EFFECT OF THE RUBBING FABRIC FOR SURFACE LIQUID-CRYSTAL ALIGNMENT ON VARIOUS ORIENTATION FILMS

Authors
SEO DS KOBAYASHI S NISHIKAWA M HAHN EJ YABE Y
Citation
Ds. Seo et al., EFFECT OF THE RUBBING FABRIC FOR SURFACE LIQUID-CRYSTAL ALIGNMENT ON VARIOUS ORIENTATION FILMS, Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 275, 1996, pp. 37-47
Citations number
31
Categorie Soggetti
Crystallography
Journal title
Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals → ACNP
ISSN journal
1058725X
Volume
275
Year of publication
1996
Pages
37 - 47
Database
ISI
SICI code
1058-725X(1996)275:<37:EOTRFF>2.0.ZU;2-L
Abstract
We have studied the effect of the rubbing fabric for pretilt angle gen eration, polar anchoring strength (energy), and the surface order para meter in nematic liquid crystals (NLC), 4-cyano-4'-n-penthylbiphenyl ( 5CB), on rubbed polyimide (PI) surfaces. The pretilt angle of 5CB for nylon and rayon fabric is larger than that of cotton fabric in weak ru bbing on rubbed PI surfaces. The polar anchoring energy and surface or der parameter of 5CB for nylon fabric are larger than those of cotton fabric on rubbed PI surfaces. We suggest that the polar anchoring ener gy and surface order parameter of 5CB increase with hard rubbing fabri c. Finally, we conclude that the polar anchoring energy of 5CB is stro ngly related to the surface order parameter on rubbed PI surfaces.