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Rapidly deployable and morphable 3D mesostructures with applications in multimodal biomedical devices.

Fan Zhang1,2, Shupeng Li3,4,5, Zhangming Shen1,2

  • 1Key Laboratory of Applied Mechanics of Ministry of Education, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China.

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|April 10, 2021
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Summary

Researchers developed millimeter-scale, shape-changing structures using electromagnetic actuation. These deployable and morphable inorganic structures enable advanced applications in sensing and surgery.

Keywords:
Lorentz forcedeployable and morphable 3D mesostructuresinstabilitymagnetic forcemechanically guided assembly

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Biomedical Engineering

Background:

  • Miniaturized, shape-changing structures are crucial for high-resolution and minimally invasive applications.
  • Current challenges exist in creating high-performance inorganic deployable structures at the millimeter scale.

Purpose of the Study:

  • To develop strategies for creating millimeter-scale, deployable, and morphable inorganic structures.
  • To overcome limitations in integrating actuation mechanisms at small scales.

Main Methods:

  • Utilized mechanics-guided 3D assembly for integrating metallic or magnetic films.
  • Employed electromagnetic actuation (Lorentz or magnetic forces) under an external magnetic field.
  • Applied quantitative modeling and scaling laws for design and fabrication.

Main Results:

  • Successfully created low-rigidity 3D architectures with significant, reversible, and rapid deformation via electromagnetic actuation.
  • Achieved reconfigurable mesostructures with multiple stable states, maintaining configuration after field removal.
  • Demonstrated a functional device for simultaneous thermal conductivity measurements in bilayer films.

Conclusions:

  • The proposed electromagnetic actuation and 3D assembly strategy enables high-performance, millimeter-scale morphable structures.
  • This approach holds significant potential for multimodal sensing in biomedical applications.
  • The developed methods facilitate the creation of complex, reconfigurable structures for advanced technological applications.