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Issue 18, 2016
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Flexible magnetic filaments under the influence of external magnetic fields in the limit of infinite dilution

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Abstract

In the present work we use Langevin dynamics computer simulations to understand how the presence of a constant external magnetic field modifies the conformational phase diagram of magnetic filaments in the limit of infinite dilution. We have considered the filaments immersed in either a good (non-sticky filaments) or a poor (Stockmayer polymers) solvent. It has been found that in the presence of an applied field, filaments turn out to be much more susceptible to parameters such as temperature and solvent conditions. Filaments owe this increased susceptibility to the fact that the external magnetic field tends to level the free energy landscape as compared to the zero-field case. The field induces equalization in the free energy of competing conformational states that were separated by large energy differences in the zero-field limit. In this new scenario multistability arises, and manifests itself in the existence of broad regions in the phase diagram where two or more equilibrium configurations coexist. The existence of multistability greatly enhances the possibility of tuning the properties of the filament.

Graphical abstract: Flexible magnetic filaments under the influence of external magnetic fields in the limit of infinite dilution

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Publication details

The article was received on 10 Feb 2016, accepted on 30 Mar 2016 and first published on 31 Mar 2016


Article type: Paper
DOI: 10.1039/C6CP00923A
Author version available: Download Author version (PDF)
Citation: Phys. Chem. Chem. Phys., 2016,18, 12616-12625
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    Flexible magnetic filaments under the influence of external magnetic fields in the limit of infinite dilution

    J. J. Cerdà, P. A. Sánchez, D. Lüsebrink, S. Kantorovich and T. Sintes, Phys. Chem. Chem. Phys., 2016, 18, 12616
    DOI: 10.1039/C6CP00923A

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