Growth of bilayer graphene with various orientation angles using high degree reduction of graphene oxide and its structural analysis

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K17439
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Nanomaterials chemistry
• Research Institution: The University of Tokyo
• Principal Investigator: Obata Seiji 東京大学, 大学院新領域創成科学研究科, 特任助教 (90616244)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: グラフェン / 酸化グラフェン / プラズマ

Outline of Final Research Achievements

I tried to synthesize bilayer graphene with various orientation angles on insulators and improve the crystallinity of graphene made from graphene oxide(GO).Using high degree reduction of GO I had developed, I achieved high throughput synthesis of bilayer graphene on SiO2 substrate. Due to the weak interaction between GO and graphene, synthesized bilayer graphene sheets have various orientation angles. Furthermore, I found that changing the flow rate of the gases improved crystallnity of graphene in the high degree reduction method. In addition, using a tungsten filament heated to around 2000℃, instead of Cu catalysts and plasma treatment, growth temperature of graphene markedly decreased to 380℃. I also revealed the mechanism of the restoration and reduction process of GO by in-situ conductivity measurement.

Free Research Field

材料科学