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O: Fachverband Oberflächenphysik

O 52: Nanostructures at Surfaces: Dots, Particles, Clusters

O 52.10: Poster

Dienstag, 21. März 2017, 18:30–20:30, P1C

Synthesis of transition metal oxide nanoparticles by thermal decomposition of metal oleate precursors — •Aladin Ullrich, Mostafizar Mohammad Rahman, and Siegfried Horn — Institut für Physik, Universität Augsburg, D-86159 Augsburg, Germany

Iron oxide nanoparticles are currently one of the most interesting materials due to unique properties and potential applications. The size, shape and size distribution of iron oxide nanoparticles have great influence on their physical properties and therefore on their application potential.

We have investigated the influence of synthesis parameters like the heating rate or surfactants on particle size, shape and size distribution of iron oxide nanoparticles applying the method of thermal decomposition of iron oleate precursor. The particle size varies from 14-24 nm for different heating rates (from 1 to 35°C/min) in our experiments. Spherical nanoparticles were obtained in the presence of oleic acid as surfactant, cubic nanoparticles were obtained using a mixture of oleic acid and Na-oleate as surfactants. Different size distributions are observed for different heating rates. Magnetic properties of different sized particles were investigated using SQUID magnetometry. In addition, manganese ferrite nanoparticles with varying Fe:Mn ratio were synthesized. The influence of the Fe:Mn ratio on the Curie temperature and saturation magnetization of the nanoparticles was investigated.