Publications


Title : Size-Dependent Switching of the Spatiotemporal Structure Between a Traveling Wave and Global Rhythm

Language: English
Type: Article
Authors: Ryoichi Aihara and Kenichi Yoshikawa
Journal: Journal of Physical Chemistry A
ISSN: 1089-5639
Volume: 105
Number: 37
Month: 9
Year: 2001
Actual year: 2001
Pages: 8445-8448
doi:   10.1021/jp010908r
Abstract: The spatiotemporal chemical structure in the Belousov-Zhabotinsky (BZ) reaction was studied using spherical beads of ion-exchange resin doped with ferroin by changing the size of the beads. Above an upper critical size (ca. 0.8 nm in diameter), chemical waves emerge and propagate on the surface of a bead by forming a target or spiral pattern. Below a lower critical size (ca. 0.62 mm in diameter); uniform global oscillation over the entire bead is observed; i.e., no traveling wave is observed. Between these upper and lower critical sizes, the reaction is bistable with regard to the two different modes, i.e., uniform oscillation and a traveling wave. This experimental trend is discussed in terms of competition between the growth rate and diffusion rate of the activator.

"Size-Dependent Switching of the Spatiotemporal Structure Between a Traveling Wave and Global Rhythm"

Ryoichi Aihara and Kenichi Yoshikawa, Journal of Physical Chemistry A, 105, 8445-8448 (2001)