Direct electrochemistry of glucose oxidase at carbon nanotube-gold colloid modified electrode with poly(diallyldimethylammonium chloride) coating

Yan Li Yao*, Kwok Keung SHIU

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

82 Citations (Scopus)

Abstract

Glucose oxidase showed direct electrochemical transfer at glassy carbon electrodes immobilized with carbon nanotube-gold colloid (CNT-Au) composites with poly(diallydimethylammonium chloride) (PDDA) coatings. The modified electrode (GC/CNT/Au/PDDA-GOD) was employed for the amperometric determination of glucose. Under optimal conditions, the biosensor displayed linear response to glucose from 0.5 to 5 mM with a sensitivity of 2.50 mA M-1 at an applied potential of -0.3 V (vs. Ag|AgCl reference).

Original languageEnglish
Pages (from-to)1542-1548
Number of pages7
JournalElectroanalysis
Volume20
Issue number14
DOIs
Publication statusPublished - Jul 2008

Scopus Subject Areas

  • Analytical Chemistry
  • Electrochemistry

User-Defined Keywords

  • Carbon nanotubes
  • Direct electrochemistry
  • Glucose biosensor
  • Gold nanoparticles
  • Poly(diallyldimethylammonium chloride)

Fingerprint

Dive into the research topics of 'Direct electrochemistry of glucose oxidase at carbon nanotube-gold colloid modified electrode with poly(diallyldimethylammonium chloride) coating'. Together they form a unique fingerprint.

Cite this