It is possible to modulate the nanoscale morphology of “supramolecular” self-assemblies of small organic molecules by simply changing the nature of the light that triggers the self-assembly process itself, say researchers in France and Germany. Although this type of process is known to occur in metallic nanoparticles, this is the first time that it has been seen in organic materials….
http://nanotechweb.org/cws/article/tech/60600