A Study on Field Emission Characteristics of Planar Graphene Layers Obtained from a Highly Oriented Pyrolyzed Graphite Block
1 Department of Mechanical Engineering, KAIST, Daejeon, Korea
2 Department of Mechanical Engineering, Stevens Institute of Science and Technology, Hoboken, NJ, USA
Nanoscale Research Letters 2009, 4:1218-1221 doi:10.1007/s11671-009-9384-9Published: 12 July 2009
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.