Related Experiment Video
Updated: Mar 18, 2026

Energy Dispersive X-ray Tomography for 3D Elemental Mapping of Individual Nanoparticles
Published on: July 5, 2016
3D Visualization of the Iron Oxidation State in FeO/Fe3O4 Core-Shell Nanocubes from Electron Energy Loss Tomography
Pau Torruella1, Raúl Arenal2,3, Francisco de la Peña4
1LENS-MIND-IN2UB, Departament d'Electrònica, Institut de Nanociència i Nanotecnologia, Universitat de Barcelona , Martí i Franquès 1, E-08028 Barcelona, Spain.
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.
More Related Videos
Related Concept Videos
Electron Microscope Tomography and Single-particle Reconstruction
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...
Scanning Electron Microscopy
Fundamental Principles
Accelerated...
Ferromagnetism
Transmission Electron Microscopy
Overview of Electron Microscopy
Electron Orbital Model
The first shell is closest to the nucleus, and it has only one subshell with a single spherical orbital called the...

