A simple and sensitive colorimetric method for detection of mercury ions based on anti- aggregation of gold nanoparticles

被引：84

作者：

Lou, Tingting ^{[1
,4
]}

Chen, Ling ^{[1
,4
]}

Zhang, Chunrong ^{[2
]}

Kang, Qi ^{[2
]}

You, Huiyan ^{[3
]}

Shen, Dazhong ^{[2
]}

Chen, Lingxin ^{[1
]}

机构：

[1] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc, Yantai 264003, Peoples R China

[2] Shandong Normal Univ, Coll Chem Chem Engn & Mat Sci, Minist Educ China, Key Lab Mol & Nanomat Probes, Jinan 250014, Peoples R China

[3] Dalian Univ, Environm & Chem Engn Coll, Dalian 116622, Peoples R China

[4] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

来源：

ANALYTICAL METHODS | 2012年 / 4卷 / 02期

基金：

中国国家自然科学基金;

关键词：

OPTICAL-DETECTION; AQUEOUS-MEDIA; HG-II; DNA; SENSOR; OLIGONUCLEOTIDES; CHEMOSENSOR; SELECTIVITY; DESIGN; DUPLEX;

D O I：

10.1039/c2ay05764f

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A simple and sensitive method for the colorimetric detection of mercury ions (Hg2+) has been proposed by using anti-aggregation of gold nanoparticles (AuNPs) based on the co-ordination between thymine and mercury ions. The thymine can bind to the AuNPs through Au-N bonds and induce aggregation of AuNPs. In the presence of Hg2+, the thymine was released from the surface of AuNPs via the formation of a thymine-Hg2+ coordination complex, leading to the dispersion of AuNPs. The detection reagent can be simply prepared by mixing thymine with citrate-capped AuNPs. This method is not only costeffective, but also avoids complicated surface modifications and tedious separation processes.

引用

页码：488 / 491

页数：4

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