title: Preparation of Fe3O4 encapsulated-silica sulfonic acid nanoparticles and study of their in vitro antimicrobial activity.
abstract: A simple and efficient method for the functionalization of silica-coated Fe3O4 magnetic nanoparticles (Fe3O4@SiO2) using chlorosulfonic acid is described. The prepared compounds were screened for antibacterial activity against Escherichia coli (E. coli ATCC 25922) and Staphylococcus aureus (S. aureus ATCC 25923) under UV-light and dark conditions. It was found that the Fe3O4@SiO2-SO3H was significantly indicated the higher photocatalytic inactivation than both Fe3O4 and Fe3O4@SiO2 against E. coli in compared with S. aureus. Furthermore, the inactivation efficiency against both organisms under light conditions has been higher than this efficiency under dark conditions.
authors.affiliation: Department of Organic Chemistry, Faculty of Chemistry, University of Kashan, Kashan 87317, Islamic Republic of Iran. Electronic address: naeimi@kashanu.ac.ir.
authors.forename: Hossein
authors.initials: H
authors.lastname: Naeimi
authors.affiliation: Department of Organic Chemistry, Faculty of Chemistry, University of Kashan, Kashan 87317, Islamic Republic of Iran; Department of Chemistry, Shahreza Branch, Islamic Azad University, Shahreza, Isfahan 86145-311, Islamic Republic of Iran.
authors.forename: Zahra Sadat
authors.initials: ZS
authors.lastname: Nazifi
authors.affiliation: Department of Chemistry, Shahreza Branch, Islamic Azad University, Shahreza, Isfahan 86145-311, Islamic Republic of Iran.
authors.forename: Seyedeh Matin
authors.initials: SM
authors.lastname: Amininezhad
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry* / Q000494:pharmacology*; D002214:Capsules; D002384:Catalysis; D003624:Darkness; D004926:Escherichia coli / Q000187:drug effects / Q000502:physiology / Q000528:radiation effects; D058185:Magnetite Nanoparticles / Q000737:chemistry*; D050296:Microbial Viability / Q000187:drug effects / Q000528:radiation effects; D055668:Photochemical Processes; D012822:Silicon Dioxide / Q000737:chemistry*; D013211:Staphylococcus aureus / Q000187:drug effects / Q000502:physiology / Q000528:radiation effects; D013451:Sulfonic Acids / Q000737:chemistry*; D014466:Ultraviolet Rays
chemical_list: D000900:Anti-Bacterial Agents; D002214:Capsules; D058185:Magnetite Nanoparticles; D013451:Sulfonic Acids; C013880:chlorosulfonic acid; D012822:Silicon Dioxide
keywords: Antimicrobial activity; Magnetic nanoparticle; Nano-Fe(3)O(4); Sulfonic acid-functionalized; UV-light