Journal ArticleDOI
Use of QUASES™/XPS measurements to determine the oxide composition and thickness on an iron substrate
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TLDR
In this paper, the extrinsic loss structures for XPS spectra of oxide films grown on iron in such a way that their thickness and structure could be determined using Generate and Analyze.Abstract:
QUASES Analyze and Generate were used to model the extrinsic loss structures for XPS spectra of oxide films grown on iron in such a way that their thickness and structure could be determined. The Generate program used in conjunction with spectra of model iron oxides allowed for both magnetite (Fe 3 O 4 ) and maghaemite (γ-Fe 2 O 3 ) structures to be identified in all films studied. These structures were identified as overlying layers in the oxide films and were usually intermixed at their interface. The absence of other iron oxide structures within the film could be tested based on their goodness of fit to the experimental spectrum. Comparison of the thickness values obtained using Generate with those found using nuclear reaction analysis suggested that the Generate results were higher by 20%. This difference likely resulted from the use of a calculated inelastic mean free path value for Fe 2p electrons in the Generate calculation rather than using the real attenuation length. For oxide films whose thickness approached 10 nm, the QUASES results for photoelectron spectra obtained with a Zr achromatic x-ray source were compared with those from the standard Al monochromatic source. In this particular case, the oxide thicknesses obtained using Generate and Analyze were found to be more consistent when the Zr source was used.read more
Citations
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Journal ArticleDOI
Investigation of multiplet splitting of Fe 2p XPS spectra and bonding in iron compounds
TL;DR: In this paper, the authors investigated the usefulness of calculated multiplet peaks to fit high-resolution iron 2p3/2 spectra from high-spin compounds. And they found that the multiplets were found to fit most spectra well, particularly when contributions attributed to surface peaks and shake-up satellites were included.
Journal ArticleDOI
Characterization of the “native” surface thin film on pure polycrystalline iron: A high resolution XPS and TEM study
TL;DR: In this article, a high-resolution X-ray photoelectron (XP) spectroscopy of pure polycrystalline iron was used to determine the chemical composition and thickness of the surface thin film.
Journal ArticleDOI
Chemical state quantification of iron and chromium oxides using XPS: the effect of the background subtraction method
TL;DR: In this paper, the effect of background subtraction on the analysis results of X-ray photoelectron spectroscopy (XPS) was studied for the case of two chemical states in both samples.
Journal ArticleDOI
XPS depth profiling study on the passive oxide film of carbon steel in saturated calcium hydroxide solution and the effect of chloride on the film properties
TL;DR: In this article, the properties of passive oxide films that form on carbon steel in saturated calcium hydroxide solution and the effect of chloride on the film properties were studied using X-ray photoelectron spectroscopy.
Journal ArticleDOI
Large-Scale Synthesis of Colloidal Fe3O4 Nanoparticles Exhibiting High Heating Efficiency in Magnetic Hyperthermia
Yury V. Kolen'ko,Manuel Bañobre-López,Carlos Rodríguez-Abreu,Enrique Carbó-Argibay,Alexandra Sailsman,Yolanda Piñeiro-Redondo,M. Fátima Cerqueira,Dmitri Y. Petrovykh,Kirill Kovnir,Oleg I. Lebedev,José Rivas +10 more
TL;DR: In this article, the authors report successful gram-scale syntheses, via hydrothermal route or controlled coprecipitation in an automated reactor, of colloidal Fe3O4 nanoparticles with sizes of 12.9 ± 5.9, 17.6 ± 4.4, and 19.8 ± 3.2 nm.
References
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Book
The iron oxides: structure, properties, reactions, occurrences and uses.
R. M. Cornell,Udo Schwertmann +1 more
TL;DR: In this article, the authors introduce the concept of iron oxides and their properties, including surface chemistry and Colloidal stability, as well as their properties in terms of surface area and porosity.
Book
The iron oxides: structure, properties, reactions, occurrence and uses.
R. M. Cornell,Udo Schwertmann +1 more
TL;DR: An essential volume in industry and to all researchers who, whatever their background and level of experience, are interested in this rapidly expanding field as discussed by the authors, is a good resource for anyone interested in the field.
Journal ArticleDOI
XPS for Quantitative Analysis of Surface Nano-structures
TL;DR: Extended abstract of a paper presented at Microscopy and Microanalysis 2005 in Honolulu, Hawaii, USA, July 31--August 4, 2005 shows that high resolution high-resolution X-ray diffraction analysis of Na6(CO3)(SO4)– Na2SO4 data shows high levels of signal-to-noise correspondence.