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STUDY ON INFORMATION WRITING AND STORAGE BY ELECTRON,PHOTON AND HEAT MODES FOR (POLYMER/LIQUID CRYSTAL) COMPOSITE FILMS

(聚合物/液晶)复合薄膜电子、光子和热模式信息写入与存储的研究

基本信息

批准号：
05453153
负责人：
KAJIYAMA Tisato
金额：
$ 5.38万
依托单位：
KYUSYU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1994
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05453153/
关键词：
LIQUID CRYSTAL INFORMATION WRITING INFORMATION STORAGE SMECTIC PHASE LIGHT SWITCHING 高分子液晶光記録

项目摘要

(1) Preparation and thermal property of (polymer/liquid crystal) composite filmTernary composite films consisting of a liquid crystalline polymer, a low molecular weight liquid crystal and a photoresponsive liquid crystal were prepared by a solvent cast method. DSC,polarizing optical microscopic and X-ray diffraction studies were performed for (polymer/liquid crystal) composite films with various composite fraction. Based on the phase diagrams, the smectic phase in which electron, photon and thermal writing could be carried out was identified.(2) Electric, optical and thermal response of the composite filmThe kinetics of the photoisomerization of the photoresponsive molecules depending on the wavelength and intensity of the irradiated light was evaluated based on the visibleultraviolet spectroscopy of the composite film. The optimum condition of photon mode writing was determined.(3) Light switching measurementsThe light scattering-transparent switching characteristics were evaluated for the composite films sandwiched between two transparent electrodes. The photo-irradiation dependence of the critical frequency from the light scattering state to the transparent state was investigated.(4) Optical writing and erasingThe critical frequencies upon irradiations of two kinds of wavelength were measured. The light scattering-transparent switching properties driven by a light irradiation and an electric field application were evaluated. Based on above results, writing, storaging and erasing of the digital information by electron, photon and heat modes were achieved.

(1)（聚合物/液晶）复合膜的制备及热性能用溶剂浇铸法制备了由液晶聚合物、低分子量液晶和光敏液晶组成的三元复合膜。采用DSC、偏光显微镜和X-射线衍射等方法对不同配比的聚合物/液晶复合膜进行了研究。根据相图确定了近晶相，在近晶相中可以进行电子、光子和热写入。(2)复合膜的电学、光学和热学响应基于复合膜的可见-紫外光谱，评价了光响应分子的光致异构化动力学随照射光的波长和强度的变化。确定了光子模式写入的最佳条件。(3)光开关的测量对夹在两个透明电极之间的复合膜的光散射-透明开关特性进行了评价。研究了从光散射态到透明态的临界频率随光辐照的变化关系。(4)光写入和擦除实验测量了两种波长辐照下的临界频率。通过光照射和电场应用驱动的光散射透明开关特性进行了评价。在此基础上，实现了电子、光子和热模式下数字信息的写入、存储和擦除。