期刊
CHEMICAL SCIENCE
卷 7, 期 1, 页码 199-206出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5sc02632f
关键词
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资金
- U.S. NSF [CHE-1152232]
- U.S. Dept. of Defense [CTTSO/JIEDDO CB3614]
- Robert C. and Carolyn J. Springborn Endowment
- NSF-GRFP [DGE-1144245]
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.
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