Development of graphene oxide based room temperature ferromagnets and superconductors by radical manipulation

2015 Fiscal Year Final Research Report

• Project/Area Number: 26600076
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Applied materials
• Research Institution: National Institute for Materials Science
• Principal Investigator: Taniguchi Takaaki 国立研究開発法人物質・材料研究機構, 国際ナノアーキテクトニクス研究拠点, 主任研究員 (50583415)
• Co-Investigator(Kenkyū-buntansha): YOKOI HIROYUKI 熊本大学, 大学院自然科学研究科, 准教授 (50358305)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: グラフェン / 酸化グラフェン / 強磁性 / 超伝導

Outline of Final Research Achievements

This study have focused on development of new room-temperature ferromagnets and superconductors based on reduced graphene oxide. The reduced graphene oxides by electrochemical,thermal,photo, chemical, and hydrothermal approach yielded various graphene oxides with different local- and micro-structures to show magnetic properties depending on the reduction methods. In particular, photo-reduced graphene oxide have carbon vacancies with partial hydrogen terminations, which gave ferromagnetic properties. We also found that electrochemical reduction removed carbon radicals, while re-oxidation gave carbon radicals, where these reactions were reversible. Although we could not archive to find out the room-temperature superconductivities in our samples, we revealed potential of giant magneto-resistance and large pseudo-capacitance in electrochemically reduced graphene oxide.

Free Research Field

無機材料化学