Probing the local structure of nanoscale actinide oxides: a comparison between PuO₂ and ThO₂ nanoparticles rules out PuO_2+x hypothesis.

ABSTRACT: Actinide research at the nanoscale is gaining fundamental interest due to environmental and industrial issues. The knowledge of the local structure and speciation of actinide nanoparticles, which possibly exhibit specific physico-chemical properties in comparison to bulk materials, would help in a better and reliable description of their behaviour and reactivity. Herein, the synthesis and relevant characterization of PuO₂ and ThO₂ nanoparticles displayed as dispersed colloids, nanopowders, or nanostructured oxide powders allow to establish a clear relationship between the size of the nanocrystals constituting these oxides and their corresponding An(iv) local structure investigated by EXAFS spectroscopy. Particularly, the first oxygen shell of the probed An(iv) evidenc

SUBMITTER: Bonato L 

PROVIDER: S-EPMC9418969 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature