Revealing a masked Verwey transition in nanoparticles of coexisting Fe-oxide phases

The attractive electronic and magnetic properties together with their biocompatibility make iron-oxide nanoparticles appear as functional materials. In Fe-oxide nanoparticle (IONP) ensembles, it is crucial to enhance their performance thanks to controlled size, shape, and stoichiometry ensembles. In...

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Detalles Bibliográficos
Autores principales: González-Alonso, David, González, Jesús, Gavilán, Helena, Fock, Jeppe, Zeng, Lunjie, Witte, Kerstin, Bender, Philipp, Barquín, Luis Fernández, Johansson, Christer
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2020
Materias:
Chemistry
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8690849/
https://www.ncbi.nlm.nih.gov/pubmed/35423016
http://dx.doi.org/10.1039/d0ra09226f
Descripción
Sumario:The attractive electronic and magnetic properties together with their biocompatibility make iron-oxide nanoparticles appear as functional materials. In Fe-oxide nanoparticle (IONP) ensembles, it is crucial to enhance their performance thanks to controlled size, shape, and stoichiometry ensembles. In light of this, we conduct a comprehensive investigation in an ensemble of ca. 28 nm cuboid-shaped IONPs in which all the analyses concur with the coexistence of magnetite/maghemite phases in their cores. Here, we are disclosing the Verwey transition by temperature dependent (4–210 K) Raman spectroscopy.

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