Sensors (Aug 2020)

Development Perspective of Bioelectrocatalysis-Based Biosensors

  • Taiki Adachi,
  • Yuki Kitazumi,
  • Osamu Shirai,
  • Kenji Kano

DOI
https://doi.org/10.3390/s20174826
Journal volume & issue
Vol. 20, no. 17
p. 4826

Abstract

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Bioelectrocatalysis provides the intrinsic catalytic functions of redox enzymes to nonspecific electrode reactions and is the most important and basic concept for electrochemical biosensors. This review starts by describing fundamental characteristics of bioelectrocatalytic reactions in mediated and direct electron transfer types from a theoretical viewpoint and summarizes amperometric biosensors based on multi-enzymatic cascades and for multianalyte detection. The review also introduces prospective aspects of two new concepts of biosensors: mass-transfer-controlled (pseudo)steady-state amperometry at microelectrodes with enhanced enzymatic activity without calibration curves and potentiometric coulometry at enzyme/mediator-immobilized biosensors for absolute determination.

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