Berlin 2008 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 17: SYMPOSIUM Driven Soft Matter II
CPP 17.4: Vortrag
Dienstag, 26. Februar 2008, 15:15–15:30, C 130
Are we built of glass? — •Klaus Kroy1,3, Pablo Fernandez2, Jens Glaser1, Christian Hubert1, Sebastian Sturm1, and Lars Wolff1 — 1Universität Leipzig, Leipzig, Germany — 2Technische Universität München, Garching, Germany — 3Hahn-Meitner Institut, Berlin, Germany
Recently B. Fabry and J. Fredberg [1] discovered that biological cells fall into the broad class of materials exhibiting ‘soft glassy rheology’ [2]. The glassy wormlike chain (GWLC) is a minimal extension of the standard WLC model of a stiff biopolymer, which establishes a link between this observation and the microscopic interactions of the polymeric constituents of the cytoskeleton [3]. Some of its major predictions for the nonlinear and non-equilibrium mechanical response of biopolymer networks to large driving forces will be outlined and compared to experimental data. On this basis, fundamental aspects of mechano-transduction, nonlinear cell elasticity and plasticity become accessible to theory.
[1] Fabry B, Maksym G. N, Butler J. P, Glogauer M, Navajas D, Fredberg J. J., Phys. Rev. Lett. 87 (2001) 148102
[2] Sollich P, Lequeux F, Hebraud P, Cates M. E., Phys. Rev. Lett. 78 (1997) 2020.
[3] arXiv:0705.049, arXiv:0711.2427