DEVELOPMENT OF A SYSTEM FOR CHARACTERIZATION OF LINEAR AND NONLINEAR DIELECTRIC PROPERTY OF NANOMETRIC ORGANIC THIN FILM

纳米有机薄膜线性和非线性介电性能表征系统的开发

• 批准号: 09555095
• 负责人: IWAMOTO Mitsumasa
• 金额: $ 8.06万
• 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 (B)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09555095/
• 关键词: Maxwell-displacement-current; Second Harmonic Generation; Dielectric Phenomena; Nonlinear Dielectrics; Organic monolayer; Liquid crystal; Order Parameter; relaxation time; Spectroscopy; 有機分子膜; 変位電流法; 理論解析; 誘電率; 双極子; 電気物性; 相転移; 非線型光学; 非線形光

The purpose of this investigation was to develop a measurement system used for the characterization of linear and nonlinear dielectric properties of organic monolayer films, and to measure Maxwell-displacement current (MDC) and Second Harmonics Generation (SHG) from monolayers on a water surface. Further to analyze monolayers based on a hardcore monolayer model was the purpose. Thus, this investigation has been carried out on the basis of the idea of Maxwell-displacement current measurement proposed by the investigators. The investigators analyzed the molecular motion of organic monolayer films using a rod-like polar molecular model, assuming the motion of molecules is ruled by the Boltzmann statistics. They theoretically derived dielectric relaxation time of monolayers and also analyzed the generation of MDC from chiral and achiral monolayers. They also analyzed the phase transition of monolayers and explained the chiral phase separation of mixed monolayers using a continuum theory. The relationship between the orientational order parameters, i.e., 1st 2nd and 3rd orientational order parameters, and the MDC and SHG signals were obtained. They also measured the MDC and SHG from 5CB liquid crystal monolayers. Further orientational transition process of LCs triggered by conformational change of azobenzene and the molecular motion of azobenzenes in mixed monolayer systems were analyzed based on a continuum theory, and the motion of LCs was discussed based on the simultaneous measurement of optical transmittance and the capacitanace.

这项研究的目的是开发一种用于表征有机单层膜的线性和非线性介电特性的测量系统，并测量从水面上单层中的麦克斯韦 - 置换电流（MDC）和第二谐波产生（SHG）。进一步分析基于铁杆单层模型的单层是目的。因此，这项研究是根据研究人员提出的麦克斯韦 - 位置电流测量的思想进行的。假设分子的运动由玻尔兹曼统计统治，研究人员使用棒状的极性分子模型分析了有机单层膜的分子运动。它们理论上衍生的单层介电松弛时间，还分析了手性和刺激单层的MDC产生。他们还分析了单层的相变，并使用连续理论解释了混合单层的手性相分离。获得了定向阶参数，即获得第1个第二和第三级阶阶参数与MDC和SHG信号之间的关系。他们还测量了5CB液晶单层的MDC和SHG。 LCS的进一步定向过渡过程是由偶氮苯构象变化触发的，基于连续理论分析了混合单层系统中偶氮苯的分子运动，并根据光学传播和capacitanace的同时测量LCS的运动讨论了LCS的运动。

项目成果

Yoko SATO, Chen-Xu WU, Yutaka MAJIMA and Mitsumasa IWAMOTO: "Determination of the piezoelectric coefficient of monolayers on water surface by Maxwell-displacement-current measurement"Jpn. J. Appl. Phys.. 37. 215-216 (1998)

Yoko SATO、Chen-Xu WU、Yutaka MAJIMA 和 Mitsumasa IWAMOTO：“通过麦克斯韦位移电流测量确定水面单层的压电系数”Jpn。

Wei Zhao, Chen-Xu, Mitsumasa IWAMOTO, Ou-Yang Zhong-can: "Modeling analysis of molecular chiral effect detected by Maxwell-displacement-current measurements"J. Chem. Phys.. 110. 12131-12140 (1999)

赵伟，徐晨，岩本光正，欧阳忠灿：“麦克斯韦位移电流测量检测分子手性效应的建模分析”。

Yoko Sato, Chen-Xu Wo, Yutaka Majima and Mitsumasa IWAMOTO: "Analysis of the Dielectric Relaxation Property of Phospholipid Monolayers by Maxwell Displacement Current Measurement"J. Colloid and Interface Science. 218. 118-121 (1999)

Yoko Sato、Chen-Xu Wo、Yutaka Majima 和 Mitsumasa IWAMOTO：“通过麦克斯韦位移电流测量分析磷脂单层的介电弛豫特性”J。

M. Iwamoto, A. Sugimura and Z. C. Ou-yang: "The behavior of the Maxwell displacement current for a biaxial model of monolayers at the liquid-air interface"Chem. Phys. Lett.. 274. 505-512 (1997)

M. Iwamoto、A. Sugimura 和 Z. C. Ou-yang：“液-气界面处单分子层双轴模型的麦克斯韦位移电流的行为”Chem.

C.X.Wu, Y.Mizutani and M.Iwamoto: "Analysis of Thermally Dielectric Relaxation Phenomena in Organic Monolayer Films by Debye Brownian Motion Equation" Jpn.J.Appl.Phys.36. 222-225 (1997)

C.X.Wu、Y.Mizutani 和 M.Iwamoto：“通过德拜布朗运动方程分析有机单层薄膜中的热介电弛豫现象”Jpn.J.Appl.Phys.36。