Vertical alignment of liquid crystals on a fully oxidized HfO2 surface by ion bombardment

Won Kyu Lee, Byeong Yun Oh, Ji Hun Lim, Hong Gyu Park, Byoung Yong Kim, Hyun Jae Na, Dae Shik Seo

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

High-performance liquid crystals (LCs) driven at a 0.9 V threshold were demonstrated on very thin HfO2 films with vertical (homeotropic) alignment by ion bombardment. Atomic layer deposition was used to obtain LC orientation on ultrathin high-quality films of double-layer HfO2 / Al2 O3. X-ray photoelectron spectroscopy indicated that full oxidization of HfO2 film surfaces was induced by ion bombardment, shifting the Hf 4f spectra to lower binding energies. The increased intensities of the Hf 4f peaks after ion bombardment confirmed that nonstoichiometric HfOx was converted to the fully oxidized HfO2 surfaces.

Original languageEnglish
Article number223507
JournalApplied Physics Letters
Volume94
Issue number22
DOIs
Publication statusPublished - 2009 Jun 15

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Fingerprint Dive into the research topics of 'Vertical alignment of liquid crystals on a fully oxidized HfO<sub>2</sub> surface by ion bombardment'. Together they form a unique fingerprint.

  • Cite this