Abstract
Graphene oxide (GO)-doped indium gallium yttrium oxide (InGaYO) alignment layers formed by a brush-based solution-coating process are reported in this study. The doping concentrations were adjusted to 0, 5, and 15 wt%. The alignment layers obtained thus showed anisotropic micro/nanogroove structures having induced by shear stress originating from the brush-hair movements. This structure enabled uniform and homogeneous liquid crystal (LC) alignment on the film surface with geometric constraints. The alignment state was verified by polarized optical microscopy and pretilt angle analysis. The GO-doped InGaYO alignment layer demonstrated enhanced 1.92 × 10−4 Jm−2 polar anchoring energy of the LCs and reduced hysteresis property, which aid in lower image-sticking effects. The LC device operation was verified with 1.7 V in a twisted-nematic LC system along with stable optical transmittance control. From these results, GO doping of the metal-oxide alignment layer shows the potential for functional LC device applications.
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