1. A novel glucose colorimetric sensor based on intrinsic peroxidase-like activity of C60-carboxyfullerenes.
- Author
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Li, Ruimin, Zhen, Mingming, Guan, Mirong, Chen, Daiqin, Zhang, Guoqiang, Ge, Jiechao, Gong, Ping, Wang, Chunru, and Shu, Chunying
- Subjects
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COLORIMETRIC analysis , *FULLERENES , *BIOCHEMICAL substrates , *BENZIDINE , *HORSERADISH peroxidase , *CARBON isotopes - Abstract
Abstract: C60-carboxyfullerene, C60[C(COOH)2]2, has been proven to function as peroxidase mimetics that can catalyze the reaction of peroxidase substrate 3,3',5,5'-tetramethylbenzidine (TMB) in the presence of H2O2 to produce a blue color reaction. Kinetic studies further indicate that C60[C(COOH)2]2 has an even higher affinity to TMB than that of the natural enzyme, horseradish peroxidase (HRP). C60[C(COOH)2]2/glucose oxidase (GO x )/TMB system provides a novel colorimetric sensor for glucose and shows good response toward glucose detection over a range of 1.0–40μM with a limit of detection 0.5μM (3σ/slope). Moreover, this sensitive and selective sensor can be successfully applied for the quantitative determination of glucose in human serum. The results indicate that it is a simple, cheap, convenient, highly selective, sensitive, and easy handling colorimetric assay. [Copyright &y& Elsevier]
- Published
- 2013
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