  Liquid crystals alignment on 2D materials is known due to their intrinsic van
der Waals interaction. Here, we demonstrate that direction of electric field
can tune the alignment of liquid crystal adsorbed on 2D surface. Due to
degeneracy of alignment liquid crystal on hexagonal surface, it prefers to
align in three multiple states. We utilized this concept and control the
alignment of grains of chemical vapor deposition grown boron nitride (h-BN) to
control the incident light. It was demonstrated that electric field can
reorient the direction of liquid crystal alignment on Zigzag and armchair edges
of h-BN. The ab initio calculations confirmed the favorable adsorption
configurations of liquid crystal molecule on hexagonal boron nitride surface.
This concept provides a pathway towards dynamic high-quality pixels with low
power consumption and could define a new avenue in near-eye displays.
