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Title

3D visualization of the iron oxidation state in FeO/Fe3O4 core-shell nanocubes from electron energy loss tomography

AuthorsTorruella, Pau; Arenal, Raúl; Peña, Francisco de la; Saghi, Zineb; Yedra, Lluís; Eljarrat, Alberto; López-Conesa, Lluís; Estrader, Marta ; López-Ortega, Alberto; Salazar-Álvarez, G.; Nogués, Josep ; Ducati, Caterina; Midgley, Paul A.; Peiró, F.; Estradé, S.
KeywordsElectron tomography
Compressed sensing
Oxidation states
ELNES
EELS
Iron oxide
Issue Date2016
PublisherAmerican Chemical Society
CitationNano Letters 16(8): 5068-5073 (2016)
AbstractThe 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.
URIhttp://hdl.handle.net/10261/159283
Identifiersdoi: 10.1021/acs.nanolett.6b01922
e-issn: 1530-6992
issn: 1530-6984
Appears in Collections:(CIN2) Artículos
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