Radiolytic formation of Fe3O4 nanoparticles: Influence of radiation dose on structure and magnetic properties

Alam Abedini, Abdul Razak Daud, Muhammad Azmi Abdul Hamid, Norinsan Kamil Othman

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Colloidal Fe3O4 nanoparticles were synthesized using a gamma-radiolysis method in an aqueous solution containing iron chloride in presence of polyvinyl alcohol and isopropanol as colloidal stabilizer and hydroxyl radical scavenger, respectively. Gamma irradiation was carried out in a 60Co gamma source chamber at different absorbed doses. Increasing the radiation dose above a certain critical dose (100 kGy) leads to particle agglomeration enhancement, and this can influence the structure and crystallinity, and consequently the magnetic properties of the resultant particles. The optimal condition for formation of Fe3O4 nanoparticles with a uniform and narrow size distribution occurred at a dose of 100 kGy, as confirmed by X-ray diffractometry and transmission electron microscopy. A vibrating sample magnetometry study showed that, when radiation dose increased, the saturation and remanence magnetization decreased, whereas the coercivity and the remanence ratio increased. This magnetic behavior results from variations in crystallinity, surface effects, and particle size effects, which are all dependent on the radiation dose. In addition, Fourier transform infrared spectroscopy was performed to investigate the nature of the bonds formed between the polymer chains and the metal surface at different radiation doses.

Original languageEnglish
Article numbere90055
JournalPLoS One
Volume9
Issue number3
DOIs
Publication statusPublished - 7 Mar 2014

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magnetic properties
magnetite
nanoparticles
Nanoparticles
Dosimetry
Magnetic properties
Radiation
dosage
Magnetometry
Remanence
Polyvinyl Alcohol
2-Propanol
Fourier Transform Infrared Spectroscopy
Transmission Electron Microscopy
Particle Size
Hydroxyl Radical
Chlorides
polyvinyl alcohol
Radiolysis
absorbed dose

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Medicine(all)

Cite this

Radiolytic formation of Fe3O4 nanoparticles : Influence of radiation dose on structure and magnetic properties. / Abedini, Alam; Daud, Abdul Razak; Abdul Hamid, Muhammad Azmi; Othman, Norinsan Kamil.

In: PLoS One, Vol. 9, No. 3, e90055, 07.03.2014.

Research output: Contribution to journalArticle

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