New insights into the structure of Pd-Au nanoparticles as revealed by aberration-corrected STEM

► Aberration corrected STEM. ► High resolution spectral and chemical analysis. ► Structure and morphology of complex three-layered Pd-Au-Pd nanoparticles. ► New four-layered nanoparticles. ► Weak-beam dark field (WBDF) and nanobeam diffraction has been used in combination.