Nano Research

, Volume 2, Issue 3, pp 210–219 | Cite as

Myoglobin/gold nanoparticles/carbon spheres 3-D architecture for the fabrication of a novel biosensor

  • Xiao Chen
  • Jing Jing Zhang
  • Jie Xuan
  • Jun Jie Zhu
Open Access
Research Article

Abstract

A novel biosensor based on a myoglobin/gold nanoparticles/carbon spheres (Mb-AuNPs-CNs) 3-D architecture bioconjunction has been fabricated for the determination of hydrogen peroxide (H2O2). Cyclic voltammetry (CV), Fourier transform infrared (FT-IR) spectroscopy and scanning electron microscopy (SEM) were used to characterize the bioconjunction of the AuNPs-CNs with Mb. Experimental results demonstrate that the AuNPs-CNs hybrid material is more effective in facilitating electron transfer of the immobilized enzyme than CNs alone, which can be attributed to the unique nanostructure and larger surface area of the bioconjunction. The biosensor displayed good performance for the detection of H2O2 with a wide linear range from 0.28 μmol/L to 116.5 μmol/L and a detection limit of 0.12 μmol/L. The Michaelis-Menten constant KMapp value was estimated to be 0.3 mmol/L. The resulting biosensor exhibited fast amperometric response, and good stability, reproducibility, and selectivity to H2O2.

Keywords

Biosensor myoglobin gold nanoparticles carbon spheres hydrogen peroxide direct electron transfer 

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Copyright information

© Tsinghua University Press and Springer-Verlag GmbH 2009

Authors and Affiliations

  • Xiao Chen
    • 1
  • Jing Jing Zhang
    • 1
  • Jie Xuan
    • 1
  • Jun Jie Zhu
    • 1
  1. 1.Key Laboratory of Analytical Chemistry for Life Science, Ministry of Education, School of Chemistry and Chemical EngineeringNanjing UniversityNanjingChina

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