Improvement of the conduction properties of carbon nanotubes by nano-surface modification

2022 Fiscal Year Final Research Report

• Project/Area Number: 20H02079
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 19020:Thermal engineering-related
• Research Institution: The University of Tokyo
• Principal Investigator: Chiashi Shohei 東京大学, 大学院工学系研究科(工学部), 准教授 (50434022)
• Co-Investigator(Kenkyū-buntansha): 児玉 高志 東京大学, 大学院工学系研究科(工学部), 客員研究員 (10548522) ; 志賀 拓麿 国立研究開発法人産業技術総合研究所, 計量標準総合センター, 主任研究員 (10730088)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 単層カーボンナノチューブ / 電気伝導特性 / 熱伝導特性 / 光学物性

Outline of Final Research Achievements

The electrical and thermal conduction properties of single-walled carbon nanotubes (SWCNTs) and their effects from external factors were analyzed to control the conduction and to improve their functionality. Based on the fact that the properties of SWCNTs are sensitive to strain, temperature, and the dielectric constant of the surrounding area, we succeeded in controlling the conduction properties by directly synthesizing a hexagonal boron nitride layer on the outer surface of single-walled CNTs as a surface modification and by controlling doping with ionic liquids. We have also developed a new technology for fabricating high-quality single-wall CNT thin films, and have made significant progress toward the application of CNTs in electronic devices.

Free Research Field

分子熱工学

Academic Significance and Societal Importance of the Research Achievements

単層CNTの実用的応用に向け，その優れた物性を損なわずに，デバイス等に組み込む技術が重要になる．本研究課題の成果により，単層CNTの表面や置かれた環境と，物性との関係性を明らかになることで，その指針を得たと言える．さらに，開発した単層ＣＮＴ薄膜作製技術は任意のCNTサンプルに適応可能であり，不純物などを一切含まないことから，電子デバイス等への応用に向けて大きなブレイブルーとなることが期待できる．