Analysis of Silver Nanoparticles Produced by Chemical Reduction of Silver Salt Solution

In the present research silver colloid was produced by chemical reduction of silver salt (silver nitrate AgNO3) solution.As a reducer sodium citrate was used. UV-VIS spectrometry indicated formation of nanoparticles. The surface plasmonresonance peak in absorption spectra of silver colloidal solution showed an absorption maximum at 450 nm. Comparisonof theoretical (Mie light scattering theory) and experimental results showed that diameter of silver nanoparticles incolloidal solution is about 100 nm. Silver nanoparticles were deposited on two substrates: silica (SiO2) and polyethyleneterephthalate (PET) modified with various polymers (polycarbonate (PC), polymethyl methacrylate (PMMA),polystyrene (PS)). The colloidal silver was incorporated by dip-coating to the polymer-substrate structures. X-rayfluorescence spectroscopy (XRFS) and atomic force microscopy (AFM) results indicate that produced structures includesilver nanoparticles. It was found that during deposition, silver nanoparticles forms aggregates on the surface. The sizeof aggregates varied from 240 nm to 400 nm.