Surface Diffusion and Surface Structure
Surface Diffusion and Surface Structure - Ten Years of Research The topic of surface diffusion continues to increase in importance, not only because of its practical importance in fields as diverse as catalysis and crystal growth/solidification, but also because this is a case in which fundamental diffusion processes can be monitored in extreme detail; even to the point of following a single migrating atom.
Indeed, the movement of such an atom is so accessible that the effects of bulk defects (dislocations, stacking faults, twins, etc.) which intersect and distort the surface, and lead to various detours in its route, become strikingly evident. This also applies to the structure of the surface. Various common features, which cannot properly be termed defects, also affect surface migration. Close observation reveals that atoms really do 'skip' more easily down surface steps, than up them, thus often leading to an inherent diffusional asymmetry. In addition to the existence of steps, whose presence was predicted on theoretical grounds long before their experimental observation, came the belated understanding that the surface structure need not reflect the bulk structure; thus making the phenomenon of surface reconstruction a further essential consideration.
The present volume summarises, via abstracts and data compilations, the experimental research effort expended on these topics during the past decade. It will be of especial interest to those working in the fields of surface-treatment, epitaxy, crystal growth, catalysis, sensor design, or pure diffusion research.