The light-driven macroscopic directional motion of a water droplet on an azobenzene–calix[4]arene modified surface†
Abstract
A novel photo-responsive surface was constructed via modifying azobenzene-calix[4]arene (ABC4) on a microstructured silicon surface. Asymmetric UV light irradiation could drive the macroscopic directional motion of a water droplet on this photo-responsive surface.