Roman G Parkhomenko
CIC NanoGUNE, Spain
Title: Gold nanorods polystyrenesulphonate nanoparticles as a platform for spasers creation
Biography
Biography: Roman G Parkhomenko
Abstract
Despite numerous articles published every year on gold nanoparticles (GNP) they are still of tremendous interest due to their unique optical, catalytic, electronics properties, etc. The most recent application of gold nanoparticles is their utilization as a resonator in plasmonic nanolasers (spasers) in which GNP are surrounded by a thin layer of an active medium whose emission band overlaps with the spectrum of localized surface plasmons of the metal nanoparticle. Nowadays, the colloid spasers have been created in the form of core-shell structures in which the molecules of an active medium are placed into the mesoporous silica shell surrounding the gold core. Thus, the amount of the dye involved in the generation, and consequently the intensity of generation, is limited to the pore capacity of the silica shell. In this regard yolk-shell particles, due to the large free volume available, are considered to be an outstanding candidate for the spaser creation. Besides, the particles of such an architecture have been used as nanoreactors or biological probes for cancer detection. Here we present a novel method of producing hollow nanoparticles composed of gold nanorods core surrounded with a polymeric shell of polystyrene sulphonate. The proposed approach consists in covering the gold nanorods with silica followed by its slow hydrolysis in an aqueous media with the presence of the polymer. We showed that such particles can be filled with different organic dyes and can be used in spaser applications.