文献类型：期刊文献

英文题名：Highly selective and sensitive visualizable detection of Hg2+ based on anti-aggregation of gold nanoparticles

作者：Li, Yan[1]; Wu, Ping[1]; Xu, Hu[1]; Zhang, Zhongping[2]; Zhong, Xinhua[1]

机构：[1] Key Laboratory for Advanced Materials, Department of Chemistry, East China University of Science and Technology, 130 Meilong Rd, Shanghai 200237, China; [2] Key Laboratory of Biomimetic Sensing and Advanced Robot Technology, Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui 230031, China

年份：2011

卷号：84

期号：2

起止页码：508

外文期刊名：Talanta

收录：EI(收录号：20111013731402)

语种：英文

外文关键词：Color - Mercury (metal) - Probes - Colorimetry - Fiber optic sensors - Metal ions - Metal nanoparticles

摘要：For the widely used gold nanoparticles (AuNPs)-based colorimetric probes, AuNPs generally change from dispersion to aggregation state accompanying with corresponding color turning from red to blue. Although colorimetric probes based on the anti-aggregation of AuNPs show exceptional selectivity and sensitivity, few examples have been reported in literature. A facile but highly sensitive and selective colorimetric probe based on the anti-aggregation of AuNPs transferred from the deactivation of aggregation agent 4,4′-dipyridyl by Hg 2+ was developed in this work. This reported probe is suitable for real-time detection of Hg2+ in water with a detection limit of 3.0 ppb for Hg2+, and exhibits a selectivity toward Hg2+ by two orders of magnitude over other metal ions. The dynamic range of this probe can be conveniently tuned by adjusting the amount of 4,4′-dipyridyl used. ? 2011 Elsevier B.V. All rights reserved.