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Phys Rev Lett. 2006 Mar 24;96(11):118104. Epub 2006 Mar 23.

Microrheology probes length scale dependent rheology.

Author information

1
Dept. of Physics & DEAS, Harvard University, Cambridge, Massachusetts 02138, USA.

Abstract

We exploit the power of microrheology to measure the viscoelasticity of entangled F-actin solutions at different length scales from 1 to 100 microm over a wide frequency range. We compare the behavior of single probe-particle motion to that of the correlated motion of two particles. By varying the average length of the filaments, we identify fluctuations that dissipate diffusively over the filament length. These provide an important relaxation mechanism of the elasticity between 0.1 and 30 rad/sec.

PMID:
16605878
DOI:
10.1103/PhysRevLett.96.118104
[Indexed for MEDLINE]

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