Fingermark Detection On Non-Porous And Semi-Porous Surfaces Using Nayf(4):Er,Yb Up-Converter Particles

Elsevier Ireland Ltd
Publication Type:
Journal Article
Forensic Science International, 2011, 207 (1-Mar), pp. 145 - 149
Issue Date:
Full metadata record
Files in This Item:
Filename Description Size
Thumbnail2010004701OK.pdf383.31 kB
Adobe PDF
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.
Please use this identifier to cite or link to this item: