One-Step Fabrication of Hierarchically Structured Silicon Surfaces and Modification of Their Morphologies Using Sacrificial Layers
Figure 7
(a) Antiwettability test of the high-density nanograss surface with a 5 μL sessile water drop (static water contact angle = 165° and sliding angle <1°). (b) Antiwettability test of a micro/nanohierarchically structured surface (static water contact angle = 170° and sliding angle <1°). The air gap between the drop and the surface (white arrow) was observed optically, due to the hierarchical surface’s superior antiwettability.
