Microrheology probes length scale dependent rheology
Microrheology probes length scale dependent rheology
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DOI：
10.1103/physrevlett.96.118104
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发表时间：
2006-03-24
影响因子：
8.6
通讯作者：
Weitz, DA
中科院分区：
文献类型：
--
作者：
Liu, J;Gardel, ML;Weitz, DA
我们利用微观流变学的力量，在很宽的频率范围内测量了从1到100微米不同长度尺度上缠绕的F-肌动蛋白溶液的粘弹性。我们将单探针粒子的运动行为与两个粒子的相关运动行为进行了比较。通过改变细丝的平均长度，我们确定了在细丝长度上扩散的波动。这为0.1-30rad/s的弹性提供了一个重要的松弛机制。
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.