Application of CdSe quantum dots for the direct detection of TNT

Forensic Science International : Synergy
Kui-Yu Yi

Abstract

CdSe quantum dots were synthesized through a simple, green organic-phase method. Paraffin was used as the reaction solvent and a reducing agent, oleic acid was the reaction ligand, and oleyl amine was the stabilizer. Based on the phenomenon of TNT quenched oil-soluble CdSe quantum dot fluorescence, a simple, fast, and direct method of TNT detection was established. Under optimum conditions, the degree of fluorescence quenching of oil-soluble CdSe quantum dots had a good linear correlation with TNT concentration in the 1.0×10(-7)-5.0×10(-5) mol/L range, and the correlation coefficient was 0.9990. TNT detection limit was 2.1×10(-8)mol/L. The method was successfully used to determine TNT-explosion dust samples, results were satisfactory. The fluorescence quenching mechanism of oil-soluble CdSe quantum dots by TNT was also discussed.

References

Jul 21, 2006·The Journal of Physical Chemistry. B·Zhengtao DengBingsuo Zou
Jul 17, 2007·Journal of Hazardous Materials· GauravP K Rai
Sep 10, 2009·Journal of the American Chemical Society·Samuel S R DasaryParesh Chandra Ray
Jul 23, 2014·Forensic Science International : Synergy·Rajnish KaurAkash Deep

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