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]E China Univ Sci & Technol, Dept Chem, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Inst Intelligent Machines, Key Lab Biomimet Sensing & Adv Robot Technol, Hefei 230031, Anhui, Peoples R China

年份：2011

卷号：84

期号：2

起止页码：508

外文期刊名：TALANTA

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000289141500039)】；

基金：We thank the National Natural Science Foundation of China (20771037), the Fundamental Research Funds for the Central Universities, and the Program for Professor of Special Appointment at Shanghai Institutions of Higher Learning for financial support.

语种：英文

外文关键词：Gold nanoparticles; Anti-aggregation; Colorimetric probe; Mercury

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 Hg2+ 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. (C) 2011 Elsevier B.V. All rights reserved.