3D motion of flexible ferromagnetic filaments under rotating magnetic field

Abstract

Ferromagnetic filaments in a rotating magnetic field are studied both numerically and experimentally. The filaments are made from micron-sized ferromagnetic particles linked with DNA strands. It is found that at low frequencies of the rotating field a filament rotates synchronously with the field and beyond a critical frequency it undergoes a transition to a three dimensional regime. In this regime the tips of the filament rotate synchronously with the field on circular trajectories in the plane parallel to the plane of the rotating field. The characteristics of this motion found numerically match the experimental data and allow us to obtain the physical properties of such filaments. We also discuss the differences in behaviour between magnetic rods and filaments and the applicability of filaments in mixing.

arXiv commentSubmitted to RSC Soft Matter Journal , uses rsc template

References in corpus (4)

• Local viscoelasticity of living cells measured by rotational magnetic spectroscopy
• Leveraging Collective Effects in Externally Driven Colloidal Suspensions: Experiments and Simulations
• Collective beating of artificial microcilia
• Deformation of flexible ferromagnetic filaments under a rotating magnetic field

Cited by in corpus (5)

• Magnetically driven in-plane modulation of the 3D orientation of vertical ferromagnetic flakes
• Rotating hematite cube chains
• Dynamic response of a ferromagnetic nanofilament under rotating fields: effects of flexibility, thermal fluctuations and hydrodynamics
• Ferromagnetic filament shapes in a rotating field reveal their magnetoelastic properties
• Adsorption transition of a grafted ferromagnetic filament controlled by external magnetic fields