Active microrheology in corrugated channels: comparison of thermal and colloidal baths

  title={Active microrheology in corrugated channels: comparison of thermal and colloidal baths},
  author={Paolo Malgaretti and Antonio Manuel Puertas and Ignacio Pagonabarraga},
  journal={Journal of Colloid and Interface Science},
2 Citations

Brownian particles driven by spatially periodic noise

Abstract We discuss the dynamics of a Brownian particle under the influence of a spatially periodic noise strength in one dimension using analytical theory and computer simulations. In the absence of



Entropic electrokinetics: recirculation, particle separation, and negative mobility.

We show that when particles are suspended in an electrolyte confined between corrugated charged surfaces, electrokinetic flows lead to a new set of phenomena such as particle separation, mixing for

Active microrheology in a colloidal glass.

This nonequilibrium and anisotropic problem is investigated using a new implementation of the mode-coupling approximation with multiple relaxation channels and Langevin dynamics simulations, finding a force threshold below which the probe remains localized, while above it the probe acquires a finite velocity.

Driving an electrolyte through a corrugated nanopore.

It is shown here that the linear transport coefficients are particularly sensitive to the geometry and the conductive properties of the channel walls when the Debye length is comparable to the channel width.

Active and Passive Microrheology: Theory and Simulation

Microrheological study of complex fluids traces its roots to the work of the botanist Robert Brown in the early nineteenth century. Indeed, passive microrheology and Brownian motion are one and the

Active and nonlinear microrheology in dense colloidal suspensions.

A first-principles theory is presented for the active nonlinear microrheology of colloidal model system; for a constant external force on a spherical probe particle embedded in a dense host dispersion, an exact expression for the friction is derived.

Small-world rheology: an introduction to probe-based active microrheology.

  • L. WilsonW. Poon
  • Materials Science
    Physical chemistry chemical physics : PCCP
  • 2011
Active, probe-based microrheological techniques for measuring the flow and deformation of complex fluids are introduced and recent results are reviewed, paying particular attention to comparing and contrasting rheological parameters obtained from micro- and macro-rheological Techniques.

Microrheology: a review of the method and applications.

This paper provides a short introductory review of these methods of performing rheology, comparing them to conventional rheometry, and highlighting the major advantages.

Antiresonant driven systems for particle manipulation.

The presence of resonance-antiresonance pairs found can be exploited to design protocols able to engineer optimal transport processes and to manipulate the dynamics of nano-objects.

Two-dimensional to three-dimensional transition in soap films demonstrated by microrheology.

Unphysical values of the surface viscosity are found for thick soap films (h/d>7+/-3), indicating a transition from 2D to 3D behavior.

Non-monotonous polymer translocation time across corrugated channels: comparison between Fick-Jacobs approximation and numerical simulations

We study the translocation of polymers across varying-section channels. Using systematic approximations, we derive a simplified model that reduces the problem of polymer translocation through