Abstract
This paper describes an experimental study on field emission characteristics of individual graphene layers for vacuum nanoelectronics. Graphene layers were prepared by mechanical exfoliation from a highly oriented pyrolyzed graphite block and placed on an insulating substrate, with the resulting field emission behavior investigated using a nanomanipulator operating inside a scanning electron microscope. A pair of tungsten tips controlled by the nanomanipulator enabled electric connection with the graphene layers without postfabrication. The maximum emitted current from the graphene layers was 170 nA and the turn-on voltage was 12.1 V.
Highlights
Field emission is a quantum mechanical tunneling phenomenon in which electrons escape from a solid surface into vacuum, as explained theoretically by R
Graphene layers were randomly distributed on cathode electrodes for field emission display applications [6, 7]
In order to understand the fundamental behavior of graphene field emission and expand its application into vacuum nanoelectronics beyond the field emission display, the characterization and analysis of field emission from an individual graphene sheet is necessary
Summary
Field emission is a quantum mechanical tunneling phenomenon in which electrons escape from a solid surface into vacuum, as explained theoretically by R. Graphene layers were randomly distributed on cathode electrodes for field emission display applications [6, 7]. Further field emission studies are required using high-quality, planar graphene structure (e.g. obtained from a highly oriented pyrolyzed graphite (HOPG) block).
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