Elucidation of material distribution in catalytic reaction field by three-dimensional AFM

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K14586
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 32010:Fundamental physical chemistry-related
• Research Institution: Kanazawa University
• Principal Investigator: Morimoto Masayuki 金沢大学, ナノマテリアル研究所, 特任助教 (60854669)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 原子間力顕微鏡 / 固液界面 / 吸着

Outline of Final Research Achievements

To understand phenomena such as adsorption, desorption, and catalytic reactions occurring at the solid-liquid interface, atomic force microscopy (AFM) measurements were performed in liquid. By designing a measurement cell in which the solution environment can be controlled during the measurement, it was demonstrated that the adsorption mechanism changes depending on the solvent used. In addition, the local interaction force including water molecules and ions distributed around the molecule was also measured. The results showed that AFM measurement techniques are useful for understanding various phenomena occurring at the solid-liquid interface.

Free Research Field

ナノ計測、電気化学

Academic Significance and Societal Importance of the Research Achievements

固体表面と溶媒分子やイオン種、溶質分子などの間で起こる界面現象を直接計測することは、そのメカニズムを理解することに留まらず新規材料設計に大きく貢献すると考えられる。しかし、固液界面を直接計測する手法は限られており、さらに分子や官能基のレベルで現象を捉えることは困難であった。本研究では、原子間力顕微鏡(AFM)によって固液界面のナノスケールでの計測を達成しており、AFMの有用性を示すと同時に、これまで対象とされていない様々な界面現象を理解する足掛かりとなることを示した。