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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    Résumé

    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.
    langue originaleAnglais
    Pages (de - à)644-657
    Nombre de pages14
    journalThin Solid Films
    Volume636
    Les DOIs
    Etat de la publicationPublié - 31 août 2017

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