News Column

New Analytical Chemistry Study Findings Have Been Reported by C.Y. Xu and Co-Researchers

May 20, 2014

By a News Reporter-Staff News Editor at Life Science Weekly -- A new study on Analytical Chemistry is now available. According to news reporting out of Chongqing, People's Republic of China, by NewsRx editors, research stated, "Fingerprints are unique characteristics of an individual, and their imaging and recognition is a top-priority task in forensic science. Fast LFP (latent fingerprint) acquirement can greatly help policemen in screening the potential criminal scenes and capturing fingerprint clues."

Our news journalists obtained a quote from the research, "Of the two major latent fingerprints (LFP), eccrine is expected to be more representative than sebaceous in LFP identification. Here we explored the heavy metal-free Mn-doped ZnS quantum dots (QDs) as a new imaging moiety for eccrine LFPs. To study the effects of different ligands on the LFP image quality, we prepared Mn-doped ZnS QDs with various surface-capping ligands using QDs synthesized in high-temperature organic media as starting material. The orange fluorescence emission from Mn-doped ZnS QDs clearly revealed the optical images of eccrine LFPs. Interestingly, N-acetyl-cysteine-capped Mn-doped ZnS QDs could stain the eccrine LFPs in as fast as 5 s. Meanwhile, the levels 2 and 3 substructures of the fingerprints could also be simultaneously and clearly identified. While in the absence of QDs or without rubbing and stamping the finger onto foil, no fluorescent fingerprint images could be visualized. Besides fresh fingerprint, aged (5, 10, and 50 days), incomplete eccrine LFPs could also be successfully stained with N-acetyl-cysteine-capped Mn-doped ZnS QDs, demonstrating the analytical potential of this method in real world applications."

According to the news editors, the research concluded: "The method was also robust for imaging of eccrine LFPs on a series of nonporous surfaces, such as aluminum foil, compact discs, glass, and black plastic bags."

For more information on this research see: Fast Imaging of Eccrine Latent Fingerprints with Nontoxic Mn-Doped ZnS QDS. Analytical Chemistry, 2014;86(7):3279-3283. Analytical Chemistry can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society -; Analytical Chemistry -

Our news journalists report that additional information may be obtained by contacting C.Y. Xu, Chongqing Zhongxian Police Secur Bur, Criminal Sci & Technol Studio, Chongqing 404300, People's Republic of China. Additional authors for this research include R.H. Zhou, W.W. He, L. Wu, P. Wu and X.D. Hou (see also Analytical Chemistry).

Keywords for this news article include: Asia, Chongqing, Analytical Chemistry, People's Republic of China

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Source: Life Science Weekly

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