In Situ Study of the Wet Chemical Etching of SiO₂ and Nanoparticle@SiO₂ Core-Shell Nanospheres.

ABSTRACT: The recent development of liquid cell (scanning) transmission electron microscopy (LC-(S)TEM) has opened the unique possibility of studying the chemical behavior of nanomaterials down to the nanoscale in a liquid environment. Here, we show that the chemically induced etching of three different types of silica-based silica nanoparticles can be reliably studied at the single particle level using LC-(S)TEM with a negligible effect of the electron beam, and we demonstrate this method by successfully monitoring the formation of silica-based heterogeneous yolk-shell nanostructures. By scrutinizing the influence of electron beam irradiation, we show that the cumulative electron dose on the imaging area plays a crucial role in the observed damage and needs to be considered during experimental desi

SUBMITTER: Grau-Carbonell A 

PROVIDER: S-EPMC7976607 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature