Novel formation mechanism of Ag/PANI/PVP core-shell nanocomposites

Recently, polymer-inorganic nanocomposites core shells have attracted great attention as new materials because of their novel mechanical, electrical, and optical properties. In this article, we report a simultaneous synthesis of polyaniline (PANI) nanoparticles and Silver (Ag) nanoparticles to form Ag/PANI nanocomposite core-shell embedded in polyvinilpirrolidone (PVP) by using hybrid chemical and gamma-irradiation oxidation process of aniline and reduction of Ag ions, respectively in the presence of dodecylbenzenesulphonic acid (DBSA). The mechanism of formation of Ag/PANI/PVP core-shell is proposed in this article. In addition, the effects of gamma-dose and Ag ions concentration on structural, and optical, properties of the nanocomposites PVP/PANI/Ag coreshell were carefully examined. The structural and morphological studies show the presence of PANI with regular granular nanostructure as a shell with a diameter of 20 nm and Ag nanoparticles with spherical shape as a core and diameter less than 10 nm. The average particle size of my modified Ag/PANI nanoparticles decreased with increasing dose and decreasing of precursor concentration due to increase of nucleation process over aggregation process during gamma irradiation. The UV-Visible Spectroscopy, Scanning Electron Microscopy (SEM) and the TEM showed appreciated result of formation Ag/PANI which is going to be discussed in current studies.