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Formation and Size Control of Silver Nanoparticles by Laser Ablation in Aqueous Solution

2000; American Chemical Society; Volume: 104; Issue: 39 Linguagem: Inglês

10.1021/jp001336y

1520-6106

Fumitaka Mafuné, Jun‐ya Kohno, Yoshihiro Takeda, Tamotsu Kondow, Hisahiro Sawabe,

Gold and Silver Nanoparticles Synthesis and Applications

Silver nanoparticles were produced by laser ablation of a metal silver plate in an aqueous solution of sodium dodecyl sulfate, C12H25OSO3Na. The absorption spectrum of the silver nanoparticles is found to be essentially the same as that of silver nanoparticles chemically prepared in a solution. The size distribution of the nanoparticles measured by an electron microscope shifts to a smaller size with increase in the concentration of sodium dodecyl sulfate and with a decrease in the irradiation laser power. These findings are explained by a scheme that the nanoparticles are formed via rapid formation of an embryonic silver particle and a consecutive slow particle growth in competition with termination of the growth due to SDS coating on the particle.