[en] When ferromagnetic particles are suspended at an interface under magnetic fields, dipole-dipole interactions compete with capillary attraction. This combination of forces has recently given promising results towards controllable self-assemblies as well as low-Reynolds-number swimming systems. The elementary unit of these assemblies is a pair of particles. Although equilibrium properties of this interaction are well described, the dynamics remain unclear. In this paper, the properties of magnetocapillary bonds are determined by probing them with magnetic perturbations. Two deformation modes are evidenced and discussed. These modes exhibit resonances whose frequencies can be detuned to generate nonreciprocal motion. A model is proposed that can become the basis for elaborate collective behaviors.
Disciplines :
Physics
Author, co-author :
Lagubeau, Guillaume; Universidad de Santiago de Chile > Departamento de Fìsica
Grosjean, Galien ; Université de Liège > Département de physique > Physique statistique
Darras, Alexis ; Université de Liège > Département de physique > Physique expér. de la matière molle et des syst. complexes
Lumay, Geoffroy ; Université de Liège > Département de physique > Physique expér. de la matière molle et des syst. complexes
Hubert, Maxime ; Université de Liège > Département de physique > Physique statistique
Vandewalle, Nicolas ; Université de Liège > Département de physique > Physique statistique
Language :
English
Title :
Statics and dynamics of magnetocapillary bonds
Publication date :
31 May 2016
Journal title :
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
ISSN :
1539-3755
eISSN :
1550-2376
Publisher :
American Physical Society, College Park, United States - Maryland
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE] FRIA - Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture [BE] UE - Union Européenne [BE]
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