STEM HAADF electron tomography of palladium nanoparticles with complex shapes

Palladium nanoparticles, with potential interest for various applications in catalysis, have been studied by Transmission Electron Microscopy (TEM). In order to ascertain the exact morphology of these particles, electron tomography was perfomed in the Scanning TEM, High Angle Annular Dark Field (STEM–HAADF) imaging mode. Several geometrical forms have thus been characterized three-dimensionally at the nanometre scale, among them pentagonal rods and more complex bipyramidal nanocrystals.