Synthesis of non-oxide semiconductor nanoparticles and nanostructured coatings through a high temperature reducing jet process
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This dissertation reports the gas-phase synthesis of binary copper chalcogenide nanoparticles and nanostructured coatings. The goals of the research described here are: 1. Development of semiconducting nanoparticles and nanostructured coatings. 2. Characterization of their chemical composition, crystalline phase, thermal stability and optical properties. The High Temperature Reducing Jet (HTRJ) reactor was used to produce these nanoparticles and nanostructured coatings. The HTRJ process is an economical and continuous route for the production of non-oxide nanoparticles of a range of metals and semiconductors. The work described in this thesis is the first demonstration of the application of this process to semiconductor, rather than metal, nanoparticles. Copper selenide and copper telluride nanoparticles and nanostructured coating were synthesized and characterized using Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), X-Ray Diffraction (XRD), Differential Scanning Calorimeter (DSC) combined with Thermo Gravimetric Analysis (TGA), and UV-VIS-NIR optical absorbance spectroscopy.