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Issue 47, 2014
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The influence of intercalated oxygen on the properties of graphene on polycrystalline Cu under various environmental conditions

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Abstract

Intercalation of oxygen at the interface of graphene grown by chemical vapour deposition and its polycrystalline copper catalyst can have a strong impact on the electronic, chemical and structural properties of both the graphene and the Cu. This can affect the oxidation resistance of the metal as well as subsequent graphene transfer. Here, we show, using near ambient pressure X-ray photoelectron spectroscopy (NAP-XPS), X-ray absorption near edge spectroscopy (XANES), energy dispersive X-ray spectroscopy (EDX) and (environmental) scanning electron microscopy (ESEM) that both the oxygen intercalation and de-intercalation are kinetically driven and can be clearly distinguished from carbon etching. The obtained results reveal that a charge transfer between as grown graphene and Cu can be annulled by intercalating oxygen creating quasi-free-standing graphene. This effect is found to be reversible on vacuum annealing proceeding via graphene grain boundaries and defects within the graphene but not without loss of graphene by oxidative etching for repeated (de-)intercalation cycles.

Graphical abstract: The influence of intercalated oxygen on the properties of graphene on polycrystalline Cu under various environmental conditions

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Supplementary files

Article information


Submitted
08 Sep 2014
Accepted
23 Oct 2014
First published
23 Oct 2014

This article is Open Access

Phys. Chem. Chem. Phys., 2014,16, 25989-26003
Article type
Paper

The influence of intercalated oxygen on the properties of graphene on polycrystalline Cu under various environmental conditions

R. Blume, P. R. Kidambi, B. C. Bayer, R. S. Weatherup, Z. Wang, G. Weinberg, M. Willinger, M. Greiner, S. Hofmann, A. Knop-Gericke and R. Schlögl, Phys. Chem. Chem. Phys., 2014, 16, 25989
DOI: 10.1039/C4CP04025B

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