Medical micro/nanorobots have received tremendous attention over the past decades owing
to their potential to be navigated into hard-to-reach tissues for a number of biomedical …

Active colloids are self-propelled particles moving in viscous fluids by consuming fuel from
their surroundings. Here, we review the numerical and theoretical modeling of active …

Miniature soft robots are mobile devices, which are made of smart materials that can be
actuated by external stimuli to realize their desired functionalities. Here, the key …

The locomotion of microorganisms and spermatozoa in complex viscoelastic fluids is of
critical importance in many biological processes such as fertilization, infection, and biofilm …

We review the literature on swimming in complex fluids. A classification is proposed by
comparing the length-and timescales of a swimmer with those of nearby obstacles …

The fluid dynamics of microswimmers has received attention from the fields of microbiology,
microrobotics, and active matter. Microorganisms have evolved organelles termed cilia for …

We experimentally investigate active motion of spherical Janus colloidal particles in a
viscoelastic fluid. Self-propulsion is achieved by a local concentration gradient of a critical …

Microswimmers in nature often experience spatial gradients of viscosity. In this Letter we
develop theoretical results for the dynamics of active particles, biological or otherwise …

Biological and artificial microswimmers often encounter fluid media with non-Newtonian
rheological properties. In particular, many biological fluids such as blood and mucus are …

We seek the best stroke sequences of a finite-size swimming predator chasing a non-motile
point or finite-size prey at low Reynolds number. We use optimal control to seek the globally …