Dielectric anisotropy effects on pretilt angle generation for nematic liquid crystals on a polymer layer

Dae Shik Seo; Jeoung Yeon Hwang; Sang Keuk Lee; Seung Hee Lee; Seung Kwon Paek

doi:10.1080/15421400490439923

Dielectric anisotropy effects on pretilt angle generation for nematic liquid crystals on a polymer layer

Dae Shik Seo^*
, Jeoung Yeon Hwang
, Sang Keuk Lee
, Seung Hee Lee
, Seung Kwon Paek

^*Corresponding author for this work

Department of Polymer -Nano Science &Technology

Research output: Contribution to journal › Conference article › peer-review

2 Scopus citations

Abstract

Generation of the pretilt angle in nematic liquid crystal (NLC) with negative dielectric anisotropy and cyano (CN) mixtures on a rubbed polyimide (PI) surface was studied. The pretilt angle of negative type NLC generated was larger than that of the positive type NLC on the rubbed PI surface for homogeneous alignment. However, the pretilt angle of negative type NLC generated was lower than that of the positive type NLC on the rubbed PI surface for homeotropic alignment. The different mechanisms of LC pretilt angle for homeotropic and homogeneous alignment can be observed. The pretilt angle increases with cyano content on the rubbed PI surface for homogeneous alignment and then saturates with further addition.

Original language	English
Pages (from-to)	277/[1887]-283/[1893]
Journal	Molecular Crystals and Liquid Crystals
Volume	412
DOIs	https://doi.org/10.1080/15421400490439923
State	Published - 2004
Event	Proceedings of the 19th International Liquid Crystal Conference, ILCC2002 - Edinburgh, United Kingdom Duration: 2002.06.30 → 2002.07.5

Keywords

Cyano LC
Homeotropic alignment
Liquid crystal (NLC)
Negative dielectric anisotropy
Nematic
Pretilt angle

Quacquarelli Symonds(QS) Subject Topics

Materials Science
Chemistry
Physics & Astronomy

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10.1080/15421400490439923

Cite this

@article{1c7189984a7c4aba847c3ad31ecaf935,

title = "Dielectric anisotropy effects on pretilt angle generation for nematic liquid crystals on a polymer layer",

abstract = "Generation of the pretilt angle in nematic liquid crystal (NLC) with negative dielectric anisotropy and cyano (CN) mixtures on a rubbed polyimide (PI) surface was studied. The pretilt angle of negative type NLC generated was larger than that of the positive type NLC on the rubbed PI surface for homogeneous alignment. However, the pretilt angle of negative type NLC generated was lower than that of the positive type NLC on the rubbed PI surface for homeotropic alignment. The different mechanisms of LC pretilt angle for homeotropic and homogeneous alignment can be observed. The pretilt angle increases with cyano content on the rubbed PI surface for homogeneous alignment and then saturates with further addition.",

keywords = "Cyano LC, Homeotropic alignment, Liquid crystal (NLC), Negative dielectric anisotropy, Nematic, Pretilt angle",

author = "Seo, \{Dae Shik\} and Hwang, \{Jeoung Yeon\} and Lee, \{Sang Keuk\} and Lee, \{Seung Hee\} and Paek, \{Seung Kwon\}",

year = "2004",

doi = "10.1080/15421400490439923",

language = "English",

volume = "412",

pages = "277/[1887]--283/[1893]",

journal = "Molecular Crystals and Liquid Crystals",

issn = "1542-1406",

note = "Proceedings of the 19th International Liquid Crystal Conference, ILCC2002 ; Conference date: 30-06-2002 Through 05-07-2002",

}

TY - JOUR

T1 - Dielectric anisotropy effects on pretilt angle generation for nematic liquid crystals on a polymer layer

AU - Seo, Dae Shik

AU - Hwang, Jeoung Yeon

AU - Lee, Sang Keuk

AU - Lee, Seung Hee

AU - Paek, Seung Kwon

PY - 2004

Y1 - 2004

N2 - Generation of the pretilt angle in nematic liquid crystal (NLC) with negative dielectric anisotropy and cyano (CN) mixtures on a rubbed polyimide (PI) surface was studied. The pretilt angle of negative type NLC generated was larger than that of the positive type NLC on the rubbed PI surface for homogeneous alignment. However, the pretilt angle of negative type NLC generated was lower than that of the positive type NLC on the rubbed PI surface for homeotropic alignment. The different mechanisms of LC pretilt angle for homeotropic and homogeneous alignment can be observed. The pretilt angle increases with cyano content on the rubbed PI surface for homogeneous alignment and then saturates with further addition.

AB - Generation of the pretilt angle in nematic liquid crystal (NLC) with negative dielectric anisotropy and cyano (CN) mixtures on a rubbed polyimide (PI) surface was studied. The pretilt angle of negative type NLC generated was larger than that of the positive type NLC on the rubbed PI surface for homogeneous alignment. However, the pretilt angle of negative type NLC generated was lower than that of the positive type NLC on the rubbed PI surface for homeotropic alignment. The different mechanisms of LC pretilt angle for homeotropic and homogeneous alignment can be observed. The pretilt angle increases with cyano content on the rubbed PI surface for homogeneous alignment and then saturates with further addition.

KW - Cyano LC

KW - Homeotropic alignment

KW - Liquid crystal (NLC)

KW - Negative dielectric anisotropy

KW - Nematic

KW - Pretilt angle

UR - https://www.scopus.com/pages/publications/12844253146

U2 - 10.1080/15421400490439923

DO - 10.1080/15421400490439923

M3 - Conference article

AN - SCOPUS:12844253146

SN - 1542-1406

VL - 412

SP - 277/[1887]-283/[1893]

JO - Molecular Crystals and Liquid Crystals

JF - Molecular Crystals and Liquid Crystals

T2 - Proceedings of the 19th International Liquid Crystal Conference, ILCC2002

Y2 - 30 June 2002 through 5 July 2002

ER -

Dielectric anisotropy effects on pretilt angle generation for nematic liquid crystals on a polymer layer

Abstract

Keywords

Quacquarelli Symonds(QS) Subject Topics

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