Abstract
High purity Ni and Gd co-doped ZnO nanoparticles were synthesized by the chemical precipitation method and their structural, optical and antibacterial activity has been investigated using EDX, SEM, UV–Vis analysis, XRD and inhibition zone assay. The prepared nanoparticles have a lower band gap than the bulk ZnO. The red-shifted band gap was observed due to the addition of the dopant Gd. High refractive index has been observed at high Gd doping concentration. The prepared nanoparticles were of p-type in nature and the hole concentration increases as the doping concentration of Gd increases. The structural properties investigated by the X-ray diffraction technique reveal the formation of a hexagonal wurtzite structure. The change in crystallite size from 33 to 62 nm with simultaneous decrease in texture coefficient from 1.23 to 1.20 was observed when the Gd doping concentration increases from 0 to 15%. The prepared nanoparticles have been found to have antibacterial activity against Escherichia coli and Staphylococcus aureus and the doping did not enhance the activity against Pseudomonas aeruginosa.
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Acknowledgements
The authors would like to acknowledge Department of Physics, The Gandhigram Rural Institute, Gandhigram, India, Department of Physics, Anna University, Chennai, India and Department of Zoology, Gargi College, New Delhi, India, for providing all the research facilities and support to carry out the research work.
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All authors contributed to the study conception and design. Material preparation and analysis was performed by “L. Bruno Chandrasekar” and “A. Murugeswari”. The first draft of the manuscript was written by “L. Bruno Chandrasekar” and all authors contributed and commented to improve the presentation of results in the manuscript. All authors read and approved the final manuscript.
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Chandrasekar, L.B., Anandhan, N., Murugeswari, A. et al. Influence of Gd-doping on physical properties of Zn1−x−yNiyGdxO nanoparticles and its antibacterial activity. Indian J Phys (2024). https://doi.org/10.1007/s12648-024-03185-5
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DOI: https://doi.org/10.1007/s12648-024-03185-5