Nakata Satoshi, Suzuki Shogo, Ezaki Takato, Kitahata Hiroyuki, Nishi Kei, Nishiura Yasumasa
Graduate School of Science, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima 739-8526, Japan.
Phys Chem Chem Phys. 2015 Apr 14;17(14):9148-52. doi: 10.1039/c5cp00897b. Epub 2015 Mar 11.
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.
研究了光敏Belousov-Zhabotinsky（BZ）反应体系，以了解波动传播在可激发场中对局部脉冲刺激的响应。当化学波受到亮脉冲或暗脉冲照射时，波动传播速度会降低或增加。显著影响化学波传播速度的脉冲照射时间，亮脉冲和暗脉冲有所不同。也就是说，化学波中存在一个敏感点。基于为光敏BZ反应修改的三变量俄勒冈振子模型进行的数值计算，定性地再现了实验结果。这些结果表明，由于光化学反应中活化剂和抑制剂的生成速率，化学波对脉冲照射时间敏感。
