Figure 2From: Stable superhydrophobic surface of hierarchical carbon nanotubes on Si micropillar arraysContact and sliding angles of water droplets on CNTs/Si and CNTs/Si-μp. Contact angles of water droplets on (a) CNTs/Si and (b) CNTs/Si-μp. Sliding angles of water droplets on (c) CNTs/Si and (d) CNTs/Si-μp. The volume of water droplets is 7 μL.Back to article page