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BP: Fachverband Biologische Physik

BP 38: Focus: Charge Effects in Soft and Biological Matter III (joint CPP, BP, ST)

BP 38.1: Hauptvortrag

Freitag, 26. März 2010, 10:15–10:45, H45

Charge inversion in macromolecular systems — •Christian Holm — Institut für Computerphysik, Universität Stuttgart, Pfaffenwaldring 27, 70569 Stuttgart, Germany

We discuss our current understanding of the phenomenon of charge inversion in macromolecular systems, based on simulational results in recent years. In this approach the solvent has been incorporated only as an implicit dielectric background, whereas all charges and salt ions are treated explicitly. We will also discuss our recent work on modelling electrophoresis of charged polymers within a coarse grained approach, where the solvent degrees of freedom have been modelled using a Lattice-Boltzmann algorithm.

[1] R. Messina, C. Holm, K. Kremer,Ground state of two unlike charged colloids: an analogy with ionic bonding, Euro. Phys. Lett., 51, 461 (2000).

[2] O. Lenz, C. Holm, Simulation of charge reversal in salty environments: Giant overcharging?, Euro. Phys. J. E 26, 191-195 (2008).

[3] K. Grass, C. Holm Mesoscale modelling of polyelectrolyte electrophoresis, Faraday Discuss. 144, 57-70 (2010).