Low-Temperature Growth of Carbon Nanotube Forests Consisting of Tubes with Narrow Inner Spacing Using Co/Al/Mo Catalyst on Conductive Supports

Hisashi Sugime, Santiago Esconjauregui, Lorenzo D'Arsié, Junwei Yang, Alex W. Robertson, Rachel A. Oliver, Sunil Bhardwaj, Cinzia Cepek, John Robertson

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

We grow dense carbon nanotube forests at 450 °C on Cu support using Co/Al/Mo multilayer catalyst. As a partial barrier layer for the diffusion of Co into Mo, we apply very thin Al layer with the nominal thickness of 0.50 nm between Co and Mo. This Al layer plays an important role in the growth of dense CNT forests, partially preventing the Co-Mo interaction. The forests have an average height of ∼300 nm and a mass density of 1.2 g cm-3 with tubes exhibiting extremely narrow inner spacing. An ohmic behavior is confirmed between the forest and Cu support with the lowest resistance of ∼8 kΩ. The forest shows a high thermal effusivity of 1840 J s-0.5 m-2 K-1, and a thermal conductivity of 4.0 J s-1 m-1 K-1, suggesting that these forests are useful for heat dissipation devices. (Figure Presented).

Original languageEnglish
Pages (from-to)16819-16827
Number of pages9
JournalACS Applied Materials and Interfaces
Volume7
Issue number30
DOIs
Publication statusPublished - 2015 Aug 5

Keywords

  • catalyst nanoparticles
  • chemical vapor deposition
  • cocatalyst
  • low-temperature growth
  • sputtering
  • thermal conductivity
  • thermal effusivity

ASJC Scopus subject areas

  • Materials Science(all)

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