Relationship between solvation structures and functionalities of proteins in ionic liquids

2016 Fiscal Year Final Research Report

• Project/Area Number: 15K17467
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Thin film/Surface and interfacial physical properties
• Research Institution: The University of Tokyo (2016); Kyoto University (2015)
• Principal Investigator: Umeda Kenichi 東京大学, 大学院新領域創成科学研究科, 特別研究員 (60746915)
• Research Collaborator: YAMADA Hirofumi 京都大学, 大学院工学研究科, 教授 ; KOBAYASHI Kei 京都大学, 大学院工学研究科, 准教授 ; MINATO Taketoshi 京都大学, 産官学連携本部, 特定准教授
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: 3次元周波数変調型原子間力顕微鏡 / イオン液体 / 溶媒和構造 / 分子動力学計算 / 密度汎関数法

Outline of Final Research Achievements

Ionic liquids are expected to be applied to novel electrochemical and biofunctional devices due to their unique properties such as nonvolatile, nonflammable and high electric capacity. In this study, we visualized three dimensional solvation structures in aqueous solutions of a protic ionic liquid, Ethylammonium nitrate (EAN), and an aprotic ionic liquid, 1-Ethyl-3-methylimidazolium dicyanamide (emim-DCA) and revealed the relationship between the surface/solution properties and the solvation structures by ultra-low noise frequency-modulation atomic force microscopy (FM-AFM) with 3D-force mapping technique. In addition, we simulated the solvation structures by molecular dynamics technique and gained deep insight into the molecular structures.

Free Research Field

電子工学