CHARATRETIZATION OF FLEXIBLE NANO INTERFACIAL FILM BY MEANS OF MAXWELL DISPLACEMENT CURRENT AND OPTICAL SECOND HARMONIC GENERATION

柔性纳米界面膜的麦克斯韦位移电流和光学二次谐波表征

• 批准号: 15206032
• 负责人: IWAMOTO Mitsumasa
• 金额: $ 30.95万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15206032/
• 关键词: Monolayer; Maxwell displacement current; Optical second harmonic generation; Flexibility; Electro-static phenomena; Nano interface; Organic FET; Domain Pattern

The purpose of this investigation was to characterize the linear and nonlinear dielectric properties of organic monolayer films by means of Maxwell-displacement current (MDC) and optical Second Harmonics Generation (SHG) measurement. The macroscopic dielectric properties such as linear and nonlinear dielectric constants are strongly related to the orientational order parameters of the constituent molecules. From this point of view, this investigation has been carried out on the basis of the idea of MDC measurement coupled with SHG measurement, proposed by the investigators.(1)Interfacial monolayer was treated as a flexible system. Direction of molecules is restricted by the presence of interface, and thus the specific polarizations such as spontaneous polarization and nonlinear polarization are induced. We investigate such polarization to evaluate the flexibility of the system. We can find the relationship between flexibility of films and the electrical property of them.(2)We used rod-like liquid crystalline molecules, biological molecules, chiral helix molecules and photo-isomers. Langmuir monolayers of these molecules were formed and measure the MDC and SHG. According to the result obtained from the MDC and SHG measurement, we can reveal the geometrical and electronic structure of monolayers. In particular, we successfully reproduce the pattern formation of molecular domains on a water surface.(3)For organic devices, such as organic field effect transistor and organic electro luminescent devices, we propose novel techniques for evaluating the electric field distribution in the devices and for probing the carrier motion in the devices. Also, we proposed a model which describes the operation of the organic field effect transistors on the basis of Maxwell-Wagner analysis.

这项研究的目的是表征有机单层膜的线性和非线性介电特性，即Maxwell-Displacement电流（MDC）和光学第二次谐波（SHG）测量。宏观介电特性（例如线性和非线性介电常数）与组成分子的定向阶参数密切相关。从这个角度来看，该研究是根据研究人员提出的MDC测量与SHG测量的想法进行的。（1）界面单层被视为柔性系统。分子的方向受界面的存在限制，因此诱导了特定的极化（例如自发极化和非线​​性极化）。我们研究了这种极化以评估系统的灵活性。我们可以找到膜的柔韧性与它们的电性能之间的关系。（2）我们使用了类似杆状液晶分子，生物分子，手性螺旋分子和光合体。形成了这些分子的Langmuir单层，并测量MDC和SHG。根据从MDC和SHG测量中获得的结果，我们可以揭示单层的几何和电子结构。特别是，我们成功地重现了水面上分子结构域的模式形成。（3）对于有机设备，例如有机场效应晶体管和有机电力发光设备，我们提出了新的技术，用于评估设备中的电场分布以及设备中的载体运动。另外，我们提出了一个模型，该模型描述了有机场效应晶体管的运行，该模型是根据Maxwell-Wagner分析的。

项目成果

Orientational order in binary mixtures of hard Gaussian overlap molecules

硬高斯重叠分子二元混合物中的取向顺序

• 发表时间: 2004
• 期刊: Journal of Chemical Physics Vol. 120, No. 4
• 作者: 川邉瑠美子;前原恵二;木村洋;小峯裕己;Xin Zhou
• 通讯作者: Xin Zhou

Detection of nano-interfacial space charge field at metal-organic film interface by SHG and surface potential

利用SHG和表面电位检测金属-有机薄膜界面纳米界面空间电荷场

• 发表时间: 2005
• 期刊: Current Applied Physics 5
• 作者: Y.Shimada;K.Hirakawa;M.Odnoblioudov;K.A.Chao;Mitsumasa Iwamoto
• 通讯作者: Mitsumasa Iwamoto

In situ Observations of Orientational Ordering Process of 4'-n-pentyl-4-cyanobiphenyl Ultra-Thin Film Using Polarized Absorption Measurements

使用偏振吸收测量原位观察 4-正戊基-4-氰基联苯超薄膜的取向有序过程

• 发表时间: 2005
• 期刊: Japanese Journal of Applied Physics 44
• 作者: 原田隆郎;宮澤晋史;呉 智深;Dai Taguchi
• 通讯作者: Dai Taguchi

SHG and MDC spectroscopy of chiral organic monolayer at the air-water interface

空气-水界面手性有机单分子层的 SHG 和 MDC 光谱

• 发表时间: 2005
• 期刊: Colloids and Surfaces - A 257
• 作者: Takaaki Manaka

Nanometric Interfacial Polarization Phenomena in Organic Monolayer Films Studied by Maxwell Displacement Current-Second Harmonic Generation Snectroscopy

麦克斯韦位移电流-二次谐波发生显微镜研究有机单层薄膜中的纳米界面极化现象

• 发表时间: 2005
• 期刊: Japanese Journal of Applied Physics Vol.44, No.1B
• 作者: S.Kawata;A.Hirose;Y.Shimizu;Ryosuke Tamura
• 通讯作者: Ryosuke Tamura