Characterization of new structural ion sensor for sodium ion

Tatsuya Komori, Takafumi Yamamoto, Kazuyo Oda, Kenji Sakai, Toshihiko Kiwa, Keiji Tsukada

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


We developed a new structural ion sensor for measuring sodium ions without using a reference electrode. The ion sensor, which is all solid state, has a structure of double electrodes, which are integrated on the base plate, inside the sodium ion sensitive membrane. The ion sensitivity of the sensor was 41.4 mV/decade in the range of 10-1 to 10-4M. To investigate the response mechanism of the potential between two electrodes, the impedance characteristic was measured using the electrochemical impedance method. The impedance of the ion sensitive membrane changed by changing the sodium ion concentration in solution. These results suggest a correlation between the membrane potential and the membrane impedance. In conclusion, the potential difference between the electrodes is caused by the difference in ion concentration of the electrodes.

Original languageEnglish
Pages (from-to)309-313
Number of pages5
JournalIEEJ Transactions on Sensors and Micromachines
Issue number7
Publication statusPublished - Jul 17 2013


  • Electrochemical impedance method
  • Ion sensitive membrane
  • Ion sensor
  • Sodium ion

ASJC Scopus subject areas

  • Mechanical Engineering
  • Electrical and Electronic Engineering


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