Facile LaOF: Sm 3+ based labeling agent and their applications in residue chemistry of latent fingerprint and cheiloscopy under UV–visible light

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Abstract

Luminescent lanthanum oxyfluoride nano inorganic materials were considered to be prospective building blocks for multifunctional applications. This offers new potentials in surface-based science comprising of visualization of latent fingerprint (LFPs) and lips print on non-porous surfaces. Traditional visualization techniques possess high backward hindrance, low sensitivity, complicated setup and poor visibility. To overcome with these problems, LaOF:Sm 3+ (5 mol%) nanopowder (NPs) prepared via sonochemical route were explored. Photoluminescence (PL) emission spectra exhibit strong emission peaks at ∼566 nm, 607 nm, 653 nm and 708 nm attributed to 4 G 5/2 → 6 H 5/2 , 4 G 5/2 → 4 H 7/2 , 4 G 5/2 → 6 H 9/2 and 4 G 5/2 → 6 H 11/2 intra-4f orbital transitions of Sm 3+ ions respectively. Estimated photometric properties confirm that the material emits warm orange red color. Therefore, the synthesized phosphor materials may quite be useful for LFPs recovery, cheiloscopy and optoelectronics applications.

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Suresh, C., Nagabhushana, H., Darshan, G. P., Basavaraj, R. B., Kavyashree, D., Sharma, S. C., … Amith Yadav, H. J. (2018). Facile LaOF: Sm 3+ based labeling agent and their applications in residue chemistry of latent fingerprint and cheiloscopy under UV–visible light. Arabian Journal of Chemistry, 11(4), 460–482. https://doi.org/10.1016/j.arabjc.2017.09.014

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