Universalities in the Dynamics of Suspensions of Magnetic Colloidal Chains Confined in Thin Films

• Terada Yayoi

  Institute of Fluid Science, Tohoku University

• Tokuyama Michio

  World Premier International Research Center, Advanced Institute for Materials Research, Tohoku University

Abstract

A quasi two-dimensional model of magnetic colloidal chains is examined by extensive Brownian-dynamics 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.

Journal

• Journal of the Physical Society of Japan

  Journal of the Physical Society of Japan 78 (8), 084803-084803, 2009

  THE PHYSICAL SOCIETY OF JAPAN

Keywords

• Brownian-dynamics simulation
• colloidal chains
• magnetic colloidal suspensions
• self-diffusion

Details

• CRID: 1390282679173866496
• NII Article ID: 130005437764
• NII Article ID: 210000107954
• NII Article ID: 40016692878
• NII Book ID: AA00704814
• DOI: 10.1143/jpsj.78.084803
• ISSN: 13474073
• ISSN: 00319015
• NDL BIB ID: 10317607
• Web Site: http://id.ndl.go.jp/bib/10317607
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I10317607
• Web Site: https://journals.jps.jp/doi/pdf/10.1143/JPSJ.78.084803
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed