Issue 115, 2015
From the journal:

RSC Advances

Gold nanoparticle-based fluorescent “turn-on” sensing system for the selective detection of mercury ions in aqueous solution†

Sohee Choia  and  Youngmi Kim*a  

* Corresponding authors

a Department of Chemistry, Institute of Nanosensor and Biotechnology, Dankook University, 152 Jukjeon-ro, Suji-gu, Yongin-si, Gyeonggi-do, Korea
E-mail: youngmi@dankook.ac.kr
Fax: +82-31-8021-7199
Tel: +82-31-8005-3156

Abstract

In this study, a simple and straightforward fluorometric assay using dye-adsorbed gold nanoparticles (AuNPs) was used in the highly selective and sensitive detection of mercury ions in aqueous buffer solution. Through the strong affinity of Hg atoms for Au, Hg atoms in situ generated by the reduction of Hg(II) ions in the presence of citrate ions on the surface of AuNPs displaced cationic BODIPY dye (1-PPh3+) from the fluorescence-quenched AuNP/1-PPh3+ adsorbate, leading to a significant increase in fluorescence intensity. The AuNP/1-PPh3+ adsorbate-based sensing system provided a rapid response upon the addition of Hg(II) ions, with highly fluorescent turn-on signals and excellent selectivity.

Graphical abstract: Gold nanoparticle-based fluorescent “turn-on” sensing system for the selective detection of mercury ions in aqueous solution

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Article information

DOI
https://doi.org/10.1039/C5RA20152G
Article type
Communication
Submitted
29 Sep 2015
Accepted
29 Oct 2015
First published
29 Oct 2015

RSC Adv., 2015,5, 95268-95272

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Gold nanoparticle-based fluorescent “turn-on” sensing system for the selective detection of mercury ions in aqueous solution

S. Choi and Y. Kim, RSC Adv., 2015, 5, 95268 DOI: 10.1039/C5RA20152G

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