High-quality, large-area epitaxial graphene can be grown on metal surfaces, but its transport properties cannot be exploited because the electrical conduction is dominated by the substrate. Here we insulate epitaxial graphene on Ru(0001) by a stepwise intercalation of silicon and oxygen, and the eventual formation of a SiO2 layer between the graphene and the metal. We follow the reaction steps by X-ray photoemission spectroscopy and demonstrate the electrical insulation using a nanoscale multipoint probe technique.
Transfer-Free Electrical Insulation of Epitaxial Graphene from its Metal Substrate / Silvano, Lizzit; Rosanna, Larciprete; Paolo, Lacovig; Matteo, Dalmiglio; Orlando, Fabrizio; Baraldi, Alessandro; Lauge, Gammelgaard; Lucas, Barreto; Marco, Bianchi; Edward, Perkins; Philip, Hofmann. - In: NANO LETTERS. - ISSN 1530-6984. - ELETTRONICO. - 12:(2012), pp. 4503-4507. [10.1021/nl301614j]
Transfer-Free Electrical Insulation of Epitaxial Graphene from its Metal Substrate
ORLANDO, FABRIZIO;BARALDI, Alessandro;
2012-01-01
Abstract
High-quality, large-area epitaxial graphene can be grown on metal surfaces, but its transport properties cannot be exploited because the electrical conduction is dominated by the substrate. Here we insulate epitaxial graphene on Ru(0001) by a stepwise intercalation of silicon and oxygen, and the eventual formation of a SiO2 layer between the graphene and the metal. We follow the reaction steps by X-ray photoemission spectroscopy and demonstrate the electrical insulation using a nanoscale multipoint probe technique.Pubblicazioni consigliate
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