Collective motion is ubiquitous in living systems. Even though many biomimetic artificial systems happen to be constructed, there have already been couple of research reported on collective motion induced by the coupling of chemical reactions, diffusion and convection within a far-from-equilibrium state. Within this study, we report an artificial method of oil droplets in a surfactant resolution wherein the collective motion of multiple droplets and pattern formation occurred concurrently. Working with photo-responsive surfactants with an azobenzene moiety, the assembly of droplets and the formation of circular patterns about the formed droplet clusters occurred below UV illumination, whereas the disassembly of droplets and disappearance on the patterns occurred under subsequent visible light illumination. The observed dynamics had been induced by Marangoni flows based on the reversible photoisomerisation of azobenzene-containing surfactants. The phenomena had been viewed as analogous to the bioconvection of microorganisms. These findings could possibly be useful for understanding the mechanism of motion of life with regards to physicochemical elements. Methyl 4-hydroxyphenylacetate Data Sheet 1445-55-2 uses PMID:23771862