Substrate-Mediated Evaporation and Stochastic Evolution of Supported Au Nanoparticles
This study combines in situ transmission electron microscopy with a self-consistent theoretical framework to demonstrate that the evolution of supported gold nanoparticles during high-temperature vacuum annealing is governed by a unified mechanism where substrate-mediated evaporation drives a size-independent mean shrinkage, while collective mass exchange and stochastic adatom fluctuations dictate individual particle variability and lateral diffusion.