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Issue 21, 2013
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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

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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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Publication details

The article was received on 29 Jul 2013, accepted on 05 Sep 2013 and first published on 06 Sep 2013


Article type: Paper
DOI: 10.1039/C3AY41275J
Citation: 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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