%0 Journal Article %T Co-Precipitation Synthesis and Characterization of Nanocrystalline Zinc Oxide Particles Doped with Cu<sup>2+</sup> Ions %A Mergoramadhayenty Mukhtar %A Lusitra Munisa %A Rosari Saleh %J Materials Sciences and Applications %P 543-551 %@ 2153-1188 %D 2012 %I Scientific Research Publishing %R 10.4236/msa.2012.38077 %X Nanocrystalline Cu-doped ZnO particles were synthesized by the co-precipitation method. The composition, structural, optical and magnetic characterizations were performed by energy dispersive X-Ray spectroscopy, X-Ray diffraction, UV-Visible spectrometer, and vibrating sample magnetometer. The results confirmed that nanocrystalline Cu-doped ZnO particles have a hexagonal wurtzite structure with a high degree of crystallization and a crystallite size of 10 - 16 nm. For Cu above 11 at%, the X-Ray diffraction pattern possessed CuO secondary phase which shows the solubility limit of Cu in the ZnO lattice. Up to 11% at Cu, the presence of Cu in the ZnO lattice as Zn substitution indicated by an in- crease in lattice parameter values. Nanoparticles showed weak ferromagnetic characteristics at room temperature. The absence of secondary phase related to magnetic precipitate shown intrinsic ferromagnetic behaviour. %K Cu-Doped ZnO %K Structural Properties %K Room Temperature Ferromagnetism %U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=21796