Synthesis, morphology and optical characterisation of transition metal oxide (Mn₃O₄) nanostructures and its antibacterial activities
by Syed Asif Ali Naqvi; Ghulam Mustafa; Junaid Kareem Khan; Syed Masood Raza; Saima Faraz; Zaheer Uddin
International Journal of Nanotechnology (IJNT), Vol. 19, No. 12, 2022

Abstract: We studied the chemical growth of Mn₃O₄ nanostructures by employing the co-precipitation method. The size of the nanoparticles of the Mn₃O₄ sample through XRD was found to be 17-34 nm. By optical characterisation of Mn₃O₄, in addition three sub-band gaps were found. It shows fractionalised band gaps followed by Schottky barriers, which would have different bandgap energies. It is related to fractional quantum behaviour and quantum jumps. EDX shows the exact percentages of elements that verify the Mn₃O₄ nanoparticles percentile. SEM results show Penrose like structures with cylindrical entanglement, web, and granules morphology pores in each of the four different sizes of the granules. Mn₃O₄ nanoparticles also show antibacterial activities. The suppression of growth of Staphylococcus aureus, Enterococcus faecalis, Escherichia coli, and Citrobacter sp was observed, showing antimicrobials potential of manganese oxide nanoparticles. The optimal antibacterial concentration for Mn₃O₄ manganese oxide nanoparticles was found to be 400 ug/discs.

Online publication date: Sat, 25-Mar-2023

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