Water soluble sulphur quantum dots for selective Ag+ sensing based on the ion aggregation-induced photoluminescence enhancement

Dejian Chen; Shunxing Li; Fengying Zheng

doi:10.1039/C5AY02451J

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Water soluble sulphur quantum dots for selective Ag⁺ sensing based on the ion aggregation-induced photoluminescence enhancement†

Dejian Chen,^a Shunxing Li*^ab and Fengying Zheng^ab

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* Corresponding authors

^a Department of Chemistry and Environment, Minnan Normal University, Zhangzhou, Fujian, P. R. China

^b Fujian Province Key Laboratory of Modern Analytical Science and Separation Technology Minnan Normal University, Zhangzhou, Fujian, P. R. China
E-mail: lishunxing@mnnu.edu.cn, shunxing_li@aliyun.com

Abstract

Quantum dots are promising fluorescent probes for metal ion detection, biosensing and bioimaging and so on. In this study, water-soluble sulphur quantum dots (SQDs) were used as a highly sensitive and selective sensor for fluorescence detection of silver(I) ions (Ag⁺) with a low detection limit (0.81 μM) and a wide linear range (0.8–280.8 μM). A nanoparticle aggregation-induced emission enhancement for SQDs coexisting with Ag⁺ was displayed for the first time. The practical use of this system for the determination of Ag⁺ in well water and tap water samples was also demonstrated successfully.

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Article information

DOI: https://doi.org/10.1039/C5AY02451J
Article type: Paper
Submitted: 15 Sep 2015
Accepted: 05 Dec 2015
First published: 07 Dec 2015

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Anal. Methods, 2016,8, 632-636

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Water soluble sulphur quantum dots for selective Ag⁺ sensing based on the ion aggregation-induced photoluminescence enhancement

D. Chen, S. Li and F. Zheng, Anal. Methods, 2016, 8, 632 DOI: 10.1039/C5AY02451J

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Analytical Methods