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Título

Size and shape of supported zirconia nanoparticles determined by x-ray photoelectron spectroscopy

AutorYubero, Francisco ; Mansilla, C. ; Ferrer, F. J. ; Holgado, Juan P. ; González-Elipe, Agustín R.
Palabras claveZirconium compounds
Nanoparticles
X-ray photoelectron spectra
Decomposition
Island structure
Plasma CVD
Fecha de publicación26-jun-2007
EditorAmerican Institute of Physics
CitaciónJournal of Applied Physics 101(12): 124910 (2007)
ResumenThe initial stages of growth of zirconia nanoparticles deposited on SiO2, Y2O3, and CeO2 substrates have been studied by the x-ray photoelectron spectroscopy peak shape analysis. ZrO2 was deposited by plasma decomposition of a volatile Zr(OtBu)4 precursor. The electronic interactions at each particular interface formed have been followed by means of the modified Auger parameter of the deposited Zr cations. They were quantified by means of Wagner plots and the chemical state vectors of the systems. The observed changes in these local electronic probes as the amount of deposit was increased have been correlated to the particular ZrO2 nanostructures identified on each substrate considered. A Volmer-Weber (islands) growth mechanism has been found for all the substrates considered. Moreover, clear indications have been found of a columnar growth for the case of ZrO2 deposited on SiO2.
Descripción6 pages, 7 figures, 1 table.-- PACS: 68.55.Ac; 68.55.Jk; 79.60.Dp
Versión del editorhttp://dx.doi.org/10.1063/1.2749482
URIhttp://hdl.handle.net/10261/21773
DOI10.1063/1.2749482
ISSN0021-8979
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