Role of soft and hard aggregates in the thermodynamics of lipid dispersions
Abstract
We study the thermodynamics of a two-dimensional polydisperse ideal gas model of different species of aggregates. We show that if these aggregates are distinguished not only by their sizes but also by their ability to display shape fluctuations, the system presents dominance of one or other species, depending on the temperature region. This result, which emerges solely from the statistics of the model in total absence of interaggregate interactions, describes well the observed temperature dependence of light scattering in dispersions of dimyristoyl phosphatidylglycerol, a negatively charged lipid.
- Publication:
-
Physical Review E
- Pub Date:
- December 1999
- DOI:
- 10.1103/PhysRevE.60.7349
- Bibcode:
- 1999PhRvE..60.7349G
- Keywords:
-
- 87.16.Dg;
- 82.60.Lf;
- 82.20.Db;
- 82.70.-y;
- Membranes bilayers and vesicles;
- Thermodynamics of solutions;
- Transition state theory and statistical theories of rate constants;
- Disperse systems;
- complex fluids