Synthesis of Monodisperse Silver Nanoparticles in Chitosan Solutions

It has been shown that monodisperse silver nanoparticles can be obtained in a chitosan solution. The temperature regime, reaction time, and pH of the reaction medium at which monodisperse silver nanoparticles with an average diameter of 65 nm are formed have been selected. The nanoparticles are potentially usable in medicine. Spectral studies have been performed to clarify the character of the interaction between chitosan and a silver salt. It has been found that not only hydroxyl groups of chitosan, but also its free primary amino groups, are involved in the reduction of silver ions and stabilization of formed nanoparticles.