Universalities in the dynamics of suspensions of magnetic colloidal chains confined in thin films

Yayoi Terada, Michio Tokuyama

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

A quasi two-dimensional model of magnetic colloidal chains is examined by extensive Browniandynamics simulations on dilute suspensions of monodisperse magnetic colloidal chains confined in thin films at different thicknesses under an external magnetic field applied perpendicular to the films. Universalities in the dynamics of chains are explored based on the mean-field theory recently proposed by Tokuyama. The long-time self-diffusion coefficient of a chain is shown to obey a singular function of a control parameter proportional to the square of the applied field strength. The value of the control parameter at the singular point, where the long-time self-diffusion coefficient of a chain becomes zero, is then shown to be inversely proportional to the square of the number of magnetic colloids forming one chain.

Original languageEnglish
Article number084803
Journaljournal of the physical society of japan
Volume78
Issue number8
DOIs
Publication statusPublished - 2009 Aug

Keywords

  • Brownian-dynamics simulation
  • Colloidal chains
  • Magnetic colloidal suspensions
  • Self-diffusion

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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