Photoinduced surface alignment: The role of liquid-crystalline order

I. Jánossy, A. Vajda, T. Paksi, T. Kósa

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The optical control of surface alignment was investigated, using azo-dye doped polyimide films as photosensitive material. The kinetics of the realignment of the easy axis was measured in isotropic, nematic and smectic A phases. It is demonstrated that the light-induced realignment of the dye molecules at the polymer-liquid crystal interface is strongly influenced by the presence of the liquid-crystalline order. A simple model is presented, which accounts qualitatively for the experimental observations.

Original languageEnglish
Pages (from-to)157-166
Number of pages10
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Volume359
Publication statusPublished - 2001

Fingerprint

Azo Compounds
Azo dyes
Liquid crystal polymers
Polyimides
Coloring Agents
Dyes
dyes
alignment
Crystalline materials
optical control
Molecules
Kinetics
Liquids
liquids
polyimides
liquid crystals
kinetics
polymers
molecules
liquid crystal polymer

Keywords

  • Dye-doped polymers
  • Photoalignment

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

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AU - Paksi, T.

AU - Kósa, T.

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KW - Dye-doped polymers

KW - Photoalignment

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