Viscosity control of the dynamic self-assembly in ferromagnetic suspensions

D. L. Piet, A. V. Straube, A. Snezhko, Igor Aronson

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Recent studies of dynamic self-assembly in ferromagnetic colloids suspended in liquid-air or liquid-liquid interfaces revealed a rich variety of dynamic structures ranging from linear snakes to axisymmetric asters, which exhibit novel morphology of the magnetic ordering accompanied by large-scale hydrodynamic flows. Based on controlled experiments and first principles theory, we argue that the transition from snakes to asters is governed by the viscosity of the suspending liquid where less viscous liquids favor snakes and more viscous, asters. By obtaining analytic solutions of the time-averaged Navier-Stokes equations, we gain insight into the role of mean hydrodynamic flows and an overall balance of forces governing the self-assembly. Our results illustrate that the viscosity can be used to control the outcome of the dynamic self-assembly in magnetic colloidal suspensions.

Original languageEnglish (US)
Article number198001
JournalPhysical Review Letters
Volume110
Issue number19
DOIs
StatePublished - May 7 2013

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snakes
self assembly
viscosity
colloids
hydrodynamics
liquid-liquid interfaces
liquid air
liquids
Navier-Stokes equation

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Piet, D. L. ; Straube, A. V. ; Snezhko, A. ; Aronson, Igor. / Viscosity control of the dynamic self-assembly in ferromagnetic suspensions. In: Physical Review Letters. 2013 ; Vol. 110, No. 19.
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Viscosity control of the dynamic self-assembly in ferromagnetic suspensions. / Piet, D. L.; Straube, A. V.; Snezhko, A.; Aronson, Igor.

In: Physical Review Letters, Vol. 110, No. 19, 198001, 07.05.2013.

Research output: Contribution to journalArticle

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