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Träfflista för sökning "WFRF:(Schiffrer G.) "

Search: WFRF:(Schiffrer G.)

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1.
  • Guidi, V., et al. (author)
  • Diffusion-equation approach to describe ionic mobility in nanostructured titania
  • 2005
  • In: Physical Review B. Condensed Matter and Materials Physics. - 1098-0121 .- 1550-235X. ; 72:15
  • Journal article (peer-reviewed)abstract
    • The linear diffusion equation is proposed to provide a macroscopic description of ionic mobility in nanostructures. This approach has been demonstrated to account for diffusion processes in nanostructured titania-based films. The formulation of a classical diffusion inverse problem and the experimental determination of concentration profiles by Rutherford backscattering spectrometry were used for the purpose. The model has allowed the measurement of the diffusion coefficient of W and Mo impurities in titania. © 2005 The American Physical Society.
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2.
  • Vomiero, Alberto, et al. (author)
  • Application of ion beam analysis to the selective sublimation processing of thin films for gas sensing
  • 2006
  • In: Nuclear Instruments and Methods in Physics Research Section B. - : Elsevier BV. - 0168-583X .- 1872-9584. ; 249:1-2 SPEC. ISS., s. 302-305
  • Journal article (peer-reviewed)abstract
    • Ion beam analysis was successfully applied to a novel technique, named selective sublimation process (SSP), for deposition of nanostructured gas-sensing films through reactive sputtering. The method consists of the co-deposition of a mixed oxide, one of which has a relatively low sublimation temperature. Annealing at suitable temperature causes the sublimation of the most volatile compound, leaving a layer with adjustable composition. The appropriate choice of thermal treatments and the consequent tailoring of the composition play a crucial role in the determination of the microstructural properties. We developed a model based on diffusion equations that provides a useful guide to control the deposition and processing parameters and we applied the model on the systems TiO2-WO3 and TiO2-MoO3. Rutherford backscattering (RBS) was demonstrated to be effective for the characterization of the diffusion and sublimation processes during SSP. Experimental results fully agree with theoretical prediction, and allowed the calculation of all the parameters involved in SSP. © 2006 Elsevier B.V. All rights reserved.
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  • Result 1-2 of 2
Type of publication
journal article (2)
Type of content
peer-reviewed (2)
Author/Editor
Comini, E. (2)
Sberveglieri, G. (2)
Vomiero, Alberto (2)
Martinelli, G (2)
Della Mea, G. (2)
Guidi, V. (2)
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Ferroni, M. (2)
Schiffrer, G. (2)
Scian, C. (1)
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University
Luleå University of Technology (2)
Language
English (2)
Research subject (UKÄ/SCB)
Natural sciences (2)

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