Raman and optical characterization of multilayer turbostratic graphene grown via chemical vapor deposition

Details Raman and optical characterization of multilayer turbostratic graphene grown via chemical vapor deposition Raman and optical characterization of multilayer turbostratic graphene grown via chemical vapor deposition

2010-11-07

arxiv.org/abs/1011.1683v5

J. Appl. Phys. 110, 013720 (2011); doi:10.1063/1.3605545

Physics

Condensed Matter

Materials Science

13 pages, 4 figures + Supplemental Material of 11 pages, 4 figures

Scientific paper

10.1063/1.3605545

We synthesize large-area graphene via atmospheric-pressure (AP) chemical vapor deposition (CVD) on copper, and transfer to SiO2 wafers. In contrast to low-pressure (LP) CVD on copper, optical contrast and atomic force microscopy measurements show AP-CVD graphene contains significant multi-layer areas. Raman spectroscopy always shows a single Lorentzian 2D peak, however systematic differences are observed in the 2D peak energy, width, and intensity for single- and multi-layer regions. We conclude that graphene multi-layers grown by AP-CVD on Cu are rotationally disordered.

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