Applied Physics Letters
liquid-crystal, director distribution, wall interface, energy, surface
A method to determine the surface anchoring energy of a nematic liquid crystal is proposed. The technique implies the measurements of optical retardation of a nematic cell as a function of a strength and direction of the applied magnetic field. It enables one to get both pretilt angle α and anchoring coefficient W a in the course of the same experiment. As an example, both parameters (α=10.9° and W a =1.5×10−5 J/m2) are measured at the interface between the nematic 5CB and rubbed polyimide film.
Subacius, Darius; Pergamenshchik, V. M.; and Lavrentovich, Oleg (1995). Measurement of Polar Anchoring Coefficient for Nematic Cell with High Pretilt Angle. Applied Physics Letters 67(2), 214-216. doi: 10.1063/1.114671 Retrieved from http://digitalcommons.kent.edu/cpippubs/189