Electron-transfer properties of different carbon nanotube materials, and their use in glucose biosensors

Yanli Yao, Kwok Keung SHIU*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

54 Citations (Scopus)

Abstract

Different types of carbon nanotube material (single-walled carbon nanotubes (SWCNTs) and multi-walled carbon nanotubes (MWCNTs) of different internal diameter) have been used for preparation of CNT-modified glassy-carbon electrodes. Redox reactions involving ferricyanide and hydrogen peroxide were examined at the CNT-modified electrodes. Electrodes modified with SWCNTs usually had better electron-transfer properties than MWCNT-modified electrodes. Glucose biosensors were also prepared with electropolymerized polyphenylenediamine films, CNT materials, and glucose oxidase. Amperometric behavior in glucose determination was examined. SWCNT-modified glucose biosensors usually had a wider dynamic range (from 0.1 to 5.5 mmol L-1) and greater sensitivity in glucose determination. The detection limit was estimated to be 0.05 mmol L-1.

Original languageEnglish
Pages (from-to)303-309
Number of pages7
JournalAnalytical and Bioanalytical Chemistry
Volume387
Issue number1
DOIs
Publication statusPublished - Jan 2007

Scopus Subject Areas

  • Analytical Chemistry
  • Biochemistry

User-Defined Keywords

  • Carbon nanotubes
  • Electron-transfer properties
  • Glucose biosensors
  • Polyphenylenediamine
  • Tube internal diameter

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