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

doi:10.1063/1.4904839

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 journal › Article › peer-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 language	English
Article number	243108
Journal	Applied Physics Letters
Volume	105
Issue number	24
DOIs	https://doi.org/10.1063/1.4904839
Publication status	Published - 15 Dec 2014
Externally published	Yes

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Boi, F. S., Maugeri, S., Guo, J., Lan, M., Wang, S., Wen, J., Mountjoy, G., Baxendale, M., Nevill, G., Wilson, R. M., He, Y., Zhang, S., & Xiang, G. (2014). Controlling the quantity of α -Fe inside multiwall carbon nanotubes filled with Fe-based crystals: The key role of vapor flow-rate. Applied Physics Letters, 105(24), Article 243108. https://doi.org/10.1063/1.4904839

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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.",

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AU - Guo, Jian

AU - Lan, Mu

AU - Wang, Shanling

AU - Wen, Jiqiu

AU - Mountjoy, Gavin

AU - Baxendale, Mark

AU - Nevill, George

AU - Wilson, Rory M.

AU - He, Yi

AU - Zhang, Sijie

AU - Xiang, Gang

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

Abstract

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