Visualization and quantification of Hg2+ based on anti-aggregation of label-free gold nanoparticles in the presence of 2-mercaptobenzothiazole

被引：22

作者：

Jin, Weiwei ^{[1
]}

Huang, Pengcheng ^{[1
]}

Wei, Guochang ^{[1
]}

Cao, Yujuan ^{[1
]}

Wu, Fangying ^{[1
]}

机构：

[1] Nanchang Univ, Coll Chem, Nanchang 330031, Peoples R China

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2016年 / 233卷

关键词：

Anti-aggregation; Gold nanoparticles; Hg2+; 2-Mercaptobenzothiazole; COLORIMETRIC DETECTION; MERCURY(II) IONS; SILVER NANOPARTICLES; SENSITIVE DETECTION; SENSING STRATEGY; DETECTION SYSTEM; MERCURIC IONS; SPECTROMETRY; SENSOR; ENVIRONMENTS;

D O I：

10.1016/j.snb.2016.04.071

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A highly sensitive and simple colorimetric strategy for Hg2+ detection is introduced based on antiaggregation of gold nanoparticles (AuNPs). 2-Mercaptobenzothiazole (MBT)can cause the aggregation of AuNPs due to strong covalent Au-S bond formation resulting in color change from red to blue. However, the presence of Hg2+ led the AuNPs to remain in the dispersed state because MBT prefers to interact with Hg2+ rather than AuNPs. Based on the anti-aggregation mechanism, Hg2+ can be detected by observing the color change of AuNPs solution containing MBT. The minimum detectable quantity is 0.1 mu M by the naked eyes, and the limit of the detection (LOD) is 6.0 nM by UV-vis spectroscopy with the linear range from 0.05 to 1.0 mu M. Furthermore, the developed detection system is also environmental-friendly and inexpensive, which has been successfully used in lake water and milk powder samples detection. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：223 / 229

页数：7

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