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Issue 26, 2019
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Facile synthesis of MoS2 quantum dots as fluorescent probes for sensing of hydroquinone and bioimaging

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Abstract

Recently, transition metal dichalcogenide quantum dots have attracted widespread attention among researchers as fluorescent materials. In this work, a facile bottom–up route is proposed to synthesize water-soluble molybdenum disulfide quantum dots (MoS2 QDs) by using sodium molybdate and cysteine as precursors. The as-prepared spherical MoS2 QDs with an average size of 3.5 nm exhibit intense PL emission, whose quantum yield (QY) is 6.5% (cal.). In particular, the as-synthesized MoS2 QDs show highly sensitive and selective detection of H2Q. The lowest limit of detection can reach 0.3 μM in water, far lower than the estimated wastewater discharge limit of the United States Environmental Protection Agency (EPA) (0.5 mg L−1). What is more, the as-prepared MoS2 QDs exhibited applicability in cell imaging with lower cytotoxicity. Therefore, the as-prepared MoS2 QDs show potential applications in environmental monitoring, bioanalysis, disease diagnosis and treatment, etc.

Graphical abstract: Facile synthesis of MoS2 quantum dots as fluorescent probes for sensing of hydroquinone and bioimaging

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Supplementary files

Article information


Submitted
12 May 2019
Accepted
10 Jun 2019
First published
10 Jun 2019

Anal. Methods, 2019,11, 3307-3313
Article type
Paper

Facile synthesis of MoS2 quantum dots as fluorescent probes for sensing of hydroquinone and bioimaging

L. Li, Z. Guo, S. Wang, D. Li, X. Hou, F. Wang, Y. Yang and X. Yang, Anal. Methods, 2019, 11, 3307
DOI: 10.1039/C9AY00988D

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