Iron oxide nano-material: physicochemical traits and in vitro antibacterial propensity against multidrug resistant bacteria

[Display omitted] •FeO-Nps synthesis from ferric chloride using A. indica.L extract as a reducing agent.•FeO-NPs stability, magnetic, conductivity and photocatalytic traits were examined.•Antioxidant efficiency of FeO-Nps was found to be 95% of inhibition against DPPH.•FeO Nps have virtuous propensity against gram negative than gram positive bacteria.•FeO NPs can apply as an effective material from clinical to environmental application. The synthesis of Azadirachta indica leaf extract mediated Iron oxide nanoparticles (FeO-NPs) from ferric chloride were investigated. The characterization results confirmed that FeO-NPs were having good physicochemical traits. The FeO-NPs hold the resistance in ohmic range and coercivity value reached 126emu/g. The FeO-Nps antioxidant efficiency was observed to be 95% of inhibition against 1, 1-diphenyl-2-picrylhydrazyl. The indigo-carmine dye decolourization of 79 and 85% under sunlight and UV-light irradiance were attained for FeO-NPs. The antibacterial and antibiofilm activities of FeO-NPs against bacterial pathogen were tested. The results confirmed that FeO-NPs have a virtuous propensity against gram negative than positive bacteria.