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Surface Alloying and Surfactant Action of Sb ON Ag (111)

Published online by Cambridge University Press:  15 February 2011

Sabrina Oppo ,
Vincenzo Fiorentini  and
Matthias Scheffler
Sabrina Oppo
Affiliation:
Dipartimento di Scienze Fisiche, Università di Cagliari, 1–09124 Cagliari, Italy Fritz-Haber-Institut der Max-Planck-Gesellschaft, D-14195 Berlin, Germany
Vincenzo Fiorentini
Affiliation:
Dipartimento di Scienze Fisiche, Università di Cagliari, 1–09124 Cagliari, Italy Fritz-Haber-Institut der Max-Planck-Gesellschaft, D-14195 Berlin, Germany
Matthias Scheffler
Affiliation:
Fritz-Haber-Institut der Max-Planck-Gesellschaft, D-14195 Berlin, Germany
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Abstract

We report ab initio calculations for Sb and Ag adsorption on Ag (111): evidence is found for substitutional adsorption and surface segregation of Sb, and for the formation of a disordered surface Sb-Ag alloy. The average diffusion barrier for Ag is enhanced on Sb-covered Ag (111), which favors the formation of a high density of small-sized islands: this is suggested to be the cause of the surfactant action of Sb on Ag reported recently.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 317: Symposium B – Mechanisms of Thin Film Evolution , 1993 , 323
Copyright
Copyright © Materials Research Society 1994

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References

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