Spectrophotometric determination of mercury(II) ion using gold nanorod as probe

被引：51
|
作者：
Bi, Ning [1 ]
Chen, Yanhua [1 ]
Qi, Haibo [1 ]
Zheng, Xia [1 ]
Chen, Yang [1 ]
Liao, Xue [1 ]
Zhang, Hanqi [1 ]
Tian, Yuan [1 ]
机构：
[1] Jilin Univ, Coll Chem, Changchun 130012, Peoples R China
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2012年 / 166卷
基金：
中国国家自然科学基金;
关键词：
Localized surface plasmon resonance (LSPR); Spectrophotometric; Mercury(II) ion (Hg2+); Gold nanorod (AuNR); SELECTIVE DETECTION; SPECIATION; HG2+; DNA; PRECONCENTRATION; NANOPARTICLES; CHEMOSENSOR; MECHANISM;
D O I：
10.1016/j.snb.2012.03.068
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A simple method for sensing mercury in aqueous solutions based on localized surface plasmon resonance was developed. Gold nanorods are aggregated in the presence of dithiothreitol. However, the strong coordination of Hg2+ with dithiothreitol results in a stable Hg-S covalent bond and inhibits the aggregation of the gold nanorods. The potential factors affecting the performance of the detection of Hg2+ were carefully optimized. Under the optimal conditions, the differences of ratios of absorbances at two wavelengths are directly proportional to the Hg2+ concentrations in the range of 1-50 nmol/L. The limit of detection is 0.42 nmol/L. The developed method shows a good selectivity for Hg2+ and can be applied to the determination of Hg2+ in water samples. Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved.
引用
收藏
页码：766 / 771
页数：6
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