Multiple Polar and Non‐polar Nematic Phases
Stevie Brown, Ewan Cruickshank, John M. D. Storey, Corrie T. Imrie, Damian Pociecha, Magdalena Majewska, Anna Makal, Ewa Górecka
Abstract
Liquid-crystal materials exhibiting up to three nematic phases are reported. Dielectric response measurements show that while the lower temperature nematic phase has ferroelectric order and the highest temperature nematic phase is apolar, the intermediate phase has local antiferroelectric order. The modification of the molecular structure by increasing the number of lateral fluorine substituents leads to one of the materials showing a direct isotropic-ferronematic phase transition.
Topics & Concepts
Liquid crystalPolarFerroelectricityAntiferroelectricityPhase (matter)IsotropyMaterials sciencePhase transitionDielectricBiaxial nematicChemical physicsCondensed matter physicsChemistryOpticsOrganic chemistryPhysicsOptoelectronicsAstronomyLiquid Crystal Research AdvancementsAdvanced Materials and MechanicsPhotonic Crystals and Applications