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Inside back cover

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Nanoscale Vol - 7 Issue - 8

Nanoscale Vol - 7 Issue - 7

Nanoscale Vol - 7 Issue - 6

Nanoscale Vol - 7 Issue - 5

Growth and composition of nanostructured and nanoporous cerium oxide thin films on a graphite foil

Content Provider	Royal Society of Chemistry (RSC)
Author	Lavkova, Jaroslava Vorokhta, Mykhailo Khalakhan, Ivan Matolin, Vladimir Matolinova, Iva Potin, Valerie Chundak, Mykhailo
Copyright Year	2015
Abstract	The morphology and composition of CeOx films prepared by r.f. magnetron sputtering on a graphite foil have been investigated mainly by using microscopy methods. This study presents the formation of nanocrystalline layers with porous structure due to the modification of a carbon support and the formation of cerium carbide crystallites as a result of the deposition process. Chemical analyses of the layers with different thicknesses performed by energy dispersive X-ray spectroscopy, electron energy loss spectroscopy and X-ray photoelectron spectroscopy have pointed to the reduction of the cerium oxide layers. In the deposited layers, cerium was present in mixed Ce3+ and Ce4+ valence. Ce3+ species were located mainly at the graphite foil–CeOx interface and the chemical state of cerium was gradually changing to Ce4+ going to the layer surface. It became more stoichiometric in the case of thicker layers except for the surface region, where the presence of Ce3+ was associated with oxygen vacancies on the surface of cerium oxide grains. The degree of cerium oxide reduction is discussed in the context of particle size.
Starting Page	4038
Ending Page	4047
Page Count	10
File Format	HTM / HTML PDF
ISSN	20403364
Volume Number	7
Issue Number	9
Journal	Nanoscale
DOI	10.1039/c4nr06550f
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Stoichiometry Oxygen Microscopy Energy-dispersive X-ray spectroscopy Graphite Cerium Photoemission spectroscopy Cavity magnetron Carbon Sputtering Electron energy loss spectroscopy X-ray photoelectron spectroscopy
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology

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Growth and composition of nanostructured and nanoporous cerium oxide thin films on a graphite foil

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