99 citations · 158 across the 5 of their papers we have counts for
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Floor- or ceiling-sliding for chemically active, gyrotactic, sedimenting Janus particles
Sayan Das, Zohreh Jalilvand, Mihail N. Popescu +3
Surface bound catalytic chemical reactions self-propel chemically active Janus particles. In the vicinity of boundaries, these particles exhibit rich behavior, such as the occurren…
Theory of light-activated catalytic Janus particles
W. E. Uspal
We study the dynamics of active Janus particles that self-propel in solution by light-activated catalytic decomposition of chemical "fuel." We develop an analytical model of a phot…
Effective squirmer models for self-phoretic chemically active spherical colloids
M. N. Popescu, W. E. Uspal, Z. Eskandari +2
Various aspects of self-motility of chemically active colloids in Newtonian fluids can be captured by simple models for their chemical activity plus a phoretic slip hydrodynamic bo…
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…
Calculating the motion of highly confined, arbitrary-shaped particles in Hele-Shaw channels
Bram Bet, Rumen Georgiev, William Uspal +3
We combine theory, numerical calculations, and experiments to accurately predict the motion of anisotropic particles in shallow microfluidic channels, in which the particles are st…
Cross-stream migration of active particles
Jaideep Katuri, William E. Uspal, Juliane Simmchen +2
For natural microswimmers, the interplay of swimming activity and external flow can promote robust motion, e.g. propulsion against ("upstream rheotaxis") or perpendicular to the di…