Anomalous Dynamics of Colloids and Their Cluster Formation in Active Liquids

Abstract

We examine the dynamics of individual colloidal particles in active media. Unlike Brownian particles, which display a Gaussian distribution in displacement, the colloids in active media show deviations from this form. These deviations depend on the size of the colloidal particles. We have characterized these deviations and interpreted the results using the concept of superstatistics. In addition, we also analyse the dynamic clustering of colloids at intermediated densities in the steady state using aggregation and fragmentation models, by constructing a transition matrix and applying a monomer approximation.