Structural and optical properties of Co-doped ZnS nanoparticles synthesized by a capping agent

Optical and fluorescence properties of MgO nanoparticles in micellar solution of hydroxyethyl laurdimonium chloride

“…The surfactant selected in this study hydroxyethyl laurdimonium chloride (HY) classified as a typical cationic surfactant whose hydrophilic characteristics are improved by the presence of a hydroxyl group in its structure (see Figure 1). The HY can affect local aggregation which in turn can substantially enhance the stability, the optical and fluorescence properties [18,19]. Importantly, we found that the enhancement in the optical and fluorescence were dependent on the concentration of HY.…”

Chemical bath deposition of Fe-doped ZnS thin films: Investigations of their ferromagnetic and half-metallic properties

“…The growth in all the cases is quite similar resulting in agglomerated grains/clusters except enough variation in size but slight variation in shape. Here, it is worth mentioning that, the morphology of thin films was controlled by the optimized growth conditions [25] instead of using any additional surfactant or capping agent [31][32][33]. The deposition of ZnFeS on glass substrates would be demonstrated by nucleation as a function of deposition time rather than by the clusters and clusters deposition.…”

Effect of doping and changing of the annealing temperature on the structural and optical properties of ZnS

“…For the nanocrystallites' investigation, a Hitachi HD-2700 TEM equipped was utilized. 22 The increase in lattice parameter as ZnS doped with Mn is may be due to the substitution of a smaller ionic radius (Zn 2+ ) with a larger ionic radius (Mn 2+ ions, 0.80 Å), a similar observation was obtained in doped ZnS with Mn. Also, it is noticed from the XRD spectra that the width of the peaks decreased and its intensity became sharper with raise the annealing temperature, because of the increase in the crystallite size.…”

“…A similar result was obtained in ZnS nano particles doped with Co formed by a simple chemical procedure using alkyl hydroxylethyl dimethyl ammonium chloride as capping agent. 22 The increase in lattice parameter as ZnS doped with Mn is may be due to the substitution of a smaller ionic radius (Zn 2+ ) with a larger ionic radius (Mn 2+ ions, 0.80 Å), a similar observation was obtained in doped ZnS with Mn. 23 Furthermore, the average crystallite sizes (Cs) for all samples are in order of ~3 nm which was estimated using the following Scherrer equation 24 :…”

“…The variation of the energy gap of ZnS with annealed temperature and doped materials are shown in Figure 4C. The energy gap depends on the size of the formed ZnS and the method of preparation: ZnS prepared by chemical co-precipitation, 18 microwave-assisted chemical method using Polyvinylpyrrolidone, 32 simple chemical route using alkyl hydroxylethyl dimethyl ammonium chloride 22 have energy gaps (crystallite size) 3.5 eV (4.9 nm), 4.79 eV (6.73 nm), and 3.95 eV (4.8 nm), respectively. The energy gap depends on the size of the formed ZnS and the method of preparation: ZnS prepared by chemical co-precipitation, 18 microwave-assisted chemical method using Polyvinylpyrrolidone, 32 simple chemical route using alkyl hydroxylethyl dimethyl ammonium chloride 22 have energy gaps (crystallite size) 3.5 eV (4.9 nm), 4.79 eV (6.73 nm), and 3.95 eV (4.8 nm), respectively.…”