Unidirectional propagation of chemical waves through microgaps between zones with different excitability

Kenji Suzuki, Tatsuo Yoshinobu, Hiroshi Iwasaki

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

Unidirectional propagation of chemical waves in the Belousov-Zhabotinsky (BZ) reaction system was demonstrated using patterns of a BZ catalyst on a cation-exchange membrane. The unidirectional propagation was observed when the chemical waves entered catalyst-less microgaps separating catalyst zones with different thicknesses on the membrane. The chemical waves could pass through the microgaps from a thinner catalyst zone and could not pass through the microgaps from a thicker catalyst zone. The study shows that the asymmetry of excitability of the both zones and the gap width between them are key factors that caused the unidirectional propagation. Computer simulations reproduce the unidirectional propagation.

Original languageEnglish
Pages (from-to)6602-6608
Number of pages7
JournalJournal of Physical Chemistry A
Volume104
Issue number28
DOIs
Publication statusPublished - 2000
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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