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Fluorescent Silver Nanoclusters as Effective Probes for Highly Selective Detection of Mercury(II) at Parts-per-Billion Levels

Authors

  • Dr. Chuanxi Wang,

    1. State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012 (P. R. China)
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  • Lin Xu,

    1. State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012 (P. R. China)
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  • Yu Wang,

    1. State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012 (P. R. China)
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  • Dan Zhang,

    1. State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012 (P. R. China)
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  • Prof. Xiaodong Shi,

    Corresponding author
    1. C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, WV 26506 (USA)
    • Xiaodong Shi, C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, WV 26506 (USA)

      Quan Lin, State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012 (P. R. China)

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  • Fengxia Dong,

    1. State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012 (P. R. China)
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  • Prof. Kui Yu,

    1. Steacie Institute for Molecular Sciences, NRC Canada, Ottawa, Ontario, K1 A0R6 (Canada)
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  • Prof. Quan Lin,

    Corresponding author
    1. State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012 (P. R. China)
    • Xiaodong Shi, C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, WV 26506 (USA)

      Quan Lin, State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012 (P. R. China)

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  • Prof. Bai Yang

    1. State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012 (P. R. China)
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Abstract

Facile preparation of water-soluble and fluorescent Ag nanoclusters (NCs) stabilized by glutathione at room temperature is described. Although the glutathione layer was introduced to prevent the silver nanoparticles from decomposition and increase their water solubility, this simple surface optimization resulted in surprisingly high efficiency of selective Hg2+ sensing, where the limit of detection (LOD) was as low as 10−10M (0.02 ppb, 0.1 nM). This result revealed a simple and practical strategy for Hg2+ detection using fluorescent Ag NCs as sensor probe, with the lowest detecting limits reported to date.

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