Microrheology probes length scale dependent rheology

Liu, J.; Gardel, M. L.; Kroy, K.; Frey, Erwin; Hoffman, B. D.; Crocker, J. C.; Bausch, A. R. and Weitz, D. A. (March 2006): Microrheology probes length scale dependent rheology. In: Physical Review Letters, Vol. 96, No. 11: pp. 118104-1

Abstract

We exploit the power of microrheology to measure the viscoelasticity of entangled F-actin solutions at different length scales from 1 to 100 mu m 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.

• Item Type: Journal article
• Form of publication: Publisher's Version
• Faculties: Physics
• Subjects: 500 Science > 530 Physics
• ISSN: 0031-9007
• Place of Publication: ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
• Language: English