Temperature dependence of the polar anchoring strength of weakly rubbed polyimide films for the nematic liquid crystal (5CB)

Dai Shik Seo, Yasufumi Iimura, Shunsuke Kobayashi

Research output: Contribution to journalArticle

63 Citations (Scopus)


We have succeeded in measuring the polar anchoring energy of a nematic liquid crystal (5CB) aligned on rubbed polyimide films. The polar anchoring energy gradually weakens with increasing temperature and tends to zero as the nematic-isotropic (NI) transition temperature (35.3°C) is approached. This indicates a strong correlation between the polar anchoring energy and the surface order parameter. Under the weakest rubbing condition, a polar anchoring energy of 8×10-4 J/m2 is obtained at a cell temperature T=30°C. This result indicates that, even with the weakest rubbing strength, the anchoring strength of the rubbed polyimide films is stronger than that of other alignment films.

Original languageEnglish
Pages (from-to)234-236
Number of pages3
JournalApplied Physics Letters
Issue number2
Publication statusPublished - 1992 Dec 1


All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this