  The ability to assemble mesoscopic colloidal lattices above a surface is
important for fundamental studies related with nucleation and crystallization,
but also for a variety of technological applications in photonics and
micro-engineering. Current techniques based on particle sedimentation above a
lithographic template are limited by a slow deposition process and by the use
of static templates, which make difficult to implement fast annealing
procedures. Here it is demonstrated a method to realize and anneal a series of
colloidal lattices displaying triangular, honeycomb or kagome-like symmetry
above a structure magnetic substrate. By using a binary mixture of particles,
superlattices can be realized increasing further the variety and complexity of
the colloidal patterns which can be produced.
