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Gonzalez, Christina M.; Iqbal, Muhammad; Dasog, Mita; Piercey, Davin G.; Lockwood, Ross; Klapötke, Thomas M.; Veinot, Jonathan G. C. (14. January 2014): Detection of high-energy compounds using photoluminescent silicon nanocrystal paper based sensors. In: Nanoscale, Vol. 6, No. 5: pp. 2608-2612




Luminescent silicon nanocrystals (Si-NCs) surface functionalized with dodecyl groups were exposed to solutions of nitroaromatic compounds including nitrobenzene, nitrotoluene, and dinitrotoluene. It was found that Si-NC luminescence was quenched upon exposure to nitroaromatics via an electron transfer mechanism as indicated by Stern-Volmer analysis. This quenching was exploited and a straightforward paper-based Si-NC sensor was developed. This paper motif was found to be sensitive to solution, vapor, and solid phase nitroaromatics, as well as solution borne RDX and PETN.