Faculty of Natural Sciences

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Browsing Faculty of Natural Sciences by Subject "AACVD"

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    Aerosol-assisted CVD of cadmium diselenoimidodiphosphinate and formation of a newiPr2N2P3 + ion supported by combined DFT and mass spectrometric studies
    (Royal Society of Chemistry (RSC), 2016-10-25) Oyetunde, Temidayo
    Aerosol-assisted chemical vapour deposition (AACVD) of Cd[(SePiPr2)2N]2 is shown to deposit cadmium selenide and/or cadmium phosphide on glass substrates, depending upon the growth conditions. The phase, structure, morphology and composition of the films were characterised by X-ray powder diffraction (XRD), scanning electron microscopy, energy dispersive X-ray analysis and X-ray photoelectron spectroscopy. The XRD indicated a hexagonal phase for cadmium selenide, whilst cadmium phosphide was monoclinic. Pyrolysis gas chromatography-mass spectrometry and density functional theory were used to deduce a breakdown mechanism for the deposition that favoured the formation of a new aromatic iPr2N2P3+ ion.
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    Cadmium Sulfide and Cadmium Phosphide Thin Films from a Single Cadmium Compound
    (American Chemical Society (ACS), 2011-02-10) Oyetunde, Temidayo
    Aerosol-assisted chemical vapor deposition of Cd[(SPiPr2)2N]2 leads to the growth of cadmium sulfide and/or phosphide thin films on glass. Decomposition of the precursor has been studied by pyrolysis-gas chromatography/ mass spectrometry and modeled by density functional theory.
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    The deposition of cadmium selenide and cadmium phosphide thin films from cadmium thioselenoimidodiphosphinate by AACVD and the formation of an aromatic species†
    (Royal Society of Chemistry (RSC), 2019-01-10) Oyetunde, Temidayo
    Aerosol-assisted chemical vapour deposition (AACVD) of Cd[(SPiPr2)(SePiPr2)N]2 yields hexagonal cadmium selenide and monoclinic cadmium phosphide films on glass substrates between 475 and 525 °C at different argon flow rates. The films were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), energy dispersive analysis of X-rays (EDAX) and X-ray photoelectron spectroscopy (XPS). All the results of XRD, EDAX and XPS are in agreement with our previous investigations on Cd[(SePiPr2)2N]2. A breakdown mechanism is proposed based on mass spectra and density functional theory calculations. A large peak at m/z 207 in the mass spectra, previously assigned by us as a new aromatic species, is also observed for this complex.