Highly selective and ultrasensitive detection of Hg(2+) based on fluorescence quenching of Au nanoclusters by Hg(2+)-Au(+) interactions

Chem Commun (Camb). 2010 Feb 14;46(6):961-3. doi: 10.1039/b920748a. Epub 2009 Dec 24.

Abstract

A simple label-free method for the detection of Hg(2+) ions with high selectivity and sensitivity has been developed by using fluorescent Au NCs in aqueous media. The sensing mechanism was based on the high-affinity metallophilic Hg(2+)-Au(+) interactions, which effectively quenched the fluorescence of Au NCs.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Fluorescent Dyes / chemistry*
  • Gold / chemistry*
  • Mercury / analysis*
  • Metal Nanoparticles / chemistry*
  • Spectrometry, Fluorescence / methods*
  • Ultraviolet Rays

Substances

  • Fluorescent Dyes
  • Gold
  • Mercury