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yexuqing木虫之王 (文学泰斗)
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Powered Torsional and Tensile Actuation of Hybrid Carbon Nanotube Yarn Muscles
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lectrically, Chemically, and Photonically Powered Torsional and Tensile Actuation of Hybrid Carbon Nanotube Yarn Muscles Márcio D. Lima1,*, Na Li1,2,*, M渀椀挀愀 Jung de Andrade1, Shaoli Fang1, Jiyoung Oh1, Geoffrey M. Spinks3, Mikhail E. Kozlov1, Carter S. Haines1, Dongseok Suh1, Javad Foroughi3, Seon Jeong Kim4, Yongsheng Chen2, Taylor Ware1, Min Kyoon Shin4, Leonardo D. Machado5, Alexandre F. Fonseca6, John D. W. Madden7, Walter E. Voit1, Douglas S. Galv?N5, Ray H. Baughman1, + Author Affiliations 1The Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas, Richardson, TX 75083, USA. 2Centre of Nanoscale Science and Technology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China. 3Intelligent Polymer Research Institute, Australian Research Council Centre of Excellence for Electromaterials Science, University of Wollongong, Wollongong, NSW 2522, Australia. 4Center for Bio-Artificial Muscle and Department of Biomedical Engineering, Hanyang University, Seoul 133-791, South Korea. 5Applied Physics Department, State University of Campinas, Campinas, SP, 13081-970, Brazil. 6Faculdade de Ciências, Universidade Estadual Paulista, Bauru, SP, 17033-360, Brazil. 7Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, BC V6T 1Z4, Canada. 吠?N whom correspondence should be addressed: E-mail: ray.baughman@utdallas.edu * These authors contributed equally to this work. ABSTRACT Artificial muscles are of practical interest, but few types have been commercially exploited. Typical problems include slow response, low strain and force generation, short cycle life, use of electrolytes, and low energy efficiency. We have designed guest-filled, twist-spun carbon nanotube yarns as electrolyte-free muscles that provide fast, high-force, large-stroke torsional and tensile actuation. More than a million torsional and tensile actuation cycles are demonstrated, wherein a muscle spins a rotor at an average 11,500 revolutions/minute or delivers 3% tensile contraction at 1200 cycles/minute. Electrical, chemical, or photonic excitation of hybrid yarns changes guest dimensions and generates torsional rotation and contraction of the yarn host. Demonstrations include torsional motors, contractile muscles, and sensors that capture the energy of the sensing process to mechanically actuate. Received for publication 2 July 2012. Accepted for publication 13 September 2012. Read the Full Text |
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