Liquid Crystals 2

Nematic Phases: have no positional order at all, but have same directions along the director Anisotropic LCS (with large alignment) Chiral nematic: Rotates plane-polarized light (cholesteric =chiral nematic LC) Smectic: has more positional ordering than Nematic Here mesogens move within same plane but not between planes. Here three Smectics: Smectic A: Director is perpendicular to plane Where mesogens move in same plane Smectic B: Director is perpendicular to plane, and mesogens form hexagons in the layer Smectic C: Like in Smectic A but have an angle not equal to 90 (titled orientation)