Two-bead microrheology: modeling protocols.
Two-bead microrheology: modeling protocols.
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二珠微流变学：建模协议。
DOI：
10.1103/physreve.78.031501
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
Forest,MGregory
中科院分区：
文献类型：
--
作者：
Hohenegger,Christel;Forest,MGregory
微珠流变学将浸入软物质中的珠的波动映射到周围介质的粘弹性。在本文中，我们提出了建模扩展的开创性成果梅森和韦茨[物理。74，1250（1995）]和Crocker [Phys. Rev. Lett. 85，888（2000）]和Levine和Lubensky [Phys. Rev. Lett. 85，1774（2000）]。我们制定了两个珠子的线性响应分析，使模型方程保留了每个珠子的局部扩散特性（通过每个珠子周围的壳或耗尽区的记忆内核）和分离珠子的介质的非局部动态模量（通过记忆内核，将一个珠子的波动传输到另一个）。然后，我们推导出可逆系统的方程：一个孤立的珠子的自相关性，两个耦合珠的自相关性和互相关;和壳半径周围的每个珠子，记忆内核的壳，和两个珠子之间的介质。
Microbead rheology maps the fluctuations of beads immersed in soft matter to viscoelastic properties of the surrounding medium. In this paper, we present modeling extensions of the seminal results of Mason and Weitz [Phys. Rev. Lett. 74, 1250 (1995)] for a single bead and of Crocker [Phys. Rev. Lett. 85, 888 (2000)] and Levine and Lubensky [Phys. Rev. Lett. 85, 1774 (2000)] for two beads. We formulate the linear response analysis for two beads so that the model equations retain the local diffusive properties of each bead (through the memory kernel of the shell or depletion zone surrounding each bead) and the nonlocal dynamic moduli of the medium separating the beads (through the memory kernel that transmits fluctuations of one bead to the other). We then derive ainvertible system of equations relating: an isolated bead’s autocorrelations, the autocorrelations and cross-correlations of two coupled beads; and the shell radius surrounding each bead, the memory kernels of the shell, and of the medium between the two beads.