Wetting of cholesteric liquid crystals.

Particle-stabilized defect gel in cholesteric liquid crystals

Dispersions of colloidal particles in cholesteric liquid crystals form an unusual solid by stabilizing a network of linear defects under tension in the ideal layered structure of the cholesteric. The large length scales of the cholesteric liquid crystals allowed direct observation of the network structure, and its properties were correlated with rheological measurements of elasticity. This syst...

Evolution of disclinations in cholesteric liquid crystals.

We studied the evolution of defect lines (oily streaks) in cholesteric liquid crystals. In contrast to nematic liquid crystals, there were no interactions between the defect lines in cholesteric liquid crystals. We observed experimentally that individual open defect segments shrank with time with a linear relation, and individual defect loops shrank with time with a square root relation. We als...

Nmr Studies of Molecules Dissolved in Cholesteric Liquid Crystals

The results obtained from NMR spectroscopy of molecules oriented in cholesteric liquid crystals are presented. The advantages, limitations and future prospects of using cholesteric materials as orienting media for NMR experiments have been discussed with emphasis on our own recent work.

Cholesteric to cholesteric phase transitions in liquid crystals

Electrohydrodynamic instability in cholesteric liquid crystals

We report electrohydrodynamic instability in a cholesteric liquid crystal—a mixture of p-methoxy benzylidene p-n-butylaniline (MBBA) and a cholesteric dopant cholesteryl nonanoate (CN), in the presence of a superimposed magnetic field H. We have found a certain intensity H with respect to the instability in this mixture with negative dielectric anisotropy, beyond which a stripe pattern appears....