Peeling off effects in vertically aligned Fe3C filled carbon nanotubes films grown by pyrolysis of ferrocene

Boi, Filippo S. and Medranda, Daniel and Ivaturi, Sameera and Wang, Jiayu and Guo, Jian and Lan, Mu and Wen, Jiqiu and Wang, Shanling and He, Yi and Mountjoy, Gavin and Willis, Maureen A. C. and Xiang, Gang (2017) Peeling off effects in vertically aligned Fe3C filled carbon nanotubes films grown by pyrolysis of ferrocene. Journal of Applied Physics, 121 (24). p. 244302. ISSN 0021-8979. (doi:https://doi.org/10.1063/1.4989988) (Full text available)

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Abstract

We report the observation of an unusual self-peeling effect which allows the synthesis of free standing vertically aligned carbon nanotube films filled with large quantities of Fe3C and small quantities of γ-Fe crystals. We demonstrate that this effect depends on the interplay of three main factors: (1) the physical interactions between the chosen substrate surface and grown carbon nanotubes (CNTs), which is fixed by the composition of the used substrate (111 SiO2/Si or quartz), (2) the CNT-CNT Van der Waals interactions, and (3) the differential thermal contraction between the grown CNT film and the used substrate, which is fixed by the cooling rate differences between the grown film and the used quartz or Si/SiO2 substrates. The width and stability of these films are then further increased to cm-scale by addition of small quantities of toluene to the ferrocene precursor.

Item Type: Article
Subjects: Q Science
Divisions: Faculties > Sciences > School of Physical Sciences
Depositing User: Gavin Mountjoy
Date Deposited: 17 Aug 2017 12:19 UTC
Last Modified: 18 Aug 2017 14:12 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/62879 (The current URI for this page, for reference purposes)
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