Field Emission from Self-Catalyzed GaAs Nanowires
AbstractWe report observations of field emission from self-catalyzed GaAs nanowires grown on Si (111). The measurements were taken inside a scanning electron microscope chamber with a nano-controlled tungsten tip functioning as anode. Experimental data were analyzed in the framework of the Fowler-Nordheim theory. We demonstrate stable current up to 10−7 A emitted from the tip of single nanowire, with a field enhancement factor β of up to 112 at anode-cathode distance d = 350 nm. A linear dependence of β on the anode-cathode distance was found. We also show that the presence of a Ga catalyst droplet suppresses the emission of current from the nanowire tip. This allowed for the detection of field emission from the nanowire sidewalls, which occurred with a reduced field enhancement factor and stability. This study further extends GaAs technology to vacuum electronics applications. View Full-Text
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Giubileo, F.; Di Bartolomeo, A.; Iemmo, L.; Luongo, G.; Passacantando, M.; Koivusalo, E.; Hakkarainen, T.V.; Guina, M. Field Emission from Self-Catalyzed GaAs Nanowires. Nanomaterials 2017, 7, 275.
Giubileo F, Di Bartolomeo A, Iemmo L, Luongo G, Passacantando M, Koivusalo E, Hakkarainen TV, Guina M. Field Emission from Self-Catalyzed GaAs Nanowires. Nanomaterials. 2017; 7(9):275.Chicago/Turabian Style
Giubileo, Filippo; Di Bartolomeo, Antonio; Iemmo, Laura; Luongo, Giuseppe; Passacantando, Maurizio; Koivusalo, Eero; Hakkarainen, Teemu V.; Guina, Mircea. 2017. "Field Emission from Self-Catalyzed GaAs Nanowires." Nanomaterials 7, no. 9: 275.
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