Issue 38, 2022

Extreme structural stability of Ti0.5Sn0.5O2 nanoparticles: synergistic effect in the cationic sublattice

Abstract

Ti0.5Sn0.5O2 nanoparticles (∼5 nm and ∼10 nm) have been studied under high pressure by Raman spectroscopy. For particles with diameter ∼10 nm, a transformation has been observed at 20–25 GPa while for particles with ∼5 nm diameter no phase transition has been observed up to ∼30 GPa. The Ti0.5Sn0.5O2 solid solution shows an extended stability at the nanoscale, both of its cationic and anionic sublattices. This ultrastability originates from the contribution of Ti and Sn mixing: Sn stabilizes the cationic network at high pressure and Ti ensures a coupling between the cationic and anionic sublattices. This result questions a “traditional” crystallographic description based on polyhedra packing and this synergistic effect reported in this work is similar to the case of metamaterials but at the nanoscale.

Graphical abstract: Extreme structural stability of Ti0.5Sn0.5O2 nanoparticles: synergistic effect in the cationic sublattice

Supplementary files

Article information

Article type
Paper
Submitted
22 Jun 2022
Accepted
13 Sep 2022
First published
14 Sep 2022

Nanoscale, 2022,14, 14286-14296

Extreme structural stability of Ti0.5Sn0.5O2 nanoparticles: synergistic effect in the cationic sublattice

D. Machon, S. Le Floch, S. Mishra, S. Daniele, K. Masenelli-Varlot, P. Hermet and P. Mélinon, Nanoscale, 2022, 14, 14286 DOI: 10.1039/D2NR03441G

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