Adhesion Mechanism of Water Droplets on Hierarchically Rough Superhydrophobic Rose Petal Surface

Figure 3

Wetting and adhesion mechanism on the high-adhesive superhydrophobic rose petal surface. Air gets entrapped between the micrometric nubs of the surface. Formation of the liquid-solid-air composite interface is essential for superhydrophobicity of the surface. Grooved fine structure on top of the nubs anchors water droplets tightly to the surface.