Interface-mediated Kirkendall effect and nanoscale void migration in bimetallic nanoparticles during interdiffusion

Abstract

At elevated temperatures, bimetallic nanomaterials often change their composition and morphology due to the interdiffusion of atomic species, which can affect their properties. Here, the authors use in situ transmission electron microscopy to provide new insights into the Kirkendall effect and void motion in core-shell nanoparticles of Au and Pd.