Spontaneous deposition of prussian blue on reduced graphene oxide - gold nanoparticles composites for the fabrication of electrochemical biosensors

Xiaoyun Bai, Kwok Keung SHIU*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

A reduced graphene oxide-gold nanoparticles-Prussian blue (RGO-AuNPs-PB) composite was prepared by spontaneous deposition of PB on RGO-AuNPs surface. The GC/RGO-AuNPs-PB modified electrode offered good electrocatalytic activity toward the reduction of hydrogen peroxide, indicating the possible synergistic effects of the RGO-AuNPs-PB composite material. Direct electron transfer of glucose oxidase (GOD) can be realized after codeposition of GOD and chitosan (CHIT) coating on GC/RGO-AuNPs-PB electrode. The resulting GC/RGO-AuNPs-PB/GOD-CHIT biosensor exhibited an excellent amperometric response to glucose with a sensitivity of 84mAM-1cm-2, and a linear range from 13μM to 2.0mM at +0.1V vs. Ag|AgCl reference.

Original languageEnglish
Pages (from-to)74-83
Number of pages10
JournalElectroanalysis
Volume27
Issue number1
DOIs
Publication statusPublished - 1 Jan 2015

Scopus Subject Areas

  • Analytical Chemistry
  • Electrochemistry

User-Defined Keywords

  • Biosensors
  • Composite materials
  • Prussian blue
  • Reduced graphene oxide
  • Spontaneous deposition

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