75. Partial FeO-Fe3O4 Phase Transition along the <111> Direction of the Cubic Crystalline Structure in Iron Oxide Nanocrystals
Martín Testa-Anta, Benito Rodríguez-González and Verónica Salgueiriño
Particle & Particle Systems Characterization (2019), 36, 1900283 (DOI: 10.1002/ppsc.201900283).
The iron oxide nanocrystals described herein stem from a ketonic decarboxylation reaction which fosters the delivery of -FeO- as an intermedium product. This intermedium product working as a monomer nucleates into FeO seeds which grow to attain a cubic shape with tips. This kinetically-controlled second stage of growth favors the deposition of -FeO- at the apexes and promotes a partial topochemical FeO to Fe3O4 phase transition mainly along the elongated <111> direction of the cubic crystalline structures.