Kai Liu, Chun Cheng, Joonki Suh, Robert Tang-Kong, Deyi Fu, Sangwook Lee, Jian Zhou, Leon O. Chua and Junqiao Wu Powerful, Multifunctional Torsional Micromuscles Activated by Phase Transition Advanced Materials 26
Micro bimorph coils driven by a metalinsulator phase transition in VO2 function as powerful torsional muscles. Reversible torsional motion over one million cycles without degradation is demonstrated, with a superior rotational speed up to ca. 200 000 rpm, an amplitude of 500° per mm length, and a power density up to ca. 39 kW kg−1.
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