Frequency-dependent deformation of liquid crystal droplets in an external electric field

摘要: Nematic droplets suspended in the isotropic phase of same substance were subjected to alternating electrical fields varying frequency. To keep system at a constant nematic/isotropic volume ratio with droplet size, we carefully kept temperature isotropic/nematic coexistence region, which was broadened by adding small amounts non-mesogenic liquid. Whereas nematic remained spherical low (in order 10 Hz) and high frequencies 1 kHz), intermediate observed marked flattening plane perpendicular applied field. Droplet deformation occurred both liquid crystals (LCs) positive negative dielectric anisotropy. The experimental data can be quantitatively modelled combination leaky model screening electric field due finite conductivity.