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Area of Science:

  • Materials Science
  • Non-equilibrium Physics
  • Soft Matter

Background:

  • Light-responsive materials, such as liquid crystal networks (LCNs), can exhibit self-oscillation in non-equilibrium states.
  • Traditional self-oscillating systems often rely on self-shadowing mechanisms, which are limited when shadowing is constrained.

Purpose of the Study:

  • To demonstrate a novel method for achieving sustained oscillations in light-responsive materials by applying external mechanical forces.
  • To overcome the limitations of conventional self-shadowing mechanisms in constrained environments.

Main Methods:

  • Utilizing a vertically suspended, light-responsive LCN strip under constant irradiation.
  • Applying external mechanical loads to induce a transition from static deformation to continuous oscillation.

Main Results:

  • Sustained oscillations were achieved without complete shadowing by applying external mechanical forces.
  • Oscillation amplitude demonstrated a direct correlation with light intensity, reaching up to 300° angular displacement.
  • Oscillation frequency showed an inverse relationship with applied load, indicating mechanical sensitivity.

Conclusions:

  • External mechanical forces can effectively induce and control self-oscillation in light-responsive materials, broadening their applicability.
  • The demonstrated force-assisted self-oscillation principle is versatile and applicable to various deformation modes and LCN configurations.
  • This approach offers a simplified design for adaptive non-equilibrium matter, mimicking biological mechanosensation.