warfare agents, and various odors of commercial interest will be provided. A catalyst can be incorporated into the nanomaterials to provide specificity for the analyte of interest.

Paper Details

Date Published: 27 September 2001
PDF: 13 pages
Proc. SPIE 4393, Unattended Ground Sensor Technologies and Applications III, (27 September 2001); doi: 10.1117/12.441265
Show Author Affiliations
Michael J. Sailor, Univ. of California/San Diego (United States)
William C. Trogler, 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)
Stephane Content, Univ. of California/San Diego (United States)
Thomas A. Schmedake, Univ. of California/San Diego (United States)
Jun Gao, Univ. of California/San Diego (United States)
Peter Zmolek, Univ. of California/San Diego (United States)
Jamie R. Link, Univ. of California/San Diego (United States)
Yeshaiahu Fainman, Univ. of California/San Diego (United States)
Fang Xu, Univ. of California/San Diego (United States)
Paul E. Shames, Univ. of California/San Diego (United States)


Published in SPIE Proceedings Vol. 4393:
Unattended Ground Sensor Technologies and Applications III
Edward M. Carapezza, Editor(s)

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