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Issue 14, 2017
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Scattering properties and internal structure of magnetic filament brushes

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Abstract

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.

Graphical abstract: Scattering properties and internal structure of magnetic filament brushes

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Publication details

The article was received on 18 Nov 2016, accepted on 12 Mar 2017 and first published on 13 Mar 2017


Article type: Paper
DOI: 10.1039/C6SM02606K
Citation: Soft Matter, 2017,13, 2590-2602
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    Scattering properties and internal structure of magnetic filament brushes

    E. S. Pyanzina, P. A. Sánchez, J. J. Cerdà, T. Sintes and S. S. Kantorovich, Soft Matter, 2017, 13, 2590
    DOI: 10.1039/C6SM02606K

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