LIQUID-CRYSTAL ALIGNMENT CONTROLLED BY LB FILMS

Copper phthalocyanine doped polymethacrylate Langmuir-Blodgett films w ere transferred to align a nematic liquid crystal 5CB, It is found tha t the pre-tilt angle of the liquid crystal can be controlled with the variation of the doped copper phthalocyanine molecular ratio and is co rrelated with the dichroic ratio of the aligning layer. The polarity o f the aligning layer is regarded as the most likely underlying factor that causes the different LC alignment configurations. (C) 1997 Elsevi er Science B.V.