Dual-emitting quantum dot nanohybrid for imaging of latent fingerprints: simultaneous identification of individuals and traffic light-type visualization of TNT

Peng Wu · Chaoying Xu · Xiandeng Hou · Jing‐Juan Xu · Hong‐Yuan Chen

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Forensic Fingerprint Detection Methods Quantum Dots Synthesis And Properties Luminescence and Fluorescent Materials

Abstract

, the PAA-functionalized green QDs and red QD-doped silica nanoparticles, could be explored for fingerprint imaging. Due to the formation of a Meisenheimer complex between TNT and PAA, the green-emitting QDs could be quenched by TNT, meanwhile the red-emitting QDs were inert. Therefore, the nanohybrid exhibited a traffic light-type fluorescence color change (green-yellow-red) to TNT concentration in the range of 40-400 μM. This method is promising for potential applications in security-screening needs in public areas such as airports and train stations.

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References

2012Advances in Fingerprint Analysis 2012Imaging Latent Fingerprints by Electrochemiluminescence 2007“Intelligent” Fingerprinting: Simultaneous Identification of Drug Metabolites and Individuals by Using Antibody‐Functionalized Nanoparticles 2008Metal-containing nanoparticles and nano-structured particles in fingermark detection 2013Nanoplasmonic Imaging of Latent Fingerprints and Identification of Cocaine

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