Homogeneously aligned liquid crystal molecules on reformed poly(methyl methacrylate) via ion-beam irradiation

Hae Chang Jeong; Hong Gyu Park; Ju Hwan Lee; Sang Bok Jang; Byeong Yun Oh; Jeong Min Han; Dae Shik Seo

doi:10.1016/j.optmat.2016.02.045

Homogeneously aligned liquid crystal molecules on reformed poly(methyl methacrylate) via ion-beam irradiation

Hae Chang Jeong, Hong Gyu Park, Ju Hwan Lee, Sang Bok Jang, Byeong Yun Oh, Jeong Min Han, Dae Shik Seo

Department of Electrical and Electronic Engineering

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

6 Citations (Scopus)

Abstract

We demonstrated uniform LC alignment using IB-irradiated poly(methyl methacrylate) (PMMA) as an alignment layer. We confirmed the topographical changes on PMMA caused by IB irradiation. Moreover, the wettability and chemical modification of the PMMA surface were investigated as functions of incidence angle. The results show that PMMA irradiated with IB at an incidence angle of 30° had a higher molecular polarity than PMMA irradiated with IB at other incidence angles, resulting in strong van der Waals interactions between the surface and LC molecules. The LC cells containing PMMA irradiated with IB at an incidence angle of 30° exhibited good thermal stability (180°) compared with LC cells containing conventional rubbing PI (150°). In addition, LC molecules on PMMA irradiated with IB at an incidence angle of 30° were observed to switch faster than those on conventional rubbing PI. Therefore, PMMA irradiated with IB under the optimal conditions may allow for PMMA to be applied in advanced LC devices as an alternative alignment layer.

Original language	English
Pages (from-to)	288-293
Number of pages	6
Journal	Optical Materials
Volume	54
DOIs	https://doi.org/10.1016/j.optmat.2016.02.045
Publication status	Published - 2016 Apr 1

Bibliographical note

Publisher Copyright:
© 2016 Elsevier B.V. All rights reserved.

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Computer Science(all)
Atomic and Molecular Physics, and Optics
Spectroscopy
Physical and Theoretical Chemistry
Organic Chemistry
Inorganic Chemistry
Electrical and Electronic Engineering

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10.1016/j.optmat.2016.02.045

Cite this

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title = "Homogeneously aligned liquid crystal molecules on reformed poly(methyl methacrylate) via ion-beam irradiation",

abstract = "We demonstrated uniform LC alignment using IB-irradiated poly(methyl methacrylate) (PMMA) as an alignment layer. We confirmed the topographical changes on PMMA caused by IB irradiation. Moreover, the wettability and chemical modification of the PMMA surface were investigated as functions of incidence angle. The results show that PMMA irradiated with IB at an incidence angle of 30° had a higher molecular polarity than PMMA irradiated with IB at other incidence angles, resulting in strong van der Waals interactions between the surface and LC molecules. The LC cells containing PMMA irradiated with IB at an incidence angle of 30° exhibited good thermal stability (180°) compared with LC cells containing conventional rubbing PI (150°). In addition, LC molecules on PMMA irradiated with IB at an incidence angle of 30° were observed to switch faster than those on conventional rubbing PI. Therefore, PMMA irradiated with IB under the optimal conditions may allow for PMMA to be applied in advanced LC devices as an alternative alignment layer.",

author = "Jeong, {Hae Chang} and Park, {Hong Gyu} and Lee, {Ju Hwan} and Jang, {Sang Bok} and Oh, {Byeong Yun} and Han, {Jeong Min} and Seo, {Dae Shik}",

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doi = "10.1016/j.optmat.2016.02.045",

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T1 - Homogeneously aligned liquid crystal molecules on reformed poly(methyl methacrylate) via ion-beam irradiation

AU - Jeong, Hae Chang

AU - Park, Hong Gyu

AU - Lee, Ju Hwan

AU - Jang, Sang Bok

AU - Oh, Byeong Yun

AU - Han, Jeong Min

AU - Seo, Dae Shik

PY - 2016/4/1

Y1 - 2016/4/1

N2 - We demonstrated uniform LC alignment using IB-irradiated poly(methyl methacrylate) (PMMA) as an alignment layer. We confirmed the topographical changes on PMMA caused by IB irradiation. Moreover, the wettability and chemical modification of the PMMA surface were investigated as functions of incidence angle. The results show that PMMA irradiated with IB at an incidence angle of 30° had a higher molecular polarity than PMMA irradiated with IB at other incidence angles, resulting in strong van der Waals interactions between the surface and LC molecules. The LC cells containing PMMA irradiated with IB at an incidence angle of 30° exhibited good thermal stability (180°) compared with LC cells containing conventional rubbing PI (150°). In addition, LC molecules on PMMA irradiated with IB at an incidence angle of 30° were observed to switch faster than those on conventional rubbing PI. Therefore, PMMA irradiated with IB under the optimal conditions may allow for PMMA to be applied in advanced LC devices as an alternative alignment layer.

AB - We demonstrated uniform LC alignment using IB-irradiated poly(methyl methacrylate) (PMMA) as an alignment layer. We confirmed the topographical changes on PMMA caused by IB irradiation. Moreover, the wettability and chemical modification of the PMMA surface were investigated as functions of incidence angle. The results show that PMMA irradiated with IB at an incidence angle of 30° had a higher molecular polarity than PMMA irradiated with IB at other incidence angles, resulting in strong van der Waals interactions between the surface and LC molecules. The LC cells containing PMMA irradiated with IB at an incidence angle of 30° exhibited good thermal stability (180°) compared with LC cells containing conventional rubbing PI (150°). In addition, LC molecules on PMMA irradiated with IB at an incidence angle of 30° were observed to switch faster than those on conventional rubbing PI. Therefore, PMMA irradiated with IB under the optimal conditions may allow for PMMA to be applied in advanced LC devices as an alternative alignment layer.

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JO - Optical Materials

JF - Optical Materials

ER -

Homogeneously aligned liquid crystal molecules on reformed poly(methyl methacrylate) via ion-beam irradiation

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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