A Highly Sensitive and Selective Fluorescent Probe Using MPA-InP/ZnS QDs for Detection of Trace Amounts of Cu2+ in Water

文献类型： 外文期刊

第一作者： Xu, Zeyu

作者： Xu, Zeyu;Wang, Yizhong;Xu, Zeyu;Zhang, Jiaran;Shi, Ce;Yang, Xinting;Xu, Zeyu;Zhang, Jiaran;Shi, Ce;Yang, Xinting;Xu, Zeyu;Zhang, Jiaran;Shi, Ce;Yang, Xinting

作者机构：

关键词： fluorescence; quantum dots; copper (II) ions; water

期刊名称：FOODS （ 影响因子：4.35； 五年影响因子：4.957 ）

ISSN：

年卷期： 2021 年 10 卷 11 期

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收录情况： SCI

摘要： Detection of copper (II) ions (Cu2+) in water is important for preventing them from entering the human body to preserve human health. Here, a highly sensitive and selective fluorescence probe that uses mercaptopropionic acid (MPA)-capped InP/ZnS quantum dots (MPA-InP/ZnS QDs) was proposed for the detection of trace amounts of Cu2+ in water. The fluorescence of MPA-InP/ZnS QDs can be quenched significantly in the presence of Cu2+, and the fluorescence intensity shows excellent linearity when the concentration of Cu2+ varies from 0-1000 nM; this probe also exhibits an extremely low limit of detection of 0.22 nM. Furthermore, a possible fluorescence-quenching mechanism was proposed. The MPA-InP/ZnS QDs probes were further applied to the detection of trace Cu2+ in real water samples and drink samples, showing good feasibility.

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