Antibacterial effect of lanthanum calcium manganate (La0.67Ca0.33MnO3) nanoparticles against Pseudomonas aeruginosa ATCC 27853.

Nanotechnology based water purification system and treatment of human diseases are of higher priority in the immediate future for economic and undetermined health purpose. Nanoparticles offer the possibility of an efficient removal of pollutants and microbes in water treatment. Here we have used colossal magnetoresistance (CMR) materials, lanthanum calcium manganate (LCMO) and Eu3+ doped lanthanum calcium manganate (LECMO) nanoparticles, to determine the antibacterial efficacy against Pseudomonas aeruginosa-ATCC 27853, a soil and water born pathogenic bacteria. The average size of the synthesized nanoparticles was varied from 50 nm to 200 nm and X-ray diffraction pattern showed the formation of a single phase LCMO or LECMO of an orthorhombic crystal structure after annealing the precursor at 1000 degrees C for 2 h in air. The data revealed that LCMO nanoparticle have higher antibacterial activity compared to LECMO nanoparticle. Thus, LCMO nanoparticles can offer future applications as antimicrobial drug and in water purification technology.