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Please use this identifier to cite or link to this item: https://olympias.lib.uoi.gr/jspui/handle/123456789/16796
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dc.contributor.authorDouvalis, A. P.en
dc.contributor.authorZboril, R.en
dc.contributor.authorBourlinos, A. B.en
dc.contributor.authorTucek, J.en
dc.contributor.authorSpyridi, S.en
dc.contributor.authorBakas, T.en
dc.date.accessioned2015-11-24T18:33:45Z-
dc.date.available2015-11-24T18:33:45Z-
dc.identifier.issn1388-0764-
dc.identifier.urihttps://olympias.lib.uoi.gr/jspui/handle/123456789/16796-
dc.rightsDefault Licence-
dc.subjectBorohydrideen
dc.subjectCore-shellen
dc.subjectFerrihydriteen
dc.subjectMagnetic nanoparticlesen
dc.subjectMagnetization measurementsen
dc.subjectMossbauer spectroscopyen
dc.subjectBorohydridesen
dc.subjectFerrihydritesen
dc.subjectChemical modificationen
dc.subjectIronen
dc.subjectIron alloysen
dc.subjectIron oxidesen
dc.subjectMagnetic fieldsen
dc.subjectMagnetizationen
dc.subjectMolybdenumen
dc.subjectNanomagneticsen
dc.subjectNanoparticlesen
dc.subjectOrganic solventsen
dc.subjectShells (structures)en
dc.subjectSuperparamagnetismen
dc.subjectTransmission electron microscopyen
dc.subjectX ray powder diffractionen
dc.subjectSynthesis (chemical)en
dc.subjectalloyen
dc.subjectcobalten
dc.subjectferric hydroxideen
dc.subjectiron oxideen
dc.subjectmagnetic nanoparticleen
dc.subjectnickelen
dc.subjectsodium derivativeen
dc.subjectarticleen
dc.subjectchemical compositionen
dc.subjectchemical structureen
dc.subjectdegradationen
dc.subjectmagnetic fielden
dc.subjectoxidationen
dc.subjectparticle sizeen
dc.subjectpriority journalen
dc.subjectreductionen
dc.subjectroom temperatureen
dc.subjectsubstitution reactionen
dc.subjectsynthesisen
dc.subjectX ray fluorescenceen
dc.titleA facile synthetic route toward air-stable magnetic nanoalloys with Fe-Ni/Fe-Co core and iron oxide shellen
heal.typejournalArticle-
heal.type.enJournal articleen
heal.type.elΆρθρο Περιοδικούel
heal.identifier.secondaryhttp://www.scopus.com/inward/record.url?eid=2-s2.0-84867026587&partnerID=40&md5=08f2b30f928721c45cadc0613222aaeb-
heal.accesscampus-
heal.recordProviderΠανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιώνel
heal.publicationDate2012-
heal.abstractAir-stable bimetallic spherically shaped Fe-Ni and Fe-Co magnetic nanoparticles (MNPs), having an average size of 15 nm and core-shell structure, were synthesized by a simple wet chemical method under ambient conditions. For the first time, sodium borohydride reduction method, commonly applied for the syntheses of metal nanoparticles, was used for the preparation of well-defined Fe-Ni and Fe- Co nanoalloys, avoiding exploitation of any organic solvent. This approach allows a large scale production of nanoparticles specifically stabilized by an iron oxyhydroxide shell without a need of secondary functionalization. Transmission electron microscopy, X-ray powder diffraction, X-ray fluorescence, magnetization, and M?ssbauer data demonstrate a core- shell nature of the as-synthesized nanoparticles. The nanoparticle core is of metallic origin and is inhomogeneous at the atomic level, consisting of iron-rich and iron-poor alloy phases. The composition of the shell is close to the ferrihydrite and its role lies in prevention of oxidation-induced degradation of nanoparticle properties. The core is ferromagnetic at and below room temperature, experiencing superparamagnetic relaxation effects due to a reduced size of nanoparticles, whereas the shell is completely superparamagnetic at 300 K and magnetically orders below?25 K. Both developed types of magnetic nanoalloys exhibit a strong magnetic response under applied magnetic fields with a high magnetization values achievable at relatively low applied magnetic fields. Beside this, the highly biocompatible chemical composition of the nanoparticle shell and ability of its chemical modification by substitution or addition of other ions or molecules further empower the application potential of these MNPs, especially in the field of biomedicine. © Springer Science+Business Media B.V. 2012.en
heal.journalNameJournal of Nanoparticle Researchen
heal.journalTypepeer reviewed-
heal.fullTextAvailabilityTRUE-
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