Cross-Link-Governed Dynamics of Biopolymer Networks
Broedersz, Chase P.
Yao, Norman Y.
Pollak, Martin R.
Weitz, David A.
MacKintosh, Frederick C.
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CitationBroedersz, Chase P., Martin Depken, Norman Y. Yao, Martin R. Pollak, David A. Weitz, and Frederick C. MacKintosh. 2010. “Cross-Link-Governed Dynamics of Biopolymer Networks.” Physical Review Letters105 (23): 238101. https://doi.org/10.1103/PhysRevLett.105.238101.
AbstractRecent experiments show that networks of stiff biopolymers cross-linked by transient linker proteins exhibit complex stress relaxation, enabling network flow at long times. We present a model for the dynamics controlled by cross-links in such networks. We show that a single microscopic time scale for cross-linker unbinding leads to a broad spectrum of macroscopic relaxation times and a shear modulus G similar to omega(1/2) for low frequencies omega. This model quantitatively describes the measured rheology of actin networks cross-linked with alpha-actinin-4 over more than four decades in frequency.
Citable link to this pagehttp://nrs.harvard.edu/urn-3:HUL.InstRepos:41511236
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