PHASE-BEHAVIOR OF THE LIQUID-CRYSTAL 8CB IN A SILICA AEROGEL

被引：206

作者：

BELLINI, T

CLARK, NA

MUZNY, CD

WU, L

GARLAND, CW

SCHAEFER, DW

OLIVIER, BJ

OLIVER, BJ

机构：

[1] MIT,DEPT CHEM,CAMBRIDGE,MA 02139

[2] SANDIA NATL LABS,ALBUQUERQUE,NM 87185

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 69卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.69.788

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Light scattering and precision calorimetry show that the nematic ordering of octylcyanobiphenyl (8CB) filling the connected network of pores of a silica aerogel does not occur via the first-order phase transition characteristic of the bulk. Rather, ordering is continuous with an orientational correlation length never increasing beyond the aerogel pore size. The heat-capacity anomaly of the second-order nematic-smectic-A phase transition seen in the bulk is absent or greatly broadened in the aerogel.

引用

页码：788 / 791

页数：4

共 26 条

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