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Appl. Phys. Lett. 96, 094101 (2010); http://dx.doi.org/10.1063/1.3330848 (3 pages)

Kinetics of catalyst size dependent carbon nanotube growth by growth interruption studies

S. P. Patole1, Hyeongkeun Kim2, Jaeboong Choi1,2, Youngjin Kim1,2, Seunghyun Baik1,2,3, and J. B. Yoo1,4

1SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 440-746, Republic of Korea
2School of Mechanical Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea
3Department of Energy Science, Sungkyunkwan University, Suwon 440-746, Republic of Korea
4School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea

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(Received 19 November 2009; accepted 1 February 2010; published online 5 March 2010)

The dependence of the growth kinetics of carbon nanotubes (CNTs) on the size of the Fe-catalyst in the H2 assisted atmospheric pressure chemical vapor deposition was studied. A growth interruption method was used to determine the in situ growth rate. The formation of a compact scale contaminant layer around the catalyst hinders the diffusion of the reactant species required to grow the CNTs. The high temperature metal oxidation behavior observed using parabolic curve fitting was attributed to the size dependent catalyst activity. The parabolic rate constant shows linear dependence on the catalyst size. Details of the analysis are presented.

© 2010 American Institute of Physics

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0003-6951 (print)  
1077-3118 (online)

For access to fully linked references, you need to log in.
    O. A. Louchev, T. Laude, Y. Sato, and H. Kanda, J. Chem. Phys. 118, 7622 (2003)JCPSA6000118000016007622000001.

    S. P. Patole, J. H. Park, T. Y. Lee, J. H. Lee, A. S. Patole, and J. B. Yoo, Appl. Phys. Lett. 93, 114101 (2008)APPLAB000093000011114101000001.


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