Manipulation of the size and shape of metal nanoparticles has attracted a great deal of attention recently and opened-up possibility for their usage in various fields such as microelectronics and optics. Prismatic and plate-like silver nanoparticles synthesized in water by colloidal chemistry methods, were used as a precursor for preparation of transparent and colored Ag/PVA nanocomposite films. Due to structural anisotropy of prismatic and plate-like silver nanoparticles, confirmed by TEM measurements, in absorption spectrum were observed three surface plasmon resonance bands. In absorption spectrum of Ag/PVA nanocomposite film appears only one absorption band. Interaction between Ag nanoparticles and PVA matrix was followed using FTIR spectroscopy. The thermal properties of Ag/PVA nanocomposite film has been examined using TGA and DSC techniques. The thermal decomposition of the PVA matrix in the presence of shaped Ag nanoparticles is shifted towards higher temperatures for about 14o C in argon atmosphere. Slightly higher thermal stability was obtained during thermo-oxidative degradation process. DSC measurements revealed that shaped Ag nanoparticles incorporated in PVA matrix do not have significant influence on the crystallization temperature changes
