High‐Speed Superhydrophobic Swimmers Propelled by Restricted Droplets

Abstract Swimmers that can convert external energy to dynamic movement have shown great potential in different fields; however, their applications are restrained due the demerits of high cost, environmental pollution, and low efficiency exiting propelling methods. Herein, droplets proposed use whose motions restricted fixed positions or specified areas propel a superhydrophobic swimmer with superhydrophilic wedge‐shaped pattern effectively. This method by more effectively droplet surface kinetic swimmer, thereby achieving high‐efficient propulsion swimmer. The mechanism force analyzed detail, be controlled parameters including wedge angle, volume, needle size. Based on phenomenon, an accelerator is further developed promote hanging move along specific tracks, achieve rapid swimmers water surface. In addition, capable reciprocating precise control position direction also designed, which may provide new strategy for microdevices intelligent systems.