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
收藏
页码：101 / 105
页数：5
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