One-step synthesis of gold and silver hydrosols using poly(N-vinyl-2-pyrrolidone) as a reducing agent

摘要: Synthesis of gold and silver hydrosols was carried out in a one-step process by reduction aqueous solutions metal salts using poly(N-vinyl-2-pyrrolidone) (PVP). Both kinds nanoparticles were obtained without the addition any other reducing agent, at low temperatures water as synthesis solvent. Shape, size, optical properties particles could be tuned changing employed PVP/metal salt ratio. It is proposed that PVP acts agent suffering partial degradation during synthesis. Two possible mechanisms are to explain step: direct hydrogen abstraction induced ion and/or action macroradicals formed polymer. Initial formation might associated with metal-accelerated decomposition amounts peroxides present commercial