Abstract
Gold nanoparticles with 10 nm average diameter were prepared in aqueous solutions of sodium dodecyl sulfate (SDS) at prescribed concentrations. A solution containing nanoparticles was irradiated with a focused pulse laser at 355 nm. The nanoparticles were either fragmented under irradiation into those with 2.5 nm average diameter or formed nano-scale networks, depending on the SDS concentration and the laser fluence. A structure diagram of the products after irradiation, constructed as functions of the concentration and the fluence, provided information on the mechanism of fragmentation and formation of nanonetworks.
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