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The current stability of field emission cathodes of carbon nanotubes under ion bombardment
Author(s) -
Bormashov Vitaly S.,
Baturin Andrey S.,
Nikolskiy Konstantin N.,
Tchesov Roman G.,
Sheshin Evgeniy P.
Publication year - 2007
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.2480
Subject(s) - cathode , work function , field electron emission , carbon nanotube , electron , desorption , ion , carbon fibers , instability , degradation (telecommunications) , work (physics) , current (fluid) , materials science , chemical physics , adsorption , analytical chemistry (journal) , nanotechnology , chemistry , atomic physics , composite material , mechanics , physics , thermodynamics , electrical engineering , chromatography , organic chemistry , layer (electronics) , quantum mechanics , engineering , composite number
The degradation mechanism of field emission cathodes based on carbon nanotubes was investigated in the presented work. Emission current instability came from the adsorption/desorption processes on the cathode surface. During the long‐time tests, periodical variation of the electron work‐function (caused by switching on and off of the cathode) was detected. A model is proposed to explain the experimentally observed variations of electron work‐function. Copyright © 2007 John Wiley & Sons, Ltd.