Synthesis of vertically-aligned CNT arrays from diameter-controlled Fe3O4 nanoparticles

Almost monodisperse Fe3O4 nanoparticles (NPs) with four distinct mean sizes prepared by thermal decomposition were self-assembled onto a silicon substrate in the form of multi-layers using a simple drop-drying method. These multilayered Fe3O4 NPs were used as the catalysts to grow vertically-aligned...

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Bibliographic Details
Published in:Journal of the Ceramic Society of Japan 2014/03/01, Vol.122(1423), pp.187-191
Main Authors: ZHAO, Wei, SEO, Dong Nam, GONG, Jianghong, KIM, Sukyoung, KIM, Ik Jin
Format: Article
Language:English
Subjects:
Carbon nanotubes
Fe3O4
Monodisperse
Nanoparticles
Vertically-aligned
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Summary:Almost monodisperse Fe3O4 nanoparticles (NPs) with four distinct mean sizes prepared by thermal decomposition were self-assembled onto a silicon substrate in the form of multi-layers using a simple drop-drying method. These multilayered Fe3O4 NPs were used as the catalysts to grow vertically-aligned carbon nanotube arrays (VACNTAs) by chemical vapor deposition (CVD). The correlation between the CNT diameter and the NP size was determined. Catalysts with different sizes play a vital role in influencing the diameters and structures of CVD-grown CNTs. In addition, the size of the catalyst NPs is a critical factor for obtaining dense arrays of VACNTs. This method is a relatively simple and environmental friendly process compared to previous methods, and has the potential for the mass production of VACNTAs.
ISSN:1882-0743
1348-6535
DOI:10.2109/jcersj2.122.187