Abstract
The characteristics of ion beam (IB)-irradiated polyurethane (PU) alignment layer fabricated for use as liquid crystal (LC) alignment layer were investigated. Even at a low IB intensity of 600 eV, uniform LC alignment was achieved. The LC alignment on the IB-irradiated PU surface was attributed to surface polarities compared to C-C bonds in the PU substrate; hence, the van der Waals interactions between LC molecules and the PU surface were increased, thereby maintaining a good balance for homogeneous alignment. The LC cells based on PU irradiated with low intensity IB show potential for application as an alternative alignment layer in new LCD products.
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