Cell model and Poisson-Boltzmann theory: A brief introduction
| dc.creator | Deserno, Markus | |
| dc.creator | Holm, Christian | |
| dc.date | 2001-12-06 | |
| dc.date.accessioned | 2026-07-07T02:43:45Z | |
| dc.date.available | 2026-07-07T02:43:45Z | |
| dc.description | The cell-model and its treatment on the Poisson-Boltzmann level are two important concepts in the theoretical description of charged macromolecules. In this brief contribution to the Proceedings of the NATO-ASI on ``Electrostatic Effects in Soft Matter and Biophysics'', which took place in Les Houches from Oct. 1-13, 2000, we provide an introduction to both ideas and summarize a few important results which can be obtained from them. We outline the sequence of approximations which ultimately lead to the cell-model. Then we present two exact results, namely, an expression for the osmotic pressure and a formula for the ion density at the surface of the macromolecule, known as the contact value theorem. The next section provides a derivation of the Poisson-Boltzmann equation from a variational principle and the assumption of a product state. Afterwards we apply Poisson-Boltzmann theory to the cell-model of linear polyelectrolytes. In particular, the behavior of the exact solution in the limit of zero density is compared to the concept of Manning condensation. Finally, we demonstrate how a system described by a cell model can be coupled to a salt reservoir, i.e., how the so-called Donnan equilibrium is established. | |
| dc.description | 24 pages, 4 Postscript figures, uses crckapb.sty (included) | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0112096 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0112096 | |
| dc.identifier | in ``Electrostatic Effects in Soft Matter and Biophysics'', eds. C. Holm, P. K'ekicheff, and R. Podgornik, NATO Science Series II - Mathematics, Physics and Chemistry, Vol. 46, Kluwer, Dordrecht (2001) | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/18622 | |
| dc.subject | Soft Condensed Matter | |
| dc.title | Cell model and Poisson-Boltzmann theory: A brief introduction | |
| dc.type | text |