Self-sustained oscillations of electric potential in a model membrane

Kiyoshi Toko, Masaru Tsukiji, Satoru Iiyama, Kaoru Yamafuji

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)


A model membrane constructed from a Millipore filter, whose pores are filled with dioleyl phosphate molecules, exhibits a self-oscillation of the electric potential with a period of about a few seconds in the presence of a salt-concentration difference, pressure difference and/or electric current across the filter. In this paper, the effects of chemicals such as KCl, CaCl2, pH and sucrose on the self-oscillation are investigated experimentally. These chemical substances are shown to alter the characteristic properties as the frequency of oscillation. Theoretical consideration of electrochemical interaction between these substances and DOPH molecules gives a fairly good explanation of the observed results.

Original languageEnglish
Pages (from-to)201-210
Number of pages10
JournalBiophysical Chemistry
Issue number3-4
Publication statusPublished - Mar 1986

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Biochemistry
  • Organic Chemistry


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