| Literature DB >> 27383904 |
Pau Torruella1, Raúl Arenal2,3, Francisco de la Peña4, Zineb Saghi5, Lluís Yedra1, Alberto Eljarrat1, Lluís López-Conesa1, Marta Estrader6, Alberto López-Ortega7, Germán Salazar-Alvarez8, Josep Nogués9,10, Caterina Ducati4, Paul A Midgley4, Francesca Peiró1, Sonia Estradé1.
Abstract
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(2+) and Fe(3+) 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.Entities:
Keywords: EELS; ELNES; Electron tomography; compressed sensing; iron oxide; oxidation states
Year: 2016 PMID： 27383904 DOI： 10.1021/acs.nanolett.6b01922
Source DB: PubMed Journal: Nano Lett ISSN： 1530-6984 Impact factor: 11.189