Physicochemically constructed zinc oxide and UV-curable polymer hybrid films for liquid crystal system

Dong Hyun Kim, Ju Hwan Lee, Dong Wook Lee, Jin Young Oh, Jonghoon Won, Dae Shik Seo

Research output: Contribution to journalArticlepeer-review


UV-nanoimprint lithography was performed with zinc oxide (ZnO) solution and a UV-curable polymer. The UV-curing time was 2, 4, or 6 min, after which the surfaces of the films were analyzed. Atomic force microscopy of the physical characteristics of the surfaces revealed that the clearest pattern was attained on the 6 min UV-cured film. Moreover, X-ray photoelectron spectroscopy analysis confirmed that varying the UV exposure time changed the composition of atoms and bonds on the surfaces of the films. Light transmittance measurements of the patterned ZnO hybrid films show that they all exhibited sufficient transmittance. To investigate the liquid crystal (LC) orientation, LC cells were fabricated with the various films into antiparallel structures. Polarized light microscopy confirmed stable LC alignment while a stable transmittance curve based on pretilt angle measurements was observed in LC cells fabricated with hybrid films exposed to UV light for more than 4 min. The relationship between the height of the groove pattern in the film and the alignment of the LC molecules was analyzed by using Berreman's model.

Original languageEnglish
Article number119155
JournalJournal of Molecular Liquids
Publication statusPublished - 2022 Jul 1

Bibliographical note

Publisher Copyright:
© 2022 Elsevier B.V.

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Materials Chemistry


Dive into the research topics of 'Physicochemically constructed zinc oxide and UV-curable polymer hybrid films for liquid crystal system'. Together they form a unique fingerprint.

Cite this