OPTICAL MEASUREMENTS OF FREQUENCY-DEPENDENT LINEAR VISCOELASTIC MODULI OF COMPLEX FLUIDS
OPTICAL MEASUREMENTS OF FREQUENCY-DEPENDENT LINEAR VISCOELASTIC MODULI OF COMPLEX FLUIDS
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DOI：
10.1103/physrevlett.74.1250
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发表时间：
1995-02-13
影响因子：
8.6
通讯作者：
WEITZ, DA
中科院分区：
文献类型：
--
作者：
MASON, TG;WEITZ, DA
提出了一种利用动态光散射测量复杂流体线粘弹模量的新方法。一个广义朗之万方程被用来与一个探针粒子的均方位移的散装复杂流体的存储和损耗模量。我们证实了这种技术的实验有效性，通过比较光散射结果与机械测量几个复杂的流体。这种方法探测了在很大程度上扩展的频率范围内的模量，并提供了重要的新的洞察复杂流体的弹性敏感性。
We present a novel experimental method to measure linear viscoelastic moduli of complex fluids using dynamic light scattering. A generalized Langevin equation is used to relate the mean square displacement of a probe particle to the storage and loss moduli of the bulk complex fluid. We confirm the experimental validity of this technique by comparing the light scattering results with mechanical measurements for several complex fluids. This method probes the moduli over a greatly extended frequency range and provides significant new insight into the elastic susceptibility of complex fluids.