Sun, 06 Jul 2008 11:07:25 BST CiteULike: dchens Frey http://www.citeulike.org/user/dchen/author/Frey CiteULike.org en-gb Copyright © 2004-2008 citeulike.org http://www.citeulike.org/user/dchen/article/2264824 <i>Physical Review Letters, Vol. 96, No. 11. (2006)</i><br /><br />We exploit the power of microrheology to measure the viscoelasticity of entangled F-actin solutions at different length scales from 1 to 100 µm 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. Microrheology Probes Length Scale Dependent Rheology J Liu ML Gardel K Kroy E Frey BD Hoffman JC Crocker AR Bausch DA Weitz doi:10.1103/PhysRevLett.96.118104 Physical Review Letters, Vol. 96, No. 11. (2006) 2008-01-20T23:36:22-00:00 2006 Physical Review Letters 96 11 APS polymer semiflexiable weitz