Transient dynamics of a colloidal particle driven through a viscoelastic fluid

Abstract

We experimentally study the transient motion of a colloidal particle actively dragged by an optical trap through different viscoelastic fluids (wormlike micelles, polymer solutions, and entangled $\lambda$-phage DNA). We observe that, after sudden removal of the moving trap, the particle recoils due to the recovery of the deformed fluid microstructure. We find that the transient dynamics of the particle proceeds via a double exponential relaxation, whose relaxation times remain independent of the initial particle velocity whereas their amplitudes strongly depend on it. While the fastest relaxation mirrors the viscous damping of the particle by the solvent, the slow relaxation results from the recovery of the strained viscoelastic matrix. We show that this transient information, which has no counterpart in Newtonian fluids, can be exploited to investigate linear and nonlinear rheological properties of the embedding fluid, thus providing a novel method to perform transient rheology at the micron-scale.

19 pages, 7 Figures, submitted to New Journal of Physics

References in corpus (8)

• Flagellated bacterial motility in polymer solutions
• Flagellar Kinematics and Swimming of Algal Cells in Viscoelastic Fluids
• Transient dynamics of a colloidal particle driven through a viscoelastic fluid
• The fluctuation-dissipation relation: how does one compare correlation functions and responses?
• Probing linear and nonlinear microrheology of viscoelastic fluids
• Microscopic Origin of Shear Relaxation in Strongly Coupled Yukawa Liquids
• Generalized Langevin Equation with Hydrodynamic Backflow: Equilibrium Properties
• Out-of-equilibrium microrheology using optical tweezers to probe directional viscoelastic properties under shear

Cited by in corpus (33)

• Dynamics of self-propelled Janus particles in viscoelastic fluids
• Memory-induced transition from a persistent random walk to circular motion for achiral microswimmers
• Oscillating Modes of Driven Colloids in Overdamped Systems
• Tuning the motility and directionality of self-propelled colloids
• Transient dynamics of a colloidal particle driven through a viscoelastic fluid
• Generalized Ornstein-Uhlenbeck Model for Active Motion
• Interacting Brownian dynamics in a nonequilibrium particle bath
• Fluid viscoelasticity triggers fast transitions of a Brownian particle in a double well optical potential
• Ductile-to-brittle transition and yielding in soft amorphous materials: perspectives and open questions
• Active particles in geometrically confined viscoelastic fluids
• Barrier crossing in a viscoelastic bath
• The modified Langevin description for probes in a nonlinear medium
• Properties of a nonlinear bath: Experiments, theory, and a stochastic Prandtl-Tomlinson model
• Driven probe under harmonic confinement in a colloidal bath
• Two step micro-rheological behavior in a viscoelastic fluid
• Recoil experiments determine the eigenmodes of viscoelastic fluids
• How are mobility and friction related in viscoelastic fluids?
• Dynamics of a colloidal particle coupled to a Gaussian field: from a confinement-dependent to a non-linear memory
• Work extraction and performance of colloidal heat engines in viscoelastic baths
• Memory-induced oscillations of a driven particle in a dissipative correlated medium
• Enhanced directionality of active processes in a viscoelastic bath
• Deforming Active Droplets in Viscoelastic Media
• Stochastic energetics of a colloidal particle trapped in a viscoelastic bath
• The rise and fall of branching: a slowing down mechanism in relaxing wormlike micellar networks
• Non-Gaussian fluctuations of a probe coupled to a Gaussian field
• Aging of living polymer networks: a model with patchy particles
• Discontinuous Thinning in Active Microrheology of Soft Complex Matter
• A mesoscale study of creep in a microgel using the acoustic radiation force
• Memory-induced alignment of colloidal dumbbells
• Jerky chiral active particles
• Recoil of a driven tracer in a correlated medium
• Minimal dissipation with viscoelastic baths in weakly driven processes
• Fluctuations of driven probes reveal nonequilibrium transitions in complex fluids