Trypsin-Stabilized Fluorescent Gold Nanocluster for Sensitive and Selective Hg2+ Detection

被引：130

作者：

Kawasaki, Hideya ^{[1
]}

Yoshimura, Kouta ^{[1
]}

Hamaguchi, Kenji ^{[1
]}

Arakawa, Ryuichi ^{[1
]}

机构：

[1] Kansai Univ, Dept Chem & Mat Engn, Fac Chem Mat & Bioengn, Osaka 5648680, Japan

来源：

ANALYTICAL SCIENCES | 2011年 / 27卷 / 06期

基金：

日本学术振兴会;

关键词：

METAL NANOPARTICLES; CRYSTAL-STRUCTURE; AU NANOCLUSTERS; QUANTUM DOTS; CLUSTERS; NANOCRYSTALS; SPECTROSCOPY; TEMPERATURE; SPECTRA; SIZE;

D O I：

10.2116/analsci.27.591

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

We report on trypsin-stabilized fluorescent gold nanoclusters (Au NCs) for the sensitive and selective detection of Hg2+ ions. The Au NCs have an average size of 1 nm and show a red emission at 645 nm. The photostable properties of the trypsin-stabilized Au NCs were examined, and their photochemical stability was found to be similar to that of CdSe quantum dots. The fluorescence was particularly quenched by Hg2+, and therefore the Au NCs can be used as fluorescent sensors for sensitive and selective Hg2+ detection to a detection limit of 50 +/- 10 nM and the quantitative detection of Hg2+ in wide and low concentration range of 50 - 600 nM.

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收藏

页码：591 / 596

页数：6

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