evelopmentof stable CNT-doping method by the encapsulation of halogenation reagents

2020 Fiscal Year Final Research Report

• Project/Area Number: 19K15539
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 33010:Structural organic chemistry and physical organic chemistry-related
• Research Institution: Nagoya University
• Principal Investigator: Omachi Haruka 名古屋大学, 物質科学国際研究センター, 講師 (60711497)
• Project Period (FY): 2019-04-01 – 2021-03-31
• Keywords: カーボンナノチューブ / トランジスタ / 内包 / ドーピング

Outline of Final Research Achievements

In this work, we tried to develop a stable CNT-doping method by the encapsulation of halogenation reagents. Although we confirmed that bromine atoms were encapsulated into CNTs using bromination reagents and p-type doping was achieved in Raman spectra, the encapsulation of the dopant was not efficient enough to change the transistor characteristics. However, in the course of the study, it was confirmed that some organic oxidants acted as p-dopants with high-temperature conditions and long-term stability. We also established separation techniques for separating semiconducting CNTs and a novel fabrication method for forming CNT thin films, which were necessary to fabricate thin-film transistor for the evaluation of doping efficiency.

Free Research Field

ナノ材料化学

Academic Significance and Societal Importance of the Research Achievements

本研究の遂行によりCNTトランジスタの実用化に向けての課題の一つであったドーピング技術の確立と長期安定動作の実証に向けての手法が確立された。本研究をさらに発展させることで、人に貼って使えるストレッチャブルCNTデバイスなどの実用化への道が拓けるという意味でその意義は大きい。