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Silicon nanocrystallites embedded in silicon nitride were prepared by high-temperature annealing of silicon-rich silicon nitride (SRN) via the phase separation reaction. Chemical composition and bonding structures of the SRN were explored using X-ray photoelectron spectroscopy (XPS). Raman spectroscopy and photoluminescence (PL) measurements were also conducted to probe the luminescent properties...
ZnO nanoparticles (NPs) in the size range 7-40 nm have been synthesized by ball milling technique, and microstructural and photoluminescence properties of the NPs are studied by using varieties of techniques. Our results are compared with those of the commercially procured ZnO nanopowders. X-ray diffraction and high resolution transmission electron microscopy studies reveal a compressive strain in...
Size quantised cadmium sulphide (CdS) nanocrystalline thin films with different particle sizes and stoichiometric ratios were successfully grown on indium tin oxide substrates using an aqueous synthetic route. The effect of cadmium (Cd) to sulphur (S) ratio on the optical properties of CdS nanocrystalline films was investigated using EDAX, UV-vis spectroscopy, photoluminescence and Raman spectroscopy...
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