A Novel Electromechanical Actuation Mechanism of a Carbon Nanotube Fiber (pages 5379–5384)
Wenhan Guo, Chao Liu, Fangyuan Zhao, Xuemei Sun, Zhibin Yang, Tao Chen, Xuli Chen, Longbin Qiu, Xinhua Hu and Huisheng Peng
Article first published online: 31 JUL 2012 | DOI: 10.1002/adma.201201845
A spun carbon nanotube fiber functions as a torsional actuator in almost all available environmental media such as air, water, organic solvents, and electrolyte solutions. The Ampere's Law among helically aligned carbon nanotubes explains the simultaneous occurrence of lengthwise contraction and rotary torsion upon applying a low current. The produced stress is over 100 times that of the strongest natural skeletal muscle with high reversibility and good stability. The use of torsional fibers for electric motors is demonstrated.