Naslov
Magnetic properties of radiolytically synthesized iron oxide nanoparticles

Autori
Marić, Ivan ; Gotić, Marijan ; Greneche, Jean-Marc ; Zadro, Krešo ; Pustak, Anđela ; Jurkin, Tanja

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, neobjavljeni rad, znanstveni

Skup
ACS Fall Meeting 2021: Mössbauer Spectroscopy from Magnetic Nanoarchitectures to Environmental Science: A Symposium in Honor of Dr. Jean-Marc Greneche:

Mjesto i datum
Atlanta (GA), Sjedinjene Američke Države, 22.08.2021. - 26.08.2021

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
gamma-irradiation ; poly(ethylene oxide) ; magnetite ; Mössbauer spectrometry ; magnetic measurements

Sažetak
γ-irradiation is an attractive and environmentally friendly technique for the synthesis of magnetic iron oxide nanoparticles at room temperature. In this work, deaerated alkaline aqueous suspensions of iron(III) chloride were irradiated in the presence of 2- propanol and a polymer stabilizer to synthesize magnetic iron oxide nanoparticles (MIONs). We studied the effect of different polymer stabilizers (DEAE-dextran, poly(ethylene oxide)) and the effect of γ-irradiation dose on the synthesis of MIONs. The magnetic properties of the samples were studied by SQUID magnetometry and 57Fe Mössbauer spectrometry, and their structural and morphological properties were analyzed by XRD and electron microscopy. The samples showed significantly different phase compositions, morphologies and exhibited superparamagnetic behavior even at very low temperatures, depending on the polymer and absorbed dose. In-field Mössbauer spectrometry showed that the samples exhibited spin-canting phenomenon, presumably at the nanoparticle surface. Acknowledgments: This work has been supported by the Croatian Science Foundation under the project UIP-2017-05-7337 (POLRADNANOP).

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA