Heteroepitaxial System ofh-BN/Monolayer Graphene on Ni(111)

T. Tanaka, A. Itoh, K. Yamashita, E. Rokuta and C. Oshima
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T. Tanaka: Kagami Memorial Laboratory for Materials Science and Technology, Waseda University, 2-8-26, Nishi-waseda, Shinjuku, Tokyo 169-0051, Japan;
A. Itoh: Kagami Memorial Laboratory for Materials Science and Technology, Waseda University, 2-8-26, Nishi-waseda, Shinjuku, Tokyo 169-0051, Japan;
K. Yamashita: Kagami Memorial Laboratory for Materials Science and Technology, Waseda University, 2-8-26, Nishi-waseda, Shinjuku, Tokyo 169-0051, Japan;
E. Rokuta: Kagami Memorial Laboratory for Materials Science and Technology, Waseda University, 2-8-26, Nishi-waseda, Shinjuku, Tokyo 169-0051, Japan;
C. Oshima: Kagami Memorial Laboratory for Materials Science and Technology, Waseda University, 2-8-26, Nishi-waseda, Shinjuku, Tokyo 169-0051, Japan;

Surface Review and Letters (SRL), 2003, vol. 10, issue 04, 697-703

Abstract: A heteroepitaxial system ofh-BN/monolayer graphene on Ni(111) has been investigated by means of vibrational spectroscopy, accompanied by low energy electron diffraction (LEED) and Auger electron spectroscopy (AES). The system was prepared in an epitaxial manner on a Ni(111) surface by chemical vapor deposition (CVD). We found that phonon peaks in observed spectra showed typical features of Fuchs–Kliewer (FK) phonons. The vibrational spectra ofh-BN films ranging in thickness from 0 to 8.7 monolayers have been compared with theoretical spectra based on a dielectric theory. Detailed analysis has revealed new types of phonons, of which the vibrational amplitudes are localized at edges ofh-BN nanocrystals. In addition, we have observed subsidence phenomena of the graphene andh-BN layers into Ni substrate at elevated temperatures.

Keywords: h-BN; graphite; nanocrystals; HREELS; 68.35.Ja; 68.55.Jk; 63.20.Pv; 79.20.Uv (search for similar items in EconPapers)
Date: 2003
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DOI: 10.1142/S0218625X03005451

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