Autonomously Probing Viscoelasticity in Disordered Suspensions

Abstract

Recent experiments show a strong rotational-diffusion enhancement for self-propelled microrheological probes in colloidal glasses. Here, we provide microscopic understanding using simulations with a frictional probe-medium coupling that converts active translation into rotation. Diffusive enhancement emerges from the medium's disordered structure and peaks at a second-order transition in the number of contacts. Our results reproduce the salient features of the colloidal glass experiment and support an effective description that is applicable to a broader class of viscoelastic suspensions.

5 pages, 4 figures

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Cited by in corpus (10)

• Active Rheology in Odd Viscosity Systems
• Glassy Dynamics in Chiral Fluids
• Cage Length Controls the Non-Monotonic Dynamics of Active Glassy Matter
• Dynamics of self-propelled tracer particles inside a polymer network
• Autonomously Probing Viscoelasticity in Disordered Suspensions
• Transport of a self-propelled tracer through a hairy cylindrical channel: interplay of stickiness and activity
• Spontaneous chiralization of polar active colloids
• Are strongly confined colloids good models for two dimensional liquids?
• Active Rheology and Anti-Commensuration Effects For Driven Probe Particles on Two Dimensional Periodic Pinning Substrates
• Stretched exponential to power-law: crossover of relaxation in a kinetically constrained model