Journal
ELECTROCHIMICA ACTA
Volume 55, Issue 19, Pages 5420-5427Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2010.04.091
Keywords
Prussian blue; Carbon nanotubes; Hollow PtCo nanochains; Nafion; Glucose
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Funding
- National Natural Science Foundation of China [20675064]
- Ministry of Education of China [708073]
- Natural Science Foundation of Chongqing City, China [CSTC-2009BA1003]
- High Technology Project Foundation of Southwest University (XSGX), China [02]
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In this paper, a novel glucose biosensor was developed based on immobilizing glucose oxidase (GOD) on Prussian blue-multiwall carbon nanotubes (PB@MWNTs) composite and hollow PtCo (H-PtCo) nanochains modified electrode. The PB@MWNTs/H-PtCo membrane showed good biocompatibility, large surface-to-volume ratio and excellent electron-conductive ability. The successful fabrication of the PB@MWNTs composite synthesized with MWNTs as a template and Fe(III)-reducer were characterized by UV-vis absorption spectroscopy, Fourier transform infrared (FTIR) spectrometry and transmission electron microscopy (TEM). The hollow PtCo nanochains were also characterized by TEM and X-ray photoelectron spectroscopy (XPS). The response of the biosensor towards glucose under the optimized conditions, as investigated by chronoamperometry, is linear from 3.0 mu M to 3.6 mM, with a low detection limit of 0.85 mu M (S/N = 3) and a high sensitivity 21 mA M-1 cm(-2). Moreover, the biosensor exhibits strong anti-interferent ability, good reproducibility and excellent stability. (C) 2010 Elsevier Ltd. All rights reserved.
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