期刊
SCIENCE ADVANCES
卷 8, 期 46, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.abq7703
关键词
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资金
- National Key Research and Development Program of China [2020YFB1312902]
- National Natural Science Foundation of China [21975281]
This study reports an artificial neuromuscular fiber that integrates sensing and actuation capabilities, similar to a snail tentacle. By using a combination of carbon nanotube fiber core, elastomer layer, nanofiber network, and MXene/CNT thin sheath, this intelligent fiber achieves sensitive touch/stretch perception and hysteresis-free cyclic actuation tracing.
Integrating sense in a thin artificial muscle fiber for environmental adaption and actuation path tracing, as a snail tentacle does, is highly needed but still challenging because of the interfacing mismatch between the fiber's actuation and sensing components. Here, we report an artificial neuromuscular fiber by wrapping a carbon nanotube (CNT) fiber core in sequence with an elastomer layer, a nanofiber network, and an MXene/CNT thin sheath, achieving the ingenious sense-judge-act intelligent system in an elastic fiber. The CNT/elastomer components provide actuation, and the sheath enables touch/stretch perception and hysteresis-free cyclic actuation tracing due to its strain-dependent resistance. As a whole, the coaxial structure builds a dielectric capacitor that enables sensitive touchless perception. The key to seamless integration is to use a nanofiber interface that allows the sensing layer to adaptively trace but not restrict actuation. This work provides promising solutions for closed-loop control for future intelligent soft robots.
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