Evaluation of thermal conductivity of a multi-walled carbon nanotube using the ΔVgs method

Hiroki Shioya, Taisuke Iwai, Daiyu Kondo, Mizuhisa Nihei, Yuji Awano

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


Thermal conductivity of a multi-walled carbon nanotube (MWNT) was evaluated using the ΔVgs method for the first time. MWNTs were prepared in pillars, and the pillars were placed on two aluminum nitride (AlN) substrates. An AlGaN/GaN high electron mobility transistor (HEMT) chip, which was set on an AlN substrate, was used as a thermometer and as a thermal source. The thermal resistance of the sample was measured using the ΔV gs method. From the thermal resistance of MWNT pillars, we succeeded in evaluating the thermal conductivity of a MWNT pillar and that of a MWNT as high as 74.2 and 950W/(m·K), respectively. The thermal conductivity of MWNTs evaluated in this study is much higher than that of usual metals. We confirmed that MWNTs are promising materials for heat dissipation problems.

Original languageEnglish
Pages (from-to)3139-3143
Number of pages5
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Issue number5 A
Publication statusPublished - 2007 May 8
Externally publishedYes


  • Carbon nanotube
  • HEMTs
  • Heat dissipation
  • Methodology
  • Schottky gate diode
  • Thermal bump
  • Thermal conductivity
  • Thermal resistance
  • ΔV method

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)


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