a-Superhydrophobic lotus leaf.

b-Enlarged SEM photo of the lotus leaf.

c-Higher magnification of the lotus leaf showing the microsized papillae.

d-The microsized papillae that contains many nanosized branch like protrusion.

Heterogenous or Cassie Superhydrophobic surface. In the  heterogenous case a layer of air separate the water from the surface.

Homogenous or Wenzel Superhydrophobic surface.In the homogenous case no air is trapped between the water and the surface.