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Controlling Liquid Crystal Orientations for Programmable Anisotropic Transformations in Cellular Microstructures.

Shucong Li1, Gabriele Librandi2, Yuxing Yao1

  • 1Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, 02138, USA.

Advanced Materials (Deerfield Beach, Fla.)
|September 2, 2021
PubMed
Summary
This summary is machine-generated.

Researchers developed adaptive materials using liquid crystalline elastomers (LCEs) that decouple molecular and structural properties. This breakthrough enables novel symmetry breakings for advanced functionalities in mechanics, optics, and electronics.

Keywords:
cellular microstructuresliquid crystalline elastomerssymmetry breakings

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Area of Science:

  • Materials Science
  • Soft Matter Physics
  • Mechanics of Materials

Background:

  • Cellular structures are used for adaptive materials, but symmetry breaking and functionalities are limited.
  • Macroscopic geometry often aligns with molecular anisotropy, restricting design freedom.

Purpose of the Study:

  • To decouple molecular anisotropy from macroscopic structure in cellular materials.
  • To achieve novel director-determined symmetry breakings and functionalities.

Main Methods:

  • Fabrication of cellular microstructures from liquid crystalline elastomers (LCEs).
  • Programming liquid crystal (LC) mesogen orientation using a magnetic field.
  • Finite element analysis and experimental validation.

Main Results:

  • Independent programming of molecular and structural anisotropy.
  • Demonstration of unprecedented director-determined symmetry breakings.
  • Harnessing mechanical reconfigurations for switchable friction and light modulation.

Conclusions:

  • Decoupling material-level anisotropy from structural directionality opens new avenues.
  • Enables a new generation of smart and adaptive materials and devices.
  • Potential applications in tunable friction, optics, and guided object movement.