Investigation on structural, optical and dielectric properties of Co doped ZnO nanoparticles synthesized by gel-combustion route Article

Ansari, SA, Nisar, A, Fatma, B et al. (2012). Investigation on structural, optical and dielectric properties of Co doped ZnO nanoparticles synthesized by gel-combustion route . MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS, 177(5), 428-435. 10.1016/j.mseb.2012.01.022

cited authors

  • Ansari, SA; Nisar, A; Fatma, B; Khan, W; Naqvi, AH

authors

abstract

  • We report the synthesis of Co doped ZnO nanoparticles by combustion method using citric acid as a fuel for 0%, 1%, 3%, 5% and 10% of Co doping. The structural, optical and dielectric properties of the samples were studied. Crystallite sizes were obtained from the X-ray diffraction (XRD) patterns whose values are decreasing with increase in Co content up to 5%. The XRD analysis also ensures that ZnO has a hexagonal (wurtzite) crystal structure and Co 2+ ions were successfully incorporated into the lattice positions of Zn2+ ions. The TEM image shows the average particle size in the range of 10-20 nm for 3% Co doped ZnO nanoparticles. The energy band gap as obtained from the UV-visible spectrophotometer was found gradually increasing up to 5% of Co doping. The dielectric constants (ε′, ε″), dielectric loss (tan δ) and ac conductivity (σac) were studied as the function of frequency and composition, which have been explained by 'Maxwell Wagner Model'. © 2012 Elsevier B.V. All rights reserved.

publication date

  • March 25, 2012

published in

Digital Object Identifier (DOI)

start page

  • 428

end page

  • 435

volume

  • 177

issue

  • 5