pH-dependent magnetic phase transition of iron oxide nanoparticles synthesized by gamma-radiation reduction method

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

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In this study, the influence of pH variation on structural and magnetic phase transition of gamma radiolytic synthesized iron oxide nanoparticles is investigated. The structure and magnetic properties of irradiated samples are characterized using X-ray diffraction, Fourier transfer infrared spectroscopy, transmission electron microscopy, and vibrating sample magnetometer. It was found that, in acidic irradiated solution, Fe3+ ions make various complexes with polyvinyl alcohol and water molecules which exhibit a multiphase magnetic property as a mixture of dia and paramagnetic materials. On the other hand, in basic condition, rate of radiation induced reduction of Fe3+ ions increased which leads to the formation of superparamagnetic Fe 3O4 nanoparticles. By increasing pH value, in strong basic condition, the tendency of paramagnetic iron (III) oxy-hydroxide formation was high compared to other phases. This variation in the magnetic properties was explained based on iron ions reduction mechanism and the variation of the ligands' properties during formation of nanoparticles under irradiation.

Original languageEnglish
Pages (from-to)399-407
Number of pages9
JournalJournal of Radioanalytical and Nuclear Chemistry
Volume301
Issue number2
DOIs
Publication statusPublished - 2014

Fingerprint

Phase Transition
Gamma Rays
Iron oxides
Gamma rays
Nanoparticles
Magnetic properties
Phase transitions
Ions
Paramagnetic materials
Iron
Polyvinyl Alcohol
Polyvinyl alcohols
Magnetometers
Transmission Electron Microscopy
X-Ray Diffraction
Infrared spectroscopy
Spectrum Analysis
Ligands
Irradiation
Radiation

Keywords

  • Gamma-radiation reduction method
  • Iron oxide nanoparticles
  • Magnetic phase transition
  • pH value

ASJC Scopus subject areas

  • Analytical Chemistry
  • Nuclear Energy and Engineering
  • Health, Toxicology and Mutagenesis
  • Pollution
  • Public Health, Environmental and Occupational Health
  • Spectroscopy
  • Radiology Nuclear Medicine and imaging

Cite this

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title = "pH-dependent magnetic phase transition of iron oxide nanoparticles synthesized by gamma-radiation reduction method",
abstract = "In this study, the influence of pH variation on structural and magnetic phase transition of gamma radiolytic synthesized iron oxide nanoparticles is investigated. The structure and magnetic properties of irradiated samples are characterized using X-ray diffraction, Fourier transfer infrared spectroscopy, transmission electron microscopy, and vibrating sample magnetometer. It was found that, in acidic irradiated solution, Fe3+ ions make various complexes with polyvinyl alcohol and water molecules which exhibit a multiphase magnetic property as a mixture of dia and paramagnetic materials. On the other hand, in basic condition, rate of radiation induced reduction of Fe3+ ions increased which leads to the formation of superparamagnetic Fe 3O4 nanoparticles. By increasing pH value, in strong basic condition, the tendency of paramagnetic iron (III) oxy-hydroxide formation was high compared to other phases. This variation in the magnetic properties was explained based on iron ions reduction mechanism and the variation of the ligands' properties during formation of nanoparticles under irradiation.",
keywords = "Gamma-radiation reduction method, Iron oxide nanoparticles, Magnetic phase transition, pH value",
author = "Alam Abedini and Daud, {Abdul Razak} and {Abdul Hamid}, {Muhammad Azmi} and Othman, {Norinsan Kamil}",
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TY - JOUR

T1 - pH-dependent magnetic phase transition of iron oxide nanoparticles synthesized by gamma-radiation reduction method

AU - Abedini, Alam

AU - Daud, Abdul Razak

AU - Abdul Hamid, Muhammad Azmi

AU - Othman, Norinsan Kamil

PY - 2014

Y1 - 2014

N2 - In this study, the influence of pH variation on structural and magnetic phase transition of gamma radiolytic synthesized iron oxide nanoparticles is investigated. The structure and magnetic properties of irradiated samples are characterized using X-ray diffraction, Fourier transfer infrared spectroscopy, transmission electron microscopy, and vibrating sample magnetometer. It was found that, in acidic irradiated solution, Fe3+ ions make various complexes with polyvinyl alcohol and water molecules which exhibit a multiphase magnetic property as a mixture of dia and paramagnetic materials. On the other hand, in basic condition, rate of radiation induced reduction of Fe3+ ions increased which leads to the formation of superparamagnetic Fe 3O4 nanoparticles. By increasing pH value, in strong basic condition, the tendency of paramagnetic iron (III) oxy-hydroxide formation was high compared to other phases. This variation in the magnetic properties was explained based on iron ions reduction mechanism and the variation of the ligands' properties during formation of nanoparticles under irradiation.

AB - In this study, the influence of pH variation on structural and magnetic phase transition of gamma radiolytic synthesized iron oxide nanoparticles is investigated. The structure and magnetic properties of irradiated samples are characterized using X-ray diffraction, Fourier transfer infrared spectroscopy, transmission electron microscopy, and vibrating sample magnetometer. It was found that, in acidic irradiated solution, Fe3+ ions make various complexes with polyvinyl alcohol and water molecules which exhibit a multiphase magnetic property as a mixture of dia and paramagnetic materials. On the other hand, in basic condition, rate of radiation induced reduction of Fe3+ ions increased which leads to the formation of superparamagnetic Fe 3O4 nanoparticles. By increasing pH value, in strong basic condition, the tendency of paramagnetic iron (III) oxy-hydroxide formation was high compared to other phases. This variation in the magnetic properties was explained based on iron ions reduction mechanism and the variation of the ligands' properties during formation of nanoparticles under irradiation.

KW - Gamma-radiation reduction method

KW - Iron oxide nanoparticles

KW - Magnetic phase transition

KW - pH value

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