Redox potential imaging sensor

N. Oba, T. Yoshinobu, H. Iwasaki

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


We developed a chemical imaging sensor which can be used to visualize the spatial distribution and temporal evolution of redox potential in chemical reaction systems. It is based on the light-addressable potentiometric sensor (LAPS), in which the insulating surface is found to be sensitive not only to the pH value but also to the redox potential of the adjacent electrolyte: a voltage shift of 50.3 mV/decade was observed for the [K3Fe(CN)6]/[K4Fe(CN)6] system. We show that it is possible to measure the distribution of redox potential with high speed (22 s for 64×64 pixels) using this sensor.

Original languageEnglish
Pages (from-to)L460-L463
JournalJapanese Journal of Applied Physics, Part 2: Letters
Issue number4 A
Publication statusPublished - 1996
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)


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