서지주요정보
강유전성 액정 셀의 가공과 전기 광학 특성 = Fabrication of ferroelectric liquid crystal cells and their electro-optical characteristics
서명 / 저자 강유전성 액정 셀의 가공과 전기 광학 특성 = Fabrication of ferroelectric liquid crystal cells and their electro-optical characteristics / 남호성.
저자명 남호성 ; Nam, Ho-Seong
발행사항 [대전 : 한국과학기술원, 1993].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8003878

소장위치/청구기호

학술문화관(문화관) 보존서고

MCHE 93026

휴대폰 전송

도서상태

이용가능

대출가능

반납예정일

초록정보

Ferroelctric liquid crystals of chiral smectic C ($Sc^*$) have been payed a significant attention because of their possible application to the high speed switching devices. Though the bulk $Sc^*$ phase has zero value of average spontaneous polarization along the axis, the surface force in a thin cell, imposed by the alignment layers, would be strong enough to suppress the helical structure. Among the material constnats in ferroelectric $Sc^*$ phase, the transition temperature, the apparent tilt angle, the helical pitch, and the spontaneous polarizatioare impoant parameters in fabrication. The example cells of DOBAMBC, and ZLI-4654 were fabricated with surface treated by rubbing polyimide thin film in the range of the cell thickness 2㎛ - 100 ㎛. The transition temperatures of $S_A$ to $Sc^*$ were determined under the optical microscope by applying electric field. The transition temperatures of liquid crystals within the cell treated by polyimide film, showed little lower values than those treated with silicon monooxide or without surface treatment in all cells. The spontaneous polarizations were measured by the triangular wave method in the variation of the cell thickness, the change of temperatures and the frequencies. As the cell thickness became thinner, the apparent tilt angle and spontaneous polarization increased, but the transition temperature of $S_A$ to $Sc^*$ decreased. In addition, the helical structure was not developed in the thin cell. In a thin cell, it is believed because molecular dipoles were ordered along the one direction, and therefore the medium became ferroelectric. Finally, the observed spontaneous polarization was reduced along with frequencies and temperatures.

서지기타정보

서지기타정보
청구기호 {MCHE 93026
형태사항 xi, 82 p. : 삽도, 사진 ; 26 cm
언어 한국어
일반주기 부록 수록
저자명의 영문표기 : Ho-Seong Nam
지도교수의 한글표기 : 김종득
지도교수의 영문표기 : Jong-Duk Kim
학위논문 학위논문(석사) - 한국과학기술원 : 화학공학과,
서지주기 참고문헌 : p. 70-75
주제 Liquid crystals.
Ferroelectric crystals.
액정. --과학기술용어시소러스
강유전체. --과학기술용어시소러스
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