Self-motile colloidal particles: from directed propulsion to random walk.
Phys Rev Lett 99:4 (2007) 048102
Abstract:
The motion of an artificial microscale swimmer that uses a chemical reaction catalyzed on its own surface to achieve autonomous propulsion is fully characterized experimentally. It is shown that at short times it has a substantial component of directed motion, with a velocity that depends on the concentration of fuel molecules. At longer times, the motion reverts to a random walk with a substantially enhanced diffusion coefficient. Our results suggest strategies for designing artificial chemotactic systems.Lattice Boltzmann simulations of spontaneous flow in active liquid crystals: the role of boundary conditions
(2007)
Density of quasiparticle states for a two-dimensional disordered system: Metallic, insulating, and critical behavior in the class D thermal quantum Hall effect
(2007)