Chemistry of graphene edges

2015 Fiscal Year Final Research Report

• Project/Area Number: 25790002
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Nanostructural chemistry
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: Fujii Shintaro 東京工業大学, 理工学研究科, 流動研究員 (70422558)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: グラフェン / 電子物性 / プローブ顕微鏡 / 密度汎関数法 / 化学修飾

Outline of Final Research Achievements

Chemistry of graphene edges significantly affects their electronic properties. Despite a large number of experimental and theoretical studies dealing with the geometrical shape-dependent electronic properties of graphene edges, experimental characterization of their chemistry is clearly lacking. This is mostly due to the difficulties in preparing chemically-modified graphene edges in a controlled manner and in identifying the exact chemistry of the graphene edge on the atomic scale. In this study, we performed scanning probe microscopic and first-principles characterization of graphene edges with different edge geometries and chemistry. Using the results of atomic scale electronic characterization and theoretical simulation, we revealed that atomic-scale details of the chemical composition have a strong impact on the electronic properties of graphene edges, i.e., the presence or absence of non-bonding π states and the degree of resonance stability.

Free Research Field

表面科学