Effect of NH3 and thickness of catalyst on growth of carbon nanotubes using thermal chemical vapor deposition

Yoon Taek Jang; Jin Ho Ahn; Yun-Hi Lee; Byeong Kwon Ju

doi:10.1016/S0009-2614(03)00501-3

Effect of NH₃ and thickness of catalyst on growth of carbon nanotubes using thermal chemical vapor deposition

Yoon Taek Jang, Jin Ho Ahn, Yun-Hi Lee, Byeong Kwon Ju

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

75 Citations (Scopus)

Abstract

The growth behavior of carbon nanotubes synthesized from C₂H₂ using thermal chemical vapor deposition method has been investigated. The formation of catalytic cobalt nanoparticles was much enhanced when using NH₃ as the environment gas, whereas NH₃ introduced during nanotubes growth does not play a key role in growing the vertically aligned nanotubes. The role of NH₃ is to obtain the high density of nucleation sites for nanotube growth by inhibiting amorphous carbon generation in the initial stage of synthesis. We found unexpected behavior in terms of the length and growth time during nanotube growth. The length of the nanotubes is inversely proportional to the size of nanoparticle just in the initial stages of growth and thick catalyst.

Original language	English
Pages (from-to)	745-749
Number of pages	5
Journal	Chemical Physics Letters
Volume	372
Issue number	5-6
DOIs	https://doi.org/10.1016/S0009-2614(03)00501-3
Publication status	Published - 2003 May 6

Bibliographical note

Funding Information:
This work was partially supported by Contract No. 2M12800 and IMT 2000 Nano Technology Development Program of the Ministry of Commerce, Industry and Energy.

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

Access to Document

10.1016/S0009-2614(03)00501-3

Cite this

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title = "Effect of NH3 and thickness of catalyst on growth of carbon nanotubes using thermal chemical vapor deposition",

abstract = "The growth behavior of carbon nanotubes synthesized from C2H2 using thermal chemical vapor deposition method has been investigated. The formation of catalytic cobalt nanoparticles was much enhanced when using NH3 as the environment gas, whereas NH3 introduced during nanotubes growth does not play a key role in growing the vertically aligned nanotubes. The role of NH3 is to obtain the high density of nucleation sites for nanotube growth by inhibiting amorphous carbon generation in the initial stage of synthesis. We found unexpected behavior in terms of the length and growth time during nanotube growth. The length of the nanotubes is inversely proportional to the size of nanoparticle just in the initial stages of growth and thick catalyst.",

author = "Jang, {Yoon Taek} and Ahn, {Jin Ho} and Yun-Hi Lee and Ju, {Byeong Kwon}",

note = "Funding Information: This work was partially supported by Contract No. 2M12800 and IMT 2000 Nano Technology Development Program of the Ministry of Commerce, Industry and Energy.",

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T1 - Effect of NH3 and thickness of catalyst on growth of carbon nanotubes using thermal chemical vapor deposition

AU - Jang, Yoon Taek

AU - Ahn, Jin Ho

AU - Lee, Yun-Hi

AU - Ju, Byeong Kwon

N1 - Funding Information: This work was partially supported by Contract No. 2M12800 and IMT 2000 Nano Technology Development Program of the Ministry of Commerce, Industry and Energy.

PY - 2003/5/6

Y1 - 2003/5/6

N2 - The growth behavior of carbon nanotubes synthesized from C2H2 using thermal chemical vapor deposition method has been investigated. The formation of catalytic cobalt nanoparticles was much enhanced when using NH3 as the environment gas, whereas NH3 introduced during nanotubes growth does not play a key role in growing the vertically aligned nanotubes. The role of NH3 is to obtain the high density of nucleation sites for nanotube growth by inhibiting amorphous carbon generation in the initial stage of synthesis. We found unexpected behavior in terms of the length and growth time during nanotube growth. The length of the nanotubes is inversely proportional to the size of nanoparticle just in the initial stages of growth and thick catalyst.

AB - The growth behavior of carbon nanotubes synthesized from C2H2 using thermal chemical vapor deposition method has been investigated. The formation of catalytic cobalt nanoparticles was much enhanced when using NH3 as the environment gas, whereas NH3 introduced during nanotubes growth does not play a key role in growing the vertically aligned nanotubes. The role of NH3 is to obtain the high density of nucleation sites for nanotube growth by inhibiting amorphous carbon generation in the initial stage of synthesis. We found unexpected behavior in terms of the length and growth time during nanotube growth. The length of the nanotubes is inversely proportional to the size of nanoparticle just in the initial stages of growth and thick catalyst.

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