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Open Access Copper-substituted cobalt ferrite nanoparticles: Structural, optical and antibacterial properties

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Economic and simple co-precipitation technique was used to synthesize cobalt ferrite nanoparticles (Cu x Co(1– x )Fe2O4) where x = 0.0, 0.3, 0.5, 0.7 and 1.0. We systematically studied the crystal structure and antibacterial properties of samples as a function of Cu-substituted content. Increasing Cu concentration causes decrease in the nanoparticle size from ∼30 to ∼20 nm. Specific saturation magnetization (Ms), remanent magnetization (Mr) and coercivity (Hc) of the spinel ferrites are diminished by the substitutions of Cu+2 ions. FTIR spectra exhibit two prominent fundamental absorption bands at ∼595 cm–1 and 419 cm–1. These bands correspond to intrinsic stretching vibrations of metal at tetrahedral and octahedral site respectively. The Raman scattering results reveal that increase in the Cu content enhances the local disorder at both tetrahedral and octahedral sub lattices. Moreover, we found that substitution of cobalt with copper leads to high reactive oxygen species (ROS) which in turn enhance the antibacterial ability, as exhibited by optical density and inhibition zone diameter (IZD). The results indicate that the substitution of Co with Cu in Co ferrite nanoparticles strongly influences the microstructure, crystal structure and particle diameter.

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Keywords: ANTIBACTERIAL PROPERTIES; COBALT FERRITE NANOPARTICLES; RAMAN SPECTROSCOPY; REACTIVE OXYGEN SPECIES; STRUCTURAL ANALYSIS

Document Type: Research Article

Publication date: December 1, 2016

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  • Materials Express is a peer-reviewed multidisciplinary journal reporting emerging researches on materials science, engineering, technology and biology. Cutting-edge researches on the synthesis, characterization, properties, and applications of a very wide range of materials are covered for broad readership; from physical sciences to life sciences. In particular, the journal aims to report advanced materials with interesting electronic, magnetic, optical, mechanical and catalytic properties for industrial applications.
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