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.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Renewable Energy, Sustainability and the Environment
- Surfaces, Coatings and Films
- Materials Chemistry