Structure formation features of poly-p-xylylene – cadmium sulphide nanocomposite films

The films of polymer nanocomposites based on poly-p-xylenecontaining cadmium sulfide (CdS) as a filler were studied byX-ray diffraction and IR spectroscopy. The films were synthesized bygas-phase polymerization on the surface by joint vapor deposition ofp-xylene monomer and CdS, had thicknesses of ~0.2, ~0.5, ~1 and ~1.5μm, and contained from 5to 90 vol. % of CdS. It is shown that insuch films, depending on their thickness and filler content, CdSnanoparticles can be both X-ray amorphous and crystalline oriented withwurtzite-type structure (size ~30 nm) or with RCP structure (size~9 nm). The polymer matrix in the vast majority offilms is X-ray amorphous and yet oriented in some films.Oxygen-containing compounds are identified in many films, which appear tobe formed as a result of partial oxidation of thefilms when they are exposed to air after synthesis. Possibleinfluence of these compounds on the structure formation of CdSnanoparticles is discussed.