Magnetic filament brushes

Autor(en)

Pedro A. Sánchez, Elena S. Pyanzina, Ekaterina V. Novak, Joan J. Cerdà, Tomás Sintes, Sofia S. Kantorovich

Abstrakt

We present a theoretical study on the design of a supramolecular magnetoresponsive coating. The coating is formed by a relatively dense array of supracolloidal magnetic filaments grafted to a surface in a polymer brush-like arrangement. In order to determine and optimise the properties of the magnetic filament brush, we perform extensive computer simulations with a coarse-grained model that takes into account the correlations between the magnetic moments of the particles and the backbone crosslinks. We show that the self-assembly of magnetic beads from neighbouring filaments defines the equilibrium structural properties of the complete brush. In order to control this self-assembly, we highlight two external stimuli that can lead to significant effects: temperature of the system and an externally applied magnetic field. Our study reveals self-assembly scenarios inherently driven by the crosslinking and grafting constraints. Finally, we explain the mechanisms of structural changeovers in the magnetic filament brushes and confirm the possibility of controlling them by changing the temperature or the intensity of an external magnetic field.

Organisation(en)

Computergestützte Physik und Physik der Weichen Materie

Externe Organisation(en)

University of Bergen (UiB), Ural Federal University

Journal

Faraday Discussions

Band

186

Seiten

241-263

Anzahl der Seiten

23

ISSN

1359-6640

DOI

https://doi.org/10.1039/C5FD00133A

Publikationsdatum

2015

Peer-reviewed

Ja

ÖFOS 2012

103015 Kondensierte Materie, 103006 Chemische Physik, 103017 Magnetismus

Schlagwörter

ASJC Scopus Sachgebiete

Allgemeine Medizin

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/8baa5059-7e59-4056-aab5-7a58c1b1af19