Date of this Version
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.
Gardel, M. L., Valentine, M. T., Crocker, J. C., Bausch, A. R., & Weitz, D. A. (2003). Microrheology of Entangled F-Actin Solutions. Retrieved from http://repository.upenn.edu/cbe_papers/30
Date Posted: 20 December 2005
This document has been peer reviewed.