In microrheology, the local and bulk mechanical properties of a complex fluid are extracted
from the motion of probe particles embedded within it. In passive microrheology, particles …

There is a variety of situations in which Newton's third law is violated. Generally, the action-
reaction symmetry can be broken for mesoscopic particles, when their effective interactions …

We introduce active, probe-based microrheological techniques for measuring the flow and
deformation of complex fluids. These techniques are ideal for mechanical characterization …

There is a variety of cases in nature when the action–reaction symmetry is broken. In
particular, suitable conditions for this are realized in colloidal suspensions and complex …

In passive microrheology, the linear viscoelastic properties of complex fluids are inferred
from the Brownian motion of colloidal tracer particles. Active (but gentle) forcing may also be …

Active colloids in a bath of inert particles of smaller size cause anisotropic depletion. The
active hydrodynamics of this nonequilibrium phenomenon, which is fundamentally different …

Because active particles break time-reversal symmetry, an active fluid can sustain currents
even without an external drive. We show that when a passive body is placed in a fluid of …

A particle driven by an external force in a molecular crowding environment—a quiescent
bath of other particles, makes their spatial distribution inhomogeneous: the bath particles …

We consider the flocking of self-propelling agents in two dimensions, each of which
communicates with its neighbors within a limited vision-cone. Also, the communication …

The reciprocity of effective interparticle forces can be violated in various open and
nonequilibrium systems, in particular, in colloidal suspensions and complex (dusty) …