title: Oxide Wizard: an EELS application to characterize the white lines of transition metal edges.
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.
authors.affiliation: 1Laboratory of Electron Nanoscopies (LENS)-MIND/IN2UB,Dept. d'Electrònica,Universitat de Barcelona,C/Martí i Franquès 1,E-08028 Barcelona,Spain.
authors.forename: Lluís
authors.initials: L
authors.lastname: Yedra
authors.affiliation: 3Ciència de Materials i Enginyeria Metal·lúrgica,Dept. d'Enginyeria Química,Universitat de Barcelona,E-08028 Barcelona,Spain.
authors.forename: Elena
authors.initials: E
authors.lastname: Xuriguera
authors.affiliation: 4Departament de Química Inorgànica,Universitat de Barcelona,Diagonal 645,E-08028,Barcelona,Spain.
authors.forename: Marta
authors.initials: M
authors.lastname: Estrader
authors.affiliation: 5INSTM and Dipartimento di Chimica "U. Schiﬀ",Università degli Studi di Firenze,Via della Lastruccia 3,Sesto Fiorentino,I-50019 Firenze,Italy.
authors.forename: Alberto
authors.initials: A
authors.lastname: López-Ortega
authors.affiliation: 6Departament de Física,Universitat Autònoma de Barcelona,E-08193 Bellaterra (Barcelona),Spain.
authors.forename: Maria D
authors.initials: MD
authors.lastname: Baró
authors.affiliation: 7ICN2-Institut Catala de Nanociencia i Nanotecnologia,Campus UAB,E-08193 Bellaterra (Barcelona),Spain.
authors.forename: Josep
authors.initials: J
authors.lastname: Nogués
authors.affiliation: 9Oak Ridge National Laboratory,Materials Science & Technology Division,Oak Ridge,TN 37831,USA.
authors.forename: Manuel
authors.initials: M
authors.lastname: Roldan
authors.affiliation: 9Oak Ridge National Laboratory,Materials Science & Technology Division,Oak Ridge,TN 37831,USA.
authors.forename: Maria
authors.initials: M
authors.lastname: Varela
authors.affiliation: 1Laboratory of Electron Nanoscopies (LENS)-MIND/IN2UB,Dept. d'Electrònica,Universitat de Barcelona,C/Martí i Franquès 1,E-08028 Barcelona,Spain.
authors.forename: Sònia
authors.initials: S
authors.lastname: Estradé
authors.affiliation: 1Laboratory of Electron Nanoscopies (LENS)-MIND/IN2UB,Dept. d'Electrònica,Universitat de Barcelona,C/Martí i Franquès 1,E-08028 Barcelona,Spain.
authors.forename: Francesca
authors.initials: F
authors.lastname: Peiró