Synthesis of highly concentrated silver nanoparticles

摘要

Two new preparation routes for the synthesis of highly concentrated Silver nanoparticles are presented here first, Silver nanoparticles were successfully synthesized in mild conditions using a high loading of silver acetate and water-soluble polymers as Poly-(vinylpyrolidone) PVP, which was found here to act as both reducing and protecting agent. At the end of the reaction, after supernatant removal, highly concentrated silver nanoparticles (up to 40wt%) are obtained and characterized by TEM where 3-50 run spherical silver nanoparticles can be observed. The second preparation route reported concerns the synthesis of highly concentrated silver nanoparticles (30wt%) in presence of polyethylene glycol and tert-butanol in mild conditions, The as-collected silver pastes were characterised by TEM and revealed spherical silver nanoparticles with 50nm particle sizes.