Chemical Wave Propagation Preserved on an Inhibitory Field in the Ruthenium-Catalyzed Belousov鈥揨habotinsky Reaction

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• 作者：Satoshi Nakata ; Takato Ezaki ; Yumihiko S. Ikura ; Hiroyuki Kitahata
• 刊名：Journal of Physical Chemistry A
• 出版年：2013
• 出版时间：October 17, 2013
• 年：2013
• 卷：117
• 期：41
• 页码：10615-10618
• 全文大小：276K
• 年卷期：v.117,no.41(October 17, 2013)
• ISSN：1520-5215

文摘

The propagation of a chemical wave on an inhibitory field, which was wedged between two excitable fields, was investigated for the photosensitive Belousov鈥揨habotinsky (BZ) reaction. With an increase in the width of the inhibitory field between the excitable fields (W), the chemical wave divided into two waves at W = W_伪. The divided chemical waves then coalesced at W = W_尾 with a decrease in W. W_伪 was larger than W_尾, i.e., hysteresis on the width of the inhibitory field was observed between the division and coalescence of the chemical wave. The experimental results were qualitatively reproduced by a numerical calculation based on a three-variable Oregonator model modified for the photosensitive BZ reaction. These results suggest that the chemical wave may be preserved on the inhibitory field due to an activator supplied from a chemical wave on the excitable field.