Size-Controlled High-Temperature Synthesis of Crystalline Niobium and Tantalum Oxide Nanoparticles: Exploring Structural Variations at Nanoscale.

ABSTRACT: Niobium and tantalum oxides are highly stable materials under harsh oxidizing conditions with diverse applications in catalysis, energy storage, and optoelectronics. Niobium oxides exhibit a rich variety of polymorphs and crystal structures (e.g., T-, M-, H-Nb₂O₅, NbO₂, and NbO), whose electronic properties depend strongly on their crystalline structure. Realizing these crystal structures typically requires thermal syntheses at high temperatures and different gas atmospheres, which causes particle sintering and growth, compromising nanoscale features and limiting functionality. Here, we present a synthesis route for niobium and tantalum oxide nanoparticles below 10 nm, showing unprecedented control over size and stoichiometry at temperatures up to 1100 °C.

SUBMITTER: Pfeifer P 

PROVIDER: S-EPMC12673515 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature