A facile and highly sensitive probe for Hg(II) based on metal-induced aggregation of ZnSe/ZnS quantum dots

被引：59

作者：

Ke, Jun ^{[1
,2
]}

Li, Xinyong ^{[1
,2
]}

Shi, Yong ^{[1
]}

Zhao, Qidong ^{[1
]}

Jiang, Xuchuan ^{[2
]}

机构：

[1] Dalian Univ Technol, Sch Environm Sci & Technol, Key Lab Ind Ecol & Environm Engn MOE, State Key Lab Fine Chem, Dalian 116024, Peoples R China

[2] Univ New S Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia

来源：

NANOSCALE | 2012年 / 4卷 / 16期

基金：

国家高技术研究发展计划(863计划);

关键词：

WATER-BASED ROUTE; DOPED ZNSE; CDSE/ZNS; FLUORESCENCE; HG2+; ION; NANOPARTICLES; CYTOTOXICITY; LEAD(II); PB2+;

D O I：

10.1039/c2nr31238g

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Sensitive and selective detection strategies for toxic heavy metal ions, which are rapid, cheap and applicable to environmental and biological fields, are of significant importance. As a result of specific interaction between thiol(s) used as ligands and heavy metal ions, the photoluminescence intensity of quantum dots (QDs) in PBS buffer solution was quenched and the aggregation of QDs was formed at the same time. Herein, we present water-soluble, low toxic QDs, ZnSe/ZnS, which were applied for ultrasensitive Hg2+ ion detection with a low detection limit (2.5 nM). In addition, a model has been proposed to explain the aggregation of QDs in the presence of heavy metal ions such as Hg2+ ions.

引用

页码：4996 / 5001

页数：6

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