Viscoelastic Response of a Complex Fluid at Intermediate Distances
Viscoelastic Response of a Complex Fluid at Intermediate Distances
复制标题
中等距离复杂流体的粘弹性响应
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
Y. Roichman
中科院分区：
文献类型：
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作者：
Adar Sonn;A. Bernheim;H. Diamant;Y. Roichman
复杂流体的粘弹性响应是长度和时间尺度相关的，编码信息的内在动力学相关性和介观结构。我们研究的长度尺度以上的体积粘弹性集，并在较短的距离之前，它的材料响应。我们表明，这两个政权之间的交叉可能会出现在一个令人惊讶的大距离。我们概括的微观流变学的框架，包括这两个制度，并将其应用到F-肌动蛋白网络，从而提取其动态相关长度从他们的体积和局部粘弹性。
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.