CuO films compose of copper oxide nanorods and nanograins with fcc type of structure have been prepared by multistep PVD / thermal oxidation method at different temperatures of annealing (400, 500and 600 °C). Ni-C nanocatalyst films was the factor lowering temperature and duration time of thermal oxidation (in comparison with literature data for similar methods) in which nanorods have been obtained. Obtained nanostructural films (composed of 1D and 2D objects) were characterized with XRD, SEM, EDX and Raman spectroscopy. All applied methods proved that the CuO nanostructural film is formed due to thermal oxidation of prepared multilayer film.
CuO nanorods with the breadth of 60÷120 nm and the length up to 10 µm were synthesized using PVD method and thermal oxidation process. After PVD process a thick film composed from small nickel nanoparticles embedded in carbonaceous matrix was formed on the pure Cu surface. During the next step, the obtained film was heated with rising temperature under the air and annealed at different temperatures for 30 minutes. As a result a surface layer with a complex structure was formed. Microscopic examination revealed the complexity of the investigated structure. SEM, TEM, EDX and XRD investigations were performed. High resolution TEM studies revealed the subtle structure of CuO nanowires that was grown of the granular surface of CuO layer. CuO nanowires characterized by varied length and diameter.
In this work molecular and crystalline structure of new type of nanocomposite films were investigated. These films compose of CNT decorated with palladium nanograins. They were prepared on a base of C-Ni films modified in CVD process. C-Ni nanocomposite films were obtained by PVD process and their modification by CVD leads to a growth of CNT film. CNTs-Ni or C-Ni films were treated with additional PVD process with palladium.
Nickel and palladium acetate and fulleren C60 are precursors of films in PVD process. FTIR spectroscopy was used to studied the molecular structure of film in every stage of preparation . The crystalline structure of these films was studied by X-ray diffraction. SEM (scanning electron microscopy) was applied to investigate film’s surface topography.
The thermal stability of two types of C-Pd films prepared in PVD process were studied. These films are composed of Pd nanograins embedded in a multiphase carbonaceous matrix. These films were distinguished by Pd content. These films were annealed in a range of temperatures 50÷1000°C. The structural, topographical and molecular changes were studied by scanning electron microscopy (SEM), infrared spectroscopy (FTIR) and X-ray diffraction (XRD) methods. The results show that investigated films are thermally stable up to 200°C.
Titanium oxide displays, among others, catalytic and bactericidal properties, as well as the capacity to absorb UV radiation. The properties may differ significantly depending on the phase composition. This is why for the prospective applications it is necessary to determine the effect of the obtaining process parameters on the phase composition and, consequently, on the properties of the obtained samples. In our work we present results of Raman spectroscopy and X-ray diffraction studies of TiO2 layers obtained in sol-gel method. The work will present effects of calcination temperature on the structure of the obtained layers. Raman Spectroscopy is a useful method of identification, allowing to distinguish the anatase phase from the rutile phase.
The short range order around Pd atoms in nanometer-size grains embedded in carbonaceous films deposited with two-step
process: physical vapor deposition (PVD) followed by chemical vapour deposition (CVD) was studied. The Pd K-edge
X-ray Absorption Fine Structure Spectroscopy was applied. We have found that grains obtained in a sole PVD process
contained metallic fcc palladium or amorphous palladium oxide dependently on Pd concentration and duration time of
process. In the oxide fraction a short range order around Pd atoms was strongly reduced as compared to a reference PdO
powder. Subsequent CVD resulted in pure Pd fcc crystallites. The accompanying annealing was found to predominantly
determine the content and structure of formed Pd grains.
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