Chemical engineering, Technion - Israel Institute of Technology
The principles of super-hydrophobicity and super-hygrophobicity are presented in an intuitive way. Then they are backed up by the theoretical principles of wetting. In particular, the recent apparent discrapancy between the claims that wetting is determined only by the contact line vs. being dependent on the wetted area is explained. First, super-hydrophobicity in air is described. Then, under-water super-hydrophobicity is presented. Finally, super-hygrophobicity is discussed ("hygro" is a liquid, in general, in Greek), and shown to always be metastable. Some emphasis is put on terminology, in order to standardize wettability concepts.
