Sizing and Eddy currents in magnetic core nanoparticles: an optical extinction approach

cic.isFulltexttruees
cic.isPeerReviewedtruees
cic.lugarDesarrolloCentro de Investigaciones Ópticases
dc.date.accessioned2018-05-16T17:47:04Z
dc.date.available2018-05-16T17:47:04Z
dc.identifier.urihttps://digital.cic.gba.gob.ar/handle/11746/7444
dc.titleSizing and Eddy currents in magnetic core nanoparticles: an optical extinction approachen
dc.typeArtículoes
dcterms.abstractOptical extinction is a handy and ubiquitous technique that allows us to study colloidal nanoparticles in their native state. The typical analysis of the extinction spectrum can be extended in order to obtain structural information of the sample such as the size distribution of the cores and the thickness of the coating layers. In this work the extinction spectra of Fe3O4, Fe3O4@Au, and Fe3O4@SiO2@Au single and multilayer nanoparticles are obtained by solving full Mie theory with a frequency dependent susceptibility derived from the Gilbert equation and considering the effect of Eddy currents. The results are compared with non-magnetic Mie theory, magnetic dipolar approximation and magnetic Mie theory without Eddy currents. The particle size-wavelength ranges of validity of these different approaches are explored and novel results are obtained for Eddy current effects in optical extinction. These results are used to obtain particle size and shell thickness information from the experimental extinction spectra of Fe3O4 and Fe3O4@Au nanoparticles in good agreement with TEM results, and to predict the plasmon peak parameters for Fe3O4@SiO2@Au three layer nanoparticles.en
dcterms.creator.authorMendoza Herrera, Luis Joaquínes
dcterms.creator.authorBruvera, Ignacioes
dcterms.creator.authorScaffardi, Lucía Beatrizes
dcterms.creator.authorSchinca, Daniel Carloses
dcterms.extent9 p.es
dcterms.identifier.otherdoi:10.1039/C6CP08260Bes
dcterms.identifier.urlRecurso onlinees
dcterms.isPartOf.issueno. 4es
dcterms.isPartOf.seriesPhysical Chemistry Chemical Physicses
dcterms.issued2017-02
dcterms.languageIngléses
dcterms.licenseAttribution-NonCommercial-NoDerivatives 4.0 International (BY-NC-ND 4.0)*
dcterms.subjectMie Theoryen
dcterms.subjectEddy currentsen
dcterms.subjectMagnetiteen
dcterms.subjectSize determineden
dcterms.subject.materiaFísico-Química, Ciencia de los Polímeros, Electroquímicaes
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