Open Access SPECIAL ISSUE ARTICLE

Surface Chemistry Involved in Epitaxy of Graphene on 3C-SiC(111)/Si(111)

Shunsuke Abe1, Hiroyuki Handa1, Ryota Takahashi1, Kei Imaizumi1, Hirokazu Fukidome1* and Maki Suemitsu12

Author affiliations

1 Research Institute of Electrical Communication, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan

2 CREST, Japan Science and Technology Agency, Tokyo, 107-0075, Japan

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Citation and License

Nanoscale Research Letters 2010, 5:1888-1891  doi:10.1007/s11671-010-9731-x

Published: 14 August 2010

Abstract

Surface chemistry involved in the epitaxy of graphene by sublimating Si atoms from the surface of epitaxial 3C-SiC(111) thin films on Si(111) has been studied. The change in the surface composition during graphene epitaxy is monitored by in situ temperature-programmed desorption spectroscopy using deuterium as a probe (D2-TPD) and complementarily by ex situ Raman and C1s core-level spectroscopies. The surface of the 3C-SiC(111)/Si(111) is Si-terminated before the graphitization, and it becomes C-terminated via the formation of C-rich (6√3 × 6√3)R30° reconstruction as the graphitization proceeds, in a similar manner as the epitaxy of graphene on Si-terminated 6H-SiC(0001) proceeds.

Keywords:
Graphene; 3C-SiC(111); Si(111); Epitaxy; Surface termination