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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Detalhes 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 documento: artigo
Data de publicação:2016
País:España
Recursos:Universitat Autònoma de Barcelona
Repositório:Dipòsit Digital de Documents de la UAB
Idioma:inglês
OAI Identifier:oai:ddd.uab.cat:206946
Acesso em linha:https://ddd.uab.cat/record/206946
https://dx.doi.org/urn:doi:10.1021/acs.nanolett.6b01922
Access Level:Acceso aberto
Palavra-chave:Compressed sensing
EELS
Electron tomography
ELNES
Iron oxide
Oxidation states
Descrição
Resumo: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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