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Planar and Homeotropic Liquid Crystal Alignment on 3D-Nanoprinted Layers and Microstructures.

Monika Halendy1, Sławomir Ertman1

  • 1Warsaw University of Technology, Faculty of Physics, Koszykowa 75, Warsaw 00-662, Poland.

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PubMed
Summary

This study explores using 3D nanoprinting for liquid crystal (LC) alignment, combining surface topography, chemistry, and 3D geometry. This enables precise control over LC orientation in complex microstructures for advanced applications.

Keywords:
3D nanoprintingdirect laser writingliquid crystal alignmentliquid crystalsthree-dimensional microstructurestwo-photon polymerization

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Liquid Crystal Displays

Background:

  • Precise liquid crystal (LC) alignment is crucial for LC applications.
  • Traditional alignment methods use surface topography or chemical interactions, often limited to flat surfaces.
  • Two-photon polymerization (2PP)-based direct laser writing (DLW) offers nanoscale precision but is underexplored for 3D LC alignment.

Purpose of the Study:

  • To investigate 2PP-based DLW for engineering LC alignment using combined surface topography, material chemistry, and 3D geometry.
  • To demonstrate advanced LC alignment capabilities beyond flat surfaces.
  • To explore novel 3D microstructures for tailored LC orientation.

Main Methods:

  • Utilized 2PP-based DLW for fabricating microstructures with controlled surface topography and chemical properties.
  • Integrated topographical and chemical alignment mechanisms on a single substrate.
  • Fabricated 3D microstructures including prisms, capillaries, and fully printed cells with integrated spacers.

Main Results:

  • Achieved patterned planar-homeotropic alignment on a single substrate.
  • Demonstrated controlled twisted nematic configurations in 3D-printed cells without post-assembly alignment.
  • Successfully functionalized 3D nanoprinted microstructures with chemical alignment agents.

Conclusions:

  • 2PP-based DLW is a versatile platform for advanced LC alignment.
  • This approach enables the fabrication of complex 3D microstructures with tailored LC orientation.
  • Potential for developing functional microstructures that act as alignment components for future LC devices.