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Observing graphene grow: catalyst-graphene interactions during scalable graphene growth on polycrystalline copper.

Kidambi, PR and Bayer, BC and Blume, R and Wang, ZJ and Baehtz, C and Weatherup, RS and Willinger, MG and Schloegl, R and Hofmann, S (2013) Observing graphene grow: catalyst-graphene interactions during scalable graphene growth on polycrystalline copper. Nano Lett, 13. pp. 4769-4778.

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Abstract

Complementary in situ X-ray photoelectron spectroscopy (XPS), X-ray diffractometry, and environmental scanning electron microscopy are used to fingerprint the entire graphene chemical vapor deposition process on technologically important polycrystalline Cu catalysts to address the current lack of understanding of the underlying fundamental growth mechanisms and catalyst interactions. Graphene forms directly on metallic Cu during the high-temperature hydrocarbon exposure, whereby an upshift in the binding energies of the corresponding C1s XPS core level signatures is indicative of coupling between the Cu catalyst and the growing graphene. Minor carbon uptake into Cu can under certain conditions manifest itself as carbon precipitation upon cooling. Postgrowth, ambient air exposure even at room temperature decouples the graphene from Cu by (reversible) oxygen intercalation. The importance of these dynamic interactions is discussed for graphene growth, processing, and device integration.

Item Type: Article
Uncontrolled Keywords: Carbon Copper Crystallization Graphite Nanostructures Oxygen Photoelectron Spectroscopy Surface Properties
Subjects: UNSPECIFIED
Divisions: Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:25
Last Modified: 08 Sep 2014 01:09
DOI: 10.1021/nl4023572

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