AFM을 이용한 수직배향막 폴리머 표면위의 액정배향에 관한 연구 = Study on the LC Alignment on Vertically Alignment Polymer Surface using the AFM

다국어 초록 (Multilingual Abstract)

We have studied the alignment of liquid crystals (LCs) on homeotropic polymeric surface that is scanned using an atomic force microscope (AFM) tip by optical polarizing microscopy and computer simulation. The scanned areas on one substrate are 5 ㎛ × 5 ㎛, 10 ㎛ × 10 ㎛, and 20 ㎛ × 20 ㎛ and this substrate is assembled to another substrate coated with homeotropic polymer. The fabricated micro-LC cell using two substrates does not show any hysteresis and disclination lines inside the nano-rubbing areas, while changing voltage up and down. This indicates that the pretilt angle exists in the areas, thereby forming a hybrid LC configuration. From the experimental and computer simulation results, we can understand that the AFM rubbing clearly changes surface status of homeotropic alignment layer and causes the pretilt angle to an initial scanning direction.

목차 (Table of Contents)

• 목차 = ⅰ
• Abstract = ⅴ
• 제1장 서론 = 1
• 제2장 액정 배향 기술 현황 = 3
• 2.1 러빙법 = 3
• 2.2 광배향법 = 5
• 2.3 기타 배향법 = 7
• 2.3.1 계면활성제법 = 7
• 2.3.2 SiO 경사증착법 = 7
• 2.3.3 인상법, LB 법 = 7
• 제3장 연구동향 = 8
• 3.1 Nano-size waveguide의 제작 = 8
• 3.2 중간계조가 가능한 고화질 액정디스플레이 = 12
• 3.3 AFM nano-rubbing법을 사용한 폴리머 표면위의 액정 배향 연구 = 16
• 제4장 실험내용 및 결과 = 21
• 4.1 실험내용 = 21
• 4.1.1 Materials for Experiments = 21
• 4.1.2 Apparatus = 21
• 4.1.3 Cell Fabrication = 21
• 4.2 결과 및 고찰 = 26
• 제5장 결론 = 41
• 참고문헌 = 42