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Orientation Control of Organic Conductor Thin Films by Magnetic Field

磁场控制有机导体薄膜的取向

基本信息

批准号：
12640551
负责人：
YOSHIMOTO Noriyuki
金额：
$ 1.34万
依托单位：
Iwate University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2001
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12640551/
关键词：
organic thin film orientation control magnetic filed organic conductors molecular design 分子デバイス

项目摘要

Although well-oriented thin films of organic conductors are demanded for progress in molecular electronic devices, the orientation control of thin films of organic conductors have not been accomplished. The difficulty in the structural analysis of organic thin films is one of the bottlenecks to obtain the well-oriented organic conducting thin films. In this study, we have precisely determined the in-plane orientations of the epitaxial thin films of BEDT-TTF, perylene and p-sexiphenyl formed on the KCl (001) NaCl, and KBr (001) by using X-ray diffraction. In-plane crystal orientations of eptaxial organic thin films were investigated using a newly developed X-ray diffractometer. Organic materials was deposited onto KCl, NaCl and KBr substrates in vacuum. The obtained thin films were analyzed by using the X-ray difrractometer. The theta/2thata symmetry scan suggested that BEDT-TTF crystals in the thin films oriented in the relation of (10-2) BEDT-TTF // (001) KCl. Using this information, 03-2 asymmetry reflections that include the information of the in-plane orientations were searched as a function of rotation angle (φ) of a normal vector to the substrate surface (Fig.1). Consequently, the 03-2 reflections were successfully measured. From the measured directions of the diffraction vectors, it was determined that the in-plane epitaxial relationship of BEDT-TTF and KCl substrate is <211>_<BEDT-TTF> // <110>_<KCl>. The effects of magnetic filed on in-plane orientation of organic films were also examined.

尽管分子电子器件的发展需要良好取向的有机导体薄膜，但有机导体薄膜的取向控制尚未实现。有机薄膜结构分析的困难是获得取向性好的有机导电薄膜的瓶颈之一。在这项研究中，我们精确地确定了BEDT-TTF，二萘嵌苯和p-sexiphenyl外延薄膜的KCl（001）NaCl，和KBr（001）的平面取向，通过使用X射线衍射。用新研制的X射线衍射仪研究了外延有机薄膜的面内晶体取向。在真空中将有机材料沉积到KCl、NaCl和KBr衬底上。通过使用X射线衍射仪分析所获得的薄膜。θ/2 thata对称扫描表明，薄膜中BEDT-TTF晶体的取向关系为（10-2）BEDT-TTF //（001）KCl。使用该信息，搜索包括面内取向信息的03-2不对称反射作为基底表面的法向矢量的旋转角（φ）的函数（图1）。因此，成功测量了03-2反射。从衍射矢量的测量方向确定了BEDT-TTF与KCl衬底的面内外延关系为<211>_<BEDT-TTF>//<110>_<KCl>。研究了磁场对有机薄膜面内取向的影响。