Póster: Assembly of iron oxide nanocuboids directed by surface, ligand, and magnetic interactions

RODRÍGUEZ-SOTELO, S.J.; PASSEGGI (JR.), M.C.G.; GARCÍA, C.; STANKOVIC, I.

Dresden (Germany), 26-31 March

Otro; SKM2023, DPG Spring Meeting of the Condensed Matter Section (SKM); 2023

Deutsche Physikalische Gesellschaft

The direction of the dipole moment in the magnetite spherical nanoparticles is unrelated to the morphology particle. For non-spherical particles, a coupling between particle form and magnetic moment direction might result in unexpected behaviours, specially when the moment is not aligned along a particle symmetry axis. We introduce energy models accounting for the directionality and magnitude of the van der Waals and dipolar interactions as a function of the shape of the nanocubes, illustrating the importance of the directional dipolar forces for the formation of the nanocube clusters, the dominance of the van der Waals multibody interactions and exclusion forces of ligands. We illustrate how minimal energy structures depend on the assembly size, shape of the particles, and the balance of surface and magnetic dipolar coupling.Expuso: RODRÍGUEZ-SOTELO, S.J.