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

Research output: Contribution to journalConference article

2 Citations (Scopus)

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 languageEnglish
JournalMolecular Crystals and Liquid Crystals
Volume412
DOIs
Publication statusPublished - 2004 Dec 1
EventProceedings of the 19th International Liquid Crystal Conference, ILCC2002 - Edinburgh, United Kingdom
Duration: 2002 Jun 302002 Jul 5

Fingerprint

Nematic liquid crystals
Polymers
Anisotropy
polyimides
Polyimides
liquid crystals
anisotropy
alignment
polymers

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

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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.",
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Dielectric anisotropy effects on pretilt angle generation for nematic liquid crystals on a polymer layer. / Seo, Dae-Shik; Hwang, Jeoung Yeon; Lee, Sang Keuk; Lee, Seung Hee; Paek, Seung Kwon.

In: Molecular Crystals and Liquid Crystals, Vol. 412, 01.12.2004.

Research output: Contribution to journalConference article

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 - 2004/12/1

Y1 - 2004/12/1

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.

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