PORE-SIZE-DEPENDENT ORIENTATIONAL DYNAMICS OF A LIQUID-CRYSTAL CONFINED IN A POROUS-GLASS

被引：65

作者：

SCHWALB, G

DEEG, FW

机构：

[1] Institut für Physikalische Chemie, Universität München

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 74卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.74.1383

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Time-resolved transient grating optical Kerr effect experiments were used to investigate the collective reorientational dynamics of pentylcyanobiphenyl embedded in the nanometer-length-scale pores of silica glasses. Measurements in the bulk pretransitional temperature range show a drastic decrease of the relaxation time of the order-parameter fluctuations compared to the bulk with a pronounced pore-size dependence. A Landau model based on independent pore segments can explain the pore-size dependence, but cannot satisfactorily reproduce the observed nonexponentiality of the decays. © 1995 The American Physical Society.

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页码：1383 / 1386

页数：4

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