In situ control of the catalyst efficiency in chemical vapor deposition of vertically aligned carbon nanotubes on predeposited metal catalyst films

Gyula Eres, A. A. Puretzky, D. B. Geohegan, H. Cui

Research output: Contribution to journalArticlepeer-review

114 Scopus citations

Abstract

The enhancement of catalyst efficiency in chemical vapor deposition (CVD) of vertically aligned carbon nanotubes on predeposited metal catalyst films was discussed. Ferrocene was found to enhance carbon nanotube growth rates and extend growth to 3.25 mm thick carbon nanotube films. It was found that the temperature dependence of the carbon nanotube growth with ferrocene exhibits a steep drop at high substrate temperatures and a loss of vertical alignment at 900°C. It was suggested that the reaction mechanism of vertically aligned carbon nanotube growth is governed by a heterogeneous intermediate step.

Original languageEnglish
Pages (from-to)1759-1761
Number of pages3
JournalApplied Physics Letters
Volume84
Issue number10
DOIs
StatePublished - Mar 8 2004

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