Atomic Structure Analysis of A ZnO/Pd Interface by Atomic Resolution HVTEM

Abstract

Interfacial atomic structure (chemical structure) of a Pd/ZnO hetero junction was investigated by atomicresolution high voltage transmission electron microscopy(ARHVTEM). A misfit dislocation did not work as astress accommodation mechanism in the ZnO (0001)/Pd (111) interface. But the periodic stress localizationoccurred in the ZnO (10m10)/(200) interface. The periodicity of the local strain coincided with that of misfitdislocation. Atomic structure image of the ARHVTEM showed that an atomic arrangement across the interfacewas in the order of O-Zn-Pd. It was shown that mechanical weakness of the ZnO (0001)/Pd (111) interfaceagainst cyclic heating is attributable to the absence of the periodic stress localization of the misfit dislocation.