The spectra acquired upon room temperature implantation show âˆ❂0% of the probe atoms as Fe2+ on perturbed Zn sites and the rema.The lattice locations and electronic configurations of Fe in 57Co/57 Fe implanted ZnO (to (5â€∆) Ã- 1014 Fe/cm−2) have been studied by 57 Fe Mössbauer emission spectroscopy. The lattice locations and electronic configurations of Fe in 57Co/57 Fe implanted ZnO (to (5â€∆) Ã- 1014 Fe/cm−2) have been studied by 57 Fe Mössbauer emission spectroscopy. Lattice locations and properties of Fe in Co/ Fe co-implanted ZnO In addition, the ductility of the Zn-Fe coated mild steel was found to decrease significantly with increasing Fe content in the coating. The experimental results indicated that the ultimate tensile strength of the Zn-Fe coated mild steel was lower than the bare mild steel. This study aims in investigating the mechanical behaviour of Zn-Fe coated mild steel specimens, as no research investigation concerning the tensile behaviour of Zn alloy coated ferrous alloys has been reported in the past. Structural and metallurgical characterization of the produced coatings was performed with the aid of X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) techniques. The concentration of Fe in the produced alloy coatings ranged from 0 to 14 wt.%, whereas the thickness of the coatings was about 50 μm. Zinc alloy coatings containing various amounts of Fe were deposited by electrodeposition technique on a mild steel substrate. Mechanical behaviour of Zn-Fe alloy coated mild steel • The luminescence efficiency and stability of QDs could be improved in this manner. • The particle size and PL properties can be turned with the growth of ZnSe shell.
• ZnSe shell efficiently passivates surface defects by serving as a physical barrier. Highlights: • ZnSe:Fe/ZnSe core/shell QDs were prepared by a hydrothermal microemulsion method. Moreover, both transverse optic (TO) and longitudinal optic (LO) phonon modes of ZnSe are shifted toward lower frequency as compared with the reported ones. The growth of ZnSe shell causes a small red shift in PL spectra, and then the PL quantum yield (QY) increases from 16% before shell growth to the maximum of 37% after increasing shell thickness up to 1.2 monolayers (ML). The results show that the as-synthesized nanocrystals are cubic zinc blende ZnSe structure with high purity and the average particle size of ZnSe:Fe/ZnSe core/shell nanocrystal is larger than that of ZnSe:Fe core. The samples were characterized by means of XRD, EDX, TEM, PSD, XPS, photoluminescence, and Raman spectrum. Effective surface passivation of monodisperse ZnSe:Fe nanocrystals is achieved by overcoating them with a ZnSe shell. High-quality ZnSe:Fe/ZnSe core/shell nanocrystals were prepared via a hydrothermal microemulsion technique. Yang, Lin Zhu, Jianguo, E-mail: Xiao, Dingquan Synthesis and characterization of ZnSe:Fe/ZnSe core/shell nanocrystalsĮnergy Technology Data Exchange (ETDEWEB) L 1 = methylamine (Mea), dimethylamine (diMea), trimethylamine (triMea) L 2 = ethylenediamine (en), N-methylethylenediamine (N,Meen), N,N-dimethylenthylenediamines, (s-diMeen). The data are interpreted based on a monomeric structure with a local C sub(3v) symmetry around the iron atom. The compounds of the type L 1 L 2 ZnFe(CO) 4, not yet reported, are synthesized and studied by infrared spectroscopy.
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