K+ -selective field-effect sensors as transducers for bioelectronic applications

Yu Mourzina, Th Mai, A. Poghossian, Yu Ermolenko, T. Yoshinobu, Yu Vlasov, H. Iwasaki, M. J. Schöning

Research output: Contribution to journalArticlepeer-review

44 Citations (Scopus)


A K+-sensitive capacitive electrolyte-membrane-insulator-semiconductor (EMIS) sensor has been developed. The sensor utilizes a valinomycin-containing PVC-based membrane with different contents of plasticizer. This new type of sensor has been investigated in terms of its intrinsic characteristics, like impedance behavior, capacitance/voltage characteristics and frequency dependence. The optimized working conditions of the sensor and various membrane compositions have been studied with regard to the sensitivity performance in different electrolytes. The possibility of future applications for the measurement of extracellular potassium-ion concentrations are discussed.

Original languageEnglish
Pages (from-to)3333-3339
Number of pages7
JournalElectrochimica Acta
Issue number20-22
Publication statusPublished - 2003 Sept 30


  • Capacitance/voltage method
  • Capacitive field-effect sensor
  • Electrolyte/membrane/insulator/semiconductor structure
  • Impedance spectroscopy
  • PVC-based membrane
  • Potassium sensitivity


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