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Ultra-portable explosives sensor based on a CMOS fluorescence lifetime analysis micro-system

Wang, Yue and Rae, B.R. and Henderson, R.K. and Gong, Zheng and Mckendry, Jonathan and Gu, Erdan and Dawson, Martin and Turnbull, Graham A. and Samuel, Ifor D. W. (2011) Ultra-portable explosives sensor based on a CMOS fluorescence lifetime analysis micro-system. AIP Advances, 1 (3).

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Abstract

This work explores the use of a green-light-emitting copolymer as a chemosensor to detect nitroaromatic-based explosive vapors by recording photoluminescence (PL) and time-resolved PL decay. We show successful detection of 10 ppb 1,4-dinitrobenzene (DNB) vapor. Both a conventional time-correlated single photon counting (TCSPC) device and CMOS time-resolved fluorescence lifetime micro-system are used in the DNB detection. An ultra-portable on-site explosive sensor based on the micro-system has also been demonstrated. This gives rise to the potential for real-time, reliable, inexpensive organic/inorganic hybrid explosives detection.