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Co doping CdS nanocrystals were synthesized in aqueous solution using mercaptoacetic acid as stabilizer. The prepared nanocrystals were examined using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR) and UV-vis absorption spectroscopy (ABS). The cubic zinc blende nanocrystals were determined and the sizes were estimated by XRD. The compositions of...
In this work wettability and adsorption of OH- groups and H2O particles on the surface of TiO2 thin films doped with different concentration of Tb have been described. Thin films were manufactured by magnetron sputtering process. The particles were sputtered from metallic Ti-Tb target under low pressure of oxygen gas. The results of structural investigation (X-ray diffraction measurements) have shown...
Thin films of TiO2 were prepared on glass substrates by reactive evaporation of TiO. Properties of the thin films were investigated under ultrahigh vacuum conditions by X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). AFM topography exhibits a uniformity structure of the thin films and shows a high quality nanocrystalline structure of TiO2 with grain size ranging from 28 nm...
We report on the room temperature ferromagnetism in Co-doped wurtzite ZnS nanocrystals with size of about 5 nm, which gradually becomes weak as the increase of doping concentration. The coercivities for all samples maintain at about 200 Oe, and the saturation magnetic moment per Co ion decreases sharply for high doping samples. Besides ferromagnetism and paramagnetism, the temperature dependence of...
The ZnO nanotretapods prepared by a catalyst-free thermal oxidation between zinc vapor and oxygen were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and photoluminescence spectroscopy (PL). To improve the gas-mixing in the reactor, nitrogen gas was supplied in pulse into the reaction zone. This method could affect the oxygen vacancy...
The control dimension and morphology in zinc oxide (ZnO) nanorods are critical issues in the fabrication of electronic and optical nanodevices. This study discusses ZnO nanorods on an ITO-laminated plastic substrate of polyethylene terephthalate. The substrate was immersed in a zinc nitrate hexahydrate Zn(NO3)2.6H2O and hexamethylenetetramine C12H6N4. solution under various deposition conditions....
Controlled doping appropriate elements into semiconductor nanostructures is of vital importance to develop novel materials and functional devices. Herein, we present three methods to synthesize Cu-doped ZnO nanostructures using a simple vapor phase transport process and adopting CuCl2, CuO or Cu as doping precursors. The corresponding morphology, structure, and chemical composition were investigated...
W18O49 nanotip arrays were prepared by a two-step high-temperature, catalyst-free physical evaporation deposition process in high-purity argon gas. The prepared products were characterized by scanning electron microscopy, energy-dispersive spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy and transmission electron microscopy. Field emission measurements were carried out with a transparent...
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