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Stepwise Artificial Yarn Muscles with Energy- Free Catch States Driven by Aluminum-Ion Insertion

Ren, Ming; Xu, Panpan; Zhou, Yurong; Wang, Yulian; Dong, Lizhong; Zhou, Tao; Chang, Jinke; ... Li, Qingwen; + view all (2022) Stepwise Artificial Yarn Muscles with Energy- Free Catch States Driven by Aluminum-Ion Insertion. ACS Nano , 16 (10) pp. 15850-15861. 10.1021/acsnano.2c05586. Green open access

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Abstract

Present artificial muscles have been suffering from poor actuation step precision and the need of energy input to maintain actuated states due to weak interactions between guest and host materials or the unstable structural changes. Herein, these challenges are addressed by deploying a mechanism of reversible faradaic insertion and extraction reactions between tetrachloroaluminate ions and collapsed carbon nanotubes. This mechanism allows tetrachloroaluminate ions as a strong but dynamic "locker"to achieve an energy-free high-Tension catch state and programmable stepwise actuation in the yarn muscle. When powered off, the muscle nearly 100% maintained any achieved contractile strokes even under loads up to 96,000 times the muscle weight. The actuation mechanism allowed the programmable control of stroke steps down to 1% during reversible actuation. The isometric stress generated by the yarn muscle (14.6 MPa in maximum, 40 times that of skeletal muscles) was also energy freely lockable and step controllable with high precision. Importantly, when fully charged, the muscle stored energy with a high capacity of 102 mAh g-1, allowing the muscle as a battery to power secondary muscles or other devices.

Type: Article
Title: Stepwise Artificial Yarn Muscles with Energy- Free Catch States Driven by Aluminum-Ion Insertion
Location: United States
Open access status: An open access version is available from UCL Discovery
DOI: 10.1021/acsnano.2c05586
Publisher version: https://doi.org/10.1021/acsnano.2c05586
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Science & Technology, Physical Sciences, Technology, Chemistry, Multidisciplinary, Chemistry, Physical, Nanoscience & Nanotechnology, Materials Science, Multidisciplinary, Chemistry, Science & Technology - Other Topics, Materials Science, actuators, carbon nanotube yarn, aluminum ion battery, energy storage, catch state, CARBON NANOTUBES, ACTUATORS, FIBERS
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Surgery and Interventional Sci
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Surgery and Interventional Sci > Department of Surgical Biotechnology
URI: https://discovery.ucl.ac.uk/id/eprint/10159903
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