Molecular Crystals and Liquid Crystals · 2006 · 18 citations · 22 references
Natural SciencesChemistryMaterials ScienceCrystal StructureMolecular PhysicsPhysical ChemistryCrystallographyIntermolecular ForcesLiquid Crystal MaterialsLiquid CrystalsOrder-disorder ThermodynamicsSelf-assemblyAnthraquinone-based MaterialsDye Aggregation StudiesElectric-field-induced ReorientationLiquid Crystal Electro-optic EffectLiquid Crystal Optical AnisotropyLiquid Crystal OrderingLiquid Crystal Self-assemblyNematic Liquid Crystals
We report experimental and theoretical arguments showing that the effect of strong enhancement of the light-induced director reorientation in a nematic liquid crystal doped with anthraquinone dye molecules (Jánossy effect) can be related to their aggregation. The torque on the director is due to dependence of the entropy of the aggregate subsystem on the electric field vector relative to the director.
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