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Powerful, Multifunctional Torsional Micromuscles Activated by Phase Transition

2013; Volume: 26; Issue: 11 Linguagem: Inglês

10.1002/adma.201304064

1521-4095

Kai Liu, Chun Cheng, Joonki Suh, Robert Tang‐Kong, Deyi Fu, Sangwook Lee, Jian Zhou, Leon O. Chua, Junqiao Wu,

Advanced Materials and Mechanics

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.