SURFACE EFFECT ON THE THRESHOLD ELECTRIC-FIELDS OF CHOLESTERIC-NEMATIC PHASE-TRANSITION AND ITS REVERSE PROCESS

被引：10

作者：

MOCHIZUKI, A ^{[1
]}

KOBAYASHI, S ^{[1
]}

机构：

[1] TOKYO UNIV AGR & TECHNOL,GRAD SCH TECHNOL,DIV ELECTR & INFORMAT ENGN,KOGANEI,TOKYO 184,JAPAN

来源：

MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 1993年 / 225卷

关键词：

CHOLESTERIC; NEMATIC; PHASE TRANSITION; SURFACE INTERACTION; ANCHORING ENERGY;

D O I：

10.1080/10587259308036220

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Electric-field-induced cholesteric-nematic (Ch-N) phase transition and its reverse process (N-Ch) are discussed by taking account of the surface interaction effect. Threshold electric fields of a cholesteric to nematic and a nematic to cholesteric phase transition are investigated in conjunction with a liquid crystal layer thickness and surface anchoring strength. By performing a fitting of the theoretical curves to the experimental results of the threshold electric field strengths, we concluded that in a homeotropically aligned thin cell whose liquid crystal layer thickness is below 10 mum, the surface anchoring energy, A(theta), contributes significantly to reduce the threshold electric fields both for the Ch-N phase transition and that of N-Ch.

引用

页码：89 / 98

页数：10

共 17 条

[1]

DEGENNES PG, 1968, SOLID STATE COMMUN, V6, P168

[2] ON THE CHOLESTERIC-NEMATIC PHASE-CHANGE TRANSITION IN LAYERS WITH HOMEOTROPICALLY ORIENTING SURFACES [J].

GERBER, PR .

ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES, 1983, 38 (04) :407-414

[3]

GHARADJEDAGHI F, 1981, MOL CRYST LIQ CRYST, V68, P127

[4] BISTABILITY BEHAVIOR OF TEXTURE IN CHOLESTERIC LIQUID-CRYSTALS IN AN ELECTRIC-FIELD [J].

GREUBEL, W .

APPLIED PHYSICS LETTERS, 1974, 25 (01) :5-7

[5] SWITCHING CHARACTERISTICS OF A BISTABLE CHOLESTERIC TWIST CELL [J].

HEFFNER, WR ;

BERREMAN, DW .

JOURNAL OF APPLIED PHYSICS, 1982, 53 (12) :8599-8606

[6]

HWILMEIR GH, 1968, APPL PHYS LETT, V13, P132

[7] HYSTERESIS BEHAVIOR OF TEXTURE IN FIELD-INDUCED NEMATIC-CHOLESTERIC RELAXATION [J].

KAWACHI, M ;

KOGURE, O .

JAPANESE JOURNAL OF APPLIED PHYSICS, 1977, 16 (09) :1673-1678

[8] LIGHT-SCATTERING PROPERTIES OF A NEMATIC-CHOLESTERIC MIXTURE WITH POSITIVE DIELECTRIC ANISOTROPY [J].

KAWACHI, M ;

KATO, K ;

KOGURE, O .

JAPANESE JOURNAL OF APPLIED PHYSICS, 1977, 16 (07) :1263-1264

[9] THE EFFECT OF HOMEOTROPIC SURFACE ANCHORING ON THE CRITICAL VOLTAGE FOR UNWINDING THE CHOLESTERIC PHASE [J].

LEE, JC ;

ALLENDER, DW ;

NEFF, VD .

MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 1992, 210 :11-20

[10] TRISTABILITY IN THE ELECTRIC-FIELD-INDUCED PHASE-TRANSFORMATION OF LIQUID-CRYSTAL FILMS [J].

LINHENDEL, CG .

APPLIED PHYSICS LETTERS, 1981, 38 (08) :615-617

← 1 2 →