Abstract
Abstract Transition metal oxide nanostructures are well known as attractive multi-functional nanomaterials and are among the most promising industrial materials for different science and technology applications. The present study, describes the optical, structural, and antibacterial properties of undoped and Zn-doped CuO nanostructures synthesised by a simple low-cost sol-gel technique. The synthesised nanostructures exhibited a monoclinic CuO structure as confirmed by X-ray diffraction, Raman spectroscopy, Fourier transform infrared spectroscopy, and high-resolution transmission electron microscopy. Various Zn doping of CuO nanostructures tuned their optical, structural, morphological, and antibacterial properties. Field emission scanning electron microscopy confirmed the formation of bunched cauliflower-shaped nanostructures after Zn doping. X-ray photoelectron spectroscopy was used to study the chemical state of CuO doped with Zn and dynamic light scattering measured the hydrodynamic size of the samples. Zn-doped CuO samples exhibited excellent antibacterial activity against Escherichia coli and Staphylococcus aureus with a change in antibacterial behaviour compared to pure CuO structures. This study demonstrated the potential of using a simple synthesis methodology to produce tuneable nanostructures for multi-functional applications.
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