2022 Fiscal Year Annual Research Report
Chirality engineering of single-walled carbon nanotubes by in situ TEM probing
| Project/Area Number |
20K05281
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| Research Institution | National Institute for Materials Science |
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Principal Investigator |
湯 代明 国立研究開発法人物質・材料研究機構, 国際ナノアーキテクトニクス研究拠点, 主任研究員 (50646271)
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | carbon nanotube / chirality / in situ TEM / transport properties / nanotransistors |
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| Outline of Annual Research Achievements |
Single-walled carbon nanotubes (SWCNTs) are the most promising candidate for the energy-efficient nanotransistors. However, there is a fundamental challenge to control the chirality, which intrinsically determines the SWCNTs to be metallic or semiconducting. In this project, it is proposed to “engineer” the chirality of individual SWCNTs. There are three goals: The first goal is to reveal the chirality transition mechanism. The second goal is to control the metal-to-semiconductor transition. The third goal is to fabricate nanotransistors by using the chirality-transformed semiconducting nanotubes as the channels.
Progresses have been made to transform the SWCNT chirality and to fabricate nanotube transistors. Using in situ transmission electron microscopy (TEM), we applied heating and mechanical strain to transform the local chirality to fabricate nanotube transistor. Quantum transport at room temperature was demonstrated for the fabricated nanotube transistors with a channel length as short as 2.8 nanometers. In addition, the temperature distribution of the Joule heated nanotube was investigated by in situ TEM electron energy-loss plasmon spectroscopy at nanometer resolution. Temperatures of over 2000 K were measured at the locally hot spot before the plastic deformation of the nanotube.
The research results have been published in top journals such as Science, Science Advances, ACS Nano, Carbon, and Nano Research.
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Research Products
(7 results)
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[Presentation] Semiconductor Nanochannels in Metallic Carbon Nanotubes by Thermomechanical Chirality Alteration2022
Author(s)
TANG Daiming, Dmitry G. Kvashnin, CRETU Ovidiu, Guohai Chen, Don N. Futaba, Yongjia Zheng, Rong Xiang, Shigeo Maruyama, Hui-Ming Cheng, BANDO Yoshio, Chang Liu, Pavel B. Sorokin, GOLBERG Dmitri
Organizer
MRS Fall Meeting
Int'l Joint Research / Invited
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[Presentation] Semiconductor nanochannels in metallic carbon nanotubes by thermomechanical chirality alteration2022
Author(s)
TANG Daiming, Dmitry G. Kvashnin, CRETU Ovidiu, Guohai Chen, Don N. Futaba, Yongjia Zheng, Rong Xiang, Shigeo Maruyama, Hui-Ming Cheng, BANDO Yoshio, Chang Liu, Pavel B. Sorokin, GOLBERG Dmitri
Organizer
The 62nd Fullerenes-Nanotubes-Graphene General Symposium
Int'l Joint Research
