Journal
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
Volume 127, Issue 10, Pages -Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s00339-021-04920-z
Keywords
Nanoparticles; Doping; XRD; Optical property; Photoluminescence; SQUID; Thermal behavior
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Zn(1-x)NixS nanoparticles with different Ni concentrations were successfully synthesized and their properties were studied using various characterization techniques. The results revealed that the Ni doping concentration affects the optical, structural, and magnetic behavior of the ZnS nanoparticles.
Zn(1-x)NixS nanoparticles with Polyvinylpyrrolidone (PVP) are synthesized for different Ni concentration of x = 0, 0.05, 0.10, 0.15 using microwave heating by chemical route. EDS of all samples confirms presence of Zn, S and Ni without any impurities. XRD and TEM study reveals that pristine and Ni-doped ZnS samples possess cubic (Zinc Blende) structure without secondary phase or impurity phase formation such as NiO or NiS, up to 15% Ni doping. Raman spectra analysis corroborates the results of XRD and TEM, as observed from TO (Transverse Optical) and LO (Longitudinal Optical) phonon modes. UV-Vis absorption spectra show increment in the bandgap with increasing Ni doping concentration. The functional groups associated with the vibration of molecules are investigated by FTIR spectroscopy. We observed quenching in photoluminescence intensity at high Ni concentration in ZnS. Magnetic behavior is studied for the 15% Ni-doped ZnS by SQUID measurements. 520 K is the thermal stability of Ni-doped ZnS nanoparticles in the present case and is studied by TGA/DTG curves.
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