3D Visualization of the Iron Oxidation State in FeO/Fe3O4 Core-Shell Nanocubes from Electron Energy Loss Tomography
| Autor: | Alberto López-Ortega, Josep Nogués, Zineb Saghi, Raul Arenal, Paul A. Midgley, Lluís Yedra, Francisco de la Peña, German Salazar-Alvarez, Sònia Estradé, Marta Estrader, Caterina Ducati, Francesca Peiró, Lluís López-Conesa, Alberto Eljarrat, Pau Torruella |
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| Přispěvatelé: | Ministerio de Ciencia e Innovación (España), Ministerio de Economía y Competitividad (España), European Commission, European Research Council, Generalitat de Catalunya, Knut and Alice Wallenberg Foundation, Royal Society (UK), Universitat de Barcelona |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
EELS Tomografia Shell (structure) Iron oxide Nanoparticle Bioengineering 02 engineering and technology 010402 general chemistry 01 natural sciences Molecular physics Visualització tridimensional Ion Condensed Matter::Materials Science chemistry.chemical_compound ELNES Oxidation states General Materials Science Spectroscopy Tomography Ferric oxide Mechanical Engineering Resolution (electron density) General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Core (optical fiber) Crystallography Electron tomography chemistry Compressed sensing Òxid de ferro Three-dimensional display systems 0210 nano-technology |
| Zdroj: | Recercat: Dipósit de la Recerca de Catalunya Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) Recercat. Dipósit de la Recerca de Catalunya instname Dipòsit Digital de la UB Universidad de Barcelona Digital.CSIC. Repositorio Institucional del CSIC Dipòsit Digital de Documents de la UAB Universitat Autònoma de Barcelona |
| ISSN: | 2013-4150 |
| Popis: | 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. This work has been carried out in the frame of the Spanish research projects MAT2013-41506, MAT2013-48628-R, FIS2013-46159-C3-3-P, and CSD2009-00013, and Catalan Government support from the SGR2014-672 and 2014-SGR1015 projects is acknowledged. We also acknowledge the support received from the European Union Seventh Framework Program under Grant Agreement 312483 - ESTEEM2 (Integrated Infrastructure Initiative-I3). G.S.A. was partially supported by the Knut and Alice Wallenberg Foundation (Project: 3DEMNATUR). M.E. acknowledges the Spanish Ministry of Science and Innovation through the Juan de la Cierva Program. ICN2 acknowledges support from the Severo Ochoa Program (MINECO, Grant SEV-2013-0295). F.d.l.P. and C.D. acknowledge funding from the ERC under grant no. 259619 PHOTO EM. C.D. acknowledges the Royal Society for funding |
| Databáze: | OpenAIRE |
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