An optoelectronic nose for identification of explosives† †Electronic supplementary information (ESI) available: Sampling details, handheld reader details, additional array response data, PCA component score plots, 1H-NMR of DMDNB and PETN. See DOI: 10.1039/c5sc02632f

A portable optoelectronic nose for the identification of explosives uses a highly cross-reactive colorimetric sensor array and a handheld scanner.

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