Regensburg 2013 – scientific programme
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DS: Fachverband Dünne Schichten
DS 28: Layer Properties: Electrical, Optical, and Mechanical Properties
DS 28.12: Talk
Thursday, March 14, 2013, 12:30–12:45, H8
Strain analysis of CVD graphene — •Gerald V. Troppenz, Marc A. Gluba, Jörg Rappich, and Norbert H. Nickel — Helmholtz-Zentrum für Materialien und Energie GmbH
Biaxial compressive strain is induced in single layer CVD graphene grown on polycrystalline copper foil. It is generated during thermal quenching by the mismatch of thermal expansion coefficients of graphene and Cu. In situ Raman spectroscopy was used to study the phonon softening of graphene’s 2D phonon mode during the transfer from Cu to thermal SiO2. By determining the strain and stress sensitivities of the 2D phonon mode of biaxial compressed CVD graphene on Cu, we quantify the strain relaxation and the residual strain.