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ABSTRACT This paper presents a GHz phase shifter that can be controlled electrically, utilising liquid crystals doped with graphene quantum dots (GQDs). These materials have received comparatively less attention than ferroelectric or ferromagnetic nanoparticles. The study explores the Fredericks transition and analyzes the effects of various parameters on phase shifts, including impurity dopants and applied voltage.
Abstract The present study investigates the arrangement of hollow pyramidal cone shells and their interactions with degenerate planar anchoring on the inner and outer surfaces of particles within the nematic host. The shell thickness is in order of the nematic coherence length. The numerical behavior of colloids is determined by minimizing the Landau-de Gennes free energy in the presence of the Fournier surface energy and using the finite element method.
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