Novel mesoscale defect structure on NiO(100) surfaces by atomic force microscopy

Abstract

Part of the Chemistry CommonsThis Article is brought to you for free and open access by the Published Research -Department of Chemistry at DigitalCommons@University of Nebraska -Lincoln. It has been accepted for inclusion in Marjorie A. Langell Publications by an authorized administrator of DigitalCommons@University of Nebraska -Lincoln.Petitto, S. C.; Berrie, Cindy L.; and Langell, Marjorie , "Novel mesoscale defect structure on NiO(1 0 0) surfaces by atomic force microscopy" (2006). Marjorie A. Langell Publications. 12.

Site Requirements for the Adsorption and Reaction of Oxygenates on Metal Oxide Surfaces

“…Motivated in large part by understanding spin dynamics in antiferromagnetic materials, several AFM studies of NiO(100) surfaces in which atomic resolution has been obtained have been reported in the literature in recent years. − The AFM images obtained in these studies provide a picture of the NiO(100) surface that is similar to that described above for MgO(100). The NiO(100) surface is found to not reconstruct and has a periodicity consistent with ideal termination of the bulk .…”

“…The NiO(100) surface is found to not reconstruct and has a periodicity consistent with ideal termination of the bulk . Wide scan images of cleaved NiO(100) surfaces show that the dominant defect structures are step edges aligned along the ⟨001⟩ and ⟨010⟩ crystallographic directions. , …”

“…98 Wide scan images of cleaved NiO(100) surfaces show that the dominant defect structures are step edges aligned along the ⟨001⟩ and ⟨010⟩ crystallographic directions. 94,97 The studies of the adsorption and reaction of alcohols and carboxylic acids on well-defined NiO single-crystal surfaces are much less extensive than those for MgO. This makes it more difficult to propose specific adsorption sites for these molecules on NiO.…”

Controllable Manipulation of the Surface Superstructures and Stoichiometry of Single-Crystal CoO(001)

“…The surface properties of transition-metal oxides have been widely studied due to their application in the fields of solid-state electronic devices, storage media, and catalysts. − It is well-known that the surface properties of transition-metal oxides are strongly correlated with both the surface stoichiometry − (instantiated by the oxygen or cation vacancies, − adatoms − ) and the mesoscopic scale defects (such as the step-defects , and pits , ). The modulation of surface stoichiometry and the incorporation of defects are generally realized by the chemical corrosions, , high-temperature annealing, , ion sputtering, , and the lattice mismatch .…”

“…The surface properties of transition-metal oxides have been widely studied due to their application in the fields of solid-state electronic devices, storage media, and catalysts. − It is well-known that the surface properties of transition-metal oxides are strongly correlated with both the surface stoichiometry − (instantiated by the oxygen or cation vacancies, − adatoms − ) and the mesoscopic scale defects (such as the step-defects , and pits , ). The modulation of surface stoichiometry and the incorporation of defects are generally realized by the chemical corrosions, , high-temperature annealing, , ion sputtering, , and the lattice mismatch . Although these technical means can easily alter the surface stoichiometry, the distribution of the defects is often arbitrary, constantly resulting in the ungovernable properties of the surface.…”