ORDERING AND SELF-DIFFUSION IN THE 1ST MOLECULAR LAYER AT A LIQUID-CRYSTAL POLYMER INTERFACE

被引:99
|
作者
CRAWFORD, GP [1 ]
YANG, DK [1 ]
ZUMER, S [1 ]
FINOTELLO, D [1 ]
DOANE, JW [1 ]
机构
[1] KENT STATE UNIV,DEPT PHYS,KENT,OH 44242
关键词
D O I
10.1103/PhysRevLett.66.723
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
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.
引用
收藏
页码:723 / 726
页数:4
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