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Oxidation improvement of field electron emission from diamond nanomaterials
Author(s) -
Karabutov A. V.,
Gordeev S. K.,
Ralchenko V. G.,
Korchagina S. B.,
Maslakov K. I.,
Dementjev A. P.
Publication year - 2004
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.1713
Subject(s) - field electron emission , carbon fibers , diamond , auger , analytical chemistry (journal) , nanocomposite , materials science , auger electron spectroscopy , auger effect , nanomaterials , chemistry , electron , nanotechnology , composite material , atomic physics , composite number , physics , organic chemistry , quantum mechanics , nuclear physics
Porous diamond/sp 2 ‐bonded carbon nanocomposites were studied to determine how their field electron emission properties and electrical conductivity depend on composition and post‐growth treatment. It was found that a treatment enriching the nanocomposites with oxygen could significantly improve the field emission from the diamond samples. The oxidized composites exhibited lower emission threshold fields ( E th = 1–2 V µm −1 compared with E th = 4–6 V µm −1 for non‐oxidized samples) and improved emission uniformity (the number of emission sites per unit area). The composites with low sp 2 ‐bonded carbon content, i.e. the more porous samples, typically show better results. The structure of the samples was studied using a C KVV Auger spectrometer, with x‐ray excitation of Auger emission. Possible reasons for the emission improvement by oxidation in this two‐phase carbon system are discussed. Copyright © 2004 John Wiley & Sons, Ltd.
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