| Issue |
Europhys. Lett.
Volume 36, Number 3, October III 1996
|
|
|---|---|---|
| Page(s) | 215 - 220 | |
| Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
| DOI | https://doi.org/10.1209/epl/i1996-00213-1 | |
| Published online | 01 September 2002 | |
Theory of dielectric response of charged-bilayer-vesicle solutions
Cavendish Laboratory, Madingley Road, Cambridge CB3 OHE, UK
Received:
20
May
1996
Accepted:
15
September
1996
The dielectric response is calculated for a solution containing
charged bilayer vesicles and simple electrolyte.
The solution is
assumed to contain a high salt concentration so that the Debye
screening length is small compared to the size of the vesicles.
The presence of two (electric) double layers, one on each side of the
bilayer, gives low-frequency salt relaxations (kHz for 
vesicles)
that explain the experimentally observed α relaxations which are
known to appear only for charged vesicles.
The double layers also
modify the high-frequency β relaxations which have been
previously modeled by using the Maxwell-Wagner
theory. The calculation method can be easily extended to other bilayer
geometries.
PACS: 77.22.Gm – Dielectric loss and relaxation / 77.84.Nh – Liquids, emulsions, and suspensions; liquid crystals / 87.22.Bt – Membranes and subcellular physics and structure
© EDP Sciences, 1996
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