Magnetomotility of Magnetic Microrobots in Viscous Solutions

초록

Magnetic soft robots have been significantly considered in biomedical robotics for untethered systems by external magnetic fields. However, swimming microrobots are affected by drag force in viscous solutions. Herein, we investigate effects of rotational frequency of magnetic fields and solution viscosity on orbital maneuver of magnetic soft microrobots. Hierarchical locomotion of rotation and resultant revolution of microrobots are prompted by perpetual rotation of two permanent magnets. Uniform rotating proficiency is determined according to critical value of rotational magnetic frequency and liquid viscosity, . Also, provided that magnetic force is equal with viscous force, hierarchical locomotion is caused by pivoting and tumbling motion of microrobots. Furthermore, we will discuss on swimming capability in viscous glycerol solution and capacity to cope with arteriosclerosis.