Abstract

The vertical alignment of reactive mesogen molecules was induced on an oxygen plasma-treated glass surface without using a liquid crystal (LC) alignment layer. Optical retardation of the vertically aligned LC cell resulted in a critical limit that depends on the thickness of liquid crystals. However, the vertical alignment in the LC cell could not be maintained after UV curing if its thickness was greater than 5 μm or if the curing temperature was within the LC phase temperature. In this study, very thin films with vertical LC orientation were obtained by curing reactive mesogen in the supercooled nematic phase below the equilibrium melting temperature.

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