Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 2, Issue 1, Pages 292-295Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am9006963
Keywords
colorimetric; dithioerythritol; gold nanoparticles; ligand exchange; mercury
Funding
- Korea Research Foundation [KRF-2008-313-C00563]
- Korea Science and Engineering Foundation (KOSEF), Korea government (MEST) [R11-2005-008-06002-0]
- Brain Korea 21 fellowship
- Korean Federation of Science and Technology Societies (KOFST) [082S-1-3-0195]
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A strategy for the rational design of a novel colorimetric sensor based on dithioerythritol-modified gold nanoparticles for the selective recognition of Hg2+ in aqueous media is presented. This approach relies on the combination of gold nanoparticles with Hg2+ through sulfur-Hg2+-sulfur interaction. The gold nanoparticles showed high selectivity toward Hg2+ with binding-induced red shift in the absorption spectra, with no response to major interfering cations such as Pb2+, Cd2+, and Cu2+ in the presence of ethylenediamine tetraacetic acid. The system responds to Hg2+ with a detection limit of 100 nM and might open a new avenue for the development of Hg2+ sensing probes.
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