A new method was proposed for the determination of the activation energies for surface diffusion on large monocrystals. The activation energy for the surface diffusion of 1-dimensional or 2-dimensional islands, and the energy which was required in order to remove an adatom from an adsorbate island, were determined. In the case of Rh, the latter energy was between 0.67 and 1eV. In the case of Pt, this energy was equal to 1.1eV while, for Ir, it was equal to 1.3eV. It was found that the results (table 173) were in good agreement with published data which had been obtained by means of field-ion microscopy.

J.Kolaczkiewicz, E.Bauer: Surface Science, 1991, 256[1-2], 87-93

Table 173

Activation Energies for the Surface Diffusion of Pt-Group Metals on (110)W