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Highly Sensitive Gold Nanoparticle-Based Colorimetric Sensing of Mercury(II) through Simple Ligand Exchange Reaction in Aqueous Media
- Issue Date
- Jan-2010
- Publisher
- AMER CHEMICAL SOC
- Keywords
- colorimetric; dithioerythritol; gold nanoparticles; ligand exchange; mercury
- Citation
- ACS APPLIED MATERIALS & INTERFACES, v.2, no.1, pp.292 - 295
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS APPLIED MATERIALS & INTERFACES
- Volume
- 2
- Number
- 1
- Start Page
- 292
- End Page
- 295
- ISSN
- 1944-8244
- Abstract
- 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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Related Researcher
- Kim, Jong Seung
- College of Science (Department of Chemistry)