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-Hg 2+-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 Pb 2+,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.
Original language | English |
---|---|
Pages (from-to) | 292-295 |
Number of pages | 4 |
Journal | ACS Applied Materials and Interfaces |
Volume | 2 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2010 Jan 27 |
Keywords
- Colorimetric
- Dithioerythritol
- Gold nanoparticles
- Ligand exchange
- Mercury
ASJC Scopus subject areas
- Materials Science(all)