期刊
FORENSIC SCIENCE INTERNATIONAL
卷 207, 期 1-3, 页码 145-149出版社
ELSEVIER IRELAND LTD
DOI: 10.1016/j.forsciint.2010.09.020
关键词
Latent fingermarks; Anti-Stokes materials; Luminescence; Fingerprint powders; Cyanoacrylate stains; Sticky-side powder; Up-converters
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. (C) 2010 Elsevier Ireland Ltd. All rights reserved.
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