Tuning Higher Order Structure in Colloidal Fluids
arXiv (Cornell University)(2023)
摘要
Colloidal particles self assemble into a wide range of structures under AC electric fields due to induced dipolar interactions [Yethiraj and Van Blaaderen Nature 421 513 (2003)]. Tuning the external field drives structural transitions in the system. Here we consider colloidal fluids comprised of such dipolar particles in experiment and simulation and investigate their 2-body and higher-order structure using a variety of probes. The higher--order structure we probe using three-body spatial correlation functions and a many--body approach based on minimum energy clusters of a related system. These clusters exhibit a cascade of geometric transitions upon increasing the strength of the dipolar interaction, which are echoed in the higher--order structure of the concentrated fluids we study here.
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关键词
higher order structure,fluids
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