Physical Review Letters
induced orientational order, isotropic-phase, pretransitional birefringence, transition, strength, model
H-2 NMR of a liquid crystal confined to submicron cylindrical cavities, in a 17-K interval above the nematic-isotropic transition, reveals a weakly orientationally ordered molecular layer at the cavity wall governed by local interactions. The order (S0 = 0.02) is temperature independent so that a partial wetting is realized with no prewetting transition expected. A molecular exchange rate between the surface layer and the bulk is measured to be approximately 10(3) s-1. The coherence length measuring the order penetrating further into the cavity is described by alpha = 0.4 and xi-0 = 0.6 nm.
Crawford, G. P.; Yang, Deng-Ke; Zumer, S.; Finotello, D.; and Doane, J. William (1990). Ordering and Self-Diffusion in the 1st Molecular Layer at a Liquid-Crystal Polymer Interface. Physical Review Letters 66(6), 723-726. doi: 10.1103/PhysRevLett.66.723 Retrieved from http://digitalcommons.kent.edu/cpippubs/256