Abstract
Static and dynamic electric birefringence measurements are performed on dispersions of electrically charged fluorinated latex spheres. It is shown that the Kerr constant is made up of three contributions: the first depends on the intrinsic and form anisotropy of the particle; the second arises from the presence of a slowly fluctuating electric dipole which should be originated by the statistics of the surface charge distribution, and the third is connected with the cloud of dissociated counter-ions. This latter contribution shows a non-Lorentzian frequency dispersion, and its amplitude is strongly dependent on the particle concentration and on the ionic strength.
| Original language | English |
|---|---|
| Pages (from-to) | 8683-8696 |
| Number of pages | 15 |
| Journal | Journal of Physics: Condensed Matter |
| Volume | 4 |
| Issue number | 45 |
| DOIs | |
| Publication status | Published - 9 Nov 1992 |
Keywords
- electric birefringence
- Kerr effect
- colloids
ASJC Scopus subject areas
- Condensed Matter Physics
- Atomic and Molecular Physics, and Optics
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