2022 Fiscal Year Annual Research Report
Transport properties and device applications of one-dimensional heterostructure nanotubes
| Project/Area Number |
21F21364
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| Allocation Type | Single-year Grants |
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| Research Institution | The University of Tokyo |
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Principal Investigator |
丸山 茂夫 東京大学, 大学院工学系研究科(工学部), 教授 (90209700)
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| Co-Investigator(Kenkyū-buntansha) |
FENG YA 東京大学, 工学(系)研究科(研究院), 外国人特別研究員
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| Project Period (FY) |
2021-11-18 – 2024-03-31
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| Keywords | SWCNTs / BNNT / TEM / 1D vdW heterostructure / thermal transport / Raman |
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| Outline of Annual Research Achievements |
Ultralong single-walled carbon nanotubes had been prepared on the specially designed DIY TEM grid and their thermal properties were carefully studied by Raman spectroscopy. Meanwhile, their atomic structure had been determined by TEM. One the other hand, one-dimensional van der Waals heterostructure nanotubes were successfully built on atomically precise single-walled carbon nanotubes.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
The plan set for 2022 has been achieved. We can massively fabricate the specially designed DIY TEM grid by MEMS. This special TEM grid allowed us to study the thermal transport of the long suspended single-walled carbon nanotubes synthesized on it through optothermal Raman technique, and also enabled TEM observation of the atomic structure of the sample under investigation. Therefore, the unclear relation between thermal conductivity and atomic structure of carbon nanotubes can be determined by this unique technique. One-dimensional van der Waals heterostructure also had realized on these several micro-meter long nanotubes, which also had been confirmed by TEM. Moreover, we had built one-dimensional van der Waals heterostructures on atomically precise single-walled carbon nanotubes, that is to say, on chirality-specific single-walled carbon nanotubes.
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| Strategy for Future Research Activity |
BNNT thickness engineering to search for the best top-gated FET performances by gating on BNNT layer; Optimizing the etching parameters before metal deposition to selectively remove BNNT but not SWCNT in order to enhance contacts.
Synthesizing SWCNT-BNNT-SWCNT van der Waals heterostructure. The outmost SWCNT would be metallic due to the very large diameter, therefore, we might be able to deliver a gate-all-around FET by the simplest fabrication method.
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Research Products
(10 results)
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[Presentation] 1D Heterostructures Grown on Semi-conducting Single-walled Carbon Nanotube Thin Film2022
Author(s)
Shuhui Wang, Ming Liu, Ya Feng, Chiyu Zhang, Koki Kozaki, Ruixi Zhang, Yongjia Zheng, Keigo Otsuka, Shohei Chiashi, Takeshi Tanaka, Hiromichi Kataura, Rong Xiang, Yuhuang Wang, Shigeo Maruyama
Organizer
International Conference on the Science and Application of Nanotubes and Low-Dimensional Materials (NT22)
Int'l Joint Research
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[Presentation] Synthesis and Structural Characterization of Boron Nitride Nanotubes with the Chirality-Sorted Carbon Nanotubes as the Template2022
Author(s)
Ruixi Zhang, Ya Feng, Henan Li, Akihito Kumamoto, Shuhui Wang, Yongjia Zheng, Ming Liu, Wanyu Dai, Keigo Otsuka, Takeshi Tanaka, Hiromichi Kataura, Yuichi Ikuhara, Rong Xiang, Shigeo Maruyama
Organizer
International Conference on the Science and Application of Nanotubes and Low-Dimensional Materials (NT22)
Int'l Joint Research
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