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EELS Investigations of Different Niobium Oxide Phases

Published online by Cambridge University Press:  19 September 2006

D. Bach ,
H. Störmer ,
R. Schneider ,
D. Gerthsen  and
J. Verbeeck
D. Bach
Affiliation:
Laboratorium für Elektronenmikroskopie, Universität Karlsruhe (TH), D-76128 Karlsruhe, Germany
H. Störmer
Affiliation:
Laboratorium für Elektronenmikroskopie, Universität Karlsruhe (TH), D-76128 Karlsruhe, Germany
R. Schneider
Affiliation:
Laboratorium für Elektronenmikroskopie, Universität Karlsruhe (TH), D-76128 Karlsruhe, Germany
D. Gerthsen
Affiliation:
Laboratorium für Elektronenmikroskopie, Universität Karlsruhe (TH), D-76128 Karlsruhe, Germany
J. Verbeeck
Affiliation:
Electron Microscopy for Materials Research (EMAT), University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
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Abstract

Electron energy loss spectra in conjunction with near-edge fine structures of purely stoichiometric niobium monoxide (NbO) and niobium pentoxide (Nb2O5) reference materials were recorded. The structures of the niobium oxide reference materials were checked by selected area electron diffraction to ensure a proper assignment of the fine structures. NbO and Nb2O5 show clearly different energy loss near-edge fine structures of the Nb-M4,5 and -M2,3 edges and of the O-K edge, reflecting the specific local environments of the ionized atoms. To distinguish the two oxides in a quantitative manner, the intensities under the Nb-M4,5 as well as Nb-M2,3 edges and the O-K edge were measured and their ratios calculated. k-factors were also derived from these measurements.

Keywords

niobium monoxideniobium pentoxideEELSELNESquantificationstoichiometry
Type
MICROANALYSIS
Information
Microscopy and Microanalysis , Volume 12 , Issue 5 , October 2006 , pp. 416 - 423
Copyright
© 2006 Microscopy Society of America

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