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Dresden 2020 – scientific programme

The DPG Spring Meeting in Dresden had to be cancelled! Read more ...

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MA: Fachverband Magnetismus

MA 18: Magnetic Particles and Clusters

MA 18.3: Talk

Monday, March 16, 2020, 17:15–17:30, HSZ 403

Unravelling the Nucleation, Growth, and Faceting of Magnetite-Gold NanohybridsYulia A. Nalench1, Igor V. Shchetinin1, Alexander S. Skorikov2, Pavel S. Mogilnikov1, Michael Farle3, Alexander G. Savchenko1, Alexander G. Majouga1,2,4, Maxim A. Abakumov1,5, and •Ulf Wiedwald1,31National University of Science and Technology MISIS, Moscow, Russia — 2Lomonosov Moscow State University, Russia — 3Faculty of Physics and Center for Nanointegration Duisburg-Essen, University of Duisburg-Essen, Germany — 4D. Mendeleev University of Chemical Technology of Russia, Moscow, Russia — 5Department of Medical Nanobiotechnology, Russian National Research Medical University, Moscow, Russia

We study the nucleation and growth processes of Fe3O4Au hybrid NPs in detail by taking probes of the reaction mixture during synthesis and analysis using laboratory equipment (TEM, XRD, and magnetometry) for typically 10 µL samples. From the three independent experiments we extract the NP size at 12 stages of the synthesis showing identical trends and good quantitative agreement. Two independent processes occur during synthesis of Fe3O4Au NPs, the nucleation and growth of spherical Fe3O4 NPs on the surface of Au seeds during the heating stage and their faceting towards octahedral shape during reflux. Stopping the reaction at a certain point allows to adjust the NP size and shape improving e.g. their capabilities in biomedical applications.

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