One-step synthesis and applications of fluorescent Cu nanoclusters stabilized by l-cysteine in aqueous solution
2014
Yang, Xiaoming | Feng, Yuanjiao | Zhu, Shanshan | Luo, Yawen | Zhuo, Yan | Dou, Yao
Herein, an innovative and simple strategy for synthesizing high fluorescent Cu nanoclusters was successfully established while l-cysteine played a role as the stabilizer. Meaningfully, the current Cu nanoclusters together with a quantum yield of 14.3% were prepared in aqueous solution, indicating their extensive applications. Subsequently, the possible fluorescence mechanism was elucidated by fluorescence, UV–vis, HR-TEM, FTIR, XPS, and MS. Additionally, the CuNCs were employed for assaying Hg2+ on the basis of the interactions between Hg2+ and l-cysteine; thus facilitating the quenching of their fluorescence. The proposed analytical strategy permitted detections of Hg2+ in a linear range of 1.0×10−7molL−1×10−3molL−1, with a detection limit of 2.4×10−8molL−1 at a signal-to-noise ratio of 3. Significantly, this CuNCs described here were further applied for coding and fluorescent staining, suggesting may broaden avenues toward diverse applications.
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