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Homogeneous Alignment Characteristics of Liquid Crystal Molecules on Solution-Derived Lanthanum Zinc Oxide Film with Ion-Beam Irradiation

이온빔 조사된 용액 공정 기반 LaZnO 박막 위 액정 분자의 수평 배향 특성

  • Received : 2019.06.11
  • Accepted : 2019.07.23
  • Published : 2019.09.01

Abstract

The alignment characteristics of liquid crystal (LC) molecules on a solution-derived lanthanum zinc oxide (LZO) film under ion-beam irradiation were demonstrated. Using the solution process, an LZO film was fabricated on the glass substrate and cured at $100^{\circ}C$. Afterwards, ion-beam irradiation was performed following the LC alignment method. Using this film, an LC cell was fabricated and the characteristics of the LC alignment were verified. Cross polarizing microscopy and the crystal rotation method were used to investigate the alignment state of the LC molecules on the LZO films. Furthermore, field emission scanning electron microscopy and X-ray photoelectron spectroscopy were used to explore the effect of the ion-beam irradiation on the LZO film. Through these, it was confirmed that the ion-beam irradiation induced surface modification, which demonstrated anisotropic physical and chemical surface characteristics. Due to this, uniform LC alignment was achieved. Finally, the residual DC and anchoring energy of the LC cell based on the LZO films were measured using a capacitance-voltage curve.

Keywords

References

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