title: Antibacterial activity of magnetic iron oxide nanoparticles synthesized by laser ablation in liquid.
abstract: In this study, (50-110 nm) magnetic iron oxide (α-Fe2O3) nanoparticles were synthesized by pulsed laser ablation of iron target in dimethylformamide (DMF) and sodium dodecyl sulfate (SDS) solutions. The structural properties of the synthesized nanoparticles were investigated by using Fourier Transform Infrared (FT-IR) spectroscopy, UV-VIS absorption, scanning electron microscopy (SEM), atomic force microscopy (AFM), and X-ray diffraction (XRD). The effect of laser fluence on the characteristics of these nanoparticles was studied. Antibacterial activities of iron oxide nanoparticles were tested against Gram-positive; Staphylococcus aureus and Gram-negative; Escherichia coli, Pseudomonas aeruginosa and Serratia marcescens. The results showed a noteworthy inhibition on both bacterial strains. The preparation conditions were found to affect significantly the antibacterial activity of these nanoparticles. The synthesized magnetic nanoparticles were used to capture rapidly S. aureus bacteria under the magnetic field effect.
authors.affiliation: Laser Physics Division, Applied Science Department, University of Technology, Baghdad, Iraq. Electronic address: raidismail@yahoo.com.
authors.forename: Raid A
authors.initials: RA
authors.lastname: Ismail
authors.affiliation: Biotechnology Division, Applied Science Department, University of Technology, Baghdad, Iraq.
authors.forename: Ghassan M
authors.initials: GM
authors.lastname: Sulaiman
authors.affiliation: Laser Physics Division, Applied Science Department, University of Technology, Baghdad, Iraq.
authors.forename: Safa A
authors.initials: SA
authors.lastname: Abdulrahman
authors.affiliation: Biotechnology Division, Applied Science Department, University of Technology, Baghdad, Iraq.
authors.forename: Thorria R
authors.initials: TR
authors.lastname: Marzoog
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry* / Q000494:pharmacology*; D003102:Colloids; D053844:Lasers, Solid-State; D058185:Magnetite Nanoparticles / Q000737:chemistry*; D036103:Nanotechnology; D013211:Staphylococcus aureus / Q000187:drug effects / Q000302:isolation & purification
chemical_list: D000900:Anti-Bacterial Agents; D003102:Colloids; D058185:Magnetite Nanoparticles
keywords: Anti-bacterial; Gram-negative bacteria; Gram-positive; Nanoparticles; Pulsed laser ablation in liquid