A Novel Electromechanical Actuation Mechanism of a Carbon Nanotube Fiber

Authors

  • Wenhan Guo,

    1. State Key Laboratory of Molecular, Engineering of Polymers, Department of Macromolecular Science and Laboratory of Advanced Materials, Fudan University, Shanghai 200438, P. R. China
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  • Chao Liu,

    1. State Key Laboratory of Molecular, Engineering of Polymers, Department of Macromolecular Science and Laboratory of Advanced Materials, Fudan University, Shanghai 200438, P. R. China
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  • Fangyuan Zhao,

    1. Department of Materials Science and Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Fudan University, Shanghai 200438, P. R. China
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  • Xuemei Sun,

    1. State Key Laboratory of Molecular, Engineering of Polymers, Department of Macromolecular Science and Laboratory of Advanced Materials, Fudan University, Shanghai 200438, P. R. China
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  • Zhibin Yang,

    1. State Key Laboratory of Molecular, Engineering of Polymers, Department of Macromolecular Science and Laboratory of Advanced Materials, Fudan University, Shanghai 200438, P. R. China
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  • Tao Chen,

    1. State Key Laboratory of Molecular, Engineering of Polymers, Department of Macromolecular Science and Laboratory of Advanced Materials, Fudan University, Shanghai 200438, P. R. China
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  • Xuli Chen,

    1. State Key Laboratory of Molecular, Engineering of Polymers, Department of Macromolecular Science and Laboratory of Advanced Materials, Fudan University, Shanghai 200438, P. R. China
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  • Longbin Qiu,

    1. State Key Laboratory of Molecular, Engineering of Polymers, Department of Macromolecular Science and Laboratory of Advanced Materials, Fudan University, Shanghai 200438, P. R. China
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  • Xinhua Hu,

    1. Department of Materials Science and Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Fudan University, Shanghai 200438, P. R. China
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  • Huisheng Peng

    Corresponding author
    1. State Key Laboratory of Molecular, Engineering of Polymers, Department of Macromolecular Science and Laboratory of Advanced Materials, Fudan University, Shanghai 200438, P. R. China
    • State Key Laboratory of Molecular, Engineering of Polymers, Department of Macromolecular Science and Laboratory of Advanced Materials, Fudan University, Shanghai 200438, P. R. China.

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Abstract

original image

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.

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