Bacterial swarming is a collective mode of motion in which cells migrate rapidly over
surfaces, forming dynamic patterns of whirls and jets. This review presents a physical point …

An active fluid denotes a viscous suspension of particles, cells, or macromolecules able to
convert chemical energy into mechanical work by generating stresses on the microscale. By …

Chemically active colloids locally change the chemical composition of their solvent via
catalytic reactions which occur on parts of their surface. They achieve motility by converting …

We formulate the theory for steering an active particle with optimal travel time between two
locations and apply it to the Mexican hat potential without brim. For small heights the particle …

Bacterial biofilms correspond to surface-associated bacterial communities embedded in
hydrogel-like matrix, in which high cell density, reduced diffusion and physico-chemical …

To celebrate the tenth anniversary of InterPore, we present an interdisciplinary review of
colloid transport through porous media. This review aims to explore both classical colloid …

Microswimmers move autonomously but are subject to external fields, which influence their
swimming path and their collective dynamics. With three concrete examples we illustrate …

Active particles, which interact hydrodynamically, display a remarkable variety of emergent
collective phenomena. We use squirmers to model spherical microswimmers and explore …

We present a hydrodynamic study of a monolayer of squirmer model microswimmers
confined to a boundary by strong gravity using the simulation method of multi-particle …

Heterogeneous systems of active matter exhibit a range of complex emergent dynamical
patterns. In particular, it is difficult to predict the properties of the mixed system based on its …