Controlling the orientation, edge geometry, and thickness of chemical vapor deposition graphene.
We report that the shape, orientation, edge geometry, and thickness of chemical vapor deposition graphene domains can be controlled by the crystallographic orientations of Cu substrates. Under low-pressure conditions, single-layer graphene domains align with zigzag edges parallel to a single <101> direction on Cu(111) and Cu(101), while bilayer domains align to two directions on Cu(001). Under atmospheric pressure conditions, hexagonal domains also preferentially align. This discovery can be exploited to generate high-quality, tailored graphene with controlled domain thickness, orientations, edge geometries, and grain boundaries.
Department of Materials, University of Oxford, Oxford OX1 3PH, United Kingdom.
Adrian T
AT
Murdock
Antal
A
Koos
T Ben
TB
Britton
Lothar
L
Houben
Tim
T
Batten
Tong
T
Zhang
Angus J
AJ
Wilkinson
Rafal E
RE
Dunin-Borkowski
Christina E
CE
Lekka
Nicole
N
Grobert