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ABSTRACT
Vertical alignment of liquid crystals (LCs) was implemented by forming an in situ self-assembled molecular layer on hydrophilic indium tin oxide (ITO) electrodes. Improvement in hydrophilicity of the ITO electrode according to ultraviolet (UV) irradiation time was confirmed. The self-assembled molecular layer offered stable vertical alignment of nematic LCs via hydrogen bonding between 4´-heptylbiphenyl-4-carboxylic acid and the hydroxyl groups on the ITO surface. Further, the electro-optical property of the LC cell irradiated by UV light was investigated to confirm the improved performance of the LC device.
Funding
This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2014R1A1A2057947).