title: Sonochemical synthesis of monodispersed magnetite nanoparticles by using an ethanol-water mixed solvent.
abstract: The magnetite nanoparticles were synthesized in an ethanol-water solution under ultrasonic irradiation from a Fe(OH)(2) precipitate. XRD, TEM, TG, IR, VSM and UV/vis absorption spectrum were used to characterize the magnetite nanoparticles. It was found that the formation of magnetite was accelerated in ethanol-water solution in the presence of ultrasonic irradiation, whereas, it was limited in ethanol-water solution under mechanical stirring. The monodispersibility of magnetite particles was improved significantly through the sonochemical synthesis in ethanol-water solution. The magnetic properties were improved for the samples synthesized under ultrasonic irradiation. This would be attributed to high Fe(2+) concentration in the magnetite cubic structure.
authors.affiliation: Department of Applied Chemistry, Faculty of Engineering, Kyushu University, Fukuoka 819-0395, Japan.
authors.forename: Feng
authors.initials: F
authors.lastname: Dang
authors.forename: Naoya
authors.initials: N
authors.lastname: Enomoto
authors.forename: Junichi
authors.initials: J
authors.lastname: Hojo
authors.forename: Keiji
authors.initials: K
authors.lastname: Enpuku
mesh_terms: D000431:Ethanol / Q000737:chemistry*; D052203:Ferrosoferric Oxide / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D046529:Microscopy, Electron, Transmission; D010084:Oxidation-Reduction; D010316:Particle Size; D012997:Solvents / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013696:Temperature; D014465:Ultrasonics; D014867:Water / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D012997:Solvents; D014867:Water; D000431:Ethanol; D052203:Ferrosoferric Oxide