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Analysis of Atomic Surface Structure Using In-Situ AFM

使用原位 AFM 分析原子表面结构

基本信息

批准号：
02555166
负责人：
ITAYA Kingo
金额：
$ 10.11万
依托单位：
Tohoku Univ.
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1991
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02555166/
关键词：
AFM STM Solid liquid interface Electrode surface

项目摘要

In-situ characterization of solid(electrode)/solution interfaces is of particularly importance in electrochemical processes occurring at these interfaces. Recently, our group and several other groups have achieved atomic images of some metals or semiconductors at the electrode/solution interface using in situ scanning tunneling microscopy (STM). However, STM measurements has been limited to only electrically conductive materials in which the STM measures tunneling currents between the tip and the sample. On the contrary, the atomic force microscopy (AFM), which is one of the scanning probe microscopes, has been possible to measure the surface structure of nonconductive materials. In this study, we aimed at the development of in situ AFM methods at solid/solution interfaces.Following results were obtained in our studies so far.1)Vibration isolation systems, feed back circuits, and other components have been established using an STM apparatus in order to achieve an atomic resolution.2)Observations of atomic images of gold (Au) and adsorbed species have been achieved in STM measurements.3)AFM observations of atomic image of mica and graphite have been achieved in a pure water.4)AFM observations of step-terrace structures on Au(111) have been achieved under the potential controlled.5)Developments of a commercial available apparatus of AFM made by Seiko Instruments Inc. have been done. This fruit bases on our fundamental results as mentioned above.

固体（电极）/溶液界面的原位表征在这些界面处发生的电化学过程中特别重要。最近，我们的小组和其他几个小组已经实现了一些金属或半导体在电极/溶液界面上使用原位扫描隧道显微镜（STM）的原子图像。然而，STM测量仅限于其中STM测量尖端与样品之间的隧穿电流的导电材料。相反，原子力显微镜（AFM），这是一种扫描探针显微镜，已能够测量非导电材料的表面结构。本研究旨在发展固/液界面的原位原子力显微镜方法，取得了以下研究成果：1）隔振系统、反馈电路、2）在STM测量中实现了金（Au）和吸附物种的原子图像的观察。3）在纯水中实现了云母和石墨原子像的AFM观察。4）在控制电位下实现了Au（111）表面台阶结构的AFM观察。已经完成了。这个结果是基于我们上面提到的基本结果。