ELECTRIC-FIELD EFFECTS ON THE DROPLET STRUCTURE IN POLYMER DISPERSED CHOLESTERIC LIQUID-CRYSTALS

被引：35

作者：

KITZEROW, HS

CROOKER, PP

机构：

[1] UNIV HAWAII MANOA,DEPT PHYS & ASTRON,HONOLULU,HI 96822

[2] TECH UNIV BERLIN,IWAN N STRANSKI INST PHYS & THEORET CHEM,W-1000 BERLIN 12,GERMANY

来源：

LIQUID CRYSTALS | 1993年 / 13卷 / 01期

关键词：

D O I：

10.1080/02678299308029051

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The behaviour of polymer dispersed cholesteric droplets in electric fields has been investigated for materials with both negative and positive dielectric anisotropy. Microscopic observations parallel and perpendicular to the electric field were performed. In materials with epsilon(a) < 0, the cholesteric pitch remains constant but a disclination ring occurs due to reorientation of the local helix directions. In systems with epsilon(a) > 0, however, helical unwinding was observed.

引用

收藏

页码：31 / 43

页数：13

相关论文

共 19 条

[1] STRUCTURES OF THE CHOLESTERIC LIQUID-CRYSTAL DROPLETS WITH PARALLEL SURFACE ANCHORING [J].

BEZIC, J ;

ZUMER, S .

LIQUID CRYSTALS, 1992, 11 (04) :593-619

[2] THE ORGANIZATION OF CHOLESTERIC SPHERULITES [J].

BOULIGAND, Y ;

LIVOLANT, F .

JOURNAL DE PHYSIQUE, 1984, 45 (12) :1899-1923

[3] MAGNETIC-FIELD EFFECTS IN NEMATIC AND CHOLESTERIC DROPLETS SUSPENDED IN AN ISOTROPIC LIQUID [J].

CANDAU, S ;

LEROY, P ;

DEBEAUVAIS, F .

MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 1973, 23 (3-4) :283-297

[4] POLYMER-DISPERSED CHIRAL LIQUID-CRYSTAL COLOR DISPLAY [J].

CROOKER, PP ;

YANG, DK .

APPLIED PHYSICS LETTERS, 1990, 57 (24) :2529-2531

[5] CALCULATION OF DISTORTION IN A CHOLESTEROL STRUCTURE BY A MAGNETIC FIELD [J].

DEGENNES, PG .

SOLID STATE COMMUNICATIONS, 1968, 6 (03) :163-&

[6]

Doane J.W, 1990, LIQUID CRYSTALS APPL, V1, P361

[7] POLYMER DISPERSED LIQUID-CRYSTALS FOR DISPLAY APPLICATION [J].

DOANE, JW ;

GOLEMME, A ;

WEST, JL ;

WHITEHEAD, JB ;

WU, BG .

MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 1988, 165 :511-532

[8] CONFIGURATION TRANSITION IN A NEMATIC LIQUID-CRYSTAL CONFINED TO A SMALL SPHERICAL CAVITY [J].

ERDMANN, JH ;

ZUMER, S ;

DOANE, JW .

PHYSICAL REVIEW LETTERS, 1990, 64 (16) :1907-1910

[9]

Friedel G., 1922, ANN PHYS, V18, P273, DOI DOI 10.1051/ANPHYS/192209180273

[10] LINEAR ELECTROOPTIC EFFECTS IN POLYMER-DISPERSED FERROELECTRIC LIQUID-CRYSTALS [J].

KITZEROW, HS ;

MOLSEN, H ;

HEPPKE, G .

APPLIED PHYSICS LETTERS, 1992, 60 (25) :3093-3095