As one increases the concentration of a colloidal suspension, the system exhibits a dramatic
increase in viscosity. Beyond a certain concentration, the system is said to be a colloidal …

We review the depinning and nonequilibrium phases of collectively interacting particle
systems driven over random or periodic substrates. This type of system is relevant to vortices …

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 …

Research on soft materials, including colloidal suspensions, glasses, pastes, emulsions,
foams, polymer networks, liquid crystals, granular materials, and cells, has captured the …

Measuring, characterizing, and modelling the slow dynamics of glassy soft matter is a great
challenge, with an impact that ranges from industrial applications to fundamental issues in …

In microrheology, elastic and viscous moduli are obtained from measurements of the
fluctuating thermal motion of embedded colloidal probes. In such experiments, the probe …

The simplicity of hard spheres as a model system is deceptive. Although the particles
interact solely through volume exclusion, that nevertheless suffices for a wealth of static and …

Microrheology was proposed almost twenty years ago as a technique to obtain rheological
properties in soft matter from the microscopic motion of colloidal tracers used as probes …

Understanding the mechanical properties of glasses is a great scientific challenge. A
powerful technique to study the material response on a microscopic scale is microrheology …

We present a first-principles theory for the active nonlinear microrheology of colloidal model
system; for a constant external force on a spherical probe particle embedded in a dense host …