Functionalization of helical structure of cone-shaped graphitic whisker from wood cell cavity

2016 Fiscal Year Final Research Report

• Project/Area Number: 15K14766
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Wood science
• Research Institution: The University of Tokyo
• Principal Investigator: Saito Yukie 東京大学, 大学院農学生命科学研究科(農学部), 准教授 (30301120)
• Co-Investigator(Renkei-kenkyūsha): YAMASHITA Rie 静岡県工業技術研究所, 上席研究員 (80505636) ; KIKUCHI Keisuke 静岡県工業技術研究所, 上席研究員 (90517369)
• Research Collaborator: HAMANE Daisuke ; MATSUMOTO Rika
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: 木質バイオマス / カーボン材料 / グラフェン

Outline of Final Research Achievements

Cone-shaped graphitic whisker (CGW) is a kind of supermolecular carbon structure, consisting of single graphene layer helically stacked in a highly ordered screwed-conical manner. We revealed that CGW can generate intercalation compound (IC) with H2SO4 and the residual compound showed expand-contract behavior reversibly responding to heat/electron irradiation. The direct TEM of H2SO4-CGW IC, which was carried out by cryo technique with H2SO4-ice protecting under observation conditions of strong electron irradiation and vacuum, showed the smoothly curved axis and exposed edge on the surface. Several types of intercalants were achieved and the mechanism of its reversible mobility was investigated.

Free Research Field

木質科学