期刊
ANALYST
卷 137, 期 16, 页码 3697-3703出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2an35658a
关键词
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资金
- '973' Program [2011CB933502]
- International S&T Cooperation Projects of China [2010DFA42060]
- National Natural Science Foundation of China [21075061, 21105050]
A novel glutathione (GSH) photoelectrochemical biosensor was fabricated using the newly synthesized graphene-CdS (GR-CdS) nanocomposites. The GR-CdS nanocomposites were prepared by a fast, one-step, aqueous reaction. The as-prepared GR-CdS structure inherited the excellent electron transport of GR and facilitated the spatial separation of photo-generated charge carrier, therefore resulting in the enhanced photocurrent, and making it a promising candidate for developing photoelectrochemical biosensors. The proposed GSH sensor displays satisfactory analytical performance with an acceptable linear range from 0.01 to 1.5 mmol L-1 with a detection limit of 0.003 mmol L-1 at a signal-to-noise ratio of 3, and also shows an excellent specificity against anticancer drugs and can be successfully applied for GSH detection in real samples. The as-synthesized GR-CdS nanocomposites exhibited obviously enhanced photovoltaic properties, which could be extended to the detection of other enzymes and biomolecules, thus providing a promising platform for the development of photoelectrochemical biosensors.
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