Dresden 2017 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 18: Poster: Colloids and Complex Fluids

CPP 18.12: Poster

Montag, 20. März 2017, 18:30–21:00, P1C

Self-assembly in solutions of designed supramolecular ferromagnetic filaments — •Ekaterina Novak1, Pedro Sanchez2, Elena Pyanzina1, and Sofia Kantorovich1,21Ural Federal University, Lenin av. 51, Ekaterinburg, 620000, Russia — 2University of Vienna, Sensengasse 8, 1090, Wien, Austria

Magnetic filaments are semi-flexible polymer-like chains of magnetic nanoparticles permanently crosslinked with polymers which have been recently shown to be promising building blocks for the creation of sophisticated magnetoresponsive materials (Sanchez et al, Faraday Discuss., 2016). Here, we investigate magnetic filaments with different conformations made out of ferromagnetic spherical nanoparticles - simple open chains, closed rings and branched structures with "X" and "Y" junctions - inspired by the recent findings on the low temperature self-assembly and ground state of dipolar hard spheres (Kantorovich et al, PCCP, 2015). Using Langevin dynamics simulations, we focus on low-concentration solutions of filaments, analyzing in detail their self-assembly. Extensive cluster analysis allows to compare the structures formed by filament solutions to those observed in "conventional" magnetic fluids containing non-crosslinked nanoparticles. These results will form the basis for developing theoretical models and provide recommendations for the design of novel magnetoresponsive systems.

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