Abstract
Graphene and h-BN are grown by chemical vapor deposition in ultra high
vacuum conditions on the Pt(110) surface. Scanning tunneling microscopy
measurements and low-energy electron diffraction data indicate that
graphene forms a variety of differently oriented incommensurate domains
although with a strong preference to align its direction with the direction of Pt. Meanwhile, h-BN exhibits a c(8 × 10)
commensurate superstructure, which presents a high level of defectivity
that implies local variation of the periodicity (i.e. mixed c(8 × 10) and c(8 × 12)
patches) and the introduction of local defects. The combination of
advanced photoemission spectroscopy data (angle-resolved photoemission
spectroscopy from the valence band) and ab initio calculations
indicates that both 2D materials interact weakly with the substrate:
graphene exhibits neutral doping and is morphologically flat, even if it
nucleates on the relatively highly corrugated rectangular (110)
surface. In the case of h-BN, the interaction is slightly stronger and
is characterized by a small electron transfer from surface Pt atoms to
nitrogen atoms. The (110) termination of Pt is therefore a quite
interesting surface for the growth of 2D materials because given its low
symmetry, it may favor the growth of selectively oriented domains but
does not affect their pristine electronic properties.
Original language | English |
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Article number | 485201 |
Number of pages | 11 |
Journal | Nanotechnology |
Volume | 29 |
Issue number | 48 |
Early online date | 1 Oct 2018 |
DOIs | |
Publication status | Published - 30 Nov 2018 |
Keywords
- h-BN
- LEE
- STM
- PES
- DFT
- Pt(110)
- graphene