Powerful, multifunctional torsional micromuscles activated by phase transition.
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.
Kai
K
Liu
Chun
C
Cheng
Joonki
J
Suh
Robert
R
Tang-Kong
Deyi
D
Fu
Sangwook
S
Lee
Jian
J
Zhou
Leon O
LO
Chua
Junqiao
J
Wu