Highly sensitive gold nanoparticle-based colorimetric sensing of mercury(II) through simple ligand exchange reaction in aqueous Media

Yang Rae Kim, Rakesh Kumar Mahajan, Jong Seung Kim, Hasuck Kim

Research output: Contribution to journalArticle

103 Citations (Scopus)

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 languageEnglish
Pages (from-to)292-295
Number of pages4
JournalACS Applied Materials and Interfaces
Volume2
Issue number1
DOIs
Publication statusPublished - 2010 Jan 27

Keywords

  • Colorimetric
  • Dithioerythritol
  • Gold nanoparticles
  • Ligand exchange
  • Mercury

ASJC Scopus subject areas

  • Materials Science(all)

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