2012 12th IEEE International Conference on Nanotechnology (IEEE-NANO)

The International Conference Centre Birmingham

20-23 August 20112, Birmingham, United Kingdom

Large Single Crystals of Graphene on Melted

Copper using Chemical Vapour Deposition

Yimin A. Wu', Susannah Speller', Graham Creeth2, Jurek Sadowski3 Christopher S. Allen', Jamie H. Warner'

lDepartment of Materials, University of Oxford, Parks Road, Oxford, OXI 3PH, United Kingdom 2School of Physics & Astronomy, University of Leeds, Leeds LS2 9JT, United Kingdom. 3Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY 11973

Email: Yimin.wu@materials.ox.ac.uk

Abstract - A simple one-step method is presented for

synthesizing large single crystal graphene domains on melted

copper using atmospheric pressure chemical vapour deposition

(CVD). This is achieved by performing the reaction above the

melting point of copper (1090 0c) and using a molybdenum

support to prevent balling of the copper from dewetting. By

controlling the amount of hydrogen during growth, individual

single crystal domains of monolayer graphene greater than 200 11m are produced, determined by electron diffraction mapping.

Angular resolved photoemission spectroscopy is used to show

the graphene grown on copper exhibits a linear dispersion

relationship and has no sign of doping.

ACKNOWLEDGMENT

Y.A.W thanks fmancial support from EPSRC International Doctoral Scholarship (IDS), Wolfson China Scholarship, China Oxford Scholarship Fund and Overseas Research Scholarship. J.H.W. thanks the support from the Royal Society and BaHiol College. Research carried out in part at the Center for Functional Nanomaterials and National Synchrotron Light Source, Brookhaven National Laboratory, which are supported by the U.S. Department of Energy, Office of Basic Energy Sciences, under Contract No. DE­AC02-98CHI0886.

978-1-4673-2200-3/12/$31.00 ©2012 IEEE