The Role of Catalyst Metal in Synthesis of Carbon Nanotubes by Thermal CVD Method
Main Article Content
Abstract
Carbon nanotubes were synthesized by thermal chemical vapor deposition method using acetylene (C₂H₂) as carbon precursor, permalloy (Fe₁₉Ni₈₁) as catalyst. The formation, dimension and morphology of nanotubes were strongly depended on the parameters of catalyst thin film and sintering temperature. At 750°C, with 10-nm thickness catalyst film, carbon nanotubes were aligned vertically, but when catalyst film was thicker than 20 nm, no CNT was observed. In the range from 650 °C to 850 °C, at higher sintering temperature, the obtained carbon nanotubes had larger diameter.
Keywords
carbon nanotubes, VLS mechanism, thermal CVD, catalyst metal
Article Details
References
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[17] Wei-Wen Liu, Azizan Aziz, Sian-Piao Chai, Abdul Rahman Mohamed, U. Hashim, Journal of Nanomaterials, 2013 (2013) ID 592464.
[18] B. S. Sinnott, R. Andrews, D. quian, A. M. Rao, Z. Mao, E. C. Dickey, F. Derbyshire, Chemical Physics Letters, 315 (1999) 25-30.
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[20] Eric R. Meshot, Desirée L. Plata, Sameh Tawfick, Yongxi Zhang, Eric A. Verploegen and John Hart, ACS Nano, 3(9) (2009) 2477-2486.
[21] Q. Yang, C. Xiao, W. Chen, A. K. Singh, T. Asai, A. Hirose, Diamond and related materials, 12 (2003) 1482-1487.