Optical and Magnetic Properties of Cu-Doped ZnO Nanoparticles
P. D. Sahare1, Vipin Kumar2

1Prof. P. D. Sahare, Department of Physics & Astrophysics, University of (Delhi), India.
2Vipin Kumar, Department of Physics & Astrophysics, University of (Delhi), India.
Manuscript received on 10 November 2013 | Revised Manuscript received on 18 November 2013 | Manuscript Published on 30 November 2013 | PP: 15-21 | Volume-3 Issue-6, November 2013 | Retrieval Number: F1304113613/13©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: Effect of Cu2+ ions doping on the photoluminescence (PL) and magnetic behavior of ZnO based host material nanoparticles have been investigated. A simple chemical route has been employed for the synthesis of Cu2+ incorporated ZnO nanoparticles for the present study. The prepared synergetic nanoparticles were analyzed for structural confirmation under X-ray diffraction (XRD) and Raman spectroscopic investigations. XRD patterns of the prepared nanoparticles of different Cu2+ concentrations reveal some shifting in the peak positions compared to that of the pure ZnO, which is attributed to the structural deformation in the presence of Cu2+ ions. Furthermore, transmission electron microscopy (TEM) studies have been performed for studying their morphology. TEM studies clearly show the formation of spherical and quasi spherical shaped nanoparticles of ~ 50 nm diameters. It is revealed from PL studies that the band-edge/UV emission decreases, whereas, the visible emission is found to increase with increase of the doping concentration. The decrease in the band-edge emission can be attributed to the substitution of Zn2+ by Cu2+ ions in the ZnO lattice. Beside, these optical properties, magnetic properties of ZnO nanoparticles has also been found to be affected by Cu doping, investigated using vibrating sample magnetometer (VSM). It has been observed from VSM study that the ferromagnetic behaviour of ZnO nanoparticles is found to enhance with increase in doping concentration.
Keywords: Zno Nanoparticles, Cu2+ Doping, Photoluminescence, Magnetic Properties, M-H Loops, Surface Defects.

Scope of the Article: Bio-Science and Bio-Technology