Bidirectional wave-propelled capillary spinners

Abstract When a solid body floats at the interface of vibrating liquid bath, motion object generates outwardly propagating surface waves. We here demonstrate that chiral objects on fluid are set into steady rotation, with angular speed and direction rotation controlled by interplay between geometry driving parameters. Scaling laws simplified model wavefield reveal underlying physical mechanism while collapsing measurements velocity across Leveraging control over object’s we an asymmetric mass distribution chirality can be remotely steered along two-dimensional trajectories via modulation frequency. This accessible tunable macroscopic system serves as potential platform for explorations active driven matter, demonstrates which wave-mediated forces manipulated directed propulsion.