Parallel Molecular Dynamics simulations are conducted for describing growth on
surfaces with different kind of roughness: a perfect ordered crystalline flat
graphite surface, a disordered rough graphite surface and flat surface with
an ordered localized defect. It is shown that disordered
rough surfaces results in a first step to reduction of the sticking coefficient,
increased cluster density, size reduction. Structure of the clusters shows
the disappearance of the octahedral site characteristic of compact structure.
Isolated defect induces cluster-cluster interactions that modify
growth compared to perfect flat surface. Kinetic study of growth shows power law
evolution for low impinging atom kinetic energy. Increasing kinetic energy,
on all kinds of surfaces, results in a slightly larger exponent z, but fitting
by an exponential function is quite good too. Lattice expansion is favoured on
rough surfaces but increasing incoming atom kinetic energy weakens this effect.