Application of CdSe quantum dots for the direct detection of TNT

被引：25

作者：

Yi, Kui-Yu ^{[1
]}

机构：

[1] Natl Police Univ China, Dept Forens Chem, Shenyang 110035, Peoples R China

来源：

FORENSIC SCIENCE INTERNATIONAL | 2016年 / 259卷

基金：

中国国家自然科学基金;

关键词：

CdSe quantum dots; Nanoparticles; TNT; Direct determination; ION MOBILITY SPECTROMETRY; SOLID-PHASE MICROEXTRACTION; EXPLOSIVE COMPOUNDS; NANOCRYSTALS; CDTE;

D O I：

10.1016/j.forsciint.2015.12.028

中图分类号：

DF [法律]; D9 [法律]; R [医药、卫生];

学科分类号：

0301 ; 10 ;

摘要：

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 x 10(7)-5.0 x 10(5) mol/L range, and the correlation coefficient was 0.9990. TNT detection limit was 2.1 x 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. (C) 2015 Elsevier Ireland Ltd. All rights reserved.

引用

页码：101 / 105

页数：5

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