Synthesis of nanostructured Ti thin films by combining glancing angle deposition and magnetron sputtering: A joint experimental and modeling study

Jonathan Dervaux, Pavel Moskovkin, P-A. Cormier, O. Douhéret, Stephanos Konstantinidis, Roberto Lazzaroni, Stéphane Lucas, Rony Snyders

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    Abstract

    In this work, glancing angle deposition and magnetron sputtering are combined to synthesize nanostructured Ti films. Different type of microstructures (tilted columns, straight pillars, zigzags) are obtained as a function of the
    experimental conditions. As a support, kinetic Monte Carlo simulations are performed to understand the observed trends using the NASCAM (NAnoSCAle Modeling) code. The latter is used to simulate the growth of the
    films and to explain the effect on the obtained structures of experimental parameters such as the substrate temperature, the gas pressure as well as the substrate tilting and rotation speed. NASCAM enables quantitative prediction
    of the density, the surface roughness, and the columnshape asymmetry. In addition, the effective porosity (ϕe) of the structures was evaluated from the simulation data for two molecules presenting different size (0.64 and 3.20 nm). The results show that ϕe decreases with the size of the adsorbed molecule, from above 50% for the small molecule to below 10% for the larger one. This is understood by considering the accessibility of the pore as a function of the size of the molecules. These data are correlated to experimental results obtained by
    transmission electron microscopy.
    Original languageEnglish
    Pages (from-to)644-657
    Number of pages14
    JournalThin Solid Films
    Volume636
    DOIs
    Publication statusPublished - 31 Aug 2017

    Funding

    The authors would like to thank the “Fédération Wallonie-Bruxelles” through the ARC project MADSSCELLS (AUWB-2012-12/17-UMONS No. 2), the Science Policy Office of the Belgian Federal Government through the “Pôle d'Attraction Interuniversitaire” program (PAI, P7/34, “Plasma-Surface Interaction”, Ψ and PAI 7/5 ‘Functional Supramolecular Systems’) and FNRS-FRFC. Dr Mireille RICHARD-PLOUET and Stéphane Grolleau from Institut des Matériaux Jean Rouxel de Nantes (IMN) for the porosity measurements. SK is research associate of National Fund for Scientific Research (FNRS – Belgium).

    FundersFunder number
    FNRS‐FRFC
    IMN
    Institut des Matériaux Jean Rouxel de Nantes
    Belgische Federale OverheidsdienstenP7/34
    Australian Research Council AUWB-2012-12/17-UMONS
    Fonds de la Recherche Scientifique F.R.S.-FNRS
    Fédération Wallonie-Bruxelles

      Keywords

      • Monte Carlo simulation
      • Titanium Thin films
      • Glancing angle deposition
      • Magnetron sputtering
      • Nanostructured films
      • Porosity
      • Thin films
      • Titanium

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