Objective To introduce a new method for latent fingerprints developing by using NaYF4:Er,Yb phosphor suspension,and explore its applicable scope and conditions. Methods The sebaceous fingerprints on non-porous surfaces, including plastic, tile, glass, metal et al. were developed with NaYF4:Er,Yb phosphor suspension. Results The sebaceous fingerprints on non-porous objects with complex background were developed successfully. The effectiveness of NaYF4:Er,Yb was compared with that of traditional Zinc Oxide powder, the results indicated that some benefit of NaYF4:Er,Yb over Zinc Oxide powder for the development of latent fingerprints. Conclusions NaYF4:Er,Yb phosphor suspension is a simple and effective method for fingerprints detection, and has the great potential for development of latent fingerprints.
Key words
fingerprint development /
up-converter particles /
sebaceous fingerprints /
fluorescence
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Footnotes
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