Electron energy-loss spectroscopic tomography of FeCoO impregnated CoO mesoporous particles: unraveling the chemical information in three dimensions

Electron energy-loss spectroscopy-spectrum image (EELS-SI) tomography is a powerful tool to investigate the three dimensional chemical configuration in nanostructures. Here, we demonstrate, for the first time, the possibility to characterize the spatial distribution of Fe and Co cations in a complex...

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Published in:Analyst (London) 2016-08, Vol.141 (16), p.4968-4972
Main Authors: Yedra, L, Eljarrat, A, Arenal, R, López-Conesa, L, Pellicer, E, López-Ortega, A, Estrader, M, Sort, J, Baró, M. D, Estradé, S, Peiró, F
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Summary:Electron energy-loss spectroscopy-spectrum image (EELS-SI) tomography is a powerful tool to investigate the three dimensional chemical configuration in nanostructures. Here, we demonstrate, for the first time, the possibility to characterize the spatial distribution of Fe and Co cations in a complex Fe x Co (3− x ) O 4 /Co 3 O 4 ordered mesoporous system. This hybrid material is relevant because of the ferrimagnetic/antiferromagnetic coupling and high surface area. We unambiguously prove that the EELS-SI tomography shows a sufficiently high resolution to simultaneously unravel the pore structure and the chemical signal. Electron energy-loss spectroscopy-spectrum image (EELS-SI) tomography is a powerful tool to investigate the three dimensional chemical configuration in nanostructures.
ISSN:0003-2654
1364-5528
DOI:10.1039/c6an00562d