Study on the choresteric-smectic isothermal phase transition inducedby application of electric field

电场诱导的列构-近晶等温相变研究

• 批准号: 19350096
• 负责人: SASAKI Takeo
• 金额: $ 12.56万
• 依托单位: Tokyo University of Science
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2007
• 资助国家: 日本
• 起止时间: 2007 至 2009
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-19350096/
• 关键词: 液晶材料; 素子; 強誘電性液晶; コレステリック相; 電界誘起相転移; 自発分極; 3状態間スイッチング; 高分子安定化

A series of cholesteric liquid crystals possessing three ring structure as a mesogenic unit was synthesized. The liquid crystal exhibited an isothermal phase transition from planer phase to focal conic phase when an electric field was applied to the LC. The focal conic phase showed electro optical switching. The response time of the electro optical switching was about 600 micro s. The focal conic phase exhibited a spontaneous polarization of 5nC/cm^2. Those results indicate that the focal conic phase was a ferroelectric phase. Thus, It was shown that the cholesteric LC synthesized in this study exhibits isothermal phase transition from cholesteric phase to ferroelectric phase. The cholesteric LC shows three-states electro optical switching under application of electric field.

合成了一系列以三环结构为介晶基元的胆甾型液晶。在外加电场的作用下，液晶呈现从平面相到焦点二次相的等温相变。焦锥相位表现为电光开关。电光开关的响应时间约为600微米S，焦锥相位的自发极化为5nC/cm~2。这些结果表明焦锥相位是铁电相。结果表明，本研究合成的胆甾相液晶具有从胆甾相到铁电相的等温相变。胆甾型液晶在电场作用下表现为三态电光开关。

项目成果

自己組織化ハンドブック複合材料-有機フォトリフラクティブマテリアル

自组装复合材料手册-有机光折变材料

• 发表时间: 2009
• 作者: Naoko Ichieda;Tetsuya Kamimura;Yuko Wasada-Tsutsui;Yasuhiro Funahashi;Tomohiro Ozawa;Koichiro Jitsukawa;Hideki Masuda;佐々木健夫
• 通讯作者: 佐々木健夫

Photorefractive Effect of Ferroelectric Liquid Crystals with Application of Alternating Electric field

交变电场下铁电液晶的光折变效应

• 发表时间: 2007
• 期刊: J. Phys. Chem. C 111
• 作者: T. Sasaki;N. Moriya;Y. Iwasaki
• 通讯作者: Y. Iwasaki

等温的コレステリックースメクチック電界誘起相転移

等温胆甾-近晶场诱导相变

• 发表时间: 2007
• 作者: 赤堀陽介;佐々木健夫
• 通讯作者: 佐々木健夫

Influence of Rubbing Condition of Polyimide Alignment Layer on Optical Anisotropy of Immobilized Liquid Crystal Film

聚酰亚胺配向层摩擦条件对固定液晶膜光学各向异性的影响

• 发表时间: 2007
• 期刊: Liq. Cryst. 34
• 作者: M.Yamahara;M.Nakamura;N.Koide;T.Sasaki
• 通讯作者: T.Sasaki

Photorefractive Effect of Polymer-Stabilized Ferroelectric Liquid Crystals

聚合物稳定铁电液晶的光折变效应

• 发表时间: 2009
• 期刊: J. Phys. Chem. C 113
• 作者: T. Sasaki;Y. Nakazawa
• 通讯作者: Y. Nakazawa