Generation of the pretilt angles in nematic liquid crystal (5CB) aligned on the rubbed polypyrrole films

Abstract

We have investigated the pretilt angles generated in the nematic liquid crystal 5CB media, aligned on polypyrrole (PP) films through rubbing. It is shown that the PP films may be synthesized with two kinds of counter ionic atomic groups, i.e., rheonium oxide (ReO−4) which can generate about 5° pretilt angles and bromide (Br−) where no pretilt angle is observed.