Are we at the limits of measuring water-repellent surfaces?
(PHYSorg.com Physics)

How liquids are repelled by a surface, a property called `wettability,` is important for engineers to develop aircraft that resist ice formation, for fashion designers developing outdoor gear that repels rain and dirt, and many other fields. Researchers developing whole new surface materials in the lab also need accurate measurement of wetting properties so they can compare how different surfaces behave.