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

Research output: Contribution to journalArticle

50 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 languageEnglish
Article number233507
JournalApplied Physics Letters
Volume93
Issue number23
DOIs
Publication statusPublished - 2008 Dec 19

Fingerprint

ion beams
liquid crystals
alignment
irradiation
atomic layer epitaxy
low voltage
transmittance
binding energy
photoelectron spectroscopy
requirements
electric potential
molecules
x rays

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Park, Hong Gyu ; Kim, Young Hwan ; Oh, Byeong Yun ; Lee, Won Kyu ; Kim, Byoung Yong ; Seo, Dae Shik ; Hwang, Jeong Yeon. / Vertically aligned liquid crystals on a γ -Al2O 3 alignment film using ion-beam irradiation. In: Applied Physics Letters. 2008 ; Vol. 93, No. 23.
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Vertically aligned liquid crystals on a γ -Al2O 3 alignment film using ion-beam irradiation. / Park, Hong Gyu; Kim, Young Hwan; Oh, Byeong Yun; Lee, Won Kyu; Kim, Byoung Yong; Seo, Dae Shik; Hwang, Jeong Yeon.

In: Applied Physics Letters, Vol. 93, No. 23, 233507, 19.12.2008.

Research output: Contribution to journalArticle

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AU - Kim, Young Hwan

AU - Oh, Byeong Yun

AU - Lee, Won Kyu

AU - Kim, Byoung Yong

AU - Seo, Dae Shik

AU - Hwang, Jeong Yeon

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AB - 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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