Indirect interactions of membrane-adsorbed cylinders

Biological and biomimetic membranes often contain aggregates of embedded or adsorbed macromolecules. In this paper, 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 equilibriu...

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Bibliographic Details
Published in:The European physical journal. E, Soft matter and biological physics Soft matter and biological physics, 2003-10, Vol.12 (2), p.265-273
Main Author: WEIKL, T. R
Format: Article
Language:English
Subjects:
Adsorption
Binding Sites
Cell Adhesion - physiology
Cell Membrane - physiology
Chemistry
Colloidal state and disperse state
Computer Simulation
Elasticity
Exact sciences and technology
General and physical chemistry
Lipid Bilayers - chemistry
Lipid Bilayers - metabolism
Membrane Fluidity
Membranes
Membranes, Artificial
Models, Biological
Models, Chemical
Static Electricity
Stress, Mechanical
Surface Properties
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Summary:Biological and biomimetic membranes often contain aggregates of embedded or adsorbed macromolecules. In this paper, 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.
ISSN:1292-8941
1292-895X
DOI:10.1140/epje/i2003-10058-x