  We report here an original single-step process for synthesis and
self-organization of gold colloids by simply incorporating gold salts into a
solution prepared with Polystyrene (PS) - Polymethylmethacrylate (PMMA)
copolymer, thiolated PS and Propylene Glycol Methyl Ether Acetate (PGMEA) as
solvent. The spin-coating and annealing of this solution allows then the
formation of PS domains. Depending on the polymer concentration of the
as-prepared solution, there can be either one or several gold nanoparticles
(NPs) per PS domains. For high concentration of gold nanoparticles in PS
domains, the coupling between plasmonic nanoparticles leads to the observation
of second peak in the optical extinction spectrum. Such collective effect could
be relevant for the development of optical strain sensors in the next future.
