Title: Field emission from vertically aligned few-layer graphene
Authors: Malesevic, Alexander ×
Kemps, Raymond
Vanhulsel, Annick
Chowdhury, Manish Pal
Volodine, Alexandre
Van Haesendonck, Christian #
Issue Date: Oct-2008
Publisher: American Institute of Physics
Series Title: Journal of Applied Physics vol:104 issue:8 pages:1-5
Article number: 084301
Abstract: The electric field emission behavior of vertically aligned few-layer graphene was studied in a parallel plate-type setup. Few-layer graphene was synthesized in the absence of any metallic catalyst by microwave plasma enhanced chemical vapor 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 few-layer graphene is found to be a good field emitter, characterized by turn-on fields as low as 1 V/mu m and field amplification factors up to several thousands. We observe a clear dependence of the few-layer graphene field emission behavior on the synthesis parameters: Hydrogen is identified as an efficient etchant to improve field emission, and samples grown on titanium show lower turn-on field values and higher amplification factors when compared to samples grown on silicon. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.2999636]
ISSN: 0021-8979
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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