Effect of oxygen plasma alumina treatment on growth of carbon nanotube forests

Junwei Yang, Santiago Esconjauregui*, Rongsie Xie, Hisashi Sugime, Taron Makaryan, Lorenzo D'Arsié, David Leonardo Gonzalez Arellano, Sunil Bhardwaj, Cinzia Cepek, John Robertson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


We use oxygen plasma to increase the height of forests from ∼0.2 to >2 mm. The effectiveness of treating alumina by oxygen plasma, prior to iron nanoparticle formation, is studied using cycles of nanotube growth, nanotube burning, and regrowth. This demonstrates that plasma-treated alumina is more resistant to iron bulk diffusion than an untreated one. Secondary ion mass spectroscopy shows there is negligible iron diffusion into the bulk of treated alumina. Plasma treatment of catalyst supports is potentially useful for growth of ultra-high-density nanotube forests for applications such as interconnects in integrated circuits and heat sinks.

Original languageEnglish
Pages (from-to)18683-18692
Number of pages10
JournalJournal of Physical Chemistry C
Issue number32
Publication statusPublished - 2014 Aug 14
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films


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