NEMATIC SMECTIC-A PHASE-TRANSITION IN ULTRATHIN FILMS OF POLYMERIC LIQUID-CRYSTAL STUDIED BY X-RAY REFLECTIVITY

被引：21
作者：
ENTIN, I [1 ]
GOFFER, R [1 ]
DAVIDOV, D [1 ]
HERSHT, I [1 ]
机构：
[1] BAR ILAN UNIV,DEPT PHYS,RAMAT GAN,ISRAEL
来源：
PHYSICAL REVIEW B | 1993年 / 47卷 / 13期
关键词：
D O I：
10.1103/PhysRevB.47.8265
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The nematic-smectic-A phase transition in thin (100-600 angstrom) films of polymethacrylate liquid-crystal polymer on glass substrates has been studied by means of x-ray reflectivity. In ultrathin films (about 5-7 smectic layers) the phase-transition temperature is several degrees higher than in the bulk or in thicker films. This effect may be attributed to the suppression of thermal fluctuations by the substrate and finite-size effects.
引用
收藏
页码：8265 / 8268
页数：4
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