Polymer(Korea) (폴리머)

The Polymer Society of Korea (한국고분자학회)
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Pitch Variations in Cholesteric Liquid Crystal Film by Molecular Diffusion

분자 확산에 의한 콜레스테릭 액정 필름의 피치 변화

  • Kwon Young-Jin (Materials Research Center for Information Display, Kyung Hee University) ;
  • Lee Won-Ju (Materials Research Center for Information Display, Kyung Hee University) ;
  • Kim Beom-Kyung (Materials Research Center for Information Display, Kyung Hee University) ;
  • Kim In-Sun (I-components) ;
  • Song Ki-Gook (Materials Research Center for Information Display, Kyung Hee University)
  • 권영진 (경희대학교 영상정보소재기술 연구센터) ;
  • 이원주 (경희대학교 영상정보소재기술 연구센터) ;
  • 김범경 (경희대학교 영상정보소재기술 연구센터) ;
  • 김인선 (아이컴포넌트) ;
  • 송기국 (경희대학교 영상정보소재기술 연구센터)
  • Published : 2006.09.01
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Abstract

Due to their periodic helical structure, cholesteric liquid crystals (CLC) have a unique ability to selectively reflect visible light. CLC films reflecting a broad wavelength band were prepared by inducing a pitch gradient in CLC layers through a diffusion of small molecules and through a thermal mixing of cyclic siloxane CLC molecules with different pitch lengths. Various pitch gradients in the CLC cell were observed using UV/Vis spectrometer and SEM technique.

콜레스테릭 액정은 주기적인 나선구조 때문에 빛을 선택적으로 반사하는 특성을 보이는데, 반사파장 대역이 넓은 cholesteric liquid crystal(CLC) 필름을 서로 다른 피치를 가지는 두 cyclic siloxane CLC의 열확산이나 저분자 물질에 의한 확산을 이용하여 제조하였다. 확산에 의한 CLC 액정 셀 내에 형성된 다양한 CLC 피치 분포를 SEM으로 관찰하였고, UV/Vis spectrometer를 이용하여 CLC 피치 분포 변화를 조사하였다.

Keywords

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