Reaction dynamics of liquid droplets: developments of scanning cavity enhanced droplet spectroscopy and droplet-collision apparatus
Fast reaction dynamics in solutions has been extensively studied so far by use of a pump-probe method, chemical relaxation, and so on. Those studies, however, have been limited to reactions in homogeneous media, where the reactions are triggered by fast energy injection to the media, such as a laser irradiation, a short electric pulse or whatever. On the other hand, chemical reactions induced by mixing two solutions are the most versatile and of great importance in chemistry. When we aim to fully understand such reactions, interface dynamics of the solutions, such as coalescence of the reactant solutions, must be taken into account. From this point of view, we focus on collisional chemical reactions of small liquid droplets, because we can follow a time evolution of the colliding droplets precisely by employing piezo-driven droplet nozzles.