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Area of Science:

  • Materials Science
  • Robotics
  • Mechanical Engineering

Background:

  • Stimuli-responsive soft actuators are crucial for microrobotics, enabling small, adaptable devices.
  • Current soft microscale robots often lack complex 3D structures and sophisticated responsiveness.
  • Fabricating intricate 3D soft robots with tunable properties remains a significant challenge.

Purpose of the Study:

  • To explore kirigami-based techniques for fabricating complex 3D soft robotic structures.
  • To enable light-activated mechanical actuation in kirigami structures for robotic applications.
  • To demonstrate a novel approach for creating light-fuelled, 3D soft robots.

Main Methods:

  • Utilizing kirigami techniques to create 2D film actuators from liquid crystal networks.
  • Applying external stress fields to induce out-of-plane deformation and 2D-to-3D structural transformation.
  • Employing light illumination to trigger mechanical actuation and control robotic functions.

Main Results:

  • Demonstrated a kirigami rolling robot capable of light-controlled multigait motion and 2D steering.
  • The robot successfully navigated diverse routes and ascended a 6° ramp.
  • Validated kirigami as a facile method for realizing complex, flexible 3D structures with light-activated robotic functions.

Conclusions:

  • Kirigami-based techniques offer a promising route to complex 3D stimuli-responsive soft actuators.
  • Light-activated kirigami structures enable sophisticated control and locomotion for microrobots.
  • This work paves the way for advanced, adaptable, and precisely controlled soft robotic systems.