Journal
DYES AND PIGMENTS
Volume 134, Issue -, Pages 178-185Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2016.07.014
Keywords
Upconversion nanorod; Fluorescent label; Blood fingerprint; Criminal science
Funding
- National Natural Science Foundation of China [21573040, 21301027]
- Natural Science Foundation
- Science and Technology Development Planning of Jilin Province [20140520088JH, 20150204086GX]
- Program for New Century Excellent Talents in University [NCET-13-0720]
- National Hi-Technology Research and Development Program (863 Program) [2013AA032204]
- Fundamental Research Funds for the Central Universities [2412016KJ007, 2412016KJ020]
- Jilin Provincial Key Laboratory of Micro-Nano Functional Materials (Northeast Normal University)
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In this paper, the NaYF4:Yb,Er,Gd fluorescent upconversion nanorods (UCNRs) were successfully employed as a promising fluorescent label for the detection of blood fingerprints with high sensitivity, low background, high efficiency, and low toxicity on a range of substrates including non-infiltrating materials (glass, ceramic tile, aluminium foil, stainless steel sheet, coin and marble), and infiltrating materials (magazine cover and train ticket). To assess the efficiency of this approach, comparisons were performed with Acid Yellow 7 (AY7, an effective blood reagent) on above-mentioned eight substrates. The fingerprints were cut in halves and the halves treated separately with UCNRs and AY7. The results manifested that UCNRs were superior to AY7 on all test substrates. This work shows that UCNRs are a versatile fluorescent label for the detection of blood fingerprints in criminal science for individual identification. (C) 2016 Elsevier Ltd. All rights reserved.
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