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  Carbon nanotube films grown by laser-assisted chemical vapor deposition

Rohmund, F., Morjan, R. E., Ledoux, G., Huisken, F., & Alexandrescu, R. (2002). Carbon nanotube films grown by laser-assisted chemical vapor deposition. Journal of Vacuum Science & Technology B, 20(3), 802-811.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-178F-A Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-1790-4
Genre: Journal Article

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Rohmund, F.1, Author
Morjan, R. E., Author
Ledoux, G., Author
Huisken, F.2, Author              
Alexandrescu, R., Author
Affiliations:
1Max Planck Society, ou_persistent13              
2Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2063285              

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 Abstract: Films of pure high-quality multiwall carbon nanotubes are grown by laser-assisted thermal chemical vapor deposition in a cold wall reactor. A CO₂ laser is used to locally heat a substrate on which nanotubes are grown, employing the catalytic activity of iron nanoparticles. Two kinds of experiments are reported: In a two-step mode, catalytic iron particles and solid carbon are deposited separately, leading to the formation of homogeneous films of nonaligned pure multiwall nanotubes (MWNTs). The role of gas phase heating was investigated by the addition of a sensitizing molecule that absorbs the laser radiation. It is found that large-volume gas phase heating is not needed for the synthesis of high-quality nanotube films. Focused laser radiation allows growth of locally defined nanotube films. In a second set of experiments, iron and carbon are deposited simultaneously. Films of vertically aligned MWNTs of extremely high packing density were produced in this mode under very lean hydrocarbon supply conditions. (C) 2002 American Vacuum Society.

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Language(s): eng - English
 Dates: 2002-05
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: eDoc: 13448
ISI: 000176358300009
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Title: Journal of Vacuum Science & Technology B
  Alternative Title : J. Vac. Sci. Technol. B
Source Genre: Journal
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Pages: - Volume / Issue: 20 (3) Sequence Number: - Start / End Page: 802 - 811 Identifier: ISSN: 1071-1023