PAa04 軟X線吸収分光を用いた液晶配向用紫外線照射ポリイミド膜の研究

抄録

Polyimide films irradiated with linearly polarized UV light can align liquid crystals(LC) perpendicularly to its polarization direction. In this paper, we have adopted near edge X-ray absorption fine structure(NEXAFS) spectroscopy with high surface sensitivity to study their LC alignment mechanisms. Observed dichroic ratio on the O K-edge π^* peak, originated from a C=O bond, clearly showed a good correlation with LC alignment capability.