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Surface Reactions of Metal Catalysts in Ethanol-CVD Ambient at Low-pressure Studied by in-situ Photoelectron Spectroscopy

Published online by Cambridge University Press:  01 February 2011

Fumihiko Maeda ,
Satoru Suzuki ,
Yoshihiro Kobayashi ,
Daisuke Takagi  and
Yoshikazu Homma
Fumihiko Maeda
Affiliation:
[email protected], Nippon Telegraph and Telephone Corporation, NTT Basic Research Laboratories, 3-1 Morinosato-Wakamiya, Atsugi-shi, Kanagawa, 225-0015, Japan, +81-46-240-3423, +81-46-240-4711
Satoru Suzuki
Affiliation:
[email protected], NTT Corporation, and CREST, JST, NTT Basic Research Laboratories, 3-1 Morinosato-Wakamiya, Atsugi-shi, Kanagawa, 243-0198, Japan
Yoshihiro Kobayashi
Affiliation:
[email protected], NTT Corporation, and CREST, JST, NTT Basic Research Laboratories, 3-1 Morinosato-Wakamiya, Atsugi-shi, Kanagawa, 243-0198, Japan
Daisuke Takagi
Affiliation:
[email protected], Tokyo University of Science, and CREST, JST, Department of Physics, 1-3 Kagurazaka, Shinjuku, Tokyo, 162-8601, Japan
Yoshikazu Homma
Affiliation:
[email protected], Tokyo University of Science, and CREST, JST, Department of Physics, 1-3 Kagurazaka, Shinjuku, Tokyo, 162-8601, Japan
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Abstract

We succeeded in growing carbon nanotubes in a photoelectron spectroscopy analysis system using thermal chemical vapor deposition and analyzed the chemical states of the Co catalysts by in-situ x-ray photoelectron spectroscopy before and after the growth. We found that almost all of the Co particles are metallic after the growth in both cases; Co particles are formed from a Co oxide thin film and a metallic Co thin film. This shows that the metallic state is stable for Co under low-pressure ethanol ambient in our growth condition for carbon nanotubes.

Keywords

chemical vapor deposition (CVD) (chemical reaction)x-ray photoelectron spectroscopy (XPS)Co
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 963: Symposium Q – Nanowires and Carbon Nanotubes – Science and Applications , 2006 , 0963-Q05-04
Copyright
Copyright © Materials Research Society 2007

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References

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