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The energy of fracture of a film of carbon monoxide adsorbed on a tungsten single crystal surface

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Abstract

The adsorption and desorption of carbon monoxide were studied on a tungsten single crystal in a field electron microscope. The most interesting effects were observed for the CO desorption from the crystal surface regions containing the {100} W cubic faces. In the course of desorption from these regions, the adsorbed electropositive film, retaining sharp boundaries, shrank toward the <100> poles. The desorption energy value (3.4±0.1 eV), determined using the Arrhenius plots for the boundary velocity, is indicative of a considerable strength of the adsorbed CO film. Behavior of the CO phase desorbing from the {100} W regions can be consistently explained by assuming that this phase comprises a network of adsorbed CO dipoles oriented perpendicularly to the crystal surface, with the carbon atoms facing vacuum.

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Authors and Affiliations

  1. Ioffe Physicotechnical Institute, Russian Academy of Sciences, St. Petersburg, 194021, Russia

    O. L. Golubev & V. N. Shrednik

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  1. O. L. Golubev
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  2. V. N. Shrednik
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Translated from Pis’ma v Zhurnal Tekhnichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Fiziki, Vol. 26, No. 12, 2000, pp. 40–45.

Original Russian Text Copyright © 2000 by Golubev, Shrednik.

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Golubev, O.L., Shrednik, V.N. The energy of fracture of a film of carbon monoxide adsorbed on a tungsten single crystal surface. Tech. Phys. Lett. 26, 514–516 (2000). https://doi.org/10.1134/1.1262895

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