title: Sonochemical synthesis of versatile hydrophilic magnetite nanoparticles.
abstract: Hydrophilic magnetite nanoparticles in the size range 30-10nm are easily and rapidly prepared under ultrasonic irradiation of Fe(OH)(2) in di- and tri-ethylene glycol/water solution with volume ratio varying between 7:3 and 3:7. Structural (XRD) and morphological (SEM) characterization reveal good crystalline and homogeneous particles whereas, when solvothermally prepared, the particles are inhomogeneous and aggregated. The sonochemically prepared particles are versatile, i.e. well suited to covalently bind molecules because of the free glycol hydroxylic groups on their surface or exchange the diethylene or triethylene glycol ligand. They can be easily transferred in hydrophobic solvents too. Room-temperature magnetic hysteresis properties measured by means of Vibrating Sample Magnetometer (VSM) display a nearly superparamagnetic character. The sonochemical preparation is easily scalable to meet industrial demand.
authors.affiliation: ISM - CNR, Area della Ricerca di Roma 1, Via Salaria km 29.500, 00015 Monterotondo Scalo, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Marchegiani
authors.forename: P
authors.initials: P
authors.lastname: Imperatori
authors.forename: A
authors.initials: A
authors.lastname: Mari
authors.forename: L
authors.initials: L
authors.lastname: Pilloni
authors.forename: A
authors.initials: A
authors.lastname: Chiolerio
authors.forename: P
authors.initials: P
authors.lastname: Allia
authors.forename: P
authors.initials: P
authors.lastname: Tiberto
authors.forename: L
authors.initials: L
authors.lastname: Suber
mesh_terms: D052203:Ferrosoferric Oxide / Q000138:chemical synthesis* / Q000737:chemistry; D057927:Hydrophobic and Hydrophilic Interactions; D053758:Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D013499:Surface Properties; D014465:Ultrasonics
chemical_list: D052203:Ferrosoferric Oxide