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 …

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 …

Differently from passive Brownian particles, active particles, also known as self-propelled
Brownian particles or microswimmers and nanoswimmers, are capable of taking up energy …

Biological microorganisms swim with flagella and cilia that execute nonreciprocal motions
for low Reynolds number (Re) propulsion in viscous fluids. This symmetry requirement is a …

In the body, mucus provides an important defense mechanism by limiting the penetration of
pathogens. It is therefore also a major obstacle for the efficient delivery of particle-based …

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

It is widely believed that the swimming speed, v, of many flagellated bacteria is a
nonmonotonic function of the concentration, c, of high-molecular-weight linear polymers in …

A computational model of finite-length undulatory swimmers is used to examine the physical
origin of the effect of elasticity on swimming speed. We explore two distinct target swimming …

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

Many micro-organisms find themselves immersed in fluids displaying non-Newtonian
rheological properties such as viscoelasticity and shear-thinning viscosity. The effects of …