Titanium dioxide surface modification via ion-beam bombardment for vertical alignment of nematic liquid crystal

Hyun Jae Na; Jin Woo Lee; Won Kyu Lee; Ji Hun Lim; Hong Gyu Park; Byoung Yong Kim; Jeong Yeon Hwang; Jeong Min Han; Dae Shik Seo

doi:10.1364/OL.35.001151

Titanium dioxide surface modification via ion-beam bombardment for vertical alignment of nematic liquid crystal

Hyun Jae Na, Jin Woo Lee, Won Kyu Lee, Ji Hun Lim, Hong Gyu Park, Byoung Yong Kim, Jeong Yeon Hwang, Jeong Min Han, Dae Shik Seo

Department of Electrical and Electronic Engineering

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

7 Citations (Scopus)

Abstract

We introduce the characteristics of the titanium dioxide (TiO₂) inorganic film deposited by rf magnetron sputtering for liquid crystal display applications. The TiO₂ films demonstrated vertical alignment (VA) of the liquid crystals (LCs) obtained by using ion-beam (IB) bombardment. As observed by using x-ray photo- electron spectroscopy, the chemical structure of the TiO₂ was changed by IB bombardment, altering the Ti-O bonding of the Ti 2p spectra to lower intensity levels. Breaking Ti-O bonding by IB bombardment created pretilt angles between the TiO₂ film and LC molecules. The better voltage-transmittance characteristics of the VA LCDs based on TiO₂ film were measured and compared with the same characteristics of polyimide film.

Original language	English
Pages (from-to)	1151-1153
Number of pages	3
Journal	Optics Letters
Volume	35
Issue number	8
DOIs	https://doi.org/10.1364/OL.35.001151
Publication status	Published - 2010 Apr 15

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics

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10.1364/OL.35.001151

Cite this

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title = "Titanium dioxide surface modification via ion-beam bombardment for vertical alignment of nematic liquid crystal",

abstract = "We introduce the characteristics of the titanium dioxide (TiO2) inorganic film deposited by rf magnetron sputtering for liquid crystal display applications. The TiO2 films demonstrated vertical alignment (VA) of the liquid crystals (LCs) obtained by using ion-beam (IB) bombardment. As observed by using x-ray photo- electron spectroscopy, the chemical structure of the TiO2 was changed by IB bombardment, altering the Ti-O bonding of the Ti 2p spectra to lower intensity levels. Breaking Ti-O bonding by IB bombardment created pretilt angles between the TiO2 film and LC molecules. The better voltage-transmittance characteristics of the VA LCDs based on TiO2 film were measured and compared with the same characteristics of polyimide film.",

author = "Na, {Hyun Jae} and Lee, {Jin Woo} and Lee, {Won Kyu} and Lim, {Ji Hun} and Park, {Hong Gyu} and Kim, {Byoung Yong} and Hwang, {Jeong Yeon} and Han, {Jeong Min} and Seo, {Dae Shik}",

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AU - Na, Hyun Jae

AU - Lee, Jin Woo

AU - Lee, Won Kyu

AU - Lim, Ji Hun

AU - Park, Hong Gyu

AU - Kim, Byoung Yong

AU - Hwang, Jeong Yeon

AU - Han, Jeong Min

AU - Seo, Dae Shik

PY - 2010/4/15

Y1 - 2010/4/15

N2 - We introduce the characteristics of the titanium dioxide (TiO2) inorganic film deposited by rf magnetron sputtering for liquid crystal display applications. The TiO2 films demonstrated vertical alignment (VA) of the liquid crystals (LCs) obtained by using ion-beam (IB) bombardment. As observed by using x-ray photo- electron spectroscopy, the chemical structure of the TiO2 was changed by IB bombardment, altering the Ti-O bonding of the Ti 2p spectra to lower intensity levels. Breaking Ti-O bonding by IB bombardment created pretilt angles between the TiO2 film and LC molecules. The better voltage-transmittance characteristics of the VA LCDs based on TiO2 film were measured and compared with the same characteristics of polyimide film.

AB - We introduce the characteristics of the titanium dioxide (TiO2) inorganic film deposited by rf magnetron sputtering for liquid crystal display applications. The TiO2 films demonstrated vertical alignment (VA) of the liquid crystals (LCs) obtained by using ion-beam (IB) bombardment. As observed by using x-ray photo- electron spectroscopy, the chemical structure of the TiO2 was changed by IB bombardment, altering the Ti-O bonding of the Ti 2p spectra to lower intensity levels. Breaking Ti-O bonding by IB bombardment created pretilt angles between the TiO2 film and LC molecules. The better voltage-transmittance characteristics of the VA LCDs based on TiO2 film were measured and compared with the same characteristics of polyimide film.

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Titanium dioxide surface modification via ion-beam bombardment for vertical alignment of nematic liquid crystal

Abstract

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