Swati, G. and Bishnoi, Swati and Singh, Paramjeet and Lohia, Naina and Jaiswal, Vishnu V. and Dalaia, M. K. and Haranath, D. (2018) Chemistry of extracting high-contrast invisible fingerprints from transparent and colored substrates using a novel phosphorescent label. Analytical Methods, 10 (3). pp. 308-313. ISSN 1759-9660

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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.

Item Type: Article
Additional Information: Copyright for this article belongs to M/s Royal Society of Chemistry.
Subjects: Chemistry > Analytical Chemistry
Food Science & Technology
Depositing User: Mr. Yogesh Joshi
Date Deposited: 31 Jan 2020 11:26
Last Modified: 31 Jan 2020 11:26
URI: http://npl.csircentral.net/id/eprint/4090

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