In most technological applications, metals are used either in a finely divided form or in a massive, polycrystalline form. At the microscopic level, most materials, with the notable exception of a few truly amorphous specimens, can be considered as a collection or aggregate of single crystal crystallites. The surface chemistry of the material as a whole is therefore crucially dependent upon the nature and type of surfaces exposed on these crystallites.
Contributors and Attributions
Roger Nix (Queen Mary, University of London)