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Electrical properties and microscopic behavior of molecules in Langmuir

Langmuir 分子的电学性质和微观行为

基本信息

批准号：
03650249
负责人：
KANEKO Futao
金额：
$ 1.34万
依托单位：
Niigata University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1992
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03650249/
关键词：
Langmuir-Blodgett films LB film adsorbing dyes alternate-layer LB film photoisomerization ultrathin film device conduction current dipolar polarization ヘテロ構造LB膜多重分子メモリ-

项目摘要

Electrical properties and microscopic behavior of molecules are investigated for various Langmuir-Blodgett films. 1,Spontaneous currents of alternate-layer LB filmsSpontaneous currents are observed in the alternate layer LB films of merocyanine (MC) and arachidic acid. The currents are related to the orientations, the J aggregate and microscopic behavior of the MC molecules in the LB films. Furthermore,large spontaneous currents are obtained from a high speed measurement using IR lamp. 2,Electrical properties of LB films adsorbing cyanine dyesLB films adsorbing cyanine dyes are fabricated using the adsorption LB method from subphase containing various concentrations of the dyes. Adsorption and aggregates of the dyes in LB films are observed using optical reflection and absorption measurements. The electrical properties are investigated for the sandwich structure devices using TSC and conduction measurements. Remarkable increases of TSCs and conduction currents are observed for the devices with the dyes. 3,Ordered structure and electrical properties of spiropyran LB filmsOrdered structure and electrical properties are investigated for spiropyran LB films. Dipolar depolarization currents exhibit reversible changes caused by the isomerization between the spiropyran type and the photo-merocyanine type. The properties depend upon the ordered structure of the LB films. 4,Ultrathin film devices using microscopic behavior of organic moleculesNew ultrathin film devices, i.e.a memory and/or a sensor, are proposed using micoscopic behavior of organic molecules. Writing and reading of signals are simulated for the memory device, and the fundamental properties are examined for phosphatidic acid LB film devices.

研究了各种Langmuir-Blodgett薄膜分子的电学性质和微观行为。1、交替层LB膜的自发电流merocyanine （MC）和花生酸的交替层LB膜中观察到自发电流。这些电流与LB膜中MC分子的取向、J聚集体和微观行为有关。此外，利用红外光进行高速测量，获得了较大的自发电流。2、吸附菁染料的LB膜的电学性能采用吸附LB法从含有不同浓度染料的亚相制备了吸附菁染料的LB膜。利用光学反射和吸收测量，观察了LB膜中染料的吸附和聚集。利用TSC和电导率测量对夹层结构器件的电学性能进行了研究。实验结果表明，加入染料后，器件的tsc和传导电流显著增加。研究了螺吡喃LB膜的有序结构和电性能。偶极去极化电流表现出由螺吡喃型和光merocyanine型之间的异构化引起的可逆变化。其性能取决于LB膜的有序结构。4、利用有机分子微观行为的超薄膜器件利用有机分子的微观行为，提出了新的超薄膜器件，即存储器和/或传感器。模拟了存储器件的信号写入和读取过程，研究了磷脂酸LB薄膜器件的基本特性。