A research team from UCLA announce they have developed a scalable approach to fabricate high-speed graphene transistors. Back in September 2010, this team developed 300Ghz graphene transistors, making them using a nanowire as the self-aligned gate.

The new approach uses a dielectrophoresis assembly approach to precisely place nanowire gate arrays on large-area chemical vapor deposition–growth graphene (as opposed to mechanically peeled graphene flakes) to enable the rational fabrication of high-speed transistor arrays. This was made on a glass substrate. The new transistors have cut-off frequencies of over 50Ghz (typical graphene transistors made on silicon have cut-off frequencies of less then 10 Ghz).

The team used these transistors to construct radio-frequency circuits functioning up to 10 GHz.

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Versarien - Think you know graphene? Think again! Versarien - Think you know graphene? Think again!