Lately I obtained silver thin films deposited by magetron sputtering on silicon vafers.
It was found that nanoislands formation is highly sensitive to annealing conditions.
Attempt of examination of importance of layer thickness revealed that inappropriate annealing leads to fingerlike irregular partilces formation.

Another method of fabrication of plasmonic structure is based on surface charge modification followed by nanoparticels adsorption. Silver Nanoparticles in colloidal solution has negative potential which helps to prevent the aggregation process. Modification is based on creation of negatively charged surface and adsorption of polyelectrolyte molecules to change charge into positive.

In my experiments I prepared glass substrate by immersion in NaOH solution followed by HCL and deionised water. Than PAH (polyallylamine hydrochloride)adsorption. On prepared surface I adsorped sub micron copper particles. On surface without preparation no particles was found, on surface specially prepared particles deposited with concentration depended on immersion time.