Polar surface structure of oxide nanocrystals revealed with solid-state NMR spectroscopy.

ABSTRACT: Compared to nanomaterials exposing nonpolar facets, polar-faceted nanocrystals often exhibit unexpected and interesting properties. The electrostatic instability arising from the intrinsic dipole moments of polar facets, however, leads to different surface configurations in many cases, making it challenging to extract detailed structural information and develop structure-property relations. The widely used electron microscopy techniques are limited because the volumes sampled may not be representative, and they provide little chemical bonding information with low contrast of light elements. With ceria nanocubes exposing (100) facets as an example, here we show that the polar surface structure of oxide nanocrystals can be investigated by applying ¹⁷O and ¹H solid-state

SUBMITTER: Chen J 

PROVIDER: S-EPMC6882792 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature