This article is cited in 2 papers

Cesium adsorption induced inversion of the field electron emission from tungsten covered with nanostructural carbon

D. P. Bernadskii, V. G. Pavlov

Ioffe Institute, St. Petersburg

Abstract: It has been established that the field electron emission from an amorphous carbon film containing graphite nanoclusters exhibits inversion upon the adsorption of cesium atoms on the sample surface. The phenomenon consists in the disappearance of electron emission from graphite nanoclusters, which were the local emission centers prior to the metal adsorption, and the appearance of homogeneous emission from the amorphous carbon surface not emitting before that. The observed effect is explained using notions of the surface diffusion of cesium in an inhomogeneous electric field, cesium intercalation into graphite nanoclusters, and the related reversal of the dipole moment upon a change in the electric field direction.

Received: 06.03.2010

 English version: Technical Physics Letters, 2010, 36:7, 642–644

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