Zipping mechanism for force-generation by growing filament bundles

Details Zipping mechanism for force-generation by growing filament bundles Zipping mechanism for force-generation by growing filament bundles

2011-03-02

arxiv.org/abs/1103.0399v1

EPL 86, 68002 (2009)

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

We investigate the force generation by polymerizing bundles of filaments, which form because of short-range attractive filament interactions. We show that bundles can generate forces by a zipping mechanism, which is not limited by buckling and operates in the fully buckled state. The critical zipping force, i.e. the maximal force that a bundle can generate, is given by the adhesive energy gained during bundle formation. For opposing forces larger than the critical zipping force, bundles undergo a force-induced unbinding transition. For larger bundles, the critical zipping force depends on the initial configuration of the bundles. Our results are corroborated by Monte Carlo simulations.

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