Synthesis and characterization of perovskite type of La1-xBaxMnO3 nanoparticles with investigation of biological activity

Abstract The enhanced biological activity of perovskite type La1-xBaxMnO3 (x = 0.2, 0.3, 0.4) nanoparticle was studied based on antioxidant, antimicrobial, anti-biofilm, bacterial viability inhibition, and DNA cleavage studies. The nanoparticles were prepared by Sol-gel technique and they were analyzed on structure and morphological by XRD and SEM. La0.6Ba0.4MnO3 showed the highest DPPH free radical scavenging activity and iron chelating activity as 67.23% and 46.54%, respectively. All tested lanthanum nanoparticles showed good chemical nuclease activity. C. tropicalis was the most affected species by lanthanum nanoparticles and MIC values were 4 µg/mL, 8 µg/mL, and 16 µg/mL for La0.7Ba0.4MnO3, La0.6Ba0.4MnO3, and La0.8Ba0.2MnO3, respectively. La0.7Ba0.4MnO3 exhibited the highest percentage of biofilm inhibition against P. aeruginosa and S. aureus as 99.78% and 98.38%, respectively. Cell viability assay demonstrated that La0.7Ba0.4MnO3, La0.6Ba0.4MnO3, and La0.8Ba0.2MnO3 showed %100 cell viability inhibition after 30 and 60 min treatment.