hrvatski jezikClear Cookie - decide language by browser settings

Capillary assemblies in a rotating magnetic field

Grosjean, Galien; Hubert, Maxime; Collard, Ylona; Sukhov, Alexander; Harting, Jens; Smith, Ana-Sunčana; Vandewalle, Nicolas (2019) Capillary assemblies in a rotating magnetic field. Soft Matter, 15 (44). pp. 9093-9103. ISSN 1744-683X

| Request a personal copy from author


Small objects floating on a fluid have a tendency to aggregate due to capillary forces. This effect has been used, with the help of a magnetic induction field, to assemble submillimeter metallic spheres into a variety of structures, whose shape and size can be tuned. Under time-varying fields, these assemblies can propel themselves due to a breaking of time reversal symmetry in their adopted shapes. In this article, we study the influence of an in-plane rotation of the magnetic field on these structures. Various rotational modes have been observed with different underlying mechanisms. The magnetic properties of the particles cause them to rotate individually. Dipole–dipole interactions in the assembly can cause the whole structure to align with the field. Finally, non-reciprocal deformations can power the rotation of the assembly. Symmetry plays an important role in the dynamics, as well as the frequency and amplitude of the applied field. Understanding the interplay of these effects is essential, both to explain previous observations and to develop new functions for these assemblies.

Item Type: Article
Additional Information: This work was financially supported by FNRS PDR grant T.0129.18, as well as the DFG Priority Programme SPP 1726 "Microswimmers - From Single Particle Motion to Collective Behaviour''. GG thanks FRIA for financial support. Computational resources have been provided by the Consortium des Equipements de Calcul Intensif (CECI), funded by the Fonds de la Recherche Scientifique de Belgique (F.R.S.-FNRS) under Grant No. 2.5020.11.
Uncontrolled Keywords: magnetocapillary assemblies ; microswimmers
NATURAL SCIENCES > Physics > Condensed Matter Physics
Divisions: Division of Physical Chemistry
Project titleProject leaderProject codeProject type
Biological Membranes in Action: A Unified Approachto Complexation, Scaffolding and Active Ana SUnčana Smith337283EK
Depositing User: Ana Sunčana Smith
Date Deposited: 24 Mar 2020 08:39
DOI: 10.1039/c9sm01414d

Actions (login required)

View Item View Item


Downloads per month over past year

Increase Font
Decrease Font
Dyslexic Font