Orientational control of liquid crystal molecules by reformed poly(dimethylsiloxane) alignment layer via ion-beam irradiation

Hee Jun Lee; Young Hwan Kim; Jong Jin Lee; Hong Gyu Park; Seok Yang; Byoung Yong Kim; Yang Doo Lee; Byeong Kwon Ju; Dae Shik Seo

doi:10.1016/j.matchemphys.2011.01.005

Orientational control of liquid crystal molecules by reformed poly(dimethylsiloxane) alignment layer via ion-beam irradiation

Hee Jun Lee, Young Hwan Kim, Jong Jin Lee, Hong Gyu Park, Seok Yang, Byoung Yong Kim, Yang Doo Lee, Byeong Kwon Ju, Dae Shik Seo

School of Electrical Engineering

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

6 Citations (Scopus)

Abstract

We introduce an alternative approach to making a reformed PDMS layer as a pretilt controllable alignment layer, which can be used in the vertical alignment (VA) and twisted nematic (TN) modes, by varying the ion beam (IB) energy. Depending on different the dielectric anisotropy of surfaces, PDMS layers have been demonstrated to align LC molecules homogeneously and homeotropically. The electro-optic characteristics of aligned VA and TN-LCD based on PDMS layer were comparable to those of VA and TN-LCD based on polyimide, showing good potential of PDMS film as an alignment layer.

Original language	English
Pages (from-to)	628-631
Number of pages	4
Journal	Materials Chemistry and Physics
Volume	126
Issue number	3
DOIs	https://doi.org/10.1016/j.matchemphys.2011.01.005
Publication status	Published - 2011 Apr 15

Keywords

Dielectric anisotropic
Ion beam
Liquid crystal
Polydimethylsiloxane
Pretilt angle

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics

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10.1016/j.matchemphys.2011.01.005

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Orientational control of liquid crystal molecules by reformed poly(dimethylsiloxane) alignment layer via ion-beam irradiation. / Lee, Hee Jun; Kim, Young Hwan; Lee, Jong Jin; Park, Hong Gyu; Yang, Seok; Kim, Byoung Yong; Lee, Yang Doo; Ju, Byeong Kwon; Seo, Dae Shik.

In: Materials Chemistry and Physics, Vol. 126, No. 3, 15.04.2011, p. 628-631.

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

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abstract = "We introduce an alternative approach to making a reformed PDMS layer as a pretilt controllable alignment layer, which can be used in the vertical alignment (VA) and twisted nematic (TN) modes, by varying the ion beam (IB) energy. Depending on different the dielectric anisotropy of surfaces, PDMS layers have been demonstrated to align LC molecules homogeneously and homeotropically. The electro-optic characteristics of aligned VA and TN-LCD based on PDMS layer were comparable to those of VA and TN-LCD based on polyimide, showing good potential of PDMS film as an alignment layer.",

keywords = "Dielectric anisotropic, Ion beam, Liquid crystal, Polydimethylsiloxane, Pretilt angle",

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AU - Lee, Hee Jun

AU - Kim, Young Hwan

AU - Lee, Jong Jin

AU - Park, Hong Gyu

AU - Yang, Seok

AU - Kim, Byoung Yong

AU - Lee, Yang Doo

AU - Ju, Byeong Kwon

AU - Seo, Dae Shik

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AB - We introduce an alternative approach to making a reformed PDMS layer as a pretilt controllable alignment layer, which can be used in the vertical alignment (VA) and twisted nematic (TN) modes, by varying the ion beam (IB) energy. Depending on different the dielectric anisotropy of surfaces, PDMS layers have been demonstrated to align LC molecules homogeneously and homeotropically. The electro-optic characteristics of aligned VA and TN-LCD based on PDMS layer were comparable to those of VA and TN-LCD based on polyimide, showing good potential of PDMS film as an alignment layer.

KW - Dielectric anisotropic

KW - Ion beam

KW - Liquid crystal

KW - Polydimethylsiloxane

KW - Pretilt angle

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