Rapid synthesis and characterization of maghemite nanoparticles

Basit Öğe Kaydı
dc.contributor.authorTural, Bilsen
dc.contributor.authorOezenbas, Macit
dc.contributor.authorAtalay, Selcuk
dc.contributor.authorVolkan, Muervet
dc.date.accessioned2024-04-24T17:14:31Z
dc.date.available2024-04-24T17:14:31Z
dc.date.issued2008
dc.departmentDicle Üniversitesien_US
dc.descriptionInternational Workshop on Nanostructured Materials (ANAOMAT 2006) -- JUN 21-23, 2006 -- Antalya, TURKEYen_US
dc.description.abstractFe2O3-SiO2 nanocomposites were prepared by a sol-gel method using various evaporation surface to volume (S/V) ratios ranging from 0.03 to 0.2. The Fe2O3-SiO2 sols were gelated at various temperatures ranging from 50 degrees C to 70 degrees C, and subsequently they were calcined in air at 400 degrees C for 4 hours. The structure and the magnetic properties of the prepared Fe2O3-SiO2, nanocomposites were characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM), differential thermal analysis (DTA), and vibrating sample magnetometer (VSM) measurements. The gelation temperature of the Fe2O3-SiO2 sols influenced strongly the particle size and crystallinity of the maghemite nanoparticles. It was observed that the particle size of maghemite nanoparticles increased with the increasing of the gelation temperature of the sols, which may be due to the agglomeration of the maghemite particles at elevated temperatures inside the microporosity of the silica matrix during the gelation process, and the subsequent calcination of these gels at 400 degrees C resulted in the formation of large size iron oxide particles. Magnetization studies at temperatures of 10, 195, and 300 K showed superparamagnetic behavior for all the nanocomposites prepared using the evaporation surface to volume ratio (S/V) of 0.1, 0.2, 0.09, and 0.08. The saturation magnetization, Ms, values measured at 10 K were 5.5, 8.5, and 9.5 emu/g, for the samples gelated at 50, 60, and 70 degrees C, respectively. At the gelation temperature of 70 degrees C, gamma-Fe2O3 crystalline superparamagnetic nanoparticles with the particle size of 9 +/- 2 nm were formed in 12 hours for the samples prepared at the S/V ratio of 0.2.en_US
dc.description.sponsorshipNanoforum,Middle E Tech Univen_US
dc.identifier.doi10.1166/jnn.2008.B269
dc.identifier.endpage866en_US
dc.identifier.issn1533-4880
dc.identifier.issn1533-4899
dc.identifier.issue2en_US
dc.identifier.pmid18464419
dc.identifier.scopus2-s2.0-42549151148
dc.identifier.scopusqualityN/A
dc.identifier.startpage861en_US
dc.identifier.urihttps://doi.org/10.1166/jnn.2008.B269
dc.identifier.urihttps://hdl.handle.net/11468/18019
dc.identifier.volume8en_US
dc.identifier.wosWOS:000254083700061
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.language.isoenen_US
dc.publisherAmer Scientific Publishersen_US
dc.relation.ispartofJournal of Nanoscience and Nanotechnology
dc.relation.publicationcategoryKonferans Öğesi - Uluslararası - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectNanostructuresen_US
dc.subjectIron Oxidesen_US
dc.subjectMaghemiteen_US
dc.subjectSol-Gel Processingen_US
dc.subjectSize Controlen_US
dc.subjectSuper-Paramagneticen_US
dc.subjectSaturation Magnetizationen_US
dc.titleRapid synthesis and characterization of maghemite nanoparticlesen_US
dc.titleRapid synthesis and characterization of maghemite nanoparticles
dc.typeConference Objecten_US

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