Investigation of pretilt angle generation in nematic liquid crystal with oblique non-polarized UV light irradiation on polyimide films

被引：34

作者：

Seo, DS ^{[1
]}

Hwang, LY ^{[1
]}

Kobayashi, S ^{[1
]}

机构：

[1] SCI UNIV TOKYO,DEPT ELECT ENGN,ONODA,YAMAGUCHI 755,JAPAN

来源：

LIQUID CRYSTALS | 1997年 / 23卷 / 06期

关键词：

D O I：

10.1080/026782997207876

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We investigated new rubbing-free techniques for liquid crystal (LC) alignment with nonpolarized ultraviolet (UV) light irradiation on plates coated with two kinds of the polyimide (PI) films. It was found that monodomain alignment of nematic (N) LC is obtained in the cell having a PI surface without a side chain. We successfully observed that the generated pretilt angle of the NLC is about 3 degrees with an angle of incidence of 70 degrees on the PI surface without side chains. This pretilt angle generation is attributed to interaction between the LC molecules and the polymer surfaces; the uniform alignment of NLC is attributed to anisotropic dispersion force effects due to photo-depolymerization of polymer on PI surfaces.

引用

页码：923 / 925

页数：3

共 17 条

[1]

CHEN J, 1996, SID 96, P634

[2] THE MECHANISM OF POLYMER ALIGNMENT OF LIQUID-CRYSTAL MATERIALS [J].

GEARY, JM ;

GOODBY, JW ;

KMETZ, AR ;

PATEL, JS .

JOURNAL OF APPLIED PHYSICS, 1987, 62 (10) :4100-4108

[3]

GIBBONS W, 1991, NATURE, V351, P39

[4]

HASEGAWA M, 1994, IDRC 94, P213

[5]

HASHIMOTO T, 1995, SID 95, P877

[6] Estimation of the static electricity and optical retardation produced by rubbing polyimide and polyamide films with different fabrics [J].

Matsuda, H ;

Seo, DS ;

Yoshida, N ;

Fujibayashi, K ;

Kobayashi, S ;

Yabe, Y .

MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 1995, 264 :23-28

[7] PHOTOREGULATION OF TILT ANGLE OF NEMATIC LIQUID-CRYSTALS BY AZOBENZENE LAYERS [J].

SAKURAGI, M ;

TAMAKI, T ;

SEKI, T ;

SUZUKI, Y ;

KAWANISHI, Y ;

ICHIMURA, K .

CHEMISTRY LETTERS, 1992, (09) :1763-1766

[8] PHOTO-GENERATION OF LINEARLY POLYMERIZED LIQUID-CRYSTAL ALIGNING LAYERS COMPRISING NOVEL, INTEGRATED OPTICALLY PATTERNED RETARDERS AND COLOR FILTERS [J].

SCHADT, M ;

SEIBERLE, H ;

SCHUSTER, A ;

KELLY, SM .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 1995, 34 (6A) :3240-3249

[9] VOLTAGE-DEPENDENT OPTICAL ACTIVITY OF A TWISTED NEMATIC LIQUID CRYSTAL [J].

SCHADT, M ;

HELFRICH, W .

APPLIED PHYSICS LETTERS, 1971, 18 (04) :127-&

[10] SURFACE-INDUCED PARALLEL ALIGNMENT OF LIQUID-CRYSTALS BY LINEARLY POLYMERIZED PHOTOPOLYMERS [J].

SCHADT, M ;

SCHMITT, K ;

KOZINKOV, V ;

CHIGRINOV, V .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 1992, 31 (07) :2155-2164

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