Surface protonics materials based on hydration acid-base reaction at oxide surface

2014 Fiscal Year Final Research Report

• Project/Area Number: 23246112
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Inorganic materials/Physical properties
• Research Institution: The University of Tokyo
• Principal Investigator: YAMAGUCHI Shu 東京大学, 工学(系)研究科(研究院), 教授 (10182437)
• Co-Investigator(Kenkyū-buntansha): MIYOSHI Shogo 東京大学, 大学院工学系研究科, 助教 (30398094)
• Co-Investigator(Renkei-kenkyūsha): OYAMA Yukiko 富山高等専門学校, 准教授 (00345373)
• Project Period (FY): 2011-04-01 – 2015-03-31
• Keywords: 表面・界面物性 / プロトン伝導 / 固体酸 / Lewis酸 / 電気二重層

Outline of Final Research Achievements

This study has been devoted to develop the surface protonics materials, which originates from hydration acid-base reaction at surface of nano-grained oxides. It has been revealed that the formation and transport of protons are governed by the interaction between the surface-terminating protonic species and adsorptive species on them, which is strongly affected by surface modification with gasesous species. It has also been demonstrated that the thin films of insulating and dielectric oxides fabricated with a sputtering method show protonic conduction, which in some cases predominates the conduction behavior. And even if the protonic conduction is of minority, the proronic defects serve as the mediator of redox reaction of the oxide thin films, which significantly affects the electrical properties.

Free Research Field

固体イオニクス