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In this work, Cu+2-doped ZnS semiconductor nanoparticles have been synthesized using co-precipitation route caped with various surfactants such as diethyl-amine (DEA), poly-vinyl alcohol (PVA), cetyl trimethylammonium bromide (CTAB), polyethylene glycol (PEG) and triethyl-amine (TEA). The structural analysis has been carried out by X-ray diffractometer (XRD) and Fourier-transform infrared spectroscopy (FTIR). Morphological and elemental analysis have been performed by scanning electron microscopy (SEM) and X-ray-dispersive X-ray spectroscopy (EDX), respectively. XRD and FTIR have revealed the cubic structure of prepared nanoparticles. The crystallite size has been calculated in the range 15–20 nm through XRD. A hexagonal peak of ZnO is also observed in XRD pattern. The optical and electrical properties have been studied through UV–Vis spectroscopy and Four-point probe technique, respectively. EDX has revealed the presence of S, Cu and Zn as major elements in prepared samples. Optical band gap energy has been estimated in the range 3.6–4.2 eV with absorption edge from 270 to 277 nm. The conductivity of prepared samples has been increased with the decrease in band gap. [ABSTRACT FROM AUTHOR]

Abstract: The contribution of an external magnetic field on the deposition of BaFe12O19 thin film was investigated. For this purpose, two (one with applied field and another without field) thin films of BaFe12O19 were deposited on the C-plane oriented sapphire (Al2O3) substrate employing pulsed laser deposition technique. Crystallographic orientation and texture were determined using an X-ray diffractometer. The magnetic parameters were deduced from a vibrating sample magnetometer (VSM). A spectrometer was used to study the optical properties of the films. The structural results reveal the film to be predominantly single phase with C-plane orientation in both the cases. The film deposited with field, however, has bigger grain size and more perfection in crystallinity. The magnetic parameters show that the film deposited with the field has more remanence magnetization and higher coercive field. The diffuse reflectance of the film deposited with field is much higher due to the increased grain size and roughness. [Copyright &y& Elsevier]