title: Response of a chemical wave to local pulse irradiation in the ruthenium-catalyzed Belousov-Zhabotinsky reaction.
abstract: The photo-sensitive Belousov-Zhabotinsky (BZ) reaction system was investigated to understand the response of wave propagation to local pulse stimulation in an excitable field. When the chemical wave was irradiated with a bright pulse or a dark pulse, the speed of wave propagation decreased or increased. The timing of pulse irradiation that significantly affected the speed of chemical wave propagation was different with the bright and dark pulses. That is, there is a sensitive point in the chemical wave. The experimental results were qualitatively reproduced by a numerical calculation based on a three-variable Oregonator model that was modified for the photosensitive BZ reaction. These results suggest that the chemical wave is sensitive to the timing of pulse irradiation due to the rates of production of an activator and an inhibitor in the photochemical reaction.
authors.affiliation: Graduate School of Science, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima 739-8526, Japan. nakatas@hiroshima-u.ac.jp.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Nakata
authors.forename: Shogo
authors.initials: S
authors.lastname: Suzuki
authors.forename: Takato
authors.initials: T
authors.lastname: Ezaki
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Kitahata
authors.forename: Kei
authors.initials: K
authors.lastname: Nishi
authors.forename: Yasumasa
authors.initials: Y
authors.lastname: Nishiura
mesh_terms: D002384:Catalysis; D003198:Computer Simulation; D008962:Models, Theoretical; D010777:Photochemistry; D012428:Ruthenium / Q000737:chemistry*
chemical_list: D012428:Ruthenium