In Situ Atomic-Scale Observation of Kinetic Pathways of Sublimation in Silver Nanoparticles.

ABSTRACT: Uncovering kinetics of sublimation atomically is critical to understanding both natural phenomena and advanced manufacturing technologies. Here, direct in situ atomic-scale observations to understand the effects of size, surface, and defects in the sublimation process of supported silver nanoparticles upon heating within an aberration-corrected transmission electron microscopy are conducted. Atomic-scale evidence to sublimation and atomic rearrangement in small Ag nanoparticles during heating is provided, and it is demonstrated that the sublimation-induced stable surfaces in the particles with a size smaller than ≈30 nm are {111} and {100} planes. The role of surface energy and defects in the uniform and nonuniform sublimation pathways at the atomic scale is also revealed, and it is found

SUBMITTER: Li J 

PROVIDER: S-EPMC6468973 | biostudies-literature | 2019 Apr

REPOSITORIES: biostudies-literature