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Incoherent dynamic light scattering by dilute dispersions of spherical particles: wavelength-dependent dynamics

机译:球形粒子稀释分散体的不连贯的动态光散射:波长依赖性动力学

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摘要

Dynamic light scattering (DLS) was performed on dilute suspensions of colloidal particles, where the scattering intensity was minimised by ellipsometric optics as in ellipsometric light scattering. Measurements at minimum intensity settings are dominated by the incoherent scattering properties, i.e. the deviations from the average scattering properties. The observed relaxation dynamics does not vary with the scattering angle, but depends on the wavelength λ of the employed light. Therefore, the process has a /-dependence beyond the dependence included in the scattering vector. Such incoherent ellipsometric DLS could be applied to determine the residence time of particles in volumes with an extension comparable to λ, and to obtain detailed information on the dynamics of complex systems which is usually hidden by the dominating diffusive process.
机译:在胶体颗粒的稀释悬浮液上进行动态光散射(DLS),其中通过椭圆光学电池如椭圆形光散射最小化散射强度。 最小强度设置的测量由非相干散射特性主导,即与平均散射特性的偏差。 观察到的弛豫动态不随散射角度而变化,但取决于所用光的波长λ。 因此,该过程具有超出包括在散射载体中的依赖性的/彼依赖性。 这种非相干椭圆测量DL可以应用于以与λ相当的延伸的延伸的块中的粒子中的粒子的停留时间,并获得关于通常被主导扩散过程隐藏的复杂系统的动态的详细信息。

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