Polycrystalline Wustite Surface Observed By Stm And Leed

摘要

After annealing at 1 273 K in UHV chamber to remove adsorbed molecule, the surface crystal structure and the composition of polycrystalline Fe_(1-x)O were analyzed at room temperature using STM, LEED and AES. The Fe_(1-x)O sample was prepared by oxidizing an polycrystalline electrolytic iron strip. The Fe_(1-x)O surface consists of facets, where many steps like zig-zag shape are arranged. The mesh-like structure, of which periodicity is about 0.8-1.3 nm, was observed on the terrace. The facets are (001) planes of Fe_(1-x)O, and the step direction is <110> by LEED measurement. The mesh-like structure is considered as the defect clusters derived from nonstoichiometry.