Abstract
AbstractFloating‐bridge structures of graphene with ionic‐liquid gate have been fabricated. After removing the SiO2 layer under the graphene channel and introduction of ionic liquid, the ionic liquid under the suspended‐graphene channel contacts with an exposed back‐gate electrode, resulting in formation of the floating‐bridge structures. Owing to elimination of the interaction with SiO2 layers and the electrical double layer in the ionic liquid, the floating‐bridge bilayer graphene devices have the on/off ratio of 20 in a conductance when the back‐gate voltage of only 2 V was applied. The floating‐bridge structures of graphene on the ionic liquid operate with high performance by small gate voltage. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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