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

页码：8265 / 8268

页数：4

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