Thickness effect of nanosized thin-film iron dot on growth of multiwall carbon nanotubes

Y. R. Ma; M. S. Wong; C. H. See; K. W. Cheng; J. C. Wu; Y. Liou; Y. D. Yao

doi:10.1063/1.1853151

Thickness effect of nanosized thin-film iron dot on growth of multiwall carbon nanotubes

Y. R. Ma, M. S. Wong, C. H. See, K. W. Cheng, J. C. Wu, Y. Liou, Y. D. Yao

Department of Physics

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

Hot-filament chemical vapor deposition, using a mixture of methane and hydrogen, is used to grow micrometer-long multiwall carbon nanotubes (MWNTs) on 1-μm -diametric iron dots with thicknesses of 54, 40, and 20 nm. Bunches of MWNTs grow on the nanosized thin-film iron dots, and thicker iron dots have more MWNTs, because the nanosized thin-film iron dot behaves as a thin film with many catalyst nanoparticles rather than as a catalyst surface. Therefore, the thickness of the nanosized thin-film iron dot strongly dominates the MWNT growth. However, the MWNTs growing on the iron dots are 1 μm long and ~90 nm wide, indicating that the length and diameter of the MWNT are independent of the size and thickness of the iron dot. In addition, the effect of the applied electrical field on the growth of MWNTs is presented.

Original language	English
Article number	10J707
Journal	Journal of Applied Physics
Volume	97
Issue number	10
DOIs	https://doi.org/10.1063/1.1853151
Publication status	Published - 2005 May 15

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1063/1.1853151

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title = "Thickness effect of nanosized thin-film iron dot on growth of multiwall carbon nanotubes",

abstract = "Hot-filament chemical vapor deposition, using a mixture of methane and hydrogen, is used to grow micrometer-long multiwall carbon nanotubes (MWNTs) on 1-μm -diametric iron dots with thicknesses of 54, 40, and 20 nm. Bunches of MWNTs grow on the nanosized thin-film iron dots, and thicker iron dots have more MWNTs, because the nanosized thin-film iron dot behaves as a thin film with many catalyst nanoparticles rather than as a catalyst surface. Therefore, the thickness of the nanosized thin-film iron dot strongly dominates the MWNT growth. However, the MWNTs growing on the iron dots are 1 μm long and ~90 nm wide, indicating that the length and diameter of the MWNT are independent of the size and thickness of the iron dot. In addition, the effect of the applied electrical field on the growth of MWNTs is presented.",

author = "Ma, {Y. R.} and Wong, {M. S.} and See, {C. H.} and Cheng, {K. W.} and Wu, {J. C.} and Y. Liou and Yao, {Y. D.}",

year = "2005",

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T1 - Thickness effect of nanosized thin-film iron dot on growth of multiwall carbon nanotubes

AU - Ma, Y. R.

AU - Wong, M. S.

AU - See, C. H.

AU - Cheng, K. W.

AU - Wu, J. C.

AU - Liou, Y.

AU - Yao, Y. D.

PY - 2005/5/15

Y1 - 2005/5/15

N2 - Hot-filament chemical vapor deposition, using a mixture of methane and hydrogen, is used to grow micrometer-long multiwall carbon nanotubes (MWNTs) on 1-μm -diametric iron dots with thicknesses of 54, 40, and 20 nm. Bunches of MWNTs grow on the nanosized thin-film iron dots, and thicker iron dots have more MWNTs, because the nanosized thin-film iron dot behaves as a thin film with many catalyst nanoparticles rather than as a catalyst surface. Therefore, the thickness of the nanosized thin-film iron dot strongly dominates the MWNT growth. However, the MWNTs growing on the iron dots are 1 μm long and ~90 nm wide, indicating that the length and diameter of the MWNT are independent of the size and thickness of the iron dot. In addition, the effect of the applied electrical field on the growth of MWNTs is presented.

AB - Hot-filament chemical vapor deposition, using a mixture of methane and hydrogen, is used to grow micrometer-long multiwall carbon nanotubes (MWNTs) on 1-μm -diametric iron dots with thicknesses of 54, 40, and 20 nm. Bunches of MWNTs grow on the nanosized thin-film iron dots, and thicker iron dots have more MWNTs, because the nanosized thin-film iron dot behaves as a thin film with many catalyst nanoparticles rather than as a catalyst surface. Therefore, the thickness of the nanosized thin-film iron dot strongly dominates the MWNT growth. However, the MWNTs growing on the iron dots are 1 μm long and ~90 nm wide, indicating that the length and diameter of the MWNT are independent of the size and thickness of the iron dot. In addition, the effect of the applied electrical field on the growth of MWNTs is presented.

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