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Updated: May 6, 2026

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
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3D Directional Assembly of Liquid Crystal Molecules.

Zexu Zhang1, Chunsan Deng1, Xuhao Fan1

  • 1Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, China.

Advanced Materials (Deerfield Beach, Fla.)
|May 25, 2024
PubMed
Summary

Researchers developed a 3D directional molecular assembly strategy using femtosecond laser direct writing (FsLDW). This method precisely arranges molecules, like liquid crystals, for advanced functional devices.

Keywords:
3D directional assemblyfemtosecond laser direct writingfresnel zone plateliquid crystaltwo‐photon polymerization

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Optics

Background:

  • Harnessing molecular anisotropy for hierarchical structures is key but challenging.
  • Achieving 3D, high-precision, single-step molecular assembly remains a significant hurdle.

Purpose of the Study:

  • To propose and demonstrate a 3D directional molecular assembly strategy using femtosecond laser direct writing (FsLDW).
  • To investigate the mechanism of laser-induced molecular assembly and achieve precise 3D arbitrary arrangement.
  • To showcase the method's potential by fabricating functional liquid crystal (LC) devices.

Main Methods:

  • Utilizing femtosecond laser direct writing (FsLDW) for precise 3D molecular assembly.
  • Investigating the physical mechanism of femtosecond (fs) laser-induced assembly of liquid crystal (LC) molecules.
  • Defining discretized laser scanning pathways for controlled molecular arrangement.

Main Results:

  • Demonstrated precise 3D arbitrary assembly of LC molecules.
  • Fabricated an LC-based Fresnel zone plate array with polarization selection and colorization imaging.
  • Validated the FsLDW strategy for high-resolution alignment of LC-based functional devices.

Conclusions:

  • Introduced a novel 3D high-resolution alignment method for LC functional devices.
  • Established a universal protocol for precise 3D directional assembly of anisotropic molecules.
  • FsLDW offers a powerful tool for advanced molecular assembly and device fabrication.