Vertically aligned liquid crystals on tantalum oxide thin films using ion beam irradiation processing

Jin Woo Lee; Ji Hun Lim; Byeong Yun Oh; Young Hwan Kim; Hong Gyu Park; Byoung Yong Kim; Jeong Yeon Hwang; Chul Ho Ok; Byung Moo Moon; Dae Shik Seo

doi:10.1149/1.3295696

Vertically aligned liquid crystals on tantalum oxide thin films using ion beam irradiation processing

Jin Woo Lee, Ji Hun Lim, Byeong Yun Oh, Young Hwan Kim, Hong Gyu Park, Byoung Yong Kim, Jeong Yeon Hwang, Chul Ho Ok, Byung Moo Moon, Dae Shik Seo

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

6 Citations (Scopus)

Abstract

In this study, we explored the effects of ion beam (IB) bombardment on the orientation of liquid crystal (LC) molecules on Ta₂ O₅ surfaces. Increasing the IB exposure time resulted in improved LC alignment characteristics. Through X-ray photoelectron spectroscopy analysis, it was also confirmed that IB irradiation caused Ta 4f and O 1s peak shifts in the positive direction. The breaking phenomenon of the O 1s bonds may cause anisotropic dipole-dipole forces to stably align the vertical LC molecules. Finally, measuring the contact angles on the IB irradiated Ta₂ O₅ surfaces, we concluded that increasing the IB irradiation time strengthened the anisotropic surface energy on the Ta₂ O₅ surfaces, and stable vertical LC alignment was achieved via the transformed surface energies.

Original language	English
Pages (from-to)	J107-J110
Journal	Journal of the Electrochemical Society
Volume	157
Issue number	4
DOIs	https://doi.org/10.1149/1.3295696
Publication status	Published - 2010

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Renewable Energy, Sustainability and the Environment
Surfaces, Coatings and Films
Electrochemistry
Materials Chemistry

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This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1149/1.3295696

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title = "Vertically aligned liquid crystals on tantalum oxide thin films using ion beam irradiation processing",

abstract = "In this study, we explored the effects of ion beam (IB) bombardment on the orientation of liquid crystal (LC) molecules on Ta2 O5 surfaces. Increasing the IB exposure time resulted in improved LC alignment characteristics. Through X-ray photoelectron spectroscopy analysis, it was also confirmed that IB irradiation caused Ta 4f and O 1s peak shifts in the positive direction. The breaking phenomenon of the O 1s bonds may cause anisotropic dipole-dipole forces to stably align the vertical LC molecules. Finally, measuring the contact angles on the IB irradiated Ta2 O5 surfaces, we concluded that increasing the IB irradiation time strengthened the anisotropic surface energy on the Ta2 O5 surfaces, and stable vertical LC alignment was achieved via the transformed surface energies.",

author = "Lee, {Jin Woo} and Lim, {Ji Hun} and Oh, {Byeong Yun} and Kim, {Young Hwan} and Park, {Hong Gyu} and Kim, {Byoung Yong} and Hwang, {Jeong Yeon} and Ok, {Chul Ho} and Moon, {Byung Moo} and Seo, {Dae Shik}",

year = "2010",

doi = "10.1149/1.3295696",

language = "English",

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journal = "Journal of the Electrochemical Society",

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T1 - Vertically aligned liquid crystals on tantalum oxide thin films using ion beam irradiation processing

AU - Lee, Jin Woo

AU - Lim, Ji Hun

AU - Oh, Byeong Yun

AU - Kim, Young Hwan

AU - Park, Hong Gyu

AU - Kim, Byoung Yong

AU - Hwang, Jeong Yeon

AU - Ok, Chul Ho

AU - Moon, Byung Moo

AU - Seo, Dae Shik

PY - 2010

Y1 - 2010

N2 - In this study, we explored the effects of ion beam (IB) bombardment on the orientation of liquid crystal (LC) molecules on Ta2 O5 surfaces. Increasing the IB exposure time resulted in improved LC alignment characteristics. Through X-ray photoelectron spectroscopy analysis, it was also confirmed that IB irradiation caused Ta 4f and O 1s peak shifts in the positive direction. The breaking phenomenon of the O 1s bonds may cause anisotropic dipole-dipole forces to stably align the vertical LC molecules. Finally, measuring the contact angles on the IB irradiated Ta2 O5 surfaces, we concluded that increasing the IB irradiation time strengthened the anisotropic surface energy on the Ta2 O5 surfaces, and stable vertical LC alignment was achieved via the transformed surface energies.

AB - In this study, we explored the effects of ion beam (IB) bombardment on the orientation of liquid crystal (LC) molecules on Ta2 O5 surfaces. Increasing the IB exposure time resulted in improved LC alignment characteristics. Through X-ray photoelectron spectroscopy analysis, it was also confirmed that IB irradiation caused Ta 4f and O 1s peak shifts in the positive direction. The breaking phenomenon of the O 1s bonds may cause anisotropic dipole-dipole forces to stably align the vertical LC molecules. Finally, measuring the contact angles on the IB irradiated Ta2 O5 surfaces, we concluded that increasing the IB irradiation time strengthened the anisotropic surface energy on the Ta2 O5 surfaces, and stable vertical LC alignment was achieved via the transformed surface energies.

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Vertically aligned liquid crystals on tantalum oxide thin films using ion beam irradiation processing

Abstract

ASJC Scopus subject areas

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