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 journalArticle

4 Citations (Scopus)

Abstract

In this study, we explored the effects of ion beam (IB) bombardment on the orientation of liquid crystal (LC) molecules on Ta 2 O 5 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 Ta 2 O 5 surfaces, we concluded that increasing the IB irradiation time strengthened the anisotropic surface energy on the Ta 2 O 5 surfaces, and stable vertical LC alignment was achieved via the transformed surface energies.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume157
Issue number4
DOIs
Publication statusPublished - 2010 Mar 26

Fingerprint

Tantalum oxides
Liquid Crystals
Liquid crystals
Ion beams
Oxide films
Irradiation
Thin films
Processing
Interfacial energy
Molecules
Crystal orientation
Contact angle
X ray photoelectron spectroscopy
tantalum oxide

All Science Journal Classification (ASJC) codes

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

Cite this

Lee, Jin Woo ; Lim, Ji Hun ; Oh, Byeong Yun ; Kim, Young Hwan ; Park, Hong Gyu ; Kim, Byoung Yong ; Hwang, Jeong Yeon ; Ok, Chul Ho ; Moon, Byung Moo ; Seo, Dae-Shik. / Vertically aligned liquid crystals on tantalum oxide thin films using ion beam irradiation processing. In: Journal of the Electrochemical Society. 2010 ; Vol. 157, No. 4.
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Vertically aligned liquid crystals on tantalum oxide thin films using ion beam irradiation processing. / Lee, Jin Woo; Lim, Ji Hun; Oh, Byeong Yun; Kim, Young Hwan; Park, Hong Gyu; Kim, Byoung Yong; Hwang, Jeong Yeon; Ok, Chul Ho; Moon, Byung Moo; Seo, Dae-Shik.

In: Journal of the Electrochemical Society, Vol. 157, No. 4, 26.03.2010.

Research output: Contribution to journalArticle

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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

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