Title of article :
A model of oxygen adsorption at liquid copper surfaces
Author/Authors :
Wynblatt، نويسنده , , P. and Curiotto، نويسنده , , S. and Chatain، نويسنده , , D.، نويسنده ,
Issue Information :
هفته نامه با شماره پیاپی سال 2010
Pages :
8
From page :
1369
To page :
1376
Abstract :
A model of O-adsorption at liquid metal surfaces has been constructed, using liquid Cu as an example. The modeling approach used is similar to the regular solution scheme previously used successfully for modeling the adsorption/segregation behavior of metal alloys, in that the internal energy of the system is evaluated by nearest neighbor bond energies. In the model, the adsorption of oxygen in the near-surface region is allowed to occur at both surface and sub-surface sites. The model predicts a variety of possible adsorption characteristics, including the possibility of first order adsorption transitions which involve the formation of a 2-dimensional surface oxide, and different sequences for the occupancy of surface and sub-surface adsorption sites. In particular, by fitting the model to the experimental dependence of Cu surface energy on O-partial pressure, it is possible to conclude that O-adsorption in that case most likely occurs by the occupancy of sub-surface sites.
Keywords :
Equilibrium thermodynamics , surface segregation , Liquid copper-oxygen surfaces , surface energy
Journal title :
Surface Science
Serial Year :
2010
Journal title :
Surface Science
Record number :
1685803
Link To Document :
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