3D Visualization of the Iron Oxidation State in FeO/Fe3O4 Core-Shell Nanocubes from Electron Energy Loss Tomography

The physicochemical properties used in numerous advanced nanostructured devices are directly controlled by the oxidation states of their constituents. In this work we combine electron energy-loss spectroscopy, blind source separation, and computed tomography to reconstruct in three dimensions the di...

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Detalles Bibliográficos
Autores: Torruella, Pau, Arenal, Raúl|||0000-0002-2071-9093, Peña, Francisco de la, Saghi, Zineb|||0000-0002-8895-8410, Yedra Cardona, Lluís|||0000-0003-1818-9836, Eljarrat Ascunce, Alberto, López Conesa, Lluís|||0000-0003-1456-079X, Estrader i Bofarull, Marta|||0000-0003-3379-8234, López-Ortega, Alberto|||0000-0003-3440-4444, Salazar Álvarez, Germán|||0000-0002-0671-435X, Nogués, Josep|||0000-0003-4616-1371, Ducati, Caterina, Midgley, Paul A., Peiro, Francesca|||0000-0002-5697-0554, Estrade, Sonia|||0000-0002-3340-877X
Tipo de recurso: artículo
Fecha de publicación:2016
País:España
Institución:Universitat Autònoma de Barcelona
Repositorio:Dipòsit Digital de Documents de la UAB
Idioma:inglés
OAI Identifier:oai:ddd.uab.cat:206946
Acceso en línea:https://ddd.uab.cat/record/206946
https://dx.doi.org/urn:doi:10.1021/acs.nanolett.6b01922
Access Level:acceso abierto
Palabra clave:Compressed sensing
EELS
Electron tomography
ELNES
Iron oxide
Oxidation states
Descripción
Sumario:The physicochemical properties used in numerous advanced nanostructured devices are directly controlled by the oxidation states of their constituents. In this work we combine electron energy-loss spectroscopy, blind source separation, and computed tomography to reconstruct in three dimensions the distribution of Fe and Fe ions in a FeO/FeO core/shell cube-shaped nanoparticle with nanometric resolution. The results highlight the sharpness of the interface between both oxides and provide an average shell thickness, core volume, and average cube edge length measurements in agreement with the magnetic characterization of the sample.

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