Next Article in Journal
A Disposable Sensor For Assessing Artocarpus heterophyllus L. (Jackfruit) Maturity
Previous Article in Journal
Catalytic Oxidation of Thiourea at Alumina Modified Pt Electrode
Article Menu

Article Versions

Export Article

Open AccessArticle
Sensors 2003, 3(12), 544-554; doi:10.3390/s31200544

Direct Electrochemistry of Glucose Oxidase at a Gold Electrode Modified with Single-Wall Carbon Nanotubes

1
Department of Chemistry, Graduate School, University of Science and Technology of China, Beijing P. R. 100039, China
2
Department of Chemistry, Graduate School, Chinese Academy of Science, Beijing P. R. 100039, China
*
Author to whom correspondence should be addressed.
Received: 8 August 2003 / Accepted: 15 November 2003 / Published: 31 December 2003
Download PDF [188 KB, uploaded 20 June 2014]

Abstract

The direct electrochemistry of glucose oxidase (GOD) was accomplished at a gold electrode modified with single-wall carbon nanotubes (SWNTs). A pair of welldefined redox peaks was obtained for GOD with the reduction peak potential at –0.465 V and a peak potential separation of 23 mV at pH 7.0. Both FT-IR spectra and the dependence of the reduction peak current on the scan rate revealed that GOD adsorbed onto the SWNT surfaces. The redox wave corresponds to the redox center of the flavin adenine dinucleotide(FAD) of the GOD adsorbate. The electron transfer rate of GOD redox reaction was greatly enhanced at the SWNT-modified electrode. The peak potential was shown to be pH dependent. Verified by spectral methods, the specific enzyme activity of GOD adsorbates at the SWNTs appears to be retained.
Keywords: Glucose oxidase ; SWNT-modified electrode; Direct Electrochemistry Glucose oxidase ; SWNT-modified electrode; Direct Electrochemistry
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Liang, W.; Zhuobin, Y. Direct Electrochemistry of Glucose Oxidase at a Gold Electrode Modified with Single-Wall Carbon Nanotubes. Sensors 2003, 3, 544-554.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top