Formation of Hierarchical Porous Structure via Breath Figure Method

Figure 6

Schematic illustration for the formation of the hierarchical structure. (a) Water droplets approaching the PS solution. (b) Condensation of the first layer droplets. (c) Coalescence of the larger droplets. (d) Successive condensation and sedimentation of the coalesced droplets. (e) Formation of the final hierarchical structure.

(a)

(b)

(c)

(d)

(e)