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Mar 20 – 23, 2023
Campus Garching
Europe/Berlin timezone

Electric field-induced assembly of magnetic nanoparticles in ferrofluids

Mar 20, 2023, 4:00 PM
Yards 4 - 6 (Fakultät für Maschinenwesen)

Yards 4 - 6

Fakultät für Maschinenwesen

Board: MO-185
Poster Soft Condensed Matter Poster Session MONDAY


Viktor Petrenko (BCMaterials. Basque center for materials, applications & nanostructures)


Stimuli responsive materials, which can self-assemble depending on the environment, are of great interest. In this context nanoparticles offer unique opportunities as they can be custom designed and it is very important to understand the assembly mechanisms to control the resulting structures, which is crucial for the synthesis of materials with controllable properties. It is well known, that properties of ferrofluids can be controlled by external magnetic field. However, inhomogeneous distribution of magnetic particles in non-polar ferrofluids was observed recently under external electric fields and formation of large aggregates was concluded in such systems. And it was also concluded, that electric fields, similar to magnetic fields, could be a driven force to induce the assembly of magnetic nanoparticles (MNPs) in bulk and at the interface.
Thus, it was shown by SANS that aggregation process depends on the electric field strength. Impact of temperature on such aggregation was also concluded according to SANS experiments. Maximum changes in the magnetic structures of the particles under application of both magnetic and electric fields were observed by SANSPOL. Assembling of MNPs from non-polar ferrofluid on a planar surface and further evolution of the interface structure under electric field application were studied by NR. The reason of the observed effects is related to the polarization of the particles in the electric field and their interaction as dipoles.

Primary author

Viktor Petrenko (BCMaterials. Basque center for materials, applications & nanostructures)


Dr Artem Feoktystov (Jülich Centre for Neutron Science, Heinz Maier-Leibnitz Zentrum) Dr Dirk Honecker (ISIS Neutron and Muon Source) Mr Maksym Karpets (Institute of Experimental Physics SAS) Dr Michal Rajnak (Institute of Experimental Physics SAS) Dr Peter Kopcansky (Institute of Experimental Physics SAS) Dr Vitaliy Pipich (Jülich Centre for Neutron Science JCNS at Heinz Maier-Leibnitz Zentrum MLZ Forschungszentrum Jülich GmbH)

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