Dresden 2011 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 36: Micro- and Nanostructured Magnetic Materials III
MA 36.3: Vortrag
Mittwoch, 16. März 2011, 15:15–15:30, HSZ 103
Self assembled Iron Oxide Nanoparticles - Variation of the growth process analysed by GISAXS — •Elisabeth Josten1, Ulrich Rücker1, Denis Korolkov3, Erik Wetterskog2, Artur Glavic1, Sabrina Disch1, Raphael Hermann1, Florian Menau4, Lennard Bergström2, and Thomas Brückel1,3 — 1IFF-4, Forschungszentrum Jülich, 52425 Jülich — 2Stockholm Universitet, Department of Materials and Environmental Chemistry, Stockholm, Sweden — 3JCNS, Forschungszentrum Jülich, Garching, Germany — 4Synchrotron Soleil, L′Orme des Merisiers, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette, France
Fundamental research on magnetic nanostructures is an important part of todays science in the field of information technology. Highly ordered 3 dimensional structures of nanoparticles are model systems to study the magnetic inter-particle interactions. In this investigation we studied the influence of growth parameters on the ordering of the superstructures. Monodisperse Fe2O3 nanoparticles have been deposited on a substrate to form highly ordered superstructures (mesocrystals) using drop casting. The type of order in these superstructures has shown dependency on the nanoparticle shape and deposition conditions. Structural surface characterization was carried out by SEM and AFM. The 3D order has been investigated by GISAXS. We found that mesocrystalline order of the nanoparticles in the µm-range appears under appropiate conditions.Additionally a simulation of the GISAXS pattern was developed, which describes well the observed intensity.