Sensitive Hg2+ Ion Detection Using Metal Enhanced Fluorescence of Novel Polyvinyl Pyrrolidone (PVP)-Templated Gold Nanoparticles

Author:

Dong Kailong1,Zhou Jiasheng1,Yang Taiqun1,Dai Shan1,Tan Hao1,Chen Yuting1,Pan Haifeng1,Chen Jinquan2,Audit Benjamin2,Zhang Sanjun134ORCID,Xu Jianhua13

Affiliation:

1. State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, China

2. University of Lyon, Laboratoire de Physique, Lyon, France

3. Collaborative Innovation Center of Extreme Optics, Shanxi University, Shanxi, China

4. NYU-ECNU Institute of Physics at NYU Shanghai, Shanghai, China

Abstract

In this study, we report a straightforward strategy for Hg2+ ion detection. Fluorescent Au nanoparticles (NPs) were one-pot synthesized using a polymer (polyvinyl pyrrolidone [PVP]) as both capping and fluorescence agent. The as-synthesized PVP-Au NPs showed a remarkably rapid response selectively for Hg2+ ions compared to 14 other metal ions. The detection limit of Hg2+ was estimated at 100 nM. We discuss the emission and quenching mechanism of the PVP-Au NPs, the former being attributed to metal enhanced fluorescence and the latter being related to static quenching by Hg2+. The fluorescence of PVP-Au NPs offers an efficient and reliable strategy for Hg2+ ions detection. They therefore have a great potential for applications in health and environmental monitoring.

Publisher

SAGE Publications

Subject

Spectroscopy,Instrumentation

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