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Royal Society of Chemistry, Journal of Materials Chemistry C Materials for optical and electronic devices, 16(3), p. 4050-4056, 2015

DOI: 10.1039/c5tc00246j

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Sub-nanometer sized Cu6(GSH)3 clusters: One-step synthesis and electrochemical detection of glucose

Journal article published in 2015 by Xiaohui Gao, Yizhong Lu, Minmim Liu, Shuijian He, Wei Chen
This paper is available in a repository.
This paper is available in a repository.

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Abstract

We report here a one-pot synthesis of sub-nanometer sized copper clusters capped with water-soluble ligand, L-glutathione (SGH) through a chemical reduction process. The composition of the as-prepared Cu6(SG)3 nanoclusters was confirmed by electrospray ionization mass spectrometry (ESI-MS) and matrix-assisted laser desorption ionzation time-of-flight mass spectroscopy (MALDI-TOF MS). The FTIR, 1H NMR and XPS characterizations showed that with the production of Cu6(SG)3 clusters and the formation of Cu-S bonds, the surface chemical environment of the clusters exhibited significant change. The produced water-soluble clusters show aggregation-induced fluorescence in ethanol. By loading on TiO2 support, the as-prepared copper nanoclusters were successfully applied to the electrochemical detection of glucose. Compared to large Cu nanoparticles, the Cu6(SG)3 nanoclusters exhibited higher sensitivity and wider linear range for glucose detection.