Sensitive detection of cadmium ions based on a quantum-dot-mediated fluorescent visualization sensor

文献类型： 外文期刊

第一作者： Ai, Qiushuang

作者： Ai, Qiushuang;Dong, Yifan;Yu, Xiren;Zhang, Dawen;Qiu, Suyan;Wei, Peiling

作者机构：

期刊名称：RSC ADVANCES （ 影响因子：3.9； 五年影响因子：3.9 ）

ISSN：

年卷期： 2023 年 13 卷 37 期

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收录情况： SCI

摘要： A sensitive ratiometric fluorescent sensor for detecting cadmium ions (Cd2+) was constructed based on carbon quantum dots (CQDs)/CdTe quantum dots (CdTe QDs). Red fluorescence (from CdTe QDs) played the role of the signal response and blue fluorescence (from CQDs) served as a reference probe without a color change. The fluorescent sensor showed high selectivity and sensitivity to Cd2+ with a limit of detection (LOD) of 0.018 & mu;M and a range from 0.1 & mu;M to 23 & mu;M. The proposed method was successfully applied to the determination of Cd2+ in real rice samples. In addition, a fluorescent sensor integrated with a smartphone platform was further designed for the visualized and quantitative detection of Cd2+. This work might extend the range of visualization analysis strategies and provide new insights into the rapid quantitative, portable and sensitive detection of Cd2+ in real-time and on-site applications. A sensitive ratiometric fluorescent sensor for detecting cadmium ions (Cd2+) was constructed based on carbon quantum dots (CQDs)/CdTe quantum dots (CdTe QDs).

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