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We developed a model for director gliding in liquid crystals, explaining slow reorientation of the easy axis on polymer-coated substrates. The model accurately predicts experimental data for zenithal and azimuthal gliding dynamics.

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Soft Matter Physics

Background:

  • Nematic liquid crystals exhibit director gliding, a slow reorientation of the easy axis on polymer-coated substrates under prolonged external fields.
  • Previous studies by Joly et al. and Buluy et al. observed zenithal gliding, while Faetti and Marianelli documented azimuthal gliding.

Purpose of the Study:

  • To present a simple, physically motivated model for director gliding dynamics.
  • To capture the slow reorientation of the easy axis in nematic liquid crystals on coated substrates.
  • To explain gliding behavior both during and after the application of an electric field.

Main Methods:

  • Development of a physically motivated model for director gliding.
  • Quantitative comparison of model predictions with existing experimental data for zenithal and azimuthal gliding.
  • Analysis of gliding dynamics in the presence and absence of an external electric field.

Main Results:

  • The proposed model successfully captures the slow dynamics of director gliding.
  • Model results show excellent agreement with experimental observations of zenithal and azimuthal gliding.
  • The model explains the evolution of gliding phenomena effectively.

Conclusions:

  • The developed model provides a robust explanation for director gliding in nematic liquid crystals.
  • The model's quantitative accuracy validates its physical basis and predictive power.
  • This work advances the understanding of liquid crystal-substrate interactions and their dynamic behavior.