Xu Yixuan, Scheffold Frank, Mason Thomas G
Department of Materials Science and Engineering, University of California, Los Angeles, California 90095, USA.
Department of Physics, University of Fribourg, 1700 Fribourg, Switzerland.
Phys Rev E. 2020 Dec;102(6-1):062610. doi: 10.1103/PhysRevE.102.062610.
We advance the microrheological interpretation of optical diffusing wave spectroscopy (DWS) measurements of strongly attractive emulsions at dense droplet volume fractions, ϕ. Beyond accounting for collective scattering, we show that measuring the mean free path of optical transport over a wide range of ϕ is necessary to quantify the effective size of the DWS probes, which we infer to be local dense clusters of droplets through a decorated core-shell network model. This approach yields microrheological elastic shear moduli that are in quantitative agreement with mechanical rheometry.
我们推进了对强吸引性乳液在高密度液滴体积分数ϕ下的光学扩散波光谱（DWS）测量的微观流变学解释。除了考虑集体散射外，我们表明，在很宽的ϕ范围内测量光传输的平均自由程对于量化DWS探针的有效尺寸是必要的，通过一个修饰的核壳网络模型，我们推断该探针为局部密集的液滴簇。这种方法产生的微观流变学弹性剪切模量与机械流变测量在定量上是一致的。
