Physical Review Letters
wall interface, director, film
The surface alignment of lyotropic chromonic liquid crystals can not only be planar (tangential) but also homeotropic, with self-assembled aggregates perpendicular to the substrate, as demonstrated by mapping optical retardation and by three-dimensional imaging of the director field. With time, the homeotropic nematic undergoes a transition into a tangential state. The anchoring transition is discontinuous and can be described by a double-well anchoring potential with two minima corresponding to tangential and homeotropic orientation.
Nazarenko, V. G.; Boiko, O. P.; Park, H. S.; Brodyn, O. M.; Omelchenko, M. M.; Tortora, L.; Nastishin, Yuriy A.; and Lavrentovich, Oleg (2010). Surface Alignment and Anchoring Transitions in Nematic Lyotropic Chromonic Liquid Crystal. Physical Review Letters 105(1). doi: 10.1103/PhysRevLett.105.017801 Retrieved from http://digitalcommons.kent.edu/cpippubs/220