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Low Potential Stable Glucose Detection at Carbon Nanotube Modified Gold Electrodes

Published online by Cambridge University Press:  01 February 2011

S. G. Wang,
Qing Zhang,
Ruili Wang,
D. J. Yang,
S. F. Yoon and
R. Zhang
S. G. Wang
Affiliation:
Microelectronics Centre, School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798.
Qing Zhang
Affiliation:
Microelectronics Centre, School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798.
Ruili Wang
Affiliation:
Department of Community Occupational & Family Medicine, Faculty of Medicine, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260.
D. J. Yang
Affiliation:
Microelectronics Centre, School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798.
S. F. Yoon
Affiliation:
Microelectronics Centre, School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798.
R. Zhang
Affiliation:
Microelectronics Centre, School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798.
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Abstract

The subtle electronic properties and large electroactive surface of carbon nanotubes (CNTs) suggest that they have the ability to promote electron-transfer and favor electrocatalytic behavior in electrochemical reactions when they are employed as an electrode. In this paper, CNT-modified gold electrodes for glucose biosensor have been fabricated using multi-walled carbon nanotubes. The CNT-based electrode exhibits a strong and stable amperometric response toward glucose even at a low potential of +0.35 V versus Ag/AgCl in comparison with the glassy carbon-based electrode.

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References

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