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Bioinspired Microhinged Actuators for Active Mechanism-Based Metamaterials.

Zi-Yi Cao1, Huayang Sai1, Weiwei Wang1

  • 1Department of Advanced Manufacturing and Robotics, State Key Laboratory for Turbulence and Complex Systems, BIC-ESAT, College of Engineering, Peking University, Beijing, 100871, China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|November 18, 2024
PubMed
Summary
This summary is machine-generated.

Researchers developed a biomimetic microhinged actuator inspired by insect flight. This innovation enables programmable shape morphing in metamaterials for advanced micro-robotics.

Keywords:
bioinspired microhingecompliant mechanismmechanism‐based metamaterialsshape‐morphingtwo‐photon direct laser writing

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Area of Science:

  • * Materials Science
  • * Robotics
  • * Biomimetics

Background:

  • * Mechanism-based metamaterials offer potential for intelligent micromachines.
  • * Limited microactuator technology restricts programmable motility and shape-morphing capabilities.
  • * Bioinspiration from insect flight mechanisms provides a novel design paradigm.

Purpose of the Study:

  • * To develop a biomimetic microhinged actuator integrating compliant mechanisms and soft hydrogel muscle.
  • * To enable multimodal locomotion and active shape-morphing behaviors in micro- and nanoscale devices.
  • * To demonstrate programmable shape morphing in 2D and 3D metamaterials.

Main Methods:

  • * Development of a hydrogel-based microhinged actuator inspired by insect flight.
  • * Utilizing a Pseudo-Rigid-Body mechanical model for structural deformation analysis.
  • * Fabrication via multi-step four-dimensional (4D) direct laser writing.
  • * Integration of actuators into 2D and 3D metamaterials and micro-kirigami.

Main Results:

  • * The hydrogel microactuator exhibits significant folding with high structural stiffness.
  • * Multiple actuators enable multi-degree-of-freedom folding in arbitrary directions.
  • * Fabricated metamaterials demonstrate programmable shape morphing.
  • * Actuated micro-kirigami with photonic structures show pattern transformation.

Conclusions:

  • * The bioinspired microhinged actuator overcomes limitations in microactuation for metamaterials.
  • * This approach facilitates intricate shape-morphing behaviors and programmable locomotion.
  • * Opens new avenues for developing active mechanism-based metamaterials for micro-robotics.