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Electrode effects in dielectric spectroscopy of colloidal suspensions

Author

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  • Cirkel, P.A.
  • van der Ploeg, J.P.M.
  • Koper, G.J.M.

Abstract

We present a simple model to account for electrode polarization in colloidal suspensions. Apart from correctly predicting the ω−32 dependence for the dielectric permittivity at low frequencies ω, the model provides an explicit dependence of the effect on electrode spacing. The predictions are tested for the sodium bis(2-ethylhexyl) sulfosuccinate (AOT) water-in-oil microemulsion with iso-octane as continuous phase. In particular, the dependence of electrode polarization effects on electrode spacing has been measured and is found to be in accordance with the model prediction. Methods to reduce or account for electrode polarization are briefly discussed.

Suggested Citation

  • Cirkel, P.A. & van der Ploeg, J.P.M. & Koper, G.J.M., 1997. "Electrode effects in dielectric spectroscopy of colloidal suspensions," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 235(1), pages 269-278.
    • Handle: RePEc:eee:phsmap:v:235:y:1997:i:1:p:269-278
    DOI: 10.1016/S0378-4371(96)00347-0
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