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Towards Fingermark Dating: A Raman Spectroscopy Proof-of-Concept Study
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences. FOI Swedish Def Res Agcy, CBRN Def & Secur, SE-90182 Umea, Sweden.
FOI Swedish Def Res Agcy, CBRN Def & Secur, SE-90182 Umea, Sweden..
Swedish Armed Forces, Natl CBRN Def Ctr, SE-90182 Umea, Sweden..
FOI Swedish Def Res Agcy, CBRN Def & Secur, SE-90182 Umea, Sweden..
2017 (English)In: ChemistryOpen, ISSN 2191-1363, Vol. 6, no 6, p. 706-709Article in journal (Refereed) Published
Abstract [en]

Fingermarks have, for a long time, been vital in the forensic community for the identification of individuals, and a possibility to non-destructively date the fingermarks would of course be beneficial. Raman spectroscopy is, herein, evaluated for the purpose of estimating the age of fingermarks deposits. Well-resolved spectra were non-destructively acquired to reveal spectral uniqueness, resembling those of epidermis, and several molecular markers were identified that showed different decay kinetics: carotenoids > squalene > unsaturated fatty acids > proteins. The degradation rates were accelerated, less pronounced for proteins, when samples were stored under ambient light conditions, likely owing to photo-oxidation. It is hypothesized that fibrous proteins are present and that oxidation of amino acid side chains can be observed both through Raman and fluorescence spectroscopy. Clearly, Raman spectroscopy is a useful technique to non-destructively study the aging processes of fingermarks.

Place, publisher, year, edition, pages
2017. Vol. 6, no 6, p. 706-709
Keywords [en]
aging, fingermarks, fluorescence spectroscopy, forensics, Raman spectroscopy
National Category
Physical Chemistry Engineering and Technology
Identifiers
URN: urn:nbn:se:uu:diva-344214DOI: 10.1002/open.201700129ISI: 000417081100004PubMedID: 29226058OAI: oai:DiVA.org:uu-344214DiVA, id: diva2:1188046
Funder
Swedish Civil Contingencies AgencyAvailable from: 2018-03-06 Created: 2018-03-06 Last updated: 2018-05-03Bibliographically approved

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