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Investigation of the possible correlations between the structural, optical and magnetic traits of NixZn1-xO nanoparticles fabricated via modified Pechini method

M. H. AHMADI1,* , ALI ABDOLAHZADEH ZIABARI1,2

Affiliation

  1. Department of Optics and Laser, Faculty of Engineering, Lahijan Branch, Islamic Azad University, P.O. Box161, Lahijan, Iran
  2. Nano Research Lab, Lahijan Branch, Islamic Azad University, P.O. Box161, Lahijan, Iran

Abstract

Undoped and Ni-doped ZnO nanocrystalline powders were successfully synthesized by the sol–gel Pechini method. Analysis of the samples with X-ray diffraction showed that these nanopowders had a polycrystalline wurtzite structure. With Ni concentration increasing up to 10 Wt.%, all diffraction peaks corresponded to wurtzite structure of ZnO, but for Zn0.9Ni0.1O, secondary phase of NiO emerged. Based on the results of X-ray photoelectron spectroscopy (XPS), Ni incorporated into the ZnO lattice as Ni2+. Scanning electron microscopy illustrated the formation of evenly distributed sphere like nano-clusters. UV-vis absorption results show that the band edge of ZnO nanoparticles is blue shifted with Ni doping concentration. The room temperature photoluminescence (PL) measurements illustrate UV emission around 390 nm (3.17 eV), which is ascribed to the near-band-edge (NBE) emissions of ZnO and broad green emission around 510 nm. The results of vibrating sample magnetometer (VSM) measurements showed that the low and heavy doped ZnO nanoparticles have more diamagnetic features while the moderate doped sample possesses good ferromagnetic characteristics..

Keywords

Nanopowder, Pechini method, XPS, Optical properties, Magnetic properties.

Submitted at: Feb. 5, 2015
Accepted at: March 19, 2015

Citation

M. H. AHMADI, ALI ABDOLAHZADEH ZIABARI, Investigation of the possible correlations between the structural, optical and magnetic traits of NixZn1-xO nanoparticles fabricated via modified Pechini method, Journal of Optoelectronics and Advanced Materials Vol. 17, Iss. 3-4, pp. 444-450 (2015)