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Issue 3, 2018
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Chemistry of extracting high-contrast invisible fingerprints from transparent and colored substrates using a novel phosphorescent label

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Abstract

Traditionally used fluorescent powders for developing invisible (latent) fingerprints involve complicated operation and show characteristics of auto-fluorescence interference and high toxicity. To overcome these serious drawbacks we report a novel application and facile methodology to extract high contrast fingerprints on non-porous and porous substrates using a chemically inert, visible light excitable, and nanosized SrAl2O4:Eu2+,Dy3+ phosphorescent label in the dark. The chemistry of non-covalent physisorption interaction between the long afterglow phosphor powder and sweat residue in fingerprints has been discussed in detail. Real-time fingerprint development on porous and non-porous substrates has also been performed.

Graphical abstract: Chemistry of extracting high-contrast invisible fingerprints from transparent and colored substrates using a novel phosphorescent label

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Publication details

The article was received on 24 Nov 2017, accepted on 25 Nov 2017 and first published on 11 Dec 2017


Article type: Paper
DOI: 10.1039/C7AY02713C
Citation: Anal. Methods, 2018,10, 308-313
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    Chemistry of extracting high-contrast invisible fingerprints from transparent and colored substrates using a novel phosphorescent label

    G. Swati, S. Bishnoi, P. Singh, N. Lohia, V. V. Jaiswal, M. K. Dalai and D. Haranath, Anal. Methods, 2018, 10, 308
    DOI: 10.1039/C7AY02713C

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