Berlin 2005 – wissenschaftliches Programm

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AKB: Biologische Physik

AKB 10: Biopolymers

AKB 10.2: Hauptvortrag

Freitag, 4. März 2005, 10:15–10:45, TU H2013

Driven Stiff Polymers — •Roland Netz — Physik Department, TU Muenchen, 85748 Garching

We consider stiff polymers in various non-equilibrium situations. Polymers that are anchored to surfaces, so-called brushes, are subject to shear flow and as a result deform and screen the hydrodynamic flow to various degrees, as relevant for glycocalix layers at endothelial cells in the blood stream. Conversely, stiff polymers at surfaces that are beating back and forth can be used to pump liquids over surfaces, which is a concept realized by ciliae but also attractive for synthetic designs. Elasticity is important here because for rigid rods the pumping efficiency is zero.