Citation: Yuqin Li, Chaoying Xu, Chang Shu, Xiandeng Hou, Peng Wu. Simultaneous extraction of level 2 and level 3 characteristics from latent fingerprints imaged with quantum dots for improved fingerprint analysisc[J]. Chinese Chemical Letters, ;2017, 28(10): 1961-1964. doi: 10.1016/j.cclet.2017.04.027 shu

Simultaneous extraction of level 2 and level 3 characteristics from latent fingerprints imaged with quantum dots for improved fingerprint analysisc

Yuqin Li ^a ,
Chaoying Xu ^b ,
Chang Shu ^c,, ,
Xiandeng Hou ^a ,
Peng Wu ^a,,

a.
Analytical & Testing Center, Sichuan University, Chengdu 610064, China
b.
Department of Forensic Medicine, North Sichuan Medical College, Nanchong 637000, China
c.
School of Communication and Information Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China

Corresponding author: Chang Shu, changshu@uestc.edu.cn Peng Wu, wupeng@scu.edu.cn; wupeng522@gmail.com
Received Date: 16 March 2017
Revised Date: 12 April 2017
Accepted Date: 18 April 2017
Available Online: 29 October 2017

Figures(4)

Fingerprints are unique and life-long to everyone, so they occupy very important statuses in forensic science. However, due to the limit of current imaging technologies and instruments, recognition and matching of fingerprints are mostly based on their level 2 structures (bifurcation, crossover, and etc.). Moreover, in real-world cases, fingerprints collected in the field are often incomplete or damaged, which adds further difficulty in fingerprint analysis. Quantum dots (QDs) are superior fluorescent imaging agents for latent fingerprints, which can provide both level 2 and level 3 (sweat pores) details. Here, we used red-emitting N-acetylcysteine-capped CdTe QDs as imaging agent for staining of eccrine LFPs. The numbers of level 2 and level 3 features that can be mapped are significantly larger than those obtained by cyanoacrylate fuming, a standard technique being adopted at forensic scene. Therefore, the level 2 and level 3 characteristics from QD-staining were simultaneously extracted for improved fingerprint analysis. A preliminary fingerprint matching based modified Pore Matching algorithm was thus developed based on the integration of both level 2 and level 3 characteristics. Satisfactory results of fingerprint matching were obtained, demonstrating the advantage of the QD-staining for advanced fingerprint analysis.
- Quantum dots,
- Latent fingerprints,
- Sweat pore,
- Fluorescent imaging,
- Fingerprint matching
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