Sturcture and Properties of Ferroelectric Liquid Crystals
Sturcture and Properties of Ferroelectric Liquid Crystals
批准号:
61302031
负责人:
FUKUDA Atsuo
金额:
$3.97万
依托单位国家:
日本
项目类别:
Grant-in-Aid for Co-operative Research (A)
财政年份:
1986
资助国家:
日本
项目状态:
已结题
起止时间:
1986 至 1987
中文摘要
小林研究了交流电场稳定、聚酰亚胺Langmuir-Blodgett薄膜对FLC取向的影响,以及电荷转移复合物对FLC主体的掺杂效应。Uchida描述了FLC在铁电陶瓷板上的取向技术,阐明了FLC的均匀分子取向机制,找到了合适的参数来评估摩擦表面的取向能力。Onnagawa和Miyashita也试图通过使用几种聚合物薄膜和倾斜蒸发的薄层来实现稳定可靠的分子取向,Komura用X射线衍射研究了近晶层,注意到了“人字形结构”。Akahane考虑了极化电荷的影响,分析了开关过程。Ishibashi研究了各向异性介电常数对高场区开关特性的影响,并根据新提出的模型分析了开关时间与场的关系。Takazoe和Fukuda阐明了锯齿形缺陷以及内部向错环的结构。他们还发现,第三种均匀状态,即极化平行于边界表面,由于极化电荷和V形结构而稳定。Kai和Imasaki研究了SX相畴反转的成核过程,认为该过程是高度各向异性的准一维成核过程。Kusabayashi系统地合成了几种化合物,并试图阐明SC* 相的出现与分子结构之间的关系。木村发展了一种分子理论,解释了为什么在SC相中分子长轴从层法线倾斜的原因。Maruyama通过使用测量高频介电常数的复杂技术研究了分子绕长轴的旋转状态。
英文摘要
Kobayashi studied AC electric field stabilization, polyimide Langmuir-Blodgett films for the orientation of FLC, and the doping effects of a charge transfer complex into FLC host. Uchida descibed an alignment technique of FLC on a ferroelectric ceramic plate and clarified the mechanism of homogeneous molecular alignment of FLC, finding a suitable parameter to evaluate the alignment power of the rubbed surface. Onnagawa and Miyashita also tried to realizestable and reliable molecular alignment by using several polymer films and obliquely evaporated thin layers.Komura studied the smectic layer by X ray diffraction and noticed the "chevron structure". Taking account of the effect of polarization charge, Akahane analized the switching process. Ishibashi inverstigated the effect of anisotropicdielectric constant on the switching characteristics in a high field region andanalized the field dependence of switching time in terms of a newly proposed model. Takazoe and Fukuda clarified the structure of zig-zag defects as well internal disclination loops. They also discovered that the third uniform state, where the polsrization is parallel to the bounding surfaces, is stabilized becauseof the polarization charge and the chevron structure. Kai and Imasaki studiedthe nucleation process in domain reversal of the SX phase and concluded that the process is highly amisotropic and quasi one dimensional.In the chemistry oriented fields of research, the structure and properties ofFLC cells has been studied from a microscopic point of view. Kusabayashi systematically synthesized several coumpounds and tried to clarify the relation between the appearance of the SC* phase and the molecular structure. Kimura developed a molecular theory, explaining the reason why the molecular long axis tilts from the layer normal in the SC phase. Maruyama investigated the state of rotation around the molecular long axis by using a sophisticated techniwue in measuring high frequency dielectric constants.
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H. Suenaga, S. Maeda, T. Iijima and S. Kobayashi: "AC Field and Ferequency-Controlled Electrooptic Switching Using A Phrimidine Type Ferroelectric Liquid Crystal" Mol. Cryst. & Liq. Cryst. 144[-]. 191-198 (1987)
H. Suenaga、S. Maeda、T. Iijima 和 S. Kobayashi:“使用嘧啶型铁电液晶进行交流场和频率控制的电光开关”Mol。
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H.Kimura and H.Nakano: J.Phys.Soc.Japan. 55.No.12. 4186-4193 (1986)
H.Kimura 和 H.Nakano:J.Phys.Soc.Japan。
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Y.Matsuda and M.Yamashita: Prog.theor.Phys.73,No.5. 1261-1263 (1985)
Y.Matsuda 和 M.Yamashita:Prog.theor.Phys.73,No.5。
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M.Yamashita: Prog.Theor.phys.74,No,3. 622-625 (1985)
M.Yamashita:Prog.Theor.phys.74,No,3。
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K. Nakao, M. Ozaki and K. Yoshino: "Reversal of Spontaneous Polarization Direction in Ferroelectric Liquid Crystal with Temperature" Jpn. J. Appl. Phys.Suppl. 26-2[-]. 104-106 (1987)
K. Nakao、M. Ozaki 和 K. Yoshino:“铁电液晶中自发极化方向随温度的反转”Jpn。
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