3D Visualization of the Iron Oxidation State in FeO/Fe3O4 Core-Shell Nanocubes from Electron Energy Loss Tomography
Torruella, Pau (Universitat de Barcelona. Departament d'Electrònica)
Arenal, Raúl (Fundación ARAID)
Peña, Francisco de la (University of Cambridge. Department of Materials Science and Metallurgy)
Saghi, Zineb (Commissariat à l'Énergie Atomique et aux Énergies Alternatives (França))
Yedra Cardona, Lluís (Universitat de Barcelona. Departament d'Electrònica)
Eljarrat Ascunce, Alberto (Universitat de Barcelona. Departament d'Electrònica)
López Conesa, Lluís (Universitat de Barcelona. Departament d'Electrònica)
Estrader, Marta (Laboratoire de Physique et Chimie des Nano-objects)
López-Ortega, Alberto (Università degli Studi di Firenze)
Salazar Álvarez, Germán (Stockholm University)
Nogués, Josep (Institut Català de Nanociència i Nanotecnologia)
Ducati, Caterina (University of Cambridge. Department of Materials Science and Metallurgy)
Midgley, Paul A. (University of Cambridge. Department of Materials Science and Metallurgy)
Peiro, Francesca (Universitat de Barcelona. Departament d'Electrònica)
Estrade, Sonia (Universitat de Barcelona. Departament d'Electrònica)

Date:	2016
Abstract:	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.
Grants:	Ministerio de Economía y Competitividad MAT2013-41506 Ministerio de Economía y Competitividad MAT2013-48628-R Ministerio de Economía y Competitividad FIS2013-46159-C3-3-P Ministerio de Economía y Competitividad CSD2009-00013 Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-672 Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-1015 European Commission 312483 Ministerio de Economía y Competitividad SEV-2013-0295 European Commission 259619
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Subject:	Compressed sensing ; EELS ; Electron tomography ; ELNES ; Iron oxide ; Oxidation states
Published in:	Nano letters, Vol. 16, Issue 8 (August 2016) , p. 5068-5073, ISSN 1530-6992

DOI: 10.1021/acs.nanolett.6b01922

Postprint 9 p, 605.3 KB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles