  Controlling anisotropy in nanostructures is a challenging but rewarding task
since confinement in one or more dimensions influences the physical and
chemical properties of the items decisively. In particular, semiconducting
nanostructures can be tailored to gain optimized properties to work as
transistors or absorber material in solar cells. We demonstrate that the shape
of colloidal lead sulfide nanostructures can be tuned from spheres to stripes
to sheets by means of the precursor concentrations, the concentration of a
chloroalkane co-ligand and the synthesis temperature. All final structures
still possess at least one dimension in confinement. Electrical transport
measurements complement the findings.
