Thermal stability of catalytically grown multi-walled carbon nanotubes observed in transmission electron microscopy |
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| Authors: | Cheng-Yu Wang Chuan-Pu Liu and C B Boothroyd |
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| Institution: | (1) Department of Materials Science and Engineering, National Cheng Kung University, Tainan, 701, Taiwan;(2) Center for Micro/Nano Science and Technology, National Cheng Kung University, Tainan, 701, Taiwan;(3) Center for Electron Nanoscopy, Technical University of Denmark, 2800 Kongens Lyngby, Denmark |
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| Abstract: | The thermal stability of multi-walled carbon nanotubes (MWCNTs) was assessed in situ by transmission electron microscopy.
Upon heating, Ni catalysts in MWCNTs containing bamboo structures shrank from the tail due to evaporation, leading to additional
bamboo formation and tube elongation at 800°C, while the MWCNTs with FeSi catalysts remained intact up to 1050°C except for
better crystallinity. The physisorbed carbon and/or hydrocarbon on surfaces and super-saturated carbon in the Ni catalysts
should be responsible for the phenomena. |
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| Keywords: | PACS" target="_blank">PACS 81 01 De 81 07 Bc 87 64 Ee |
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