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Free
Surfaces
� Free surfaces have a structure that may differ from the
bulk solid and also a different lattice
spacing. � "Real"
surfaces contain defects such as the ledges, kinks, vacancies and adsorbed
atoms as shown opposite. � Ledges, kinks and surface vacancies
provide locations with stronger bonding than the terraces and are, therefore,
favored sites for atom addition during crystal growth or surface contamination
by non-lattice atoms.
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