Comparison of carbon nanotube forest growth using AlSi, TiSiN, and TiN as conductive catalyst supports

Junwei Yang, Santiago Esconjauregui, Hisashi Sugime, Taron Makaryan, Toby Hallam, Georg S. Duesberg, John Robertson

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We evaluate carbon nanotube growth by employing AlSi, TiSiN and TiN as conductive catalyst supports. Using a wide range of chemical vapour deposition conditions, we find that only AlSi and TiSiN yield homogeneously-sized nanoparticles, which are stable throughout both catalyst preparation and nanotube synthesis processes. This favours the growth of forests with area densities of the order of 1012 nanotubes cm-2. TiN, in contrast, yield lower density forests in a very narrow window process. The forests and the three screened catalyst supports show ohmic conductivity. TiSiN, however, is the only conductor that leads to the very robust growth process. This suggests TiSiN is useful for applications requiring forest growth on conductors and thus warrants further assessment for reducing nanotube diameter and improving area density of the forests.

Original languageEnglish
Pages (from-to)2389-2393
Number of pages5
JournalPhysica Status Solidi (B) Basic Research
Volume251
Issue number12
DOIs
Publication statusPublished - 2014 Dec 1
Externally publishedYes

Keywords

  • Bulk diffusion
  • Carbon nanotubes
  • Conductive supports
  • Forest growth

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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