The term “functionalized surface” is used to designate a set of materials whose surfaces exhibit exceptional behaviors due to their invisible structures and textures. For example, a superhydrophobic surface, like that of a lotus leaf, is very difficult to wet. Water flows rapidly over it, never soaking into the material. This phenomenon is the result of a complex structure on a microscopic scale, invisible to the naked eye.
Water Tower is a set of circuits for water droplets. The plaster slabs are covered with a superhydrophobic polymer that repels water drops. Various types of blocks (straight channels, turns, loops…) make it possible to play with and gain an understanding of this invisible physical phenomenon.