Vacuum annealing formation of graphene on diamond C(111) surfaces studied by real-time photoelectron spectroscopy

Shuichi Ogawa, Takatoshi Yamada, Shinji Ishizduka, Akitaka Yoshigoe, Masataka Hasegawa, Yuden Teraoka, Yuji Takakuwa

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14 Citations (Scopus)

Abstract

To clarify the graphene formation process on a diamond C(111) surface, changes in the chemical bonding state caused by annealing in vacuum were investigated by photoelectron spectroscopy using synchrotron radiation. It was difficult to study the formation of sp2-bonded carbon atoms on a diamond C(111) surface using photoelectron spectroscopy because the peak of the sp2 component overlaps the peak of the surface sp2 component as a result of the 2 × 1 reconstruction. Therefore, we focused on the shift in the C 1s photoelectron spectra and energy loss spectra caused by band bending depending on the temperature. As a result, we found that graphitization on the diamond C(111) surface began at approximately 1120 K, which was lower than that for a SiC substrate. The obtained photoelectron spectra indicated that a buffer layer composed of sp2-bonded carbon atoms existed at the interface between graphene and the diamond C(111) surface.

Original languageEnglish
Article number11PF02
JournalJapanese journal of applied physics
Volume51
Issue number11 PART2
DOIs
Publication statusPublished - 2012 Nov

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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