Empirical two-and three-particle potentials in application to the structure of Ag microclusters on the surface

摘要

Ag microclusters on the surface are considered. Interaction of the atoms in the cluster is modelled by the three-particle potential introduced by J.N.Murrell. Interaction of the atoms in the cluster with the surface is modelled by Lennard-Jones potential. Number of the atoms in the cluster is varying from 4 to 13. It is shown how interaction with the surface changes the structure of the cluster determined without taking this interaction into account. The interaction with the surface affects especially the structure of the clusters with 4, 5 and 6 atoms leading in some cases to the complete change of structure with the tendency for all the atoms to be situated on one plane. This tendency is valid for larger clusters as well, but in this case the onginal structure is more stable and is only partly deformed.