Abstract
The undoped and rare earth metals (Ce and Nd) doped CuO nanoparticles were prepared by the co-precipitation method. The synthesized NPs exhibited a monoclinic structure and the secondary phase corresponding to dopants was traced in XRD spectra. A strong correlation was noticed between calculated average crystallite size from XRD and FESEM images. The Ce dopant enhanced agglomeration of NPs and Nd turned the particle morphology into a nano-spam like structure. Elemental compositions were obtained from EDAX spectra. The rare-earth dopant produced a blue shift in the bandgap of NPs, hence the absorption edge was shifted towards the higher wavelength side. The NBE emission in the UV region and defects related to violet, blue and green emissions were noticed in the PL spectra of NPs. The antibacterial activity of NPs was studied against gram-negative bacteria (E. aerogenes) and gram-positive bacteria(B. subtilis). The average crystallite size, chemical composition, and cell wall membrane of bacteria were influenced by the antibacterial activity of NPs.
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