Complex fluid-fluid interfaces play an important role in a variety of application domains, from
emulsion and foam stability, to thin films in biomedical applications, to coating flow …

New developments in the microrheology of complex fluids are considered. Firstly the
requirements for a simple modern particle tracking microrheology experiment are …

This work establishes that static contact angles for gallium-based liquid metals have no
utility despite the continued and common use of such angles in the literature. In the …

Fluid–fluid interfaces, laden with polymers, particles or other surface-active moieties, often
show a rheologically complex response to deformations, in particular when strong lateral …

We review recent work on active colloids at interfaces, including self-propelled colloids that
move by generating a propulsive force, and driven colloids that move under external fields …

Liquid–liquid emulsion systems are usually stabilized by additives, known as surfactants,
which can be observed in various environments and applications such as oily bilgewater …

We experimentally investigate the effect of particle size on the motion of passive polystyrene
spheres in suspensions of Escherichia coli. Using particles covering a range of sizes from …

Bacteria are often discussed as active colloids, self-propelled organisms whose collective
motion can be studied in the context of non-equilibrium statistical mechanics. In such …

Bacterial adsorption to interfaces is the initial step in biofilm formation. The mechanism of
biofilm formation at liquid-liquid interfaces differs from the process of biofilm formation on …

Bacteria are important examples of active or self-propelled colloids. Because of their
directed motion, they accumulate near interfaces. There, they can become trapped and swim …