  Anisotropy at the level of the inter-particle interaction provides the
particles with specific instructions for the self-assembly of target
structures. The ability to synthesize non-spherical colloids, together with the
possibility of controlling the particle bonding pattern via suitably placed
interaction sites, is nowadays enlarging the playfield for materials design. We
consider a model of anisotropic colloidal platelets with regular rhombic shape
and two attractive sites placed along adjacent edges and we run Monte Carlo
simulations in two-dimensions to investigate the two-stage assembly of these
units into clusters with well-defined symmetries and, subsequently, into
extended lattices. Our focus is on how the site positioning and site-site
attraction strength can be tuned to obtain micellar aggregates that are robust
enough to successively undergo to a second-stage assembly from sparse clusters
into a stable hexagonal lattice.
