Field electron emission form single-walled carbon nanotubes with deposited cesium atoms

It has been found that deposition g of cesium atoms on single-walled carbon nanotubes covered with potassium atoms not only drastically increases emission current but also considerably changes the shape of current-voltage characteristics of field electron emission, namely, the characteristics become...

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Bibliographic Details
Published in:Physics of the solid state 2011-07, Vol.53 (7), p.1504-1508
Main Authors: Musatov, A. L., Izrael’yants, K. R., Chirkova, E. G., Krestinin, A. V.
Format: Article
Language:English
Subjects:
Cesium
Electric properties
Electric waves
Electromagnetic radiation
Electromagnetic waves
Low-Dimensional Systems
Nanotubes
Physics
Physics and Astronomy
Solid State Physics
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Summary:It has been found that deposition g of cesium atoms on single-walled carbon nanotubes covered with potassium atoms not only drastically increases emission current but also considerably changes the shape of current-voltage characteristics of field electron emission, namely, the characteristics become nonlinear in Fowler-Nordheim coordinates. It has been assumed that this effect is associated with the fact that field electron emission in these layers comes from single-walled carbon nanotubes, which have p -type conductivity after potassium treatment, while deposition of cesium leads to the formation of p-n junctions near nanotube tips. Part of the applied voltage drops in p-n junction, thus causing a nonlinearity of current-voltage characteristics.
ISSN:1063-7834
1090-6460
DOI:10.1134/S1063783411070201