A model of the unidirectional alignment accompanying the pretilt angle of a nematic liquid crystal (NLC), 5CB, oriented on rubbed organic-solvent-soluble polyimide film

M. Nishikawa, N. Bessho, T. Natsui, Y. Ohta, N. Yoshida, D. S. Seo, Y. Iimura, S. Kobayashi

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

We report a model of the unidirectional alignment accompanying the pretilt angle of a nematic liquid crystal (NLC), 5CB, oriented on rubbed organic-solvent-soluble polyimide (PI) film, which is useful for color active matrix liquid crystal displays. According to our computer calculation, the main chain of the PI molecule, which contains special moieties, forms a helicoidal structure. The model suggested in this paper for the NLC alignment claims that rubbing gives rise to the permanent stretching and deformation of the helicoidal structure that results in the NLC unidirectional alignment and pretilt angle, where the latter is attributed to the formation of asymmetric microscopic triangles.

Original languageEnglish
Pages (from-to)15-25
Number of pages11
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Volume275
DOIs
Publication statusPublished - 1996

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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