Crystal Orientation Dependent Oxidation Modes at the Buried Graphene–Cu Interface

Philipp Braeuninger-Weimer, Oliver Burton, Patrick Zeller, Matteo Amati, Luca Gregoratti, Robert S Weatherup & Stephan Hofmann
We combine spatially-resolved scanning photoelectron spectroscopy with confocal Raman and optical microscopy to reveal how the oxidation of the buried graphene-Cu interface relates to the Cu crystallographic orientation. We analyse over one hundred different graphene covered Cu (high and low index) orientations exposed to air for 2 years. Four general oxidation modes are observed, that can be mapped as regions onto the polar plot of Cu surface orientations. These modes are: 1) complete, 2) irregular,...
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