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Enhanced explosive sensing based on silole-modified luminescent porous silicon

  • Original Paper - Cross-Disciplinary Physics and Related Areas of Science and Technology
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Abstract

A porous silicon sensor capable of rapidly detecting explosive vapors has been developed based on quenching fluorescence of silole-modified porous silicon (PSi). The silole-modified PSi sensor for the detecting explosives is based on FRET between silole molecule and PSi. The silole molecules and fresh PSi emit fluorescence at the wavelength of 506 and 717 nm. Surface morphologies of fresh PSi and surface-modified PSi were obtained with a cold FE-SEM. The quenching of PL is observed with increasing time of exposure to dinitrotoluene (DNT), picric acid (PA), and trinitrotoluene (TNT). The quenching efficiency as a function of time for TNT is more significant than for DNT or PA. The sensing efficiency of silole-modified PSi is much higher than that of fresh PSi for the corresponding analyte. The silole-modified PSi provides a new sensing system with high sensitivity and good selectivity for TNT.

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Acknowledgements

This research was supported (in part) by research funds from Chosun University, 2021.

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  1. Department of Chemistry, Chosun University, Gwangju, 61452, South Korea

    Honglae Sohn

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  1. Honglae Sohn
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Correspondence to Honglae Sohn.

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Sohn, H. Enhanced explosive sensing based on silole-modified luminescent porous silicon. J. Korean Phys. Soc. 80, 82–87 (2022). https://doi.org/10.1007/s40042-021-00368-9

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  • DOI: https://doi.org/10.1007/s40042-021-00368-9

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