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3D Visualization of the Iron Oxidation State in FeO/Fe3O4 Core-Shell Nanocubes from Electron Energy Loss Tomography
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Number of Authors: 15
2016 (English)In: Nano letters (Print), ISSN 1530-6984, E-ISSN 1530-6992, Vol. 16, no 8, 5068-5073 p.Article in journal (Refereed) Published
Abstract [en]

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 Fe2+ and Fe3+ ions in a FeO/Fe3O4 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.

Place, publisher, year, edition, pages
2016. Vol. 16, no 8, 5068-5073 p.
Keyword [en]
Electron tomography, EELS, ELNES, oxidation states, compressed sensing, iron oxide
National Category
Chemical Sciences Nano Technology Materials Engineering Physical Sciences
URN: urn:nbn:se:su:diva-134273DOI: 10.1021/acs.nanolett.6b01922ISI: 000381331900047PubMedID: 27383904OAI: diva2:1033447
Available from: 2016-10-06 Created: 2016-10-03 Last updated: 2016-10-06Bibliographically approved

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Salazar-Alvarez, Germán
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Department of Materials and Environmental Chemistry (MMK)
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