Highly selective and ultrasensitive detection of Hg2+ based on fluorescence quenching of Au nanoclusters by Hg2+–Au+ interactions

Jianping Xie; Yuangang Zheng; Jackie Y. Ying

doi:10.1039/B920748A

You do not have JavaScript enabled. Please enable JavaScript to access the full features of the site or access our non-JavaScript page.

Highly selective and ultrasensitive detection ofHg²⁺ based on fluorescence quenching of Au nanoclusters by Hg²⁺–Au⁺ interactions†

Jianping Xie,^a Yuangang Zheng^a and Jackie Y. Ying*^a

Author affiliations

* Corresponding authors

^a Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669, Singapore
E-mail: jyying@ibn.a-star.edu.sg
Fax: (+65) 6478-9020
Tel: (+65) 6824-7100

Abstract

A simple label-free method for the detection of Hg²⁺ 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 Hg²⁺–Au⁺ interactions, which effectively quenched the fluorescence of Au NCs.

Download options Please wait...

Supplementary files

Experimental details of the synthesis of Au NCs and Au@Ag core–shell NCs; optical properties of Au NCs; optical properties of Au NCs in the presence of Hg ²⁺ and NaBH ₄; XPS spectra of Hg; transmission electron microscopy (TEM) images of Au NCs in the presence of Hg ²⁺; fluorescence image of Au NCs conjugated to polystyrene beads; photographs of paper test strips dipped in solutions containing various concentrations of Hg ²⁺ ions; characterizations of Au@Ag core–shell NCs; photographs under UV light of aqueous Au@Ag core–shell NCs solutions in the presence of various metal ions PDF (732K)

Article information

DOI: https://doi.org/10.1039/B920748A
Article type: Communication
Submitted: 07 Oct 2009
Accepted: 11 Dec 2009
First published: 24 Dec 2009

Download Citation

Chem. Commun., 2010,46, 961-963

Permissions

Request permissions

Highly selective and ultrasensitive detection of Hg²⁺ based on fluorescence quenching of Au nanoclusters by Hg²⁺–Au⁺ interactions

J. Xie, Y. Zheng and J. Y. Ying, Chem. Commun., 2010, 46, 961 DOI: 10.1039/B920748A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Social activity

Fetching data from CrossRef.
This may take some time to load.

Chemical Communications