The monolayer films of a double-armed crown ether liquid crystal have been prepared under low and high surface pressures, which can produce homogeneous and homeotropic alignments of liquid crystals, respectively. The anchoring transition has been interpreted as the result of a conformation change of the aligning agents. This is the first clear experimental demonstration that a conformation change of aligning molecules can induce an anchoring transition of liquid crystals.
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Zhu et al. (1994) studied this question.
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