Publication Title

Physical Review Letters

Publication Date

8-2-1990

Document Type

Article

DOI

10.1103/PhysRevLett.66.723

Keywords

induced orientational order, isotropic-phase, pretransitional birefringence, transition, strength, model

Disciplines

Physics

Abstract

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.

Comments

Copyright 1991 American Physical Society. Available on publisher's site at http://dx.doi.org/10.1103/PhysRevLett.66.723


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