A unique process causes the coacervates formed during the evaporation process to appear as hemispheres (Figures 3C and 3E). This phenomenon can be explained by the semisolid behavior of the coacervates. As the water level decreases during evaporation, the surface tension pushes the coacervates downwards, forming a flat surface at the water-air interface (Figure ). To show that this is the correct process in which the hemispheres are formed, and that they are not formed due to fracture of previously coalesced semisolid droplets, we performed Cryo-SEM imaging on a solution of coacervates formed during evaporation. The resulting images show that the flat surfaces of different hemispheres are pointing towards the water-air interface, in accordance with the slope of the solution droplet (Figures and). Similarly to the coacervates formed in solution, small coacervates were observed in the size range of ~100 nm.