| Abstract
| - Silver nanoparticles were produced by laser ablation of a metal silver plate in aqueous solutions of surfactants,CnH2n+1SO4Na (n = 8, 10, 12, 16). The nanoparticles thus produced were characterized by electron microscopyand UV−visible absorption spectroscopy. The abundances of the nanoparticles before and after centrifugationwere measured as a function of the surfactant concentration. The concentration dependence of the abundanceimplies that the surfactant coverage and the charge state on the nanoparticle surface are closely related to thestability of the nanoparticles in the solutions. The nanoparticles tend to be aggregated when the coverage isless than unity, while they are very stable when the surface is covered with a double layer of the surfactantmolecules.
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