Low-Voltage driving of liquid crystals vertically aligned by ion-beam bombardment on high-k HfO2 surface

Lee Gon Kim, Won Kyu Lee, Byeong Yun Oh, Ji Hun Lim, Hyun Jae Na, Hong Gyu Park, Young Hwan Kim, Byoung Yong Kim, Young Ku Kang, Chul Ho Ok, Jeoung Yeon Hwang, Jeong Min Han, Dae Shik Seo

Research output: Contribution to journalArticle

Abstract

Ion-beam irradiation (IB) on HfO2 surface induced high-performance liquid crystal (LC) driving at a 1-V threshold with vertical alignment of liquid crystals (LC). The high-k materials Atomic layer deposition was used to obtain LC orientation on ultrathin and high-quality films of HfO2 layers. To analyze surface morphological transition of HfO2 which can act as physical alignment effect of LC, atomic force microscopy images are employed with various IB intensities. The contact angle was measured to elucidate the mechanism of vertical alignment of LC on HfO2 with IB irradiation. Contact angle measurements show the surface energy changes via IB intensity increasing.

Original languageEnglish
Pages (from-to)115-121
Number of pages7
JournalMolecular Crystals and Liquid Crystals
Volume529
DOIs
Publication statusPublished - 2010 Jan 1

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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    Kim, L. G., Lee, W. K., Oh, B. Y., Lim, J. H., Na, H. J., Park, H. G., Kim, Y. H., Kim, B. Y., Kang, Y. K., Ok, C. H., Hwang, J. Y., Han, J. M., & Seo, D. S. (2010). Low-Voltage driving of liquid crystals vertically aligned by ion-beam bombardment on high-k HfO2 surface. Molecular Crystals and Liquid Crystals, 529, 115-121. https://doi.org/10.1080/15421406.2010.495885