Microrheology probes length scale dependent rheology

被引：163

作者：

Liu, J ^{[1
]}

Gardel, ML

Kroy, K

Frey, E

Hoffman, BD

Crocker, JC

Bausch, AR

Weitz, DA

机构：

[1] Harvard Univ, Dept Phys & DEAS, Cambridge, MA 02138 USA

[2] Univ Leipzig, ITP, D-04103 Leipzig, Germany

[3] Univ Munich, Munich, Germany

[4] Univ Penn, Dept Chem Engn, Philadelphia, PA 19104 USA

[5] Tech Univ Munich, Phys Dept E22, D-85748 Garching, Germany

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.96.118104

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页数：4

共 22 条

[11]

JANMEY PA, 1986, J BIOL CHEM, V261, P8357

[12]

KROY K, 2000, SCATTERING POLYM COL

[13] Micro-bead mechanics with actin filaments [J].