Electrostatic colloid-membrane bindingC. C. Fleck1 and R. R. Netz2
1 Fachbereich Physik, Universität Konstanz - Universitätsstr. 10 78457 Konstanz, Germany
2 Sektion Physik, LMU Munich - Theresienstrasse 37, 80333 Munich, Germany
(Received 5 January 2004; accepted in final form 12 May 2004)
We investigate the adsorption of a charged spherical colloid on an oppositely charged flexible membrane. The long-ranged character of the electrostatic interaction leads to a re-entrant unwrapping of the membrane from the sphere: only for intermediate salt concentration and colloid sizes do we find full wrapping. We derive simple scaling relations for the wrapping transitions, which agree well with results obtained by numerically minimizing the free energy with respect to the membrane shape.
87.16.Dg - Membranes, bilayers, and vesicles.
87.15.Kg - Molecular interactions; membrane-protein interactions.
87.15.Aa - Theory and modeling; computer simulation.
© EDP Sciences 2004