Scattering properties and internal structure of magnetic filament brushes

Autor(en)

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

Abstrakt

Practical applications of polymer brush-like systems rely on a clear understanding of their internal structure. In the case of magnetic nanoparticle filament brushes, the competition between bonding and nonbonding interactions-including long range magnetic dipole-dipole interactions-makes the microstructure of these polymer brush-like systems rather complex. On the other hand, the same interactions open up the possibility to manipulate the meso- and macroscopic responses of these systems by applying external magnetic fields or by changing the background temperature. In this study, we put forward an approach to extract information about the internal structure of a magnetic filament brush from scattering experiments. Our method is based on the mapping of the scattering profiles to the information about the internal equilibrium configurations of the brushes obtained from computer simulations. We show that the structure of the magnetic filament brush is strongly anisotropic in the direction perpendicular to the grafting surface, especially at low temperatures and external fields. This makes slice-by-slice scattering measurements a technique very useful for the study of such systems.

Organisation(en)

Computergestützte Physik und Physik der Weichen Materie

Externe Organisation(en)

University of the Balearic Islands, Ural Federal University

Journal

Soft Matter

Band

13

Seiten

2590 -2602

Anzahl der Seiten

13

ISSN

1744-683X

DOI

https://doi.org/10.1039/C6SM02606K

Publikationsdatum

2016

Peer-reviewed

Ja

ÖFOS 2012

103015 Kondensierte Materie, 103006 Chemische Physik

Schlagwörter

ASJC Scopus Sachgebiete

Condensed Matter Physics, Allgemeine Chemie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/344a3945-a931-4163-84c9-0481d52f9866