Extreme structural stability of Ti<sub>0.5</sub>Sn<sub>0.5</sub>O<sub>2</sub> nanoparticles: synergistic effect in the cationic sublattice - Archive ouverte HAL Access content directly
Journal Articles Nanoscale Year : 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.
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hal-03853534 , version 1 (22-02-2023)

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Denis Machon, Sylvie Le Floch, Shashank Mishra, Stéphane Daniele, Karine Masenelli-Varlot, et al.. Extreme structural stability of Ti0.5Sn0.5O2 nanoparticles: synergistic effect in the cationic sublattice. Nanoscale, 2022, 14 (38), pp.14286-14296. ⟨10.1039/D2NR03441G⟩. ⟨hal-03853534⟩
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