Confinement-induced enhancement of diffusiophoretic forces on self-propellers

Details Confinement-induced enhancement of diffusiophoretic forces on self-propellers Confinement-induced enhancement of diffusiophoretic forces on self-propellers

2007-09-14

arxiv.org/abs/0709.2256v1

Physics

Condensed Matter

Statistical Mechanics

6 pages, 2 figures, uses epl2.cls

Scientific paper

We study the effect of spatial confinement on the strength of propulsive diffusiophoretic forces acting on a particle that generates density gradients by exploiting the chemical free energy of its environment. Using a recently proposed simple model of a self-propelling device driven by chemical reactions taking place on some parts of its surface, we demonstrate that the force significantly increases in the presence of confining walls. We also show that such effects become even more pronounced in two-dimensional systems.

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