Title: Comparative Field Emission from Vertically Aligned Few-Layer Graphene and Carbon Nanotubes
Authors: Bellucci, Stefano ×
Malesevic, Alexander
Micciulla, Federico
Sacco, Immacolata
Kemps, Raymond
Vanhulsel, Annick
Van Haesendonck, Chris #
Issue Date: Dec-2011
Publisher: Amer scientific publishers
Series Title: Nanoscience and nanotechnology letters vol:3 issue:6 pages:907-912
Abstract: A comparative study of the electric field emission behaviour of vertically aligned few-layer graphene and carbon nanotubes was evaluated in a parallel plate type setup. Few-layer graphene was synthesized in the absence of any metallic catalyst by microwave plasma enhanced chemical vapour deposition with gas mixtures of methane and hydrogen. The deposit consists of nanostructures that are several micrometers wide, highly crystalline stacks of four to six atomic layers of graphene, aligned vertically to the substrate surface in a high density network. The electric field emission of few-layer graphene was compared to the emission of single-walled carbon nanotubes, as grown multi-walled carbon nanotubes and processed multi-walled carbon nanotubes in the form of buckypaper. The field emission of few-layer graphene is found to be comparable to buckypaper, since both materials are characterized by turn-on fields as low as 2 V/mu m and field amplification factors up to several thousands. As grown single-walled and multi-walled carbon nanotubes reveal remarkable better field emission behaviour when compared to few-layer graphene, with turn-on fields below 1 V/mu m and field amplification factors up to several times the value for few-layer graphene.
ISSN: 1941-4900
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Solid State Physics and Magnetism Section
× corresponding author
# (joint) last author

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