Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 199, Issue -, Pages 101-107Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2014.03.089
Keywords
Fullerene; Tetraoctylammonium bromide; Composites; Glucose oxidase; Electrochemiluminescence
Funding
- National Natural Science Foundation of China [21275119, 21075100]
- Ministry of Education of the People's Republic of China [708073]
- Natural Science Foundation of Chongqing City [CSTC-2011BA7003, CSTC-2009BA1003]
- Fundamental Research Funds for the Central Universities (Southwest University) [XDJK2009C082]
- High Technology Project Foundation of Southwest University [XSGX02]
- Postgraduate Science and Technology Innovation Fund of Southwest University, China [ky2009003]
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A highly sensitive electrochemiluminescence (ECL) biosensor for glucose detection has been developed through immobilizing glucose oxidase (GOD) on a glassy carbon electrode (GCE) modified with C-60 embedded in tetraoctylammonium bromide (TOAB(+)) film. C-60 is a promising electron transfer mediator between GOD and GCE surface. Meanwhile, C-60 has excellent catalytic performance to directly enhance the ECL intensity of luminol. In addition, the introduction of C-60 and TOAB(+). can immobilize more enzymes effectively onto the electrode so that they can enhance the sensitivity and detection limit of ECL biosensor. Under the optimum condition, the developed glucose biosensor exhibited the linear response range from 500 nM to 13 mM with a detection limit of 166.7 nM (at the signal-to-noise ratio of 3). The biosensor offers an alternative analytical method with excellent properties of high selectivity, long-term stability and outstanding reproducibility. (C) 2014 Elsevier B.V. All rights reserved.
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