Dominant Factors Governing the Electron Transfer Kinetics and Electrochemical Biosensing Properties of Carbon Nanofiber Arrays

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

7 Scopus Citations
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Author(s)

  • Liangsheng Hu
  • Kaifu Huo
  • Rongsheng Chen
  • Jijiang Fu
  • Yong Li
  • Lawrence Yoon Suk Lee
  • Kwok-Yin Wong

Detail(s)

Original languageEnglish
Pages (from-to)28872-28879
Journal / PublicationACS Applied Materials and Interfaces
Volume8
Issue number42
Publication statusPublished - 26 Oct 2016

Abstract

Carbon-based electrodes have been widely used in electroanalysis for more than half a century, but the factors governing the heterogeneous electron-transfer (HET) rate are still unclear. The effects of the exposed edge plane site density, inherent resistance of the carbon electrode, and adjustable resistors on the HET kinetics of several outer- and inner-sphere redox couples including [Fe(CN)6]3-/4-, Ru(NH3)6 3+/2+, Fe3+/2+, dopamine, ascorbic acid, and uric acid are investigated using three kinds of carbon electrodes composed of core-shell quasi-aligned nanofiber arrays (QANFAs). The internal resistance is found to be a key factor affecting the HET kinetics and electrochemical biosensing properties. The electrodes exhibit high selectivity and sensitivity in dopamine detection in the presence of ascorbic acid and uric acid. In addition to the promising application to electrochemical biosensing, the core-shell TiC/C QANFAs encompassing a highly electroactive carbon shell and conductive TiC core provide insights into the design and construction of the ideal carbon electrode.

Research Area(s)

  • carbon electrode, core-shell nanofiber, dopamine, electrochemical biosensor, electron transfer kinetics

Citation Format(s)

Dominant Factors Governing the Electron Transfer Kinetics and Electrochemical Biosensing Properties of Carbon Nanofiber Arrays. / Hu, Liangsheng; Peng, Xiang; Huo, Kaifu; Chen, Rongsheng; Fu, Jijiang; Li, Yong; Lee, Lawrence Yoon Suk; Wong, Kwok-Yin; Chu, Paul K.

In: ACS Applied Materials and Interfaces, Vol. 8, No. 42, 26.10.2016, p. 28872-28879.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review