Fingermark Detection on Non-porous and Semi-porous Surfaces using NaYF4:Er,Yb Up-converter Particles

Rongliang Ma, Elicia Bullock, Phillip Maynard, Brian Reedy, Ronald Shimmon, Christopher Lennard, Claude Roux, Andrew McDonagh

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Abstract

This article describes the first use of an anti-Stokes material, or up-converter, for the development of latent fingermarks on a range of non-porous surfaces. Anti-Stokes materials can absorb long-wavelength light and emit light at a shorter wavelength. This property is unusual in both natural and artificial materials and so fingermark detection techniques based on anti-Stokes luminescence are potentially sensitive and selective. Latent fingermarks on luminescent and non-luminescent substrates, including Australian polymer banknotes (a well-known ‘difficult’ surface), were developed with sodium yttrium tetrafluoride doped with erbium and ytterbium (NaYF4:Er,Yb) by dry powder, wet powder, and cyanoacrylate staining techniques. This study illustrates the potential of up-converter phosphors for the detection of latent fingermarks
Original languageEnglish
Pages (from-to)145-149
Number of pages5
JournalForensic Science International
Volume207
Issue number1-3
DOIs
Publication statusPublished - 2011

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Ma, R., Bullock, E., Maynard, P., Reedy, B., Shimmon, R., Lennard, C., ... McDonagh, A. (2011). Fingermark Detection on Non-porous and Semi-porous Surfaces using NaYF4:Er,Yb Up-converter Particles. Forensic Science International, 207(1-3), 145-149. https://doi.org/10.1016/j.forsciint.2010.09.020