Large-Area Fabrication of Periodic Sub-15 nm-Width Single-Layer Graphene Nanorings

Abstract

A periodically aligned array of graphene nanorings (GRNRs) with a sub-15 nm linewidth at a pitch of 450 nm is fabricated with a large area, 9 cm 2, through conventional nanoimprint lithography coupled with sophisticated metal deposition and plasma-etching processes. The existence of the single-layer GRNRs is verified by various techniques. © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.