Surface structures of graphene covered Cu (103)

TL;DR

This study investigates the surface structures of CVD graphene on Cu(103), revealing facet formation, surface reorganization through annealing, and resulting changes in graphene's lattice strain and doping levels.

Contribution

It provides new insights into the surface morphology and post-growth modifications of graphene on Cu(103), highlighting the effects of thermal annealing.

Findings

Cu(103) facets form under graphene coverage

Thermal annealing reorganizes Cu surface facets

Annealing alters graphene's lattice strain and doping

Abstract

We studied the surface structures of chemical vapor deposited (CVD) graphene on Cu(103). The graphene covered Cu surface had (103) facets parallel to the Cu[010] direction, on which triangular patterns were formed. In contrast, the bare Cu surface showed no facets. Post-growth thermal annealing in an ultra-high vacuum induced surface changes on the Cu(103) facets. The reorganization of the Cu surface by the post-growth thermal annealing led to a change in the lattice strain and hole doping level of the CVD-grown graphene.