The morphology of silver particulate films can be characterized by their size, size distribution, shape and inter-particle separation. These can be modified by blending of polymers along with the amount of silver deposited on them [1].  

Polymer blends (PS/PVP/P2VP/P4VP) were prepared through solution blending by mixing in a common solvent, Dimethylformamide (DMF) and distilled water at room temperature. Blends of polymer composite with different compositions ranging from 0 to 100 % were prepared and charecterised[2]. Silver films of various thicknesses were deposited on these polymer composites held at 457 K in a vacuum better than 8 × 10-6 Torr at the deposition rate of 0.4nm/s. Morphological studies were carried out by Optical absorption spectra and Scanning electron micrographs of the silver particulate films. 

Blending of polymers provide the requisite matrix so that the property of both the homo polymers can be combined for the desired results. By varying the blend compositions suitable polymer composite can be obtained. In-situ electrical resistance measurements yield about structure of discontinuous silver particulate films deposited on polymer composites. Negative temperature coefficient of resistances (TCR) play key role in identification of nature of silver particulate films. The dc resistances of the particulate film are exponentially dependent on inter-cluster separation or tunneling length. Also, the electrical conductivity of composites is increased with high silver loading. Polymer-metal interaction plays an active role in the morphology of these films [3-5]. Silver nanocomposite film exhibits characteristic UV absorbance spectrum at a wavelength of 430 nm, due to the surface plasmon resonance of nanosized silver. These nanoparticles exhibit unique optical properties originating from the characteristic surface plasmon by the collective motion of conduction electrons. The differences in dispersion, size distribution and impregnation depth results from the differing natures of the polymeric hosts. 

Deposition of silver on polymer blends coated substrate held at 457 K provides an approach to produce stable island films with reasonable control over their electrical resistance. The size distribution and dispersion of silver nanoparticles is found to be dependent on the nature of the host polymer and thickness of particulate films. It is an approach towards obtaining low cost, stable thin silver films on polymer composites for device applications.