Spatio-temporally developed phenomena by introducing anisotropy of chemical reaction fields and nonequilibrium conditions

点击翻译按钮获取中文摘要

Our purpose of this research is to clarify the mechanism of spatio-temporally developed phenomena at an immiscible interface under the anisotropic and nonequilibrium conditions. Actually, we investigated a change in the mode of self-motion was investigated for a camphor disk on water upon the addition of sulfate surfactants with alkyl chains of different lengths as a simple autonomous system. With an increase in the concentration of surfactant with a longer alkyl chain, two mode changes (continuous -> intermittent oscillatory -> no motion) were observed. With an increase in the concentration of surfactant with a shorter alkyl chain, four mode changes (continuous -> oscillatory -> continuous -> oscillatory -> no motion) were observed. These two types of mode changes are discussed in relation to the solubility of the surfactant and camphor in the water phase and the surface tension of the surfactant, camphor, and a mixture of surfactant and camphor as the driving force of motion. We also examined (1) the relati ship between mode-switching and synchronization, (2) mode-change depending on the external environment, and (3) rate balance between reaction and diffusion system.