articleAnalytical ChemistryMar 30, 2002Closed access

Direct Electrochemistry of Cytochrome c at a Glassy Carbon Electrode Modified with Single-Wall Carbon Nanotubes

JWJianxiu WangMLMeixian LiZSZujin ShiNLNanqiang LiZGZhennan Gu

Peking University

PubMed
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Abstract

The electrochemistry of horse heart cytochrome c was studied by cyclic voltammetry at a glassy carbon electrode modified with single-wall carbon nanotubes (SWNTs). A pair of well-defined redox waves was obtained in cytochrome c aqueous solution at an activated SWNT film-modified electrode. The optimal conditions for activating the SWNT film-modified electrode has been determined. The electrode reaction of cytochrome c is a diffusion-controlled process. The peak current increases linearly with the concentration of cytochrome c in the range from 3.0 x 10(-5)-7.0 x 10(-4) M. The detection limit is 1.0 x 10(-5) M. The activated SWNT film was characterized by scanning electron microscopy. Furthermore, interaction…

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Topics & keywords

Topics
Keywords
  • Chemistry
  • Electrode
  • Cyclic voltammetry
  • Cytochrome c
  • Electrochemistry
  • Carbon nanotube
  • Glassy carbon
  • Redox
UN Sustainable Development Goals
  • Clean water and sanitation
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