High-resolution electron microscopy of Cu/MgO and Pd/MgO interfaces

F. R. Chen*, S. K. Chiou, Li Chang, C. S. Hong

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

53 Scopus citations

Abstract

Cu/(111)MgO and Pd/(111)MgO interfaces with a cube-on-cube relation are produced by the internal oxidation technique. High-resolution transmission electron microscopy has been applied to study the interface structures of Cu/(111)MgO and Pd/(111)MgO. In contrast to a previous work in which cases the core structures of interfacial dislocations in Cu/(111)MgO and Pd/(111)MgO interfaces could not be directly observed from the high-resolution images, we have observed localized interfacial dislocations in both Cu/(111)MgO and Pd/(111)MgO interfaces from high-resolution images. Each interfacial dislocation in the Cu/(111)MgO and Pd/(111)MgO interfaces actually contributes to sets of zig-zag dislocations in a hexagonal network. Viewing along [110], the overlapped distances of the zig-zag interfacial dislocations in the network are {most positive}0.5 and 1 nm for the Cu/MgO and Pd/MgO interfaces, respectively, which is comparable with the observed 'localized width' of interfacial dislocations from high-resolution images. The atomic structures of these two metal/oxide interfaces are determined from through-focal series of high-resolution images. The terminating lattice plane in the interface is the oxygen lattice plane for both Cu/(111)MgO and Pd/(111)MgO interfaces which are composed of distorted structural units of Cu2O and PdO, respectively. Junction dislocations resembling those in grain boundary facets, related to the difference of the rigid body translations, are observed between two energetically equivalent {111} facets in the Cu/MgO and Pd/MgO interfaces. The Burgers vector of the junction dislocation is 1 6〈112〉 and a stacking fault in the soft metal matrix is found accompanying this junction dislocation.

Original languageEnglish
Pages (from-to)179-191
Number of pages13
JournalUltramicroscopy
Volume54
Issue number2-4
DOIs
StatePublished - Jun 1994

Fingerprint Dive into the research topics of 'High-resolution electron microscopy of Cu/MgO and Pd/MgO interfaces'. Together they form a unique fingerprint.

Cite this