By 2d+ Crhea
Transmission electron microscopy (TEM) is an essential technique for understanding the growth mechanisms of materials, enabling their microstructure to be visualized at different scales ranging from micrometers (µm) to the atomic scale. In 2022, the CRHEA, through the ACT-M consortium, acquired a latest-generation transmission electron microscope (TEM) from the ThermoFisher range, a TITAN SPECTRA 200 offering ultimate performance in terms of spatial resolution, 70pm at 200kV, and high energy sensitivity (solid angle: 1.8sr). At CRHEA, the MET has two missions: - A service mission concerning the structural and microstructural characterization of epitaxial materials at CRHEA. This includes conventional measurements for films: - Analysis of structural defects (measurement of their densities, determination of their nature, etc.) - Precise measurement of the thickness, composition, and morphology of heterostructures ranging in size from micrometers to nanometers - Research activity focused on understanding the microstructure of heteroepitaxial thin films as a function of their growth conditions within the framework of various collaborative projects established at the local, national, and international levels
