Synthesis of cobalt-doped cadmium sulphide nanocrystals and their optical and magnetic properties

摘要: Cobalt-doped cadmium sulphide (CdS) nanocrystals (NCs) were synthesized with three different cobalt concentrations by aqueous chemical coprecipitation method. Dopant incorporation was recognised using X-ray diffraction (XRD) analysis a shift in the peaks and compression lattice. The size crystallinity of cobalt-doped CdS NCs studied high resolution transmission electron microscopy (HRTEM). blue spectra band gap value Co-doped estimated reflectance UV spectrophotometer. Variation luminescence properties fluorescence spectroscopy. change optical supports Co NCs. BET measurement revealed that powders had relatively specific surface area 131.30, 106.93 102.04 m2/g for 2, 4 6% Co:CdS, respectively. Room temperature magnetisation vibrating sample magnetometer both NCs, which weak ferromagnetic signal strong hysteresis