Microrheology of Entangled F-Actin Solutions

by: ML Gardel, MT Valentine, JC Crocker, AR Bausch, DA Weitz

Physical Review Letters, Vol. 91, No. 15. (2003)

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摘要

We measure the viscoelasticity of entangled F-actin over length scales between 1 and 100 µm using one- and two-particle microrheology, and directly identify two distinct microscopic contributions to the elasticity. Filament entanglements lead to a frequency-independent elastic modulus over an extended frequency range of 0.01–30 rad/sec; this is probed with one-particle microrheology. Longitudinal fluctuations of the filaments increase the elastic modulus between 0.1 and 30 rad/sec at length scales up to the filament persistence length; this is probed by two-particle microrheology.

@article{gardel03, abstract = {We measure the viscoelasticity of entangled F-actin over length scales between 1 and 100\ \ \ \µm using one- and two-particle microrheology, and directly identify two distinct microscopic contributions to the elasticity. Filament entanglements lead to a frequency-independent elastic modulus over an extended frequency range of 0.01\&\#150;30\ \ \ rad/sec; this is probed with one-particle microrheology. Longitudinal fluctuations of the filaments increase the elastic modulus between 0.1 and 30\ \ \ rad/sec at length scales up to the filament persistence length; this is probed by two-particle microrheology.}, author = {Gardel, M. L. and Valentine, M. T. and Crocker, J. C. and Bausch, A. R. and Weitz, D. A. }, citeulike-article-id = {822250}, doi = {http://dx.doi.org/10.1103/PhysRevLett.91.158302}, journal = {Physical Review Letters}, keywords = {biology, microrheology, polymer-gel}, number = {15}, posted-at = {2008-09-27 20:14:29}, priority = {2}, publisher = {APS}, title = {Microrheology of Entangled F-Actin Solutions}, url = {http://dx.doi.org/10.1103/PhysRevLett.91.158302}, volume = {91}, year = {2003} }

RIS record

TY - JOUR ID - gardel03 L3 - citeulike-article-id:822250 N2 - We measure the viscoelasticity of entangled F-actin over length scales between 1 and 100   µm using one- and two-particle microrheology, and directly identify two distinct microscopic contributions to the elasticity. Filament entanglements lead to a frequency-independent elastic modulus over an extended frequency range of 0.0130   rad/sec; this is probed with one-particle microrheology. Longitudinal fluctuations of the filaments increase the elastic modulus between 0.1 and 30   rad/sec at length scales up to the filament persistence length; this is probed by two-particle microrheology. IS - 15 JF - Physical Review Letters TI - Microrheology of Entangled F-Actin Solutions PB - APS VL - 91 KW - biology KW - microrheology KW - polymer-gel AU - Gardel, ML AU - Valentine, MT AU - Crocker, JC AU - Bausch, AR AU - Weitz, DA PY - 2003/// UR - http://dx.doi.org/10.1103/PhysRevLett.91.158302 ER -

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