Orientations of phenyl sidegroups and liquid crystal molecules on a rubbed polystyrene surface

Masahito Oh-E, Seok Cheol Hong, Y. R. Shen

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

Surface-specific sum-frequency vibrational spectroscopy and second-harmonic generation have been used to study the structure of a rubbed polystyrene (PS) surface and the orientation of 4-n-pentyl-4-cyanobiphenyl (5CB) liquid crystal molecules on it. The results show that the phenyl sidegroups are well aligned by rubbing in the direction perpendicular to rubbing but tilt from the surface normal with a broad distribution. Although the PS surface is nonpolar, the 5CB molecules appear to adsorb on PS preferentially with the terminal cyano group facing the PS surface.

Original languageEnglish
Pages (from-to)784-786
Number of pages3
JournalApplied Physics Letters
Volume80
Issue number5
DOIs
Publication statusPublished - 2002 Feb 4

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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