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A Mn:ZnSe quantum dot-based turn-on fluorescent sensor for the highly selective and sensitive detection of Cd2+

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Abstract

A highly selective and sensitive nanoprobe with fluorescence turn-on sensing properties for recognizing Cd2+ was developed through replacing Mn2+ near the surface of Mn:ZnSe quantum dots (QDs). The similar ionic radii of Cd2+ and Zn2+ make the replacement of superficial Zn2+ by Cd2+ possible, followed by the replacement of external Mn2+ by Cd2+. Thus, this fluorescence turn-on strategy possesses great selectivity for the determination of Cd2+. Based on this strategy, the limit of detection (LOD) for Cd2+ is 18 nM, which is superior to the LOD of most reported fluorescent nanomaterial-based probes.

Graphical abstract: A Mn:ZnSe quantum dot-based turn-on fluorescent sensor for the highly selective and sensitive detection of Cd2+

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Article information


Submitted
13 Nov 2019
Accepted
23 Dec 2019
First published
23 Dec 2019

Anal. Methods, 2020, Advance Article
Article type
Paper

A Mn:ZnSe quantum dot-based turn-on fluorescent sensor for the highly selective and sensitive detection of Cd2+

Z. Zhou, L. Yang, Y. Liao, H. Wu, X. Zhou, S. Huang, Y. Liu and Q. Xiao, Anal. Methods, 2020, Advance Article , DOI: 10.1039/C9AY02445J

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