Journal
MICROCHEMICAL JOURNAL
Volume 159, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.microc.2020.105556
Keywords
Gold nanoclusters; Fluorescence resonance energy transfer; Glutathione; Fluorescence detection; MnO2 nanosheets
Categories
Funding
- National Natural Science Foundation of China [11774048]
- 111 Project of China [B13013]
- Key Laboratory for UV-Emitting Materials and Technology of Ministry of Education [130028723]
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In this work, a gold nanocluster with lysine (Lys) as a ligand was fabricated, and a novel nanocomposite probe (AuNCs@Lys-MnO2) was prepared based on fluorescence resonance energy transfer (FRET). AuNCs@Lys-MnO2 was manufactured for sensitive and rapid sensing of glutathione (GSH) in human serum. Gold nanoclusters (AuNCs@Lys) and manganese dioxide nanosheets (MnO2 nanosheets) are combined by electrostatic interaction. MnO2 nanosheets can quickly quench the fluorescence of AuNCs@Lys through FRET. GSH has strong reducing ability, which can reduce MnO2 and degrade AuNCs@Lys-MnO2 FRET system. The presence of GSH subsequently releases AuNCs@Lys, which causes partial recovery of fluorescent signal. The nanocomposite probe is successfully applied to detect GSH in human serum. Detection range is near the normal value in human serum, and there is no need to dilute the serum during the detection process. This is a fast, simple, and cost-effective strategy. The method can detect GSH in the concentration range of 0.5 to 1000 mu M, and has a very high sensitivity, the detection limit is as low as 5 nM.
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