Berlin 2012 – scientific programme

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BP: Fachverband Biologische Physik

BP 27: Posters: Cytoskeletal Filaments

BP 27.16: Poster

Thursday, March 29, 2012, 17:30–19:30, Poster A

Shear-induced wrinkling in random and regular semiflexible polymer networks — •Pascal Müller and Jan Kierfeld — Physics Department, TU Dortmund, Dortmund

Networks of semiflexible polymers such as F-actin are one of the main components in the cytoskeleton and determine the elastic properties of the cell.
We study the elastic properties of filamentous networks by energy minimisation of deformed two-dimensional networks with regular and random geometries. The planar two-dimensional networks are embedded in three-dimensional space, and our main focus is the investigation of wrinkling under shear stress by enabling transversal displacements of the network sheet. We compare triangular networks to random networks in order to identify the impact of network geometry on different wrinkle properties such as amplitude, wavelength, and the critical shear stress that is required to induce wrinkling.