Issue 21, 2013
From the journal:

Analytical Methods

Amine-capped carbon dots as a nanosensor for sensitive and selective detection of picric acid in aqueous solution via electrostatic interaction

Qingyuan Niu,a   Kezheng Gao,a   Zhihui Linb  and  Wenhui Wu*a  

* Corresponding authors

a School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China
E-mail: wuwh@bit.edu.cn
Tel: +86-010-68912659

b China Research and Development Academy of Machinery Equipment, Beijing 100089, P. R. China

Abstract

In this study, a simple and low toxicity method based on water-soluble amine-capped carbon dots as a nanosensor for sensitive and selective detection of picric acid (PA) in water was developed. We found that PA could remarkably quench the fluorescence signal of the amine-capped carbon dots in water, while other nitroaromatic explosives and common reagents only caused little fluorescence quenching. The detection limit of the amine-capped carbon dots towards PA in aqueous solution was about 1 μM. The results indicate that the strong electrostatic interaction from an anion–cation pair between PA and the carbon dot surface could enhance the fluorescence selective response towards PA in aqueous solution.

Graphical abstract: Amine-capped carbon dots as a nanosensor for sensitive and selective detection of picric acid in aqueous solution via electrostatic interaction

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Article information

DOI
https://doi.org/10.1039/C3AY41275J
Article type
Paper
Submitted
29 Jul 2013
Accepted
05 Sep 2013
First published
06 Sep 2013

Anal. Methods, 2013,5, 6228-6233

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Amine-capped carbon dots as a nanosensor for sensitive and selective detection of picric acid in aqueous solution via electrostatic interaction

Q. Niu, K. Gao, Z. Lin and W. Wu, Anal. Methods, 2013, 5, 6228 DOI: 10.1039/C3AY41275J

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