| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 9675533 | Colloids and Surfaces A: Physicochemical and Engineering Aspects | 2005 | 10 Pages |
Abstract
We have investigated the complexation process between cationic liposomes built up by dioleoyltrimethylammoniumpropane [DOTAP] and linear polyelectrolytes, employing three different polyions with different charge density and flexibility, such as a single-stranded (ss)DNA, a double-stranded (ds)DNA and the sodium polyacrylate [NaPAA]. Dynamic light scattering (DLS) and transmission electron microscopy (TEM) measurements support a “reentrant condensation” scenario and suggest the presence of an arrested state occurring in polyelectrolyte-liposome suspensions, in the presence of high salt concentration. A simple phenomenological model is presented, describing the formation of large “equilibrium clusters”, close to the isoelectric condition.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Colloid and Surface Chemistry
Authors
S. Sennato, F. Bordi, C. Cametti, A. Di Biasio, M. Diociaiuti,