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

Published online by Cambridge University Press:  22 April 2014

Lluís Yedra ,
Elena Xuriguera ,
Marta Estrader ,
Alberto López-Ortega ,
Maria D. Baró ,
Josep Nogués ,
Manuel Roldan ,
Maria Varela ,
Sònia Estradé Open the ORCID record for Sònia Estradé [Opens in a new window]  and
Francesca Peiró
Lluís Yedra*
Affiliation:
Laboratory of Electron Nanoscopies (LENS)-MIND/IN2UB, Dept. d’Electrònica, Universitat de Barcelona, C/Martí i Franquès 1, E-08028 Barcelona, Spain CCiT, Scientific and Technical Centers, Universitat de Barcelona, C/Lluís Solé i Sabaris 1, E-08028 Barcelona, Spain
Elena Xuriguera
Affiliation:
Ciència de Materials i Enginyeria Metal·lúrgica, Dept. d’Enginyeria Química, Universitat de Barcelona, E-08028 Barcelona, Spain
Marta Estrader
Affiliation:
Departament de Química Inorgànica, Universitat de Barcelona, Diagonal 645, E-08028, Barcelona, Spain
Alberto López-Ortega
Affiliation:
INSTM and Dipartimento di Chimica “U. Schiff”, Università degli Studi di Firenze, Via della Lastruccia 3, Sesto Fiorentino, I-50019 Firenze, Italy
Maria D. Baró
Affiliation:
Departament de Física, Universitat Autònoma de Barcelona, E-08193 Bellaterra (Barcelona), Spain
Josep Nogués
Affiliation:
ICN2-Institut Catala de Nanociencia i Nanotecnologia, Campus UAB, E-08193 Bellaterra (Barcelona), Spain Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain
Manuel Roldan
Affiliation:
Oak Ridge National Laboratory, Materials Science & Technology Division, Oak Ridge, TN 37831, USA Departamento de Física Aplicada III & Instituto Pluridisciplinar, Universidad Complutense de Madrid, E-28040 Madrid, Spain
Maria Varela
Affiliation:
Oak Ridge National Laboratory, Materials Science & Technology Division, Oak Ridge, TN 37831, USA Departamento de Física Aplicada III & Instituto Pluridisciplinar, Universidad Complutense de Madrid, E-28040 Madrid, Spain
Sònia Estradé
Affiliation:
Laboratory of Electron Nanoscopies (LENS)-MIND/IN2UB, Dept. d’Electrònica, Universitat de Barcelona, C/Martí i Franquès 1, E-08028 Barcelona, Spain CCiT, Scientific and Technical Centers, Universitat de Barcelona, C/Lluís Solé i Sabaris 1, E-08028 Barcelona, Spain
Francesca Peiró
Affiliation:
Laboratory of Electron Nanoscopies (LENS)-MIND/IN2UB, Dept. d’Electrònica, Universitat de Barcelona, C/Martí i Franquès 1, E-08028 Barcelona, Spain
*
*Corresponding author.[email protected]
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Abstract

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.

Keywords

EELSspectrum imagetransition metal oxidesoxidation stateDigital Micrograph scriptmanganese oxide
Type
EDGE Special Issue
Information
Microscopy and Microanalysis , Volume 20 , Issue 3 , June 2014 , pp. 698 - 705
Copyright
© Microscopy Society of America 2014 

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