Berlin 2018 – scientific programme
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MM: Fachverband Metall- und Materialphysik
MM 47: Poster Session II
MM 47.30: Poster
Wednesday, March 14, 2018, 18:30–19:45, Poster C
Formation of porous nickel nanosystems under near-equilibrium condensation conditions using alumina membranes as a template for deposition — •Anna Kornyushchenko1, 2, Vyacheslav Perekrestov1, Stefan Ostendorp2, and Gerhard Wilde2 — 1Sumy State University, Laboratory of Vacuum Nanotechnologies, Sumy, Ukraine — 2WestfälischeWilhelms-Universität, Institute of Materials Physics, Münster, Germany
Depending on morphology porous nanostructures can possess unique physical properties what can determine areas of their application. In the present work a new technological approach has been proposed to obtain ordered porous nickel nanoclusters consisting of weakly connected uniform nanocrystals of less than 10 nm in diameter. The proposed technology uses near-equilibrium condensation conditions in combination with ultra-thin alumina membranes as templates. The conditions close to thermodynamic equilibrium have been implemented by magnetron sputtering operating at a low discharge power. It is known, that alumina membranes are being widely used in order to obtain different nanostructures on surfaces, ranging from quantum-sized nanodots to nanowires and nanotubes. However, ordered systems of nano-islands which themselves consist of weakly-bound nanocrystals of almost identical shape and size have been obtained for the first time. Therefore, the deposition of weakly supersaturated vapors through the alumina membrane pores reveals new peculiarities of the self-assembly of ordered arrays of nanostructures on substrate surfaces.