Publication: Small-angle X-ray scattering spectra of iron-based magnetic fluids
Issued Date
2012-07-01
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ISSN
15803414
15802949
15802949
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2-s2.0-84865503573
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Mahidol University
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SCOPUS
Bibliographic Citation
Materiali in Tehnologije. Vol.46, No.4 (2012), 369-373
Suggested Citation
Supagorn Rugmai, Chitnarong Sirisathitkul, Komkrich Chokprasombat, Prawet Rangsanga, Phimphaka Harding, Toemsak Srikhirin, Pongsakorn Jantaratana Small-angle X-ray scattering spectra of iron-based magnetic fluids. Materiali in Tehnologije. Vol.46, No.4 (2012), 369-373. Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/14376
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Title
Small-angle X-ray scattering spectra of iron-based magnetic fluids
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Abstract
Two types of superparamagnetic nanoparticles, namely magnetite (Fe 3 0 4 ) and iron-platinum (FePt), with their surface modified by oleic acid and oleyleamine were synthesized using the the polyol process and dispersed in n-hexane. Vibrating-sample magnetometry (VSM) was used to characterize the FePt and the magnetic susceptibility of the Fe 3 O 4 was measured as a function of magnetic field and frequency at room temperature. Synchrotron, small-angle, X-ray scattering (SAXS) patterns revealed the polydispersity of the magnetic nanoparticles with average radii below 5 nm. As confirmed by transmission electron microscopy (TEM) images and dynamic light scattering (DLS), the Fe 3 0 4 nanoparticles had a larger average size. The DLS measurement gave larger radii than those obtained from the SAXS because of the effect of aggregates and surfactants.