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Effect of nanomaterials in platinum-decorated carbon nanotube paste-based electrodes for amperometric glucose detection

Published online by Cambridge University Press:  31 January 2011

Jining Xie*
Affiliation:
Nanomaterials and Nanotubes Research Laboratory, Department of Electrical Engineering, College of Engineering, University of Arkansas, Fayetteville, Arkansas 72701
Shouyan Wang
Affiliation:
Nanomaterials and Nanotubes Research Laboratory, Department of Electrical Engineering, College of Engineering, University of Arkansas, Fayetteville, Arkansas 72701
L. Aryasomayajula
Affiliation:
Nanomaterials and Nanotubes Research Laboratory, Department of Electrical Engineering, College of Engineering, University of Arkansas, Fayetteville, Arkansas 72701
V.K. Varadan
Affiliation:
Nanomaterials and Nanotubes Research Laboratory, Department of Electrical Engineering, College of Engineering, University of Arkansas, Fayetteville, Arkansas 72701
*
a)Address all correspondence to this author. e-mail: jxie@uark.edu
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Abstract

The effect of nanomaterials in platinum-decorated, multiwalled, carbon nanotube-based electrodes for amperometric glucose sensing was investigated by a comparative study with other carbon material-based electrodes such as graphite, glassy carbon, and multiwalled carbon nanotubes. Scanning and transmission electron microscopy and x-ray diffraction were used to investigate their morphologies and crystallinities. Electrochemical impedance spectroscopy was conducted to compare the electrochemical characteristics of these electrodes. The glucose-sensing results from the chronoamperometric measurements indicated that carbon nanotubes improve the linearity of the current response to glucose concentrations over a wide range, and that platinum decoration of the carbon nanotubes produces improved electrochemical performance with a higher sensitivity.

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Articles
Copyright
Copyright © Materials Research Society 2008

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