Vertically aligned liquid crystals on a γ -Al2O 3 alignment film using ion-beam irradiation

Hong Gyu Park; Young Hwan Kim; Byeong Yun Oh; Won Kyu Lee; Byoung Yong Kim; Dae Shik Seo; Jeong Yeon Hwang

doi:10.1063/1.3046728

Vertically aligned liquid crystals on a γ -Al₂O ₃ alignment film using ion-beam irradiation

Hong Gyu Park, Young Hwan Kim, Byeong Yun Oh, Won Kyu Lee, Byoung Yong Kim, Dae Shik Seo, Jeong Yeon Hwang

Department of Electrical and Electronic Engineering

Research output: Contribution to journal › Article

51 Citations (Scopus)

Abstract

Using ion-beam (IB) irradiation, liquid crystals (LCs) were vertically aligned (VA) on a γ -Al₂O₃ alignment film. Atomic-layer deposition was used to orient the LCs on high-quality γ -Al₂O₃ alignment films. The LC molecule orientation indicates the vertical direction of the atomic-layer-deposited γ -Al ₂O₃ alignment films. X-ray photoelectron spectroscopy showed that IB irradiation changed the chemical structure, shifting the Al-O binding energy and altering the Al-O bonding intensity. The low-voltage transmittance characteristics of the VA LC displays on the γ -Al ₂O₃ alignment films were also measured, showing reduced voltage and power requirements.

Original language	English
Article number	233507
Journal	Applied Physics Letters
Volume	93
Issue number	23
DOIs	https://doi.org/10.1063/1.3046728
Publication status	Published - 2008 Dec 19

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.3046728

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Park, H. G., Kim, Y. H., Oh, B. Y., Lee, W. K., Kim, B. Y., Seo, D. S., & Hwang, J. Y. (2008). Vertically aligned liquid crystals on a γ -Al₂O ₃ alignment film using ion-beam irradiation. Applied Physics Letters, 93(23), [233507]. https://doi.org/10.1063/1.3046728

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abstract = "Using ion-beam (IB) irradiation, liquid crystals (LCs) were vertically aligned (VA) on a γ -Al2O3 alignment film. Atomic-layer deposition was used to orient the LCs on high-quality γ -Al2O3 alignment films. The LC molecule orientation indicates the vertical direction of the atomic-layer-deposited γ -Al 2O3 alignment films. X-ray photoelectron spectroscopy showed that IB irradiation changed the chemical structure, shifting the Al-O binding energy and altering the Al-O bonding intensity. The low-voltage transmittance characteristics of the VA LC displays on the γ -Al 2O3 alignment films were also measured, showing reduced voltage and power requirements.",

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AU - Seo, Dae Shik

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