Reaction Products of Co Catalysts in Ethanol-Chemical-Vapor-Deposition Ambient at Low-Pressure Studied by in situ X-Ray Photoelectron Spectroscopy
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概要
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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. The carbon nanotubes were grown in an ethanol ambient at about $4\times 10^{-2}$ Torr, a relatively low pressure that was used because we needed to subsequently measure photoelectrons under ultrahigh vacuum. We found that almost all of the Co particles are metallic after the growth. This shows that the metallic state is stable for Co under low-pressure ethanol ambient in our growth condition for carbon nanotubes.
- INSTITUTE OF PURE AND APPLIED PHYSICSの論文
- 2007-02-25
著者
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KOBAYASHI Yoshihiro
NTT Basic Research Laboratories
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MAEDA Fumihiko
NTT Basic Research Laboratories
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Homma Yoshikazu
Department Of Physics Tokyo University Of Science
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TAKAGI Daisuke
Department of Biological and Environmental Science, Faculty of Agriculture, Graduate School of Agricultural Science, Kobe University
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Suzuki Satoru
NTT Basic Research Laboratories
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Suzuki Satoru
NTT Basic Research Laboratories, NTT Corporation, and CREST, JST, 3-1 Morinosato-Wakamiya, Atsugi, Kanagawa 243-0198, Japan
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Homma Yoshikazu
Department of Physics, Tokyo University of Science and CREST, JST, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
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Maeda Fumihiko
NTT Basic Research Laboratories, NTT Corporation, and CREST, JST, 3-1 Morinosato-Wakamiya, Atsugi, Kanagawa 243-0198, Japan
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