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Updated: Apr 21, 2026

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

Published on: May 15, 2017

Liquid crystal alignment induced by micron-scale patterned surfaces.

E Willman¹, L Seddon¹, M Osman¹

¹University College London, London WC1E 6BT, United Kingdom.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics

|October 30, 2014

Summary

This summary is machine-generated.

Researchers used simulations to show how patterned surfaces induce bulk orientation in nematic liquid crystals. Feature size and spacing control this alignment, leading to multistability for advanced display technologies.

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Area of Science:

Materials Science
Condensed Matter Physics
Computational Physics

Background:

Nematic liquid crystals (NLCs) exhibit unique optical properties crucial for display technologies.
Surface patterning is a key method for controlling NLC alignment.
Understanding bulk orientation induced by surface features is essential for device optimization.

Purpose of the Study:

To investigate induced bulk orientation of NLCs on micron-scale patterned surfaces.
To analyze the influence of feature size and spacing on NLC bulk alignment.
To estimate the effective anchoring strength and explore multistability.

Main Methods:

Utilized Landau-de Gennes theory for theoretical investigation.
Performed three-dimensional (3D) simulations of NLC behavior.
Employed a modified torque balance method to estimate anchoring strength.

Main Results:

Demonstrated that micron-scale surface patterns (wells and posts) induce bulk orientation in NLCs.
Showed that feature size and spacing significantly influence alignment far from the surface.
Identified unique ranges of feature sizes exhibiting both azimuthal and zenithal multistability.

Conclusions:

Surface topography at the micron scale can dictate macroscopic NLC bulk orientation.
The study provides insights into controlling NLC alignment for potential applications in advanced optical devices.
Discovered conditions for achieving azimuthal and zenithal multistability, enabling novel functionalities.