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

doi:10.1021/am9006963

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 journal › Article › peer-review

105 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 language	English
Pages (from-to)	292-295
Number of pages	4
Journal	ACS Applied Materials and Interfaces
Volume	2
Issue number	1
DOIs	https://doi.org/10.1021/am9006963
Publication status	Published - 2010 Jan 27

Keywords

Colorimetric
Dithioerythritol
Gold nanoparticles
Ligand exchange
Mercury

ASJC Scopus subject areas

Materials Science(all)

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10.1021/am9006963

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AU - Mahajan, Rakesh Kumar

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AU - Kim, Hasuck

PY - 2010/1/27

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AB - 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.

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KW - Ligand exchange

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

Abstract

Keywords

ASJC Scopus subject areas

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