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BP: Fachverband Biologische Physik

BP 7: Fibers and Bundles

BP 7.5: Vortrag

Montag, 26. März 2007, 17:15–17:30, H44

Force generation by growing filament bundles — •Jan Kierfeld, Torsten Kühne, and Reinhard Lipowsky — Max-Planck-Institut für Kolloid- und Grenzflächenforschung, Science Park Golm, 14424 Potsdam

Force generation by polymerizing bundles of semiflexible filaments, which are formed due to attractive filament interactions, is investigated theoretically using Monte-Carlo simulations and analytical arguments. If a compressive force is applied to the end of a bundle it can undergo a force-induced unbundling transition. A polymerizing bundle can generate forces either by a zipping mechanism, which converts adhesive energy into force, or by a polymerization mechanism, which converts the energy gain upon adding monomers into force. Limitations from the buckling instability of the bundle are discussed for both mechanisms.