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Electrochemical synthesis of magnetic iron oxide nanoparticles with controlled size
magnetic nanoparticles
iron oxide
maghemite
magnetite
electrochemical synthesis
We present a novel and facile method enabling synthesis of iron oxide nanoparticles, which are composed mainly of maghemite according to X-ray diffraction (XRD) and Mössbauer spectroscopy studies. The proposed process is realized by anodic iron polarization in deaerated LiCl solutions containing both water and ethanol. Water seems to play an important role in the synthesis. Morphology of the product was studied by means of transmission electron microscopy and XRD. In the solution containing almost 100% of water a black suspension of round shaped maghemite nanoparticles of 20–40 nm size is obtained. Regulating water concentration allows to control nanoparticle size, which is reduced to 4–6 nm for 5% of water with a possibility to reach intermediate sizes. For 3% or lower water concentration nanoparticles are of a needle-like shape and form a reddish suspension. In this case phase determination is problematic due to a small particle size with the thickness of roughly 3 nm. However, XRD studies indicate the presence of ferrihydrite. Coercivities of the materials are similar to those reported for nanoparticle magnetite powders, whereas the saturation magnetization values are considerably smaller.
dc.abstract.en | We present a novel and facile method enabling synthesis of iron oxide nanoparticles, which are composed mainly of maghemite according to X-ray diffraction (XRD) and Mössbauer spectroscopy studies. The proposed process is realized by anodic iron polarization in deaerated LiCl solutions containing both water and ethanol. Water seems to play an important role in the synthesis. Morphology of the product was studied by means of transmission electron microscopy and XRD. In the solution containing almost 100% of water a black suspension of round shaped maghemite nanoparticles of 20–40 nm size is obtained. Regulating water concentration allows to control nanoparticle size, which is reduced to 4–6 nm for 5% of water with a possibility to reach intermediate sizes. For 3% or lower water concentration nanoparticles are of a needle-like shape and form a reddish suspension. In this case phase determination is problematic due to a small particle size with the thickness of roughly 3 nm. However, XRD studies indicate the presence of ferrihydrite. Coercivities of the materials are similar to those reported for nanoparticle magnetite powders, whereas the saturation magnetization values are considerably smaller. | |
dc.affiliation | Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiego | |
dc.contributor.author | Starowicz, Maria | |
dc.contributor.author | Starowicz, Paweł - 100653 | |
dc.contributor.author | Żukrowski, Jan | |
dc.contributor.author | Przewoźnik, Janusz | |
dc.contributor.author | Lemański, Andrzej | |
dc.contributor.author | Kapusta, Czesław | |
dc.contributor.author | Banaś, Jacek | |
dc.date.accessioned | 2024-10-03T09:31:23Z | |
dc.date.available | 2024-10-03T09:31:23Z | |
dc.date.issued | 2011 | |
dc.date.openaccess | 0 | |
dc.description.accesstime | w momencie opublikowania | |
dc.description.number | 12 | |
dc.description.physical | 7167-7176 | |
dc.description.version | ostateczna wersja wydawcy | |
dc.description.volume | 13 | |
dc.identifier.doi | 10.1007/s11051-011-0631-5 | |
dc.identifier.eissn | 1572-896X | |
dc.identifier.issn | 1388-0764 | |
dc.identifier.uri | https://ruj.uj.edu.pl/handle/item/449841 | |
dc.language | eng | |
dc.language.container | eng | |
dc.rights | Udzielam licencji. Uznanie autorstwa - Użycie niekomercyjne 2.0 | |
dc.rights.licence | CC-BY-NC | |
dc.rights.uri | http://creativecommons.org/licenses/by-nc/2.0/legalcode | |
dc.share.type | inne | |
dc.subject.en | magnetic nanoparticles | |
dc.subject.en | iron oxide | |
dc.subject.en | maghemite | |
dc.subject.en | magnetite | |
dc.subject.en | electrochemical synthesis | |
dc.subtype | Article | |
dc.title | Electrochemical synthesis of magnetic iron oxide nanoparticles with controlled size | |
dc.title.journal | Journal of Nanoparticle Research | |
dc.type | JournalArticle | |
dspace.entity.type | Publication | en |