Interfacial fluid rheology of soft particles
arXiv:2308.15933 · doi:10.1103/PhysRevLett.131.258202
Abstract
In situ interfacial rheology and numerical simulations are used to investigate microgel monolayers in a wide range of packing fractions, . The heterogeneous particle compressibility determines two flow regimes characterized by distinct master curves. To mimic the microgel architecture and reproduce experiments, an interaction potential combining a soft shoulder with the Hertzian model is introduced. In contrast to bulk conditions, the elastic moduli vary non-monotonically with at the interface, confirming long-sought predictions of reentrant behavior for Hertzian-like systems.
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