Ceria: Diffusion of Cation Impurities through Ceria Grain Boundaries (Adv. Mater. Interfaces 20/2020)

In article number 2000688, WooChul Jung and co-workers demonstrate dense polycrystalline thin films of ceria with a very high grain boundary density by pulsed laser deposition (PLD) and assessed the amount of diffused metal along the columnar grain boundaries normal to the surface by time-of-flight secondary ion mass spectrometry (ToF-SIMS). The observed dynamic behaviors of transition metals present a new perspective on the performance and durability of ceria-containing applications.