Controlling the quantity of α -Fe inside multiwall carbon nanotubes filled with Fe-based crystals: The key role of vapor flow-rate

Filippo S. Boi, Serena Maugeri, Jian Guo, Mu Lan, Shanling Wang, Jiqiu Wen, Gavin Mountjoy, Mark Baxendale, George Nevill, Rory M. Wilson, Yi He, Sijie Zhang, Gang Xiang

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

The growth control of α-Fe inside multiwall carbon nanotubes has challenged researchers for more than a decade owing to the coexistence of this phase with Fe3C and γ-Fe. Previously, long heating treatments of 20 h have been used to decompose the encapsulated Fe-phases in C and Fe; however, these methods were limited by an unusual oxidation process leading to nanotube decomposition. In this letter, we report an alternative chemical vapour deposition approach that through an accurate control of the ferrocene-vapour flow-rate allows to achieve the direct encapsulation of 95% of α-Fe without additional heating treatments.

Original languageEnglish
Article number243108
JournalApplied Physics Letters
Volume105
Issue number24
DOIs
Publication statusPublished - 15 Dec 2014
Externally publishedYes

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