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.