The self-generated hydrodynamic and chemical fields, which induce particle motion, probe and are modified by that very environment, including confining hard walls. These changes couple back to the particle motion via the phoretic slip on the particle surface and lead to the emergence of "wall-bounded" steady-states such as sliding and hovering. Furthermore, it has been shown that the occurrence of such states is a robust feature, with respect to various models of chemical activity, of the dynamics of such particles near walls.
[ W.E. Uspal, M.N. Popescu, S. Dietrich, and M. Tasinkevych, Self- propulsion of a catalytically active particle near a planar wall: from reflection to sliding and hovering, Soft Matter 11, 434 (2015) ]
[P. Bayati, M.N. Popescu, W.E. Uspal, S. Dietrich, and A. Najafi, Dynamics near planar walls for various model self-phoretic particles, Soft Matter 15, 5644 (2019)]