Related Experiment Video
Updated: Jun 26, 2026

Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures
Published on: May 20, 2014
Dynamic dielectric response of concentrated colloidal dispersions: comparison between theory and experiment
B H Bradshaw-Hajek1, S J Miklavcic, L R White
1School of Mathematics and Statistics, University of South Australia, Mawson Lakes, SA 5082, Australia.
Abstract:
The cell-model electrokinetic theory of Ahualli et al. Langmuir 2006, 22, 7041; Ahualli et al. J. Colloid Interface Sci. 2007, 309, 342; and Bradshaw-Hajek et al. Langmuir 2008, 24, 4512 is applied to a dense suspension of charged spherical particles, to exhibit the system's dielectric response to an applied electric field as a function of solids volume fraction. The model's predictions of effective permittivity and complex conductivity are favorably compared with published theoretical calculations and experimental measurements on dense colloidal systems. Physical factors governing the volume fraction dependence of the dielectric response are discussed.
Related Concept Videos
The Colloidal State
Colloids and Suspensions
Colloids
Theory of Strong Electrolytes
The Debye–Hückel Theory of Electrolyte Solutions
Colloidal precipitates

