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Microwave synthesis, optical, structural and magnetic characterization of ZnO/Mn doped ZnO nanoparticles

A. K. SINGH1

Affiliation

  1. Nanomaterials and Sensors Lab., Defence Institute of Advanced Technology (Deemed University), Girinagar, Pune411025, Maharashtra, India.

Abstract

Paper reports the synthesis of ZnO/Mn doped ZnO nanoparticles via microwave method using Zinc Acetate, Manganese Acetate in de-ionized (DI) water and Polyvinlypyrolidone (PVP) as a capping agent. X-ray diffraction (XRD), Scanning electron microscopy (SEM) and Energy dispersive X-ray ( EDAX ) is used for structural and morphological characterization of ZnO/Mn doped ZnO nanoparticles. Particle size has been calculated using effective mass approximation method from UV-VIS spectroscopy and Scherrer’s formula from XRD patterns which is in good agreement with the result obtained from SEM. XRD analysis reveal single crystal ZnO/Mn doped ZnO nanoparticles of size 10-59 nm. Effect of capping agent on the particle size of the ZnO has been studied using UV-VIS and particle size analyzer. PL of ZnO/Mn doped ZnO sample has beeen also recorded at room temperature with excitation wavelength 325 nm. Sharp ultraviolet emission of the band edge luminescence has been observed at 3.27 eV (380 nm) in case of ZnO whereas peak emission has been observed at 3.2059 eV (387 nm) in case of Mn doped ZnO nanoparticles. VSM of synthesized Mn doped ZnO nanoparticles annealed at 527 K for 9 hrs has been investigated at room temperature and ferromagnetic behavior is observed..

Keywords

Micro wave synthesis, Mn doped ZnO, UV-Vis, SEM, photoluminescence, VSM.

Submitted at: Oct. 12, 2010
Accepted at: Nov. 19, 2010

Citation

A. K. SINGH, Microwave synthesis, optical, structural and magnetic characterization of ZnO/Mn doped ZnO nanoparticles, Journal of Optoelectronics and Advanced Materials Vol. 12, Iss. 11, pp. 2255-2260 (2010)