TY - JOUR
T1 - Viscoelastic response of a complex fluid at intermediate distances
AU - Sonn-Segev, Adar
AU - Bernheim-Groswasser, Anne
AU - Diamant, Haim
AU - Roichman, Yael
PY - 2014/2/25
Y1 - 2014/2/25
N2 - The viscoelastic response of complex fluids is length- and time-scale dependent, encoding information on intrinsic dynamic correlations and mesoscopic structure. We study the length scale above which bulk viscoelasticity sets in, and the material response that precedes it at shorter distances. We show that the crossover between these two regimes may appear at a surprisingly large distance. We generalize the framework of microrheology to include both regimes and apply it to F-actin networks, thereby extracting their dynamic correlation length from their bulk and local viscoelastic properties.
AB - The viscoelastic response of complex fluids is length- and time-scale dependent, encoding information on intrinsic dynamic correlations and mesoscopic structure. We study the length scale above which bulk viscoelasticity sets in, and the material response that precedes it at shorter distances. We show that the crossover between these two regimes may appear at a surprisingly large distance. We generalize the framework of microrheology to include both regimes and apply it to F-actin networks, thereby extracting their dynamic correlation length from their bulk and local viscoelastic properties.
UR - http://www.scopus.com/inward/record.url?scp=84894676977&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.112.088301
DO - 10.1103/PhysRevLett.112.088301
M3 - Article
AN - SCOPUS:84894676977
SN - 0031-9007
VL - 112
JO - Physical Review Letters
JF - Physical Review Letters
IS - 8
M1 - 088301
ER -