Extreme Wetting-Resistant Multiscale Nano-/Microstructured Surfaces for Viscoelastic Liquid Repellence

Figure 7

SEM micrographs showing plane view (top) and cross section (bottom) of the nanoparticle coating films for (a) initial precipitated silica and (b) after 3 days of induced aggregation reaction. The solid and dashed circles indicate secondary and tertiary particles, respectively.

(a)

(b)