Bioimaging using bipolar electrochemical microscopy with improved spatial resolution

Tomoki Iwama, Kumi Y. Inoue, Hiroya Abe, Tomokazu Matsue, Hitoshi Shiku

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


In this study, we developed bipolar electrochemical microscopy (BEM) using a closed bipolar electrode (cBPE) array with an electrochemiluminescence (ECL) detecting system. Because cBPEs are not directly connected to a detector, high spatio-temporal resolution imaging can be achieved by fabricating a microelectrode array in which each electrode point is arranged in a short interval. A cBPE array with individual cBPEs arranged in 41 μm intervals was successfully fabricated by depositing gold in the pores of a track-etched membrane using electroless plating. Using BEM with the cBPE array, which has a higher density of electrode points than the conventional multi-electrode array, we effectively demonstrated the imaging of [Fe(CN)6]3- diffusion and the respiratory activity of MCF-7 spheroids with high spatio-temporal resolution.

Original languageEnglish
Pages (from-to)6895-6900
Number of pages6
JournalThe Analyst
Issue number21
Publication statusPublished - 2020 Nov 7


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