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Updated: Jun 24, 2025

Preparation of Liquid Crystal Networks for Macroscopic Oscillatory Motion Induced by Light
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Responsive Liquid Crystal Network Microstructures with Customized Shapes and Predetermined Morphing for Adaptive Soft

Ming Cheng1,2,3,4, Wenfeng Cai1,2,3, Zhenming Wang1,2,3

  • 1Department of Electronic and Electrical Engineering, Southern University of Science and Technology, Shenzhen 518055, China.

ACS Applied Materials & Interfaces
|June 11, 2024
PubMed
Summary

A new in-cell soft lithography (ICSL) technique enables the cost-effective fabrication of custom liquid crystal network (LCN) microstructures. This method allows for precise control over shape and alignment, leading to advanced adaptive optics.

Keywords:
liquid crystal networkmicrolens arraymicrostructurephotopolymerizationsoft lithographysoft optics

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Area of Science:

  • Materials Science
  • Soft Matter Physics
  • Microfabrication

Background:

  • Stimuli-responsive materials, especially liquid crystal networks (LCNs), are key for advanced applications.
  • Existing methods struggle with microscale LCN fabrication, large-area production, and precise 3D shape control.
  • Novel techniques are needed for facilely creating LCN microstructures with controlled shape and alignment for 3D-to-3D shape change.

Purpose of the Study:

  • To introduce a simple, cost-effective in-cell soft lithography (ICSL) technique for fabricating LCN microstructures.
  • To demonstrate precise control over both the overall shape and molecular alignment of LCN microstructures.
  • To enable 3D-to-3D shape changes in LCN-based devices.

Main Methods:

  • Developed a two-step ICSL technique involving photopolymerization-induced phase separation (PIPS) for template fabrication.
  • Utilized templating to reproduce LCN microstructures.
  • Employed surface anchoring for molecular alignment to control deformation modes.

Main Results:

  • Successfully fabricated custom LCN microstructures with predesigned morphing capabilities.
  • Created cylindrical and spherical microlens arrays (CMLAs and SMLAs) using the ICSL technique.
  • Demonstrated stimulus-driven, polarization-dependent focusing effects in the fabricated microlens arrays.

Conclusions:

  • The ICSL technique offers high customizability, large-area production, and cost-effectiveness for LCN microfabrication.
  • This method provides a new pathway for developing adaptive soft micro-optics and photonics.
  • The technique facilitates precise control over microscale structures and their stimulus-responsive behaviors.