Visualization of ion diffusion process at interface by sequential measurement method of electrostatic potential.

2016 Fiscal Year Final Research Report

• Project/Area Number: 15K13622
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Physical chemistry
• Research Institution: Japan Advanced Institute of Science and Technology
• Principal Investigator: Oshima Yoshifumi 北陸先端科学技術大学院大学, 先端科学技術研究科, 准教授 (80272699)
• Research Collaborator: ZHANG Xiaobin 北陸先端科学技術大学院大学, ナノマテリアルテクノロジーセンター, 研究員 (40647111)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: 透過型電子顕微鏡 / 位相情報 / 静電ポテンシャル / イオン拡散

Outline of Final Research Achievements

In order to clarify the visualization of the electrostatic potential distribution at the interfaces of two different phases and find the local ion diffusion at the interface, intensity transport equations was applied to the transmission electron microscope (TEM) images. We succeeded in obtaining the electrostatic potential at the a-Ge film / vacuum interface from the three TEM images of under focus, in focus and over focus. Actually, we solved the problem that the low frequency component of white noise is emphasized in the TIE phase map by narrower region of interest, and also solved the problem that the intensity transport equation could not be applied to the image not satisfying the periodic boundary condition such as TEM image of two phase interface by mirroring method.

Free Research Field

表面界面物性