Agile Underwater Swimming of Magnetic Polymeric Microrobots in Viscous Solutions

Miniaturization of polymeric robots leads to difficulties in actuation inside viscous media due the increased surface drag on diminutive robot bodies. Herein, agile underwater swimming microrobots is presented with investigation correlation between magnetic propulsion and robot. The swim pivoting tumbling motions during rotation by in-plane two permanent magnets underneath plane, which results orbital revolution-type locomotion a maximum velocity 56 body lengths per second (BL s−1). rotational ability are determined correlated variables, i.e., liquid viscosity frequency magnet rotation, as elucidated experimental theoretical analysis. Based understanding maneuvers, achieve swimmability at similar that normal whole blood self-correcting maneuverability diverse vascular-like environments, including stenosed tube coarse granular hill rough-walled artificial vessel. Agile can improve versatile aquatic performances miniaturized vessels arteriosclerosis or clots.