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

Autor(en)

Joan J. Cerdà, Pedro A. Sánchez, Daniel Lüsebrink, Sofia Kantorovich, Tomás Sintes

Abstrakt

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.

Organisation(en)

Computergestützte Physik und Physik der Weichen Materie

Externe Organisation(en)

University of the Balearic Islands, University of British Columbia (UBC)

Journal

Physical Chemistry Chemical Physics

Band

18

Seiten

12616-12625

Anzahl der Seiten

10

ISSN

1463-9076

DOI

https://doi.org/10.1039/C6CP00923A

Publikationsdatum

2016

Peer-reviewed

Ja

ÖFOS 2012

103015 Kondensierte Materie, 103006 Chemische Physik

Schlagwörter

ASJC Scopus Sachgebiete

Allgemeine Physik und Astronomie, Physical and Theoretical Chemistry

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/04e933e7-5ee0-4646-a5cb-8bc56ef69516