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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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.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Royal Society of Chemistry.
Subjects:	Chemistry > Analytical Chemistry Food Science & Technology Spectroscopy
Divisions:	UNSPECIFIED
Depositing User:	Mr. Yogesh Joshi
Date Deposited:	04 Dec 2019 07:36
Last Modified:	04 Dec 2019 07:36
URI:	http://npl.csircentral.net/id/eprint/3874

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