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Free-form Light Actuators &#8212; Fabrication and Control of Actuation in Microscopic Scale
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Lattice-contraction triggered synchronous electrochromic actuator.

Kerui Li1, Yuanlong Shao2, Hongping Yan3

  • 1State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, People's Republic of China.

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|November 17, 2018
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Summary
This summary is machine-generated.

Researchers developed a dual-responsive material using W18O49 nanowires for synchronized color change and actuation. This innovation offers a controllable and efficient solution for advanced camouflage and AI applications.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Electrochemistry

Background:

  • Synchronous color change and actuation are crucial for biomimetic camouflage and AI.
  • Existing dual-responsive devices struggle with stimulus control and coordination.

Purpose of the Study:

  • To develop a flexible composite film with synchronized electrochromic and actuating properties.
  • To elucidate the mechanism behind the dual-responsive phenomena.

Main Methods:

  • Utilized W18O49 nanowires as the single active component.
  • Employed in situ synchrotron X-ray diffraction, first principles calculations, and numerical simulations.
  • Conducted control experiments to validate findings.

Main Results:

  • Achieved a flexible composite film with electrochromic/actuating dual-responsiveness (238° bending angle).
  • Demonstrated excellent reversibility, high synchronization, and fast response speed (< 5 s).
  • Elucidated the actuation mechanism as pseudocapacitance-based reversible lattice contraction/recovery of W18O49 nanowires.

Conclusions:

  • W18O49 nanowires enable controllable, synchronized dual-responsive materials.
  • The pseudocapacitance-based mechanism offers a novel approach for actuation.
  • Developed a stable, air-operable solid-state ionic polymer-metal composite actuator.