Deposition of diamond from a plasma jet with phenol as the carbon source

  • Itoh K
  • Morishima C
  • Ubukata K
 et al. 
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The deposition of diamond on a molybdenum substrate was studied in an Ar-H2plasma jet adding phenol (C6H5OH) as a carbon source and was compared with adding benzene (C6H6) to examine the effect of OH species on diamond deposition. Better faceted and larger crystal size diamond was deposited from the Ar-C6H5OH-H2plasma jet than from the Ar-C6H6-H2plasma jet. Furthermore, the amount of co-deposited graphite and/or amorphous carbon in the deposit from the Ar-C6H5OH-H2plasma jet was smaller than that in the deposit from the Ar-C6H6-H2plasma jet. At the beginning of the exposure to the Ar-C6H5OH-H2plasma jet, in which OH radicals were identified, the surface of the substrate was slightly oxidized. Oxide formation on the surface of the substrate by reaction with OH radicals would contribute to the purification and increase of crystal size in the diamond deposition with an Ar-C6H5OH-H2plasma jet. (C) 2000 Elsevier Science S.A. All rights reserved.

Author-supplied keywords

  • Diamond deposition
  • Direct current plasma jet
  • OH radicals
  • Phenol as a carbon source

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  • Ken Ichi Itoh

  • Chie Morishima

  • Kazunori Ubukata

  • Ashita Chiba

  • Hideo Aida

  • Osamu Matsumoto

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