Freedericksz transition in confined liquid crystals: Concentration and microgeometry effects

被引：9

作者：

Levy, O ^{[1
]}

机构：

[1] Nucl Res Ctr Negev, Dept Phys, IL-84190 Beer Sheva, Israel

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.86.2822

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The Freedericksz transition in dispersions of liquid-crystal droplets is studied analytically by balancing the electrostatic energy of the droplets with a strong anchoring elastic energy. Explicit dependence of the transition threshold field on the liquid-crystal volume fraction and the spatial arrangement of the droplets is obtained for the first time. As a result of the confined geometry, this threshold field does not depend on the thickness of the sample and splitting of the transition occurs in some situations.

引用

页码：2822 / 2825

页数：4

共 24 条

[1] Anchoring and droplet deformation in polymer dispersed liquid crystals: NMR study in an electric field [J].

Ambrozic, M ;

Formoso, P ;

Golemme, A ;

Zumer, S .

PHYSICAL REVIEW E, 1997, 56 (02) :1825-1832

[2] Morphology and electro-optic properties of polymer-dispersed liquid-crystal films [J].

Amundson, K ;

vanBlaaderen, A ;

Wiltzius, P .

PHYSICAL REVIEW E, 1997, 55 (02) :1646-1654

[3] Electro-optic properties of a polymer-dispersed liquid-crystal film: Temperature dependence and phase behavior [J].

Amundson, K .

PHYSICAL REVIEW E, 1996, 53 (03) :2412-2422

[4]

AMUNDSON KR, 1998, PHYS REV E, V58, P1211

[5]

[Anonymous], 1983, ELECT OPTICAL MAGNET

[6] Polarity sensitive electrooptical response in a nematic liquid crystal-polymer mixture [J].

Bartolino, R ;

Scaramuzza, N ;

Lucchetta, DE ;

Barna, ES ;

Ionescu, AT ;

Blinov, LM .

JOURNAL OF APPLIED PHYSICS, 1999, 85 (05) :2870-2874

[7] SOLID MIXTURE PERMITTIVITIES [J].

BROWN, WF .

JOURNAL OF CHEMICAL PHYSICS, 1955, 23 (08) :1514-1517

[8] Dependence of the morphology of polymer dispersed liquid crystals on the UV polymerization process [J].

Carter, SA ;

LeGrange, JD ;

White, W ;

Boo, J ;

Wiltzius, P .

JOURNAL OF APPLIED PHYSICS, 1997, 81 (09) :5992-5999

[9] Reorientation in random potential: A Model for glasslike dynamics in confined liquid crystals [J].

Copic, M ;

Mertelj, A .

PHYSICAL REVIEW LETTERS, 1998, 80 (07) :1449-1452

[10]

DEGENNES PG, 1993, PHYSICS LIQUID CRYST

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