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- Title
Effect of Purification on the Electron Structure and Field Emission Characteristics of a Carbonaceous Material Containing Single-Wall Carbon Nanotubes.
- Authors
Okotrub, A. V.; Bulusheva, L. G.; Gusel'nikov, A. V.
- Abstract
A carbonaceous material containing single-wall carbon nanotubes (SWNTs) has been synthesized by arc-discharge evaporation of graphite with a catalytic additive of nickel and cobalt powders. The synthesized SWNTs were purified from an amorphous carbon component (soot) and the catalyst particles by boiling in nitric acid. A comparison of the X-ray fluorescence spectra measured before and after this treatment showed that acid etching significantly decreased the content of soot in the material. The material enriched with SWNTs is characterized by a reduced threshold for the appearance of the field emission current, which is explained by a decrease in the screening effect of soot. The current–voltage characteristics of SWNTs exhibit a hysteresis, which is suggested to be due to the adsorption of molecules and radicals on the surface and at the ends of carbon nanotubes. © 2004 MAIK “Nauka/Interperiodica”.
- Subjects
NANOTUBES; TUBES; FULLERENES; CARBON; FIELD emission; ELECTRON emission
- Publication
Journal of Experimental & Theoretical Physics, 2004, Vol 99, Issue 6, p1244
- ISSN
1063-7761
- Publication type
Article
- DOI
10.1134/1.1854812