Liquid crystal alignment properties on zirconia doped polyimide layer

Hong Gyu Park; Hyung Jun Kim; Hae Yoon Jeong; Suk Yang; Young Gu Kang; Hee Jun Lee; Byeong Yun Oh; Byoung Yong Kim; Young Hwan Kim; Yong Pil Park; Jeong Min Han; Dae Shik Seo

doi:10.1080/15421406.2011.609410

Liquid crystal alignment properties on zirconia doped polyimide layer

Hong Gyu Park, Hyung Jun Kim, Hae Yoon Jeong, Suk Yang, Young Gu Kang, Hee Jun Lee, Byeong Yun Oh, Byoung Yong Kim, Young Hwan Kim, Yong Pil Park, Jeong Min Han, Dae Shik Seo

Department of Electrical and Electronic Engineering

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

This paper introduces zirconia (ZrO₂) use in liquid crystal (LC) alignment for uniform and effective LC orientation. We used a conventional rubbing process to induce LC alignment. As a result, uniform LC alignments were achieved in all samples with ZrO₂ nanoparticles from 0.01 wt% to 0.3 wt%. Pretilt angles of LCs on ZrO₂ nanoparticles doped LC alignment layers slightly increased as the percentage of ZrO₂ nanoparticles rose. However, contact angles were almost the same. When twist-nematic (TN) LC cells used LC alignment layers with ZrO₂ nanoparticle content of 0.1 wt%, best performance was shown. Finally, it is shown that ZrO₂ nanoparticles doped LC alignment layers have more thermal budget than pristine ones in thermal stability test.

Original language	English
Pages (from-to)	90-96
Number of pages	7
Journal	Molecular Crystals and Liquid Crystals
Volume	553
DOIs	https://doi.org/10.1080/15421406.2011.609410
Publication status	Published - 2012 Feb 2

Bibliographical note

Funding Information:
This research was supported by the MKE (The Ministry of Knowledge Economy), Korea, under the ITRC (Information Technology Research Center) support program supervised by the NIPA (National IT Industry Promotion Agency) (NIPA-2011-C1090-1111-0002).

All Science Journal Classification (ASJC) codes

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

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10.1080/15421406.2011.609410

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title = "Liquid crystal alignment properties on zirconia doped polyimide layer",

abstract = "This paper introduces zirconia (ZrO2) use in liquid crystal (LC) alignment for uniform and effective LC orientation. We used a conventional rubbing process to induce LC alignment. As a result, uniform LC alignments were achieved in all samples with ZrO2 nanoparticles from 0.01 wt% to 0.3 wt%. Pretilt angles of LCs on ZrO2 nanoparticles doped LC alignment layers slightly increased as the percentage of ZrO2 nanoparticles rose. However, contact angles were almost the same. When twist-nematic (TN) LC cells used LC alignment layers with ZrO2 nanoparticle content of 0.1 wt%, best performance was shown. Finally, it is shown that ZrO2 nanoparticles doped LC alignment layers have more thermal budget than pristine ones in thermal stability test.",

author = "Park, {Hong Gyu} and Kim, {Hyung Jun} and Jeong, {Hae Yoon} and Suk Yang and Kang, {Young Gu} and Lee, {Hee Jun} and Oh, {Byeong Yun} and Kim, {Byoung Yong} and Kim, {Young Hwan} and Park, {Yong Pil} and Han, {Jeong Min} and Seo, {Dae Shik}",

note = "Funding Information: This research was supported by the MKE (The Ministry of Knowledge Economy), Korea, under the ITRC (Information Technology Research Center) support program supervised by the NIPA (National IT Industry Promotion Agency) (NIPA-2011-C1090-1111-0002).",

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doi = "10.1080/15421406.2011.609410",

language = "English",

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T1 - Liquid crystal alignment properties on zirconia doped polyimide layer

AU - Park, Hong Gyu

AU - Kim, Hyung Jun

AU - Jeong, Hae Yoon

AU - Yang, Suk

AU - Kang, Young Gu

AU - Lee, Hee Jun

AU - Oh, Byeong Yun

AU - Kim, Byoung Yong

AU - Kim, Young Hwan

AU - Park, Yong Pil

AU - Han, Jeong Min

AU - Seo, Dae Shik

N1 - Funding Information: This research was supported by the MKE (The Ministry of Knowledge Economy), Korea, under the ITRC (Information Technology Research Center) support program supervised by the NIPA (National IT Industry Promotion Agency) (NIPA-2011-C1090-1111-0002).

PY - 2012/2/2

Y1 - 2012/2/2

N2 - This paper introduces zirconia (ZrO2) use in liquid crystal (LC) alignment for uniform and effective LC orientation. We used a conventional rubbing process to induce LC alignment. As a result, uniform LC alignments were achieved in all samples with ZrO2 nanoparticles from 0.01 wt% to 0.3 wt%. Pretilt angles of LCs on ZrO2 nanoparticles doped LC alignment layers slightly increased as the percentage of ZrO2 nanoparticles rose. However, contact angles were almost the same. When twist-nematic (TN) LC cells used LC alignment layers with ZrO2 nanoparticle content of 0.1 wt%, best performance was shown. Finally, it is shown that ZrO2 nanoparticles doped LC alignment layers have more thermal budget than pristine ones in thermal stability test.

AB - This paper introduces zirconia (ZrO2) use in liquid crystal (LC) alignment for uniform and effective LC orientation. We used a conventional rubbing process to induce LC alignment. As a result, uniform LC alignments were achieved in all samples with ZrO2 nanoparticles from 0.01 wt% to 0.3 wt%. Pretilt angles of LCs on ZrO2 nanoparticles doped LC alignment layers slightly increased as the percentage of ZrO2 nanoparticles rose. However, contact angles were almost the same. When twist-nematic (TN) LC cells used LC alignment layers with ZrO2 nanoparticle content of 0.1 wt%, best performance was shown. Finally, it is shown that ZrO2 nanoparticles doped LC alignment layers have more thermal budget than pristine ones in thermal stability test.

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JO - Molecular Crystals and Liquid Crystals

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Liquid crystal alignment properties on zirconia doped polyimide layer

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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