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The Ellipticity Measurements - Determination of the Size of Superparamagnetic Core of Magnetic Metal Nanoparticles

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dc.abstract.enFerrofluids, i.e., suspensions of magnetic nanoparticles, find numerous applications in biomedicine, catalysis,and optical technologies. In this work we introduce a novel and easy-to-handle way of measuring the diameterof the unoxidised core using the Faraday effect and the induced ellipticity of the light. The effects are basedon the optical activity of material induced by magnetic field parallel to the direction of the propagation of thelaser beam. For the spherical superparamagnetic inclusions (nanoparticles) suspended in a diamagnetic mediuma theoretical model is applied. It enables one to determine the magnetic momentum of a single nanoparticle, andthus its diameter that is in coincidence with the statistical analysis of transmission electron microscopy images.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorWójcik, M.
dc.contributor.authorGrempka, A.
dc.contributor.authorPiętka, Barbara
dc.contributor.authorSzczytko, Jacek
dc.date.accessioned2024-01-26T10:11:50Z
dc.date.available2024-01-26T10:11:50Z
dc.date.issued2020
dc.description.financePublikacja bezkosztowa
dc.description.number3
dc.description.volume137
dc.identifier.doi10.12693/APHYSPOLA.137.417
dc.identifier.issn0587-4246
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/122228
dc.identifier.weblinkhttp://dx.doi.org/10.12693/aphyspola.137.417
dc.languageeng
dc.pbn.affiliationphysical sciences
dc.relation.ispartofActa Physica Polonica A
dc.relation.pages417-420
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.titleThe Ellipticity Measurements - Determination of the Size of Superparamagnetic Core of Magnetic Metal Nanoparticles
dc.typeJournalArticle
dspace.entity.typePublication