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Issue 1, 2016
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An optoelectronic nose for identification of explosives

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Abstract

Compact and portable methods for identification of explosives are increasingly needed for both civilian and military applications. A portable optoelectronic nose for the gas-phase identification of explosive materials is described that uses a highly cross-reactive colorimetric sensor array and a handheld scanner. The array probes a wide range of chemical reactivities using 40 chemically responsive colorimetric indicators, including pH sensors, metal–dye salts, redox-sensitive chromogenic compounds, solvatochromic dyes, and other chromogenic indicators. Sixteen separate analytes including common explosives, homemade explosives, and characteristic explosive components were differentiated into fourteen separate classes with a classification error rate of <1%. Portable colorimetric array sensing could represent an important, complementary part of the toolbox used in practical applications of explosives detection and identification.

Graphical abstract: An optoelectronic nose for identification of explosives

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Publication details

The article was received on 20 Jul 2015, accepted on 22 Sep 2015 and first published on 07 Oct 2015


Article type: Edge Article
DOI: 10.1039/C5SC02632F
Citation: Chem. Sci., 2016,7, 199-206
  • Open access: Creative Commons BY license
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    An optoelectronic nose for identification of explosives

    J. R. Askim, Z. Li, M. K. LaGasse, J. M. Rankin and K. S. Suslick, Chem. Sci., 2016, 7, 199
    DOI: 10.1039/C5SC02632F

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