Scalable multi-dimensional topological deformation actuators for active object identification

Rarely are bionic robots capable of rapid multi-dimensional deformation and object identification in the same way as animals and plants. This study proposes a topological deformation actuator for bionic robots based on pre-expanded polyethylene and large flake MXene, inspired by the octopus predation behavior. This unusual, large-area topological deformation actuator (easily reaching 800 cm(2) but is not constrained to this size) prepared by large-scale blow molding and continuous scrape coating exhibits different distribution states of molecular chains at low and high temperatures, causing the actuator's deformation direction to change axially. With its multi-dimensional topological deformation and self-powered active object identification capabilities, the actuator can capture objects like an octopus. The contact electrification effect assists the actuator to identify the type and size of the target object during this multi-dimensional topological deformation that is controllable and designable. This work demonstrates the direct conversion of light energy into contact electrical signals, introducing a new route for the practicality and scaling of bionic robots.

Automated summary

Rarely are bionic robots able to deform rapidly in multiple dimensions and identify objects like animals and plants. This study introduces a topological deformation actuator for bionic robots, inspired by octopus predation behavior, using pre-expanded polyethylene and large flake MXene. The actuator exhibits different molecular chain distributions at different temperatures, allowing for axial changes in deformation direction. With its multi-dimensional deformation and self-powered object identification capabilities, the actuator can capture objects like an octopus. The contact electrification effect assists in identifying the type and size of the target object during the controllable and designable deformation process. This work presents a new approach for practical and scalable bionic robots by directly converting light energy into contact electrical signals.