期刊
NANOTECHNOLOGY
卷 21, 期 2, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/21/2/025501
关键词
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资金
- Ministry of Science and Technology [2007AA03Z354]
- National Natural Science Foundation of China [20703008]
- Department of Science and Technology of Jilin Province [20082103]
- Training Fund of NENU's Scientific Innovation Project [NENU-07047, 08005, 08012]
A simple, cost-effective yet rapid and sensitive colorimetric sensor for the detection of Hg2+ using L-cysteine functionalized gold nanoparticles induced by ultraviolet radiation was developed. The sensitivity and selectivity of detection was also investigated. The L-cysteine modified gold nanoparticles can be induced to aggregate quickly in the presence of Hg2+, especially with the assistance of ultraviolet radiation. The presence of Hg2+ can be monitored by the colorimetric response of gold nanoparticles. The detection of Hg2+ could be realized, after measuring the UV-vis spectra, with a detection limit of 100 nM. The selectivity of this method has been investigated by other divalent metal ions. The effective colorimetric sensor can be used for on-site and real-time Hg2+ detection.
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