Effects of halide ions on the acceptor phase in spontaneous chemical oscillations in donor/membrane/acceptor systems

Time-Resolved Measurements of Interfacial Tension and Flow Speed of the Inclined Water Surface around a Self-propelled Camphor Boat by the Quasi-elastic Laser Scattering Method

“…There are also techniques that observe the deformed shapes of liquids, such as the pendant drop method or oscillating-jet method, but they are also not suitable for in situ observations of the position-dependent interfacial tension. For in situ measurements of systems in motion, the authors have applied optical methods to observe the light scattering derived from capillary waves generated by thermal fluctuations of the interface. ,,− This method, called quasi-elastic laser scattering (QELS), enables not only noncontact and noninvasive measurement of the interfacial tension but also surface flow measurements . Hence, it is very suitable for the measurement of phenomena involving motions, and the authors so far have studied camphor boats, , self-propelled droplets, amoeba-like oil droplets, and oscillatory reactions. − , On the other hand, because the QELS method observes the Brillouin scattering by ripplons at a specific angle, the obtained signal has an inclination angle dependence of the interface, and artifacts sometimes appear when an interfacial deformation occurs in a simple measurement system.…”

“…37 Hence, it is very suitable for the measurement of phenomena involving motions, and the authors so far have studied camphor boats, 23,24 self-propelled droplets, 27 amoeba-like oil droplets, 36 and oscillatory reactions. [29][30][31]35 On the other hand, because the QELS method observes the Brillouin scattering by ripplons at a specific angle, the obtained signal has an inclination angle dependence of the interface, and artifacts sometimes appear when an interfacial deformation occurs in a simple measurement system. There is also a detection problem for the refracted referential local oscillator light especially when there is interfacial deformation.…”