Highly selective fluorescent sensors for Hg2+ based on bovine serum albumin-capped gold nanoclusters

被引：188

作者：

Hu, Dehong ^{[1
]}

Sheng, Zonghai ^{[2
]}

Gong, Ping ^{[1
]}

Zhang, Pengfei ^{[1
]}

Cai, Lintao ^{[1
]}

机构：

[1] Chinese Acad Sci, Shenzhen Inst Adv Technol, Inst Biomed & Hlth Engn, Key Lab Biomed Informat & Hlth Engn, Shenzhen 518055, Peoples R China

[2] Huazhong Agr Univ, State Key Lab Agr Microbiol, Coll Sci, Wuhan 430070, Peoples R China

来源：

ANALYST | 2010年 / 135卷 / 06期

基金：

中国国家自然科学基金;

关键词：

MERCURIC ION; MERCURY(II); NANOPARTICLES; EMISSION; CLUSTERS; SIZE;

D O I：

10.1039/c000589d

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

In this paper, we report a new homogeneous assay for rapid, highly selective and sensitive detection of Hg2+ in aqueous solution based on the induced photoluminescence (PL) quenching of BSA-modified gold nanoclusters (BSA-Au NCs). There was a linear correlation between the expression (I-0 - I)/I-0 and the concentrations of Hg2+ over the ranges of 0.4-43.2 mu M, and the corresponding limit of detection (LOD) was 80 nM. The relative standard deviation of 5 replicate measurements was 1.4% for 1.0 x 10(-5) mol L-1 Hg2+. Moreover, this method has excellent selectivity over metal ions and anions. The feasibility of the BSA-Au NCs sensor for Hg2+ in different aqueous samples was demonstrated with satisfactory results. Moreover, the possible sensing Hg2+ mechanism was also discussed.

引用

页码：1411 / 1416

页数：6

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