412 citations · 936 across the 8 of their papers we have counts for
7 papers
Axisymmetric spheroidal squirmers and self-diffusiophoretic particles
Ruben Poehnl, Mihail N. Popescu, William E. Uspal
We study, by means of an exact analytical solution, the motion of a spheroidal, axisymmetric squirmer in an unbounded fluid, as well as the low Reynolds number hydrodynamic flow as…
Shape-dependent guidance of active Janus particles by chemically patterned surfaces
W. E. Uspal, M. N. Popescu, M. Tasinkevych +1
Self-phoretic Janus particles move by inducing -- via non-equilibrium chemical reactions occurring on their surfaces -- changes in the chemical composition of the solution in which…
Chemically active colloids near osmotic-responsive walls with surface-chemistry gradients
M. N. Popescu, W. E. Uspal, S. Dietrich
Chemically active colloids move by creating gradients in the composition of the surrounding solution and by exploiting the differences in their interactions with the various molecu…
Active colloids in the context of chemical kinetics
G. Oshanin, M. N. Popescu, S. Dietrich
We study a mesoscopic model of a chemically active colloidal particle which on certain parts of its surface promotes chemical reactions in the surrounding solution. For reasons of…
Guiding catalytically active particles with chemically patterned surfaces
W. E. Uspal, M. N. Popescu, S. Dietrich +1
Catalytically active Janus particles suspended in solution create gradients in the chemical composition of the solution along their surfaces, as well as along any nearby container…
Topographical pathways guide chemical microswimmers
Juliane Simmchen, Jaideep Katuri, William E. Uspal +3
Achieving control over the directionality of active colloids is essential for their use in practical applications such as cargo carriers in microfluidic devices. So far, guidance o…
Self-propulsion of a catalytically active particle near a planar wall: from reflection to sliding and hovering
W. E. Uspal, M. N. Popescu, S. Dietrich +1
Micron-sized particles moving through solution in response to self-generated chemical gradients serve as model systems for studying active matter. Their far-reaching potential appl…