UV-driven in-plane rotation of a liquid crystal director in poly(vinyl cinnamate) films having microscale grooves

被引：1

作者：

Ahn, Dowon ^{[1
]}

Jeong, Yong-Cheol ^{[1
]}

Lee, Seungwoo ^{[1
]}

Park, Jung-Ki ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol, Dept Chem & Biomol Engn, Taejon 305701, South Korea

来源：

OPTICS LETTERS | 2010年 / 35卷 / 18期

关键词：

SURFACE ALIGNMENT;

D O I：

10.1364/OL.35.003141

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The micropatterned poly(vinyl cinnamate) (PVCi) alignment layers are fabricated by a solvent-assisted micromolding method. Without UV irradiation, the alignment layer can induce the unidirectional liquid crystal (LC) orientation, which is influenced by topography-based anchoring energies. With photodimerization of PVCi by UV irradiation, we could modulate the anchoring energies caused by chemical interactions of the alignment layer. It is observed that these two different contributions compete against each other in determining LC rotation on the surface of the alignment layer. The rotation angle of LC directors could be controlled from 45 to 70 by simply changing the UV exposure dose. (C) 2010 Optical Society of America

引用

页码：3141 / 3143

页数：3

共 13 条

[1] Control of liquid crystal pretilt angles by using organic/inorganic hybrid interpenetrating networks [J].

Ahn, Dowon ;

Jeong, Yong-Cheol ;

Lee, Seungwoo ;

Lee, Jihye ;

Heo, Yongjoon ;

Park, Jung-Ki .

OPTICS EXPRESS, 2009, 17 (19) :16603-16612

[2] SOLID SURFACE SHAPE AND ALIGNMENT OF AN ADJACENT NEMATIC LIQUID-CRYSTAL [J].

BERREMAN, DW .

PHYSICAL REVIEW LETTERS, 1972, 28 (26) :1683-&

[3] ALIGNMENT OF LIQUID-CRYSTALS BY GROOVED SURFACES [J].

BERREMAN, DW .

MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 1973, 23 (3-4) :215-231

[4] Photoinduced ordering and alignment properties of polyvinylcinnamates [J].

BryanBrown, GP ;

Sage, IC .

LIQUID CRYSTALS, 1996, 20 (06) :825-829

[5] Higher-order surface free energy in azimuthal nematic anchoring on nanopatterned grooves [J].

Gwag, Jin Seog ;

Kwon, Jin Hyuk ;

Oh-e, Masahito ;

Niitsuma, Jun-ichi ;

Yoneya, Makoto ;

Yokoyama, Hiroshi .

APPLIED PHYSICS LETTERS, 2009, 95 (10)

[6]

Haaren J.V., 2001, NATURE, V411, P29, DOI DOI 10.1038/35075178

[7] Unusual alignment of liquid crystals on rubbed films of polyimides with fluorenyl side groups [J].

Hahm, Suk Gyu ;

Lee, Taek Joon ;

Chang, Taihyun ;

Jung, Jin Chul ;

Zin, Wang-Cheol ;

Ree, Moonhor .

MACROMOLECULES, 2006, 39 (16) :5385-5392

[8] Tristable nematic liquid-crystal device using micropatterned surface alignment [J].

Kim, JH ;

Yoneya, M ;

Yokoyama, H .

NATURE, 2002, 420 (6912) :159-162

[9] Surface alignment bistability of nematic liquid crystals by orientationally frustrated surface patterns [J].

Kim, JH ;

Yoneya, M ;

Yamamoto, J ;

Yokoyama, H .

APPLIED PHYSICS LETTERS, 2001, 78 (20) :3055-3057

[10] CREATION OF LIQUID-CRYSTAL WAVE-GUIDES WITH SCANNING FORCE MICROSCOPY [J].

RUETSCHI, M ;

GRUTTER, P ;

FUNFSCHILLING, J ;

GUNTHERODT, HJ .

SCIENCE, 1994, 265 (5171) :512-514

← 1 2 →