Periodic ripples on thermally-annealed graphene on Cu (110)-reconstruction or moiré pattern?
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Authors
Publication Date
2018-11Journal Title
Nanotechnology
ISSN
0957-4484
Volume
29
Issue
45
Pages
455705
Language
eng
Type
Article
This Version
AM
Physical Medium
Print-Electronic
Metadata
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Durkan, C. (2018). Periodic ripples on thermally-annealed graphene on Cu (110)-reconstruction or moiré pattern?. Nanotechnology, 29 (45), 455705. https://doi.org/10.1088/1361-6528/aadd6d
Abstract
We have used Ultrahigh Vacuum (UHV) Scanning tunneling microscopy (STM) to investigate the effect of thermal annealing of graphene grown by chemical vapour deposition (CVD) on a Cu(110) foil. We show that the annealing appears to induce a reconstruction of the Cu surface along the [210] direction, with a period of 1.43 nm. Such reconstructions have been ascribed to the tensile strain induced in the Cu surface by differential thermal expansion of it relative to the graphene overlayer, but we show that it is in fact a Moiré pattern due to interference between the graphene and the underlying atomic lattice as evidenced by the appearance of an odd-even transition only observed due to mis-orientation of the top layer of a crystal. This highlights that the analysis of STM measurements of graphene on metal surfaces should take such interference into account and that the graphene-Cu interface is more complex than previously thought.
Identifiers
External DOI: https://doi.org/10.1088/1361-6528/aadd6d
This record's URL: https://www.repository.cam.ac.uk/handle/1810/274485
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International
Licence URL: http://creativecommons.org/licenses/by-nc-nd/4.0/