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Title: EEL spectroscopic tomography: Towards a new dimension in nanomaterials analysis
Author: Yedra Cardona, Lluís
Eljarrat Ascunce, Alberto
Arenal, Raúl
Pellicer, Eva
Cabo, Moisés
López-Ortega, Alberto
Estrader i Bofarull, Marta
Sort, Jordi
Baró, M. D.
Estradé Albiol, Sònia
Peiró Martínez, Francisca
Keywords: Tomografia
Espectroscòpia de pèrdua d'energia d'electrons
Electron energy loss spectroscopy
Issue Date: 24-Jul-2012
Publisher: Elsevier B.V.
Abstract: Electron tomography is a widely spread technique for recovering the three dimensional (3D) shape of nanostructured materials. Using a spectroscopic signal to achieve a reconstruction adds a fourth chemical dimension to the 3D structure. Up to date, energy filtering of the images in the transmission electron microscope (EFTEM) is the usual spectroscopic method even if most of the information in the spectrum is lost. Unlike EFTEM tomography, the use of electron energy-loss spectroscopy (EELS) spectrum images (SI) for tomographic reconstruction retains all chemical information, and the possibilities of this new approach still remain to be fully exploited. In this article we prove the feasibility of EEL spectroscopic tomography at low voltages (80kV) and short acquisition times from data acquired using an aberration corrected instrument and data treatment by Multivariate Analysis (MVA), applied to FexCo(3-x)O4@Co3O4 mesoporous materials. This approach provides a new scope into materials; the recovery of full EELS signal in 3D.
Note: Versió postprint del document publicat a:
It is part of: Ultramicroscopy, 2012, vol. 122, p. 12-18
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ISSN: 0304-3991
Appears in Collections:Articles publicats en revistes (Enginyeria Electrònica i Biomèdica)
Articles publicats en revistes (Química Inorgànica i Orgànica)

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