Microrheology of Entangled F-Actin Solutions | Zendy

M. L. Gardel | Zendy; Megan T. Valentine | Zendy; John C. Crocker | Zendy; Andreas R. Bausch | Zendy; David A. Weitz | Zendy

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Microrheology of Entangled F-Actin Solutions

Author(s) -

M. L. Gardel,

Megan T. Valentine,

John C. Crocker,

Andreas R. Bausch,

David A. Weitz

Publication year - 2003

Publication title -

physical review letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.688

H-Index - 673

eISSN - 1079-7114

pISSN - 0031-9007

DOI - 10.1103/physrevlett.91.158302

Subject(s) - microrheology , physics , protein filament , viscoelasticity , elastic modulus , elasticity (physics) , materials science , thermodynamics , composite material

We measure the viscoelasticity of entangled F-actin over length scales between 1 and 100 microm 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.

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