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Keywords: inorganic antibacterial, antibacterial textile, metal and metal oxide nanoparticle.The anti-bacterial characteristics of different nano-structured metal and metal oxides modified cotton fabrics were investigated. In this study, silver metal, copper, zinc and magnesium oxides have been supported on bleached cotton fabrics. Reduction, wet method, sol gel and precipitation methods were used in the preparation of the antibacterial nanoparticles (NPs). The preparation of the antibacterial-loaded cotton was carried out in-situ and ex-situ by pad dry methods. Formation of the supported nanoparticles was confirmed using x-ray diffraction (XRD), scanning electron microscopy studies (SEM) and energy dispersive x-ray (EDX) analyses. Antibacterial studies on the supported nanoparticles were done on gram positive (Bacillus and S. aureus) and gram negative (E-coli) bacteria by agar diffusion method. The loaded antibacterial nanoparticles are effective against the bacteria under investigation. Under the given experimental conditions, the maximum inactivation performances of each loaded inorganic agent were investigated. The loaded fabrics show the following antibacterial performance order against Bacillus subtilis is Ag=CuO>ZnO>MgO. However, the activity order is CuO>Ag>ZnO=MgO against S.aureus and E. coli. The inactivation performances depend on the type, purity and the amount of antibacterial nanoparticles on the textile surfaces.

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Introduction: The copper doped cobalt ferrite series, with nominal formula CuXCo1-XFe2O4 (X = 0, 0.25, 0.5, 0.75, 1), has been elaborated via sol-gel autocombustion process by copper substitution procedure into cobalt ferrite framework. Methods: The five synthesized ferrites have been analyzed by X-ray powder diffraction, Fourier transform infrared spectroscopy, field emission scanning electron microscopy coupled to energy dispersive X-ray spectroscopy, complex impedance spectroscopy and superconducting quantum interference device magnetometry. Results and Discussion: The analysis of the results allowed to deduce that the cubic spinel basic structure was not modified by the incorporation of copper into the host lattice and the corresponding pure fine powders obtained formed by homogeneous nanoparticles. The highest electrical conductivity value, σDC(373K) = 27.03x10-3S.cm-1, was observed in the case of CuFe2O4. Conclusion: Moreover, the superparamagnetic behavior at room temperature has been confirmed by using both ZFC-FC and hysteresis magnetic measurement modes. In addition, the remarkable electrical conductivity and magnetic properties of the five explored nanoferrites, derived from the present investigation, enabled them useful in several modern nanotechnological and biomedical applications.