X-Ray Diffraction Study of Effect of Filler Concentration and Thickness of Poly-p-xylylene–Cadmium Sulphide Nanocomposite Films on Their Structure.

Autor: Ivanova, O. P., Krivandin, A. V., Krinichnaya, E. P., Piryazev, A. A., Zav'yalov, S. A., Zhuravleva, T. S.
Zdroj: Nanotechnologies in Russia; Nov2020, Vol. 15 Issue 11/12, p753-759, 7p
Abstrakt: The structure of poly-p-xylylene–cadmium sulfide (PPX–CdS) nanocomposite films of different thickness (~0.2, ~0.5, and ~1 μm) is studied by X-ray diffraction in a wide range of CdS concentrations, as well as the structure of single-component CdS and PPX films of different thickness. The films are obtained by solid-phase cryochemical synthesis on optical quartz and single-crystal silicon substrates. The results of the study show that CdS nanoparticles in PPX-CdS films with a thickness of ~ 0.2 μm with filler content of C ~ 10.5–13.5 vol % and in a CdS film of the same thickness have a crystal structure of a wurtzite type with an average size of coherent scattering regions of ~30 nm in PPX–CdS and ~60 nm in CdS films. For nanocomposite films with a thickness of ~0.2 μm (C ~ 8 vol %), ~0.5 and ~1 μm (C ~ 5–90 vol %), as well as for a CdS film with a thickness of ~1 μm, only diffusive diffraction maxima are observed, on the basis of which the conclusion is drawn that the CdS nanoparticles in these films have an amorphous or defective crystal structure and a size of ~1–3 nm. The PPX matrix in all studied nanocomposite films has a low-ordered (amorphous) structure, as in a single-component film of this polymer with a thickness of ~0.5 μm. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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