The results of a Monte Carlo simulation for adsorption from
solutions of monomers and dimers on
heterogeneous surfaces are presented. The adsorption and
orientation of dimers adsorbed on surfaces of
different (striplike and chessboard) topography are discussed. It
is demonstrated that the surface topography
has a considerable effect on the adsorption and orientation of dimers
only when the size of the homotatic
domains is smaller than the length of the adsorbed rodlike molecules.
For larger patches, the adsorption
does not depend strongly on the surface topography.