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Following nanoparticles in complex turbid media

机译：在复杂的混浊介质中纳米颗粒之后

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Diffusing wave spectroscopy (DWS) was used to determine the size and volume fraction of nanoparticles (NP) within a foam taken as an example of a turbid media. The presence of two types of scatterers – dispersed NPs and liquid/gas interfaces – leads to two-fold dynamics in the system. Two characteristic decays of the temporal autocorrelation function are observed, their position and amplitude are dependent on particle concentration and foam age. Since only those NPs which are performing Brownian motion decorrelate the signal, one can follow the dynamics of particles' trapping into the foam matrix during the evolution of the system. This technique is a direct and noninvasive way to detect NPs in turbid media. The detection limit strongly depends on the NP nature and an algorithm for its estimation is provided.
机译：扩散波谱（DWS）用于确定作为浑浊介质的实例的泡沫内纳米颗粒（NP）的尺寸和体积分数。存在两种类型的散射仪 - 分散的NPS和液体/气体界面 - 导致系统中的两倍动态。观察到时间自相关函数的两个特征衰减，它们的位置和幅度取决于颗粒浓度和泡沫年龄。由于仅执行布朗运动去相关信号的NPS，因此在系统的演变期间可以遵循粒子捕获到泡沫基质中​​的动态。该技术是一种直接和非侵入性的方法来检测浑浊介质中的NP。检测极限强烈取决于NP性质和提供其估计的算法。

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