| Chemically active micro-particles may serve as carriers in colloid-assembly or active-sensors applications. We study the diffusiophoresis of a spheroidal particle, which generates solute gradients in the surrounding unbounded solvent via catalytic reactions active on its surface. For catalyst decorations preserving the axial symmetry we derive analytically the phoretic velocity and its dependence on the aspect ratio of the particle and on the surface fraction contributing to the chemical reaction. Furthermore, we discuss the emergence of spinning motion for catalyst decorations breaking the axial symmetry. |
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