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Rui He
University of Northern Iowa
"Raman spectroscopy of CVD graphene"
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Friday January 11, 2013
3:30pm PHYS 203
Refreshments are served at 3:00 p.m. in Physics room 242.
http://www.physics.uni.edu/rui-heChemical vapor deposition (CVD) on transition metal substrates is one of the most convenient methods for growing large area graphene. The growth on a Cu substrate is of particular interest since the catalytic growth process is self-limiting and in most cases produces a single layer. In this talk I will present our studies of CVD graphene on Cu single crystal surfaces with different orientations, CVD graphene doped with nitrogen atoms, and CVD bilayer graphene. By using Raman spectroscopy, we have characterized the strain effect of graphene on Cu single crystal surfaces, the electronic homogeneity of nitrogen doped graphene, and the low energy vibrational properties in bilayer graphene. These studies reveal that Raman spectroscopy is a versatile tool for probing the fundamental properties of graphene.