Synthesis of carbon nanotube films by thermal CVD in the presence of supported catalyst particles. Part II: the nanotube film

Yao, Yiming, 1957 (author): Chalmers tekniska högskola,Chalmers University of Technology

Falk, Lena, 1956 (author): Chalmers tekniska högskola,Chalmers University of Technology

Morjan, Raluca Elena, 1976 (author): Chalmers tekniska högskola,Chalmers University of Technology

Nerushev, O.A. (author): Chalmers tekniska högskola,Chalmers University of Technology

Campbell, Eleanor E B, 1960 (author): Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU),University of Gothenburg

(creator_code:org_t)

2004
2004
English.
In: Journal of Materials Science: Materials in Electronics. ; 15:9, s. 583-594

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Abstract Subject headings

Carbon nanotube films have been grown at 750° and 900 °C by thermal chemical vapor deposition (CVD) with acetylene (C2H2) and hydrogen on silicon (0 0 2) wafers supporting preformed (Fe,Si)3O4 particles. The reduction of the (Fe,Si)3O4 particles during CVD at 750 °C was accompanied by a disintegration leading to the formation of a high density of smaller (predominantly 5–15 nm) iron silicide (α1-Fe2Si) particles that catalyzed the growth of a dense and aligned multi-wall carbon nanotube film. The tubes did not contain any inclusions apart from the catalytic particles present in the bottom part of the film, and it was concluded that the nanotubes grew via a “base-growth” mechanism. CVD at 900 °C resulted in a random growth of predominantly multi-wall carbon nanotubes. The film contained an increased number of amorphous carbon, or graphite, clusters containing particles that had been carbonized, the larger ones to cementite, θ-Fe3C. Nanotubes were observed to grow from some of these clusters. Multi-wall carbon nanotube tips contained after CVD at 900 °C encapsulated θ-Fe3C, or in a few cases α- or γ-Fe, particles.

By the author/editor: Yao, Yiming, 195 ...; Falk, Lena, 1956; Morjan, Raluca E ...; Nerushev, O.A.; Campbell, Eleano ...

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Materials Engine ...; and Other Materials ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Electrical Engin ...; and Other Electrical ...

By the university: University of Gothenburg; Chalmers University of Technology

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