Low potential detection of glucose at carbon nanotube modified glassy carbon electrode with electropolymerized poly(toluidine blue O) film

Yan Li Yao, Kwok Keung SHIU*

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

52 Citations (Scopus)

Abstract

A mediator glucose biosensor has been constructed by immobilizing glucose oxidase at electropolymerized poly(toluidine blue O) film on carbon nanotube modified glass carbon electrode. The toluidine blue O moieties served as redox mediators for enzymatic glucose oxidation and as polymeric network to maintain the biosensor activity. Great enhancement in current response was observed for the glucose biosensor. The detection potential could be decreased to -0.1 V (versus Ag|AgCl), where common interferences such as ascorbic acid, uric acid and acetamidophenol were not oxidized to cause interferences. The amperometric glucose biosensor offered a sensitivity of 14.5 mA M-1 cm-2 for the linear range of 1-7 mM.

Original languageEnglish
Pages (from-to)278-284
Number of pages7
JournalElectrochimica Acta
Volume53
Issue number2
DOIs
Publication statusPublished - 1 Dec 2007

Scopus Subject Areas

  • Chemical Engineering(all)
  • Electrochemistry

User-Defined Keywords

  • Carbon nanotubes
  • Glucose determination
  • Mediator electrode
  • Toluidine blue O

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