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Sonochemical approach to the synthesis of Fe3O4@SiO2 core−shell nanoparticles with tunable properties

hal.structure.identifierChimie Nucléaire Analytique et Bio-environnementale [CNAB]
dc.contributor.authorMOREL, Anne-Laure
hal.structure.identifierChimie Nucléaire Analytique et Bio-environnementale [CNAB]
dc.contributor.authorNIKITENKO, Sergei I.
hal.structure.identifierMécanismes moléculaires de l'angiogénèse
dc.contributor.authorGIONNET, Karine
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorWATTIAUX, Alain
dc.contributor.authorLAI-KEE-HIM, Josephine
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorLABRUGÈRE, Christine
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorCHEVALIER, Bernard
hal.structure.identifierChimie Nucléaire Analytique et Bio-environnementale [CNAB]
dc.contributor.authorDELERIS, Gérard
hal.structure.identifierChimie Nucléaire Analytique et Bio-environnementale [CNAB]
dc.contributor.authorPETIBOIS, Cyril
dc.contributor.authorBRISSON, Alain
hal.structure.identifierChimie Nucléaire Analytique et Bio-environnementale [CNAB]
dc.contributor.authorSIMONOFF, Monique
dc.date.issued2008
dc.identifier.issn1936-0851
dc.description.abstractEnIn this study, we report a rapid sonochemical synthesis of monodisperse nonaggregated Fe3O4@SiO2 magnetic nanoparticles (NPs). We found that coprecipitation of Fe(II) and Fe(III) in aqueous solutions under the effect of power ultrasound yields smaller Fe3O4 NPs with a narrow size distribution (4−8 nm) compared to the silent reaction. Moreover, the coating of Fe3O4 NPs with silica using an alkaline hydrolysis of tetraethyl orthosilicate in ethanol−water mixture is accelerated many-fold in the presence of a 20 kHz ultrasonic field. The thickness of the silica shell can be easily controlled in the range of several nanometers during sonication. Mössbauer spectra revealed that nonsuperparamagnetic behavior of obtained core−shell NPs is mostly related to the dipole−dipole interactions of magnetic cores and not to the particle size effect. Core−shell Fe3O4@SiO2 NPs prepared with sonochemistry exhibit a higher magnetization value than that for NPs obtained under silent conditions owing to better control of the deposited silica quantities as well as to the high speed of sonochemical coating, which prevents the magnetite from oxidizing.
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.subject.enMagnetite
dc.subject.enSilica
dc.subject.enCore-shell nanoparticles
dc.subject.enSonochemistry
dc.subject.enUltrasound
dc.subject.enMössbauer spectroscopy
dc.subject.enFT-IR
dc.subject.enXPS
dc.title.enSonochemical approach to the synthesis of Fe3O4@SiO2 core−shell nanoparticles with tunable properties
dc.typeArticle de revue
dc.identifier.doi10.1021/nn800091q
dc.subject.halChimie/Matériaux
bordeaux.journalACS Nano
bordeaux.page847–856
bordeaux.volume2
bordeaux.issue5
bordeaux.peerReviewedoui
hal.identifierhal-00286949
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00286949v1
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