Tailoring atomic diffusion for in situ fabrication of different heterostructures.

ABSTRACT: Atomic diffusion has been recognized as a particularly powerful tool in the synthesis of heterostructures. However, controlled atomic diffusion is very difficult to achieve in the fabrication of individual nanostructures. Here, an electrically driven in situ solid-solid diffusion reaction inside a TEM is reported for the controlled fabrication of two different hetero-nanostructures in the Ag-Te system. Remarkably, the morphology and structure of the as-formed heterostructures are strongly dependent on the path of atomic diffusion. Our experiments revealed that the surface diffusion of Te atoms to Ag nanowires leads to a core-shell structure, while the bulk diffusion of Ag atoms give rise to a Ag₂Te-Te segmented heterostructure. Heat released by Joule heating caused the surface d

SUBMITTER: Zhang H 

PROVIDER: S-EPMC8355324 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature