Oxide Wizard: An EELS Application to Characterize the White Lines of Transition Metal Edges

Physicochemical properties of transition metal oxides are directly determined by the oxidation state of the metallic cations. To address the increasing need to accurately evaluate the oxidation states of transition metal oxide systems at the nanoscale, here we present “Oxide Wizard.” This script for...

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Bibliographic Details
Published in:Microscopy and microanalysis 2014-06, Vol.20 (3), p.698-705
Main Authors: Yedra, Lluís, Xuriguera, Elena, Estrader, Marta, López-Ortega, Alberto, Baró, Maria D., Nogués, Josep, Roldan, Manuel, Varela, Maria, Estradé, Sònia, Peiró, Francesca
Format: Article
Language:English
Subjects:
Cations
EDGE Special Issue
Electrons
Energy
Iron oxides
Manganese
Metals
Oxidation
Physicochemical properties
Spectrum analysis
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Summary:Physicochemical properties of transition metal oxides are directly determined by the oxidation state of the metallic cations. To address the increasing need to accurately evaluate the oxidation states of transition metal oxide systems at the nanoscale, here we present “Oxide Wizard.” This script for Digital Micrograph characterizes the energy-loss near-edge structure and the position of the transition metal edges in the electron energy-loss spectrum. These characteristics of the edges can be linked to the oxidation states of transition metals with high spatial resolution. The power of the script is demonstrated by mapping manganese oxidation states in Fe3O4/Mn3O4 core/shell nanoparticles with sub-nanometer resolution in real space.
ISSN:1431-9276
1435-8115
DOI:10.1017/S1431927614000440