Microscopic characterisation of suspended graphene grown by chemical vapour deposition.
We present a multi-technique characterisation of graphene grown by chemical vapour deposition (CVD) and thereafter transferred to and suspended on a grid for transmission electron microscopy (TEM). The properties of the electronic band structure are investigated by angle-resolved photoelectron spectromicroscopy, while the structural and crystalline properties are studied by TEM and Raman spectroscopy. We demonstrate that the suspended graphene membrane locally shows electronic properties comparable with those of samples prepared by micromechanical cleaving of graphite. Measurements show that the area of high quality suspended graphene is limited by the folding of the graphene during the transfer.
Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747AG Groningen, The Netherlands.
Luca
L
Bignardi
Willem F
WF
van Dorp
Stefano
S
Gottardi
Oleksii
O
Ivashenko
Pavel
P
Dudin
Alexei
A
Barinov
Jeff Th M
JT
De Hosson
Meike
M
Stöhr
Petra
P
Rudolf