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.

本研究的目的是通过麦克斯韦位移电流（MDC）和光学二次谐波产生（SHG）测量来表征有机单层膜的线性和非线性介电性质。宏观介电性质如线性和非线性介电常数与组成分子的取向有序参数密切相关。从这个角度来看，这项调查已经进行了研究人员提出的MDC测量与SHG测量相结合的想法的基础上。（1）将界面单分子膜视为柔性体系。界面的存在限制了分子的方向，从而诱导出自发极化和非线性极化等特殊极化。我们调查这样的极化来评估系统的灵活性。我们可以找到薄膜的柔韧性和它们的电性能之间的关系。(2)We使用棒状液晶分子、生物分子、手性螺旋分子和光异构体。形成这些分子的朗缪尔单层，并测量MDC和SHG。根据MDC和SHG的测量结果，我们可以揭示单分子膜的几何结构和电子结构。特别是，我们成功地再现了水表面上的分子域的图案形成。（3）对于有机场效应晶体管和有机电致发光器件，我们提出了新的器件电场分布测量技术和载流子运动探测技术。此外，我们提出了一个模型，它描述了有机场效应晶体管的工作的麦克斯韦瓦格纳分析的基础上。

项目成果

Investigation of the Electrostatic Phenomena at Pentacene/Metal Interface by Second-Harmonic Generation

• DOI: 10.1143/jjap.44.2818
• 发表时间: 2005-04
• 期刊: Japanese Journal of Applied Physics
• 影响因子: 1.5
• 作者: T. Manaka;Yuuma Suzue;M. Iwamoto

Universal characteristics and function-control of nanostructured material

纳米结构材料的普遍特性和功能控制

• 发表时间: 2006
• 期刊: Thin Solid Films 509
• 作者: Yoshitake Yamazaki;Zhong-can Ou-yang et al.
• 通讯作者: Zhong-can Ou-yang et al.

Electrostatic energies stored in dipolar films and analysis of decaying process of a large surface potential of Alq3 films

偶极薄膜中储存的静电能及Alq3薄膜大表面电位的衰减过程分析

• 发表时间: 2006
• 期刊: Chemical Physics Letters 430
• 作者: Norifumi Kajimoto;Takaaki Manaka;Mitsumasa Iwamoto
• 通讯作者: Mitsumasa Iwamoto

Yuuki erekutoronikusukaimennkikakougaku no tennkai,

Yuuki erekutoronikusukamennkikakougaku no tennkai，

• 发表时间: 2006
• 期刊: Oyo-Butsuri Vol.175
• 作者: T.Kanaya;M.Sakuraba;J.Murota;M.Iwamoto
• 通讯作者: M.Iwamoto

Enhancement of Surface Potential Buildup and Decay of Tris (8-quinolinato) aluminum Film Deposited on Ultraviolet/Ozone-Treated Gold Electrodes

紫外线/臭氧处理金电极上沉积的三（8-喹啉）铝膜表面电势积累和衰减的增强

• 发表时间: 2005
• 期刊: Japanese Journal of Applied Physics 44
• 作者: 田中政典;谷俊博;亀井健史;Norifumi Kajimoto
• 通讯作者: Norifumi Kajimoto