The Effect of Co Incorporation into ZnO Nanoparticles

Abstract

Co-doped ZnO nanoparticles are synthesized by co-precipitation method. The incorporation of Co ions into ZnO wur- zite structure with increasing Co concentrations was followed by X-ray diffraction. Sample structures were further studied by infrared spectra, from which a broad and strong absorption band in the range of 400 - 700 cm-1 and -OH stretching vibrational mode approximately 3400 cm-1 were observed. Ultraviolet-visible measurements showed a red shift of the absorption edge and four peaks at 468, 515, 577 and 629 nm in its reflectance spectra with increasing Co content. Magnetic measurements showed a ferromagnetic behavior for all samples. From the ESR spectra the presence of Co-metal clusters and Co-oxide precipitates are not observed and can be excluded as the origin of ferromagnetic in our samples. The ESR results are supported by UV-Vis measurements data.

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N. Djaja, D. Montja and R. Saleh, "The Effect of Co Incorporation into ZnO Nanoparticles," Advances in Materials Physics and Chemistry, Vol. 3 No. 1, 2013, pp. 33-41. doi: 10.4236/ampc.2013.31006.

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The authors declare no conflicts of interest.

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