1D05 垂直配向ポリイミド膜の表面構造 : A Sum-Frequency Vibrational Spectroscopic Study(2004年日本液晶学会討論会)

概要

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Nonlinear optical spectroscopic techniques were used to study the structures of polyimide (PI) surfaces for homeotropic liquid crystal (LC) alignment and the molecular orientation of LC adsobates on these surfaces. The imide ring was perpendicular to the surface with one of CO bonds protruding out of the surface and the other pointing into the bulk rather than flat on the surface. The ester CO bond in the side chain was sticking out of the surface with a tilt angle of about 40-55 degrees from the surface normal, indicating that the rigid side chain core was, more or less, along the surface normal. The cyano biphenyl LC molecules were adsorbed on the PI preferentially with the terminal cyano group facing the PI surface.
日本液晶学会の論文
2004-09-26