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説明:

Carbon nanotubes are uniquely featured by the nanoscale tubular structure with a highly-curved surface and defined chirality. The diameter and chirality fundamentally determine their stability, electrical and thermal properties. Up to now, the relationship between the intrinsic thermal conductivity and the atomic features of CNTs has not been established, due to the challenges in precise measurements and characterizations. In this work, we develop a micro electro-thermal device enabling simultaneous thermal measurements by Raman spectroscopy and atomic structural characterization by transmission electron microscopy for individual CNTs. The influence of diameter and chirality is systematically investigated. In addition, the temperature dependence of the thermal conductivity was extracted from parameter optimization of finite-element modeling. It is found that the thermal transport of CNTs depends mainly on the diameter, while the chiral angle has no significant influence. Along with increasing diameter, the room temperature thermal conductivity increases and eventually approaches the limit of flat graphene.

権利情報:

• Creative Commons BY-NC-ND Attribution-NonCommercial-NoDerivs 4.0 International
  

キーワード: Carbon nanotubes, Thermal conductivity, Diameter, Chirality, Raman spectroscopy

刊行年月日: 2024-09-30

出版者: Elsevier BV

掲載誌:

• Journal of Materials Science & Technology (ISSN: 10050302) vol. 221 p. 46-53

研究助成金:

• National Key Research and development Program of China 2022YFA1203303
• National Natural Science Foundation of China 52130209, 52188101
• JSPS Kakenhi JP25820336, JP20K05281, JP23H01796
• JST-FOREST Program JPMJFR223T
• "Advanced Research Infrastructure for Materials and Nanotechnology in Japan (ARIM)" of the Ministry of Education, Culture, Sports, Science and Technology (MEXT) JPMXP1223NM5306

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5306

公開URL: https://doi.org/10.1016/j.jmst.2024.09.019

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更新時刻: 2025-01-29 13:25:36 +0900

MDRでの公開時刻: 2026-09-30 08:37:51 +0900