Enhanced anisotropic heat conduction in multi-walled carbon nanotubes

Hiroyuki Hayashi, Tatsuya Ikuta, Takashi Nishiyama, Koji Takahashi

研究成果: Contribution to journalArticle査読

21 被引用数 (Scopus)

抄録

Anisotropy of heat conduction in multi-walled carbon nanotubes (MWNTs) is investigated by measuring heat flows in a pristine MWNT and in a MWNT with defects. The in- and out-of-shell thermal conductivities of each MWNT graphite shell are determined, and differences of more than four orders of magnitude are obtained because of the inter-shell gaps. This enhanced anisotropy reduces the conductance by 74% compared with that of the pristine MWNT because of the presence of outer shell defects, which comprise only 2.8% volume ratio. Furthermore, the anisotropy-assisted length dependence of thermal conductivity is demonstrated, even though there is no ballistic phonon transport.

本文言語英語
論文番号014301
ジャーナルJournal of Applied Physics
113
1
DOI
出版ステータス出版済み - 1 7 2013

All Science Journal Classification (ASJC) codes

  • 物理学および天文学(全般)

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