Issue 6, 2010

Highly selective fluorescent sensors for Hg2+ based on bovine serum albumin-capped gold nanoclusters

Abstract

In this paper, we report a new homogeneous assay for rapid, highly selective and sensitive detection of Hg2+ in aqueous solution based on the induced photoluminescence (PL) quenching of BSA-modified gold nanoclusters (BSA-Au NCs). There was a linear correlation between the expression (I0 − I)/I0 and the concentrations of Hg2+ over the ranges of 0.4–43.2 μM, and the corresponding limit of detection (LOD) was 80 nM. The relative standard deviation of 5 replicate measurements was 1.4% for 1.0 × 10−5 mol L−1 Hg2+. Moreover, this method has excellent selectivity over metal ions and anions. The feasibility of the BSA-Au NCs sensor for Hg2+ in different aqueous samples was demonstrated with satisfactory results. Moreover, the possible sensing Hg2+ mechanism was also discussed.

Graphical abstract: Highly selective fluorescent sensors for Hg2+ based on bovine serum albumin-capped gold nanoclusters

Article information

Article type
Paper
Submitted
11 Jan 2010
Accepted
15 Mar 2010
First published
26 Apr 2010

Analyst, 2010,135, 1411-1416

Highly selective fluorescent sensors for Hg2+ based on bovine serum albumin-capped gold nanoclusters

D. Hu, Z. Sheng, P. Gong, P. Zhang and L. Cai, Analyst, 2010, 135, 1411 DOI: 10.1039/C000589D

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