  The behavior of colloidal particles with a hard core and a soft shell has
attracted the attention for researchers in the physical-chemistry interface not
only due the large number of applications, but due the unique properties of
these systems in bulk and at interfaces. The adsorption at the boundary of two
phases can provide information about the molecular arrangement. In this way, we
perform Langevin Dynamics simulations of polymer-grafted nanoparticles. We
employed a recently obtained core-softened potential to analyze the relation
between adsorption, structure and dynamic properties of the nanoparticles near
a solid repulsive surface. Two cases were considered: flat or structured walls.
At low temperatures, a maxima is observed in the adsorption. It is related to a
fluid to clusters transition and with a minima in the contact layer diffusion -
and is explained by the competition between the scales in the core-softened
interaction. Due the long range repulsion, the particles stay at the distance
correspondent to this length scale at low densities, and overcome the repulsive
barrier as the packing increases, However, increasing the temperature, the gain
in kinetic energy allows the colloids to overcome the long range repulsion
barrier even at low densities. As consequence, there is no competition and no
maxima was observed in the adsorption.
