High-frequency stress relaxation in semiflexible polymer solutions and networks.
We measure the linear viscoelasticity of sterically entangled and chemically cross-linked networks of actin filaments over more than five decades of frequency. The high-frequency response reveals rich dynamics unique to semiflexible polymers, including a previously unobserved relaxation due to rapid axial tension propagation. For high molecular weight, and for cross-linked gels, we obtain quantitative agreement with predicted shear moduli in both amplitude and frequency dependence.
Koenderink
G H
GH
Department of Physics and Astronomy, Vrije Universiteit, Amsterdam, The Netherlands.
Atakhorrami
M
M
MacKintosh
F C
FC
Schmidt
C F
CF
D008841:Actin Cytoskeleton / Q000737:chemistry*; D003432:Cross-Linking Reagents / Q000737:chemistry; D004548:Elasticity; D005782:Gels / Q000737:chemistry; D008962:Models, Theoretical; D014783:Viscosity
D003432:Cross-Linking Reagents; D005782:Gels