Abstract
The flexible actuator has attracted significant interest for its ability to respond flexibly to external stimuli, especially for renewable natural energy sources. However, the flexible actuator faces issues such as inadequate sensitivity and inability to achieve synergistic responses. Therefore, we prepared a highly sensitive flexible actuator by mixing liquid metal (LM) with poly(vinylpyrrolidone) (PVP), graphene oxide (GO), and coating the resulting mixtures onto poly(ethylene terephthalate) (PET) substrate materials using the rod coating process. The flexible actuator responds quickly to near-infrared light and humidity and can be rapidly transformed from flat to curved with a maximum angular change of 540°. By demonstrating the flexible actuator in action, it can be used to create a crawling robot that mimics the movement of an inchworm on a leaf, as well as a gripper capable of lifting objects 5 times its weight, and a crawling robot that moves forward, turns left, and then right. Flexible actuators hold significant promise for applications in emerging fields such as advanced bionics and artificial intelligence.
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