窒化ホウ素と同軸に包まれた単層カーボンナノチューブの電界効果トランジスタへの応用

2019 年度 実績報告書

• 研究課題/領域番号: 19J13441
• 研究機関: 東京大学
• 研究代表者: 柳 銘 東京大学, 工学系研究科, 特別研究員(DC2)
• 研究期間 (年度): 2019-04-25 – 2021-03-31
• キーワード: 1D hetero nanotubes / Coxial structure / Carbon nanotubes / Boron nitride nanotubes / TEM

研究実績の概要

The objective of this project is to synthesize a coaxial structure material of combining single walled carbon nanotubes (SWCNTs) and boron nitride nanotubes (BNNTs) for improving the performance of carbon nanotubes field-effect transistors. In the past year, we have obtained a significant amount of new results relating to controlling the synthesis process of SWCNTs wrapped with BNNTs, TEM characterizations of the micro structure of the nanotubes, and thermal stability test of the new material. These results are the fundamental part for building a high efficiency field-effect transistor. Besides, some of the results have been included in our recent published paper on Science. This project also brought several collaboration work with groups in different universities in Europe and the USA.

現在までの達成度 (区分)

1: 当初の計画以上に進展している

理由

The project is going well as planned. The original plan was using the first year to get a better understanding of the growth mechnism and properties of the one-dimensional hetero nanotubes of SWCNTs and BNNTs. So far, we are capable of using transmission electron microscopy to exam the quality of the boron nitride coating on carbon nanotubes and to investigate the growth mechanism. Moreover, by adjusting the CVD time of boron nitride, the number of layer boron nitride on carbon nanotubes is controllable. Besides, we also confirmed after coating the boron nitride layers on carbon nanotubes, the thermal stability of the hetero nanotubes is much better than the original carbon nanotubes. The experimental results we have obtained show the progress of the project is very well.

今後の研究の推進方策

In the next year, firstly, we are going to improve the quality of the hetero nanotubes of single walled carbon nanotubes coated by boron nitride nanotubes in terms of the uniformity, the morphology of the nanotubes, and the electrical properties. Secondly, we will try to synthesize different one dimensional hetero nanotubes combining boron nitride nanotubes and molybdenum disulfide nanotubes. For the new hetero nanotubes, we will use various charaterization methods including TEM, SEM, Raman spectroscopy, and PL to study the structure and properties. Finally, we want to test the efficienct of field-effect transistors using hetero nanotubes in order to find more effective materials for the future transistor.

研究成果

• [雑誌論文] One-dimensional van der Waals heterostructures (2020)
  • 著者名/発表者名: R. Xiang*, T. Inoue, Y. Zheng, A. Kumamoto, Y. Qian, Y. Sato, M. Liu, D. Gokhale, J. Guo, K. Hisama, S. Yotsumoto, T. Ogamoto, H. Arai, Y. Kobayashi, H. Zhang, B. Hou, A. Anissimov, Y. Miyata, S. Okada, S. Chiashi, Y. Li, E. I. Kauppinen, Y. Ikuhara, K. Suenaga, S. Maruyama*
  • 雑誌名: Science 巻: 367 ページ: 537-542
  • DOI: 10.1126/science.aaz2570
  • 査読あり / 国際共著
• [雑誌論文] Efficient growth of vertically-aligned single-walled carbon nanotubes combining two unfavorable synthesis conditions (2019)
  • 著者名/発表者名: M. Liu, H. An, A. Kumamoto, T. Inoue, S. Chiashi, R. Xiang*, S. Maruyama*
  • 雑誌名: Carbon 巻: 146 ページ: 413-419
  • DOI: https://doi.org/10.1016/j.carbon.2019.01.109
  • 査読あり / 国際共著
• [学会発表] Synthesis of Boron Nitride Nanotubes and MoS2@BNNTs Heteronanotubes (2020)
  • 著者名/発表者名: M. Liu, Y. Zheng, Y. Qian, R. Xiang, T. Inoue, S. Chiashi, E. I. Kaippinen, S. Maruyama
  • 学会等名: The 58th Fullerene-Nanotube-Graphene General Symposium
• [学会発表] Synthesis of MoS2 Nanotubes based on Boron Nitride Nanotubes (2020)
  • 著者名/発表者名: M. Liu, Y. Zheng, Y. Qian, R. Xiang, T. Inoue, S. Chiashi, E. I. Kaippinen, S. Maruyama
  • 学会等名: International Winterschool on Electronic Properties of Novel Materials
  • 国際学会
• [学会発表] Synthesis of Vertically Aligned Single-walled Carbon Nanotubes Wrapped with BN and BN Nanotubes Array (2019)
  • 著者名/発表者名: M. Liu, Y. Zheng, T. Inoue, S. Chiashi, R. Xiang, E. I. Kauppinen, S. Maruyama
  • 学会等名: The 20th International Conference on the Science and Application of Nanotubes and Low-Dimensional Materials
  • 国際学会
• [学会・シンポジウム開催] International Winterschool on Electronic Properties of Novel Materials (2020)
• [学会・シンポジウム開催] The 20th International Conference on the Science and Application of Nanotubes and Low-Dimensional Materials (2019)