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Updated: Dec 11, 2025

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Bioimaging using bipolar electrochemical microscopy with improved spatial resolution.

Tomoki Iwama1, Kumi Y Inoue, Hiroya Abe

  • 1Graduate School of Environmental Studies, Tohoku University, Sendai, Miyagi, Japan. kumi.inoue.b3@tohoku.ac.jp hitoshi.shiku.c3@tohoku.ac.jp.

The Analyst
|August 22, 2020
PubMed
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We developed bipolar electrochemical microscopy (BEM) with a closed bipolar electrode (cBPE) array for high-resolution imaging. This novel technique successfully visualized [Fe(CN)6]3- diffusion and cell respiration with excellent spatio-temporal detail.

Area of Science:

  • Electrochemistry
  • Microscopy
  • Biosensing

Background:

  • Conventional microelectrode arrays face limitations in achieving high spatio-temporal resolution.
  • Direct detector connection in bipolar electrodes can hinder imaging capabilities.

Purpose of the Study:

  • To develop a novel bipolar electrochemical microscopy (BEM) technique.
  • To achieve high spatio-temporal resolution imaging using a closed bipolar electrode (cBPE) array and electrochemiluminescence (ECL).

Main Methods:

  • Fabrication of a cBPE array using gold deposition in a track-etched membrane via electroless plating.
  • Arrangement of individual cBPEs at 41 μm intervals for high electrode density.
  • Utilizing an electrochemiluminescence (ECL) detection system with the BEM setup.

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Last Updated: Dec 11, 2025

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Main Results:

  • Successful fabrication of a high-density cBPE array.
  • Demonstration of high spatio-temporal resolution imaging of [Fe(CN)6]3- diffusion.
  • Effective imaging of MCF-7 spheroid respiratory activity using the developed BEM system.

Conclusions:

  • The developed BEM technique with a cBPE array offers superior spatio-temporal resolution compared to conventional methods.
  • This approach enables detailed visualization of electrochemical processes and biological activities at the microscale.
  • BEM holds significant potential for advanced electrochemical and biological imaging applications.