Emergent coherent states and flow rectification in active magnetic colloidal monolayers

Gasper Kokot, Alexey Snezhko, Igor Aronson

Research output: Contribution to journalArticle

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Abstract

We report on an emergent coherent behavior of a ferromagnetic colloidal monolayer suspended at a liquid-air interface and powered by a single-axis alternating in-plane magnetic field. Large-scale coherent states are manifested by formation of dynamic vortex arrays within the colloidal monolayer. Emergence of the dynamic coherence and self-organized patterns in this non-equilibrium colloidal system is attributed to a spontaneous symmetry breaking due to subtle interplay between magnetic, steric, and hydrodynamic forces acting on individual colloidal particles. Collective response of the magnetic colloidal monolayer induces in-plane rectified hydrodynamic surface flows which in turn entrains the particles, resulting in a variety of coherent states.

Original languageEnglish (US)
Pages (from-to)6757-6760
Number of pages4
JournalSoft Matter
Volume9
Issue number29
DOIs
StatePublished - Aug 7 2013

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics

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