| Issue |
Europhys. Lett.
Volume 64, Number 3, November 2003
|
|
|---|---|---|
| Page(s) | 413 - 419 | |
| Section | Interdisciplinary physics and related areas of science and technology | |
| DOI | https://doi.org/10.1209/epl/i2003-00218-2 | |
| Published online | 01 November 2003 | |
Interactions between polyelectrolyte-macroion complexes
Sektion Physik, LMU - Theresienstr. 37, 80333 München, Germany
Received:
19
June
2003
Accepted:
20
August
2003
We consider structures formed by one semiflexible polyelectrolyte (PE) and one oppositely charged sphere and calculate the interaction between two such complexes within the ground-state approximation, where the PE assumes its optimal configuration. Using parameters appropriate for DNA-histone systems, we find the second virial coefficient of inter-complex interactions to be negative for intermediate salt concentrations within the range where stable complexes are formed, in agreement with experiments. A simple screened monopole-dipole model reproduces these findings.
PACS: 87.15.-v – Biomolecules: structure and physical properties / 82.70.-y – Disperse systems; complex fluids / 61.25.Hq – Macromolecular and polymer solutions; polymer melts; swelling
© EDP Sciences, 2003
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