2D and 3D ordered structure of silver nanoparticles from hydrosol

In recent years, the physical characteristics of noble metal nanoparticles are of considerable interest to material research. We made an effort to get superlattices of Ag nanoparticles at the air/water interface so as to apply various types of measurement by transferring the formed superlattices to suitable substrates. Basic procedure involved is based on a process recently developed for mercaptosuccinic acid (MSA) modified Au nanoparticles. The MSA protected Ag nanoparticles powder was redispersed in distilled water. HCl was added and the solution was left for several days at room temperature. Small crystallites appeared at the air/liquid interface. The diameter of the nanoparticles constructing the 2D superlattice was found to be larger than the parent nanoparticles.