Indirect interactions of membrane-adsorbed cylinders

Details Indirect interactions of membrane-adsorbed cylinders Indirect interactions of membrane-adsorbed cylinders

2003-09-12

arxiv.org/abs/cond-mat/0309322v2

Physics

Condensed Matter

Soft Condensed Matter

9 pages, 8 figures; typos corrected

Scientific paper

10.1140/epje/i2003-10058-x

Biological and biomimetic membranes often contain aggregates of embedded or adsorbed macromolecules. In this article, the indirect interactions of cylindrical objects adhering to a planar membrane are considered theoretically. The adhesion of the cylinders causes a local perturbation of the equilibrium membrane shape, which leads to membrane-mediated interactions. For a planar membrane under lateral tension, the interaction is repulsive for a pair of cylinders adhering to the same side of the membrane, and attractive for cylinders adhering at opposite membrane sides. For a membrane in an external harmonic potential, the interaction of adsorbed cylinders is always attractive and increases if forces perpendicular to the membrane act on the cylinders.

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