In-situ TEM technique and Its Structural Manipulation in Metal Oxides

The In-situ transmission electron microscopy (TEM) method is powerful in a way that it can directly correlate the atomic-scale structure with physical and chemical properties. In this presentation, we will report on the construction and applications of the in-situ TEM setup including mechanical, electrical and optical holders, which were built by scanning probe microscopy technique. So the manipulation and physical measurement have been realized inside TEM, where the atomic-scale imaging of electrically and/or mechanically driven structural evolution at atomic scale has been carried out by homemade in-situ TEM setup.
Exploring the lattice degree of freedom of metal oxides in transition between different structural phases may provide a route to enable new functionality in oxide materials with potential applications. Here we report on the oxygen diffusion in CeO₂, and the experimental finding of strain-inhibited structural transition from perovskite to brownmillerite during the oxygen vacancy electromigration in epitaxial LaCoO₃ thin films, as well as the electrical and mechanical manipulation of topological polar configurations in PbTiO₃/SrTiO₃ superlattice will be included.