Study of silver colloids plasmonic characteristics obtained by ultrafast laser ablation in liquid media

J. M. J. SANTILLÁN; D. MUÑETÓN; L. B. SCAFFARDI; D. C. SCHINCA

Pucón

Congreso; IX Reunión Iberoamericana de Óptica RIAO/OPTILAS 2016; 2016

Ꞡ e interest in silver nanoparticles (AgNPs) has contin-uously grown in recent years, driven by the particulari-ty of their physical and chemical properties for applica-tions in diff erent 鎄 elds of science and technology [1-4].Ꞡ e control of the size, shape, and stability is a very im-portant issue in AgNPs synthesis. Ꞡ e most diff used methods are based on the chemical reduction of Ag ions in solutions and give good results in terms of the 鎄 -nal size and shape of the AgNPs. Nevertheless, this type of synthesis always needs surfactants or other chemical products, which are present at the end of the prepara-tion [5], rendering incompatibility of the colloids for speci鎄 c applications.Ꞡ e generation of free metal NPs of chemicals has given rise to an active area of research re-lated to the synthe-sis of NPs in liquid media by laser ablation from a solid metal disc [6-8].Ꞡ is paper studies the plasmonic characteristics of the absorption spectra of Ag colloidal suspensions synthe-sized by ultrashort pulsed laser ablation, from a disk of Ag immersed in organic media at diff erent energies.Moreover, the stability of the NPs is analyzed through time of the plasmon resonance position and FWHM.