Journal
ANALYTICA CHIMICA ACTA
Volume 847, Issue -, Pages 49-54Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2014.07.019
Keywords
Cu nanoclusters; L-cysteine; One-step synthesis; Applications
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Funding
- National Natural Science Foundation of China [31100981]
- Research Fund for the Doctoral Program of Higher Education of China [20110182120014]
- Natural Science Foundation Project of CQ CSTC [cstc2013jcyjA10117]
- Fundamental Research Funds for the Central Universities [XDJK2013B038]
- Program for Innovative Research Team in University of Chongqing
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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 x 10(-7) mol L-1 x 10(-3) mol L-1, with a detection limit of 2.4 x 10(-8) mol L-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. (C) 2014 Elsevier B.V. All rights reserved.
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