Abstract
Protein protected gold nanoclusters have outstanding physical and chemical properties that make them excellent scaffolds for the construction of novel chemical and biological probes. In this study, a simple one-pot synthesis method was proposed for the preparation of fluorescent probes based on ovalbumin-stabilized gold nanoclusters. This strategy allowed the generation of water-soluble gold nanoclusters within 5 min. The as-prepared fluorescent probe exhibited a red fluorescence emission at 625 nm, and good thermostability. The fluorescent probe was applied to measure glucose concentrations based on the hydrogen peroxide-induced fluorescence quenching principle, and showed favorable biocompatibility, high sensitivity and good selectivity. As a result of the advantageous properties and performance of this fluorescent probe, the present assay allowed for the selective determination of glucose in the range of 5.0×10−6 to 10.0×10−3 mol/L with a detection limit of 1.0×10−6 mol/L. Moreover, the glucose content in urinary samples was analyzed using the constructed fluorescent probe: this indicated the potential of the fluorescent gold nanoclusters for applications in biological and clinical diagnosis and therapy.
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Wang, LL., Qiao, J., Qi, L. et al. Construction of OVA-stabilized fluorescent gold nanoclusters for sensing glucose. Sci. China Chem. 58, 1508–1514 (2015). https://doi.org/10.1007/s11426-015-5354-5
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DOI: https://doi.org/10.1007/s11426-015-5354-5