Kavli Affiliate: Zhigang Suo
| First 5 Authors: Yukun Xia, Jikun Wang, Ruisen Yang, Tongqing Lu, Tiejun Wang
| Summary:
Magnetic elastomers deform under a magnetic field, working as a soft
actuator. Untethered microbot made of magnetic elastomers have great potentials
in performing medical tasks inside human body as mini doctors. However, the
lack of a highly deformable and efficient actuator strongly limits the
development of magnetic microbots. In this paper, we developed an actuator of
magnetic elastomer capable of large deformation strain by harnessing magnetic
pull-in instability. We design three prototypes of untethered microbots by
using this actuator: a robot grips objects with a large rotating angle, a robot
navigates in a fluid channel and delivers drug, and a robot self-accelerates
and quickly jumps up. The pull-in mechanism enables a new type of soft robot
with fast response, remote wireless control and extremely high power density.
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