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Effects of a modular two-step ozone-water and annealing process on silicon carbide graphene
Uppsala University, Sweden.
Lund University, Sweden.
DFM, Denmark.
Swansea University, Wales.
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2014 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 105, no 8, 081602- p.Article in journal (Refereed) Published
Abstract [en]

By combining ozone and water, the effect of exposing epitaxial graphene on silicon carbide to an aggressive wet-chemical process has been evaluated after high temperature annealing in ultra high vacuum. The decomposition of ozone in water produces a number of oxidizing species, however, despite long exposure times to the aqueous-ozone environment, no graphene oxide was observed after the two-step process. The systems were comprehensively characterized before and after processing using Raman spectroscopy, core level photoemission spectroscopy, and angle resolved photoemission spectroscopy together with low energy electron diffraction, low energy electron microscopy, and atomic force microscopy. In spite of the chemical potential of the aqueous-ozone reaction environment, the graphene domains were largely unaffected raising the prospect of employing such simple chemical and annealing protocols to clean or prepare epitaxial graphene surfaces.

Place, publisher, year, edition, pages
AMER INST PHYSICS , 2014. Vol. 105, no 8, 081602- p.
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:liu:diva-112067DOI: 10.1063/1.4893781ISI: 000342753500017OAI: oai:DiVA.org:liu-112067DiVA: diva2:763785
Note

Funding Agencies|Uppsala University Quality and Renewal program for graphene; Swedish Science Foundation; Knut and Alice Wallenberg Foundation

Available from: 2014-11-17 Created: 2014-11-13 Last updated: 2017-12-05

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Yakimova, Rositsa

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