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Title: Small-angle X-ray scattering spectra of iron-based magnetic fluids
Authors: Supagorn Rugmai
Chitnarong Sirisathitkul
Komkrich Chokprasombat
Prawet Rangsanga
Phimphaka Harding
Toemsak Srikhirin
Pongsakorn Jantaratana
Suranaree University of Technology
Walailak University
Mahidol University
Kasetsart University
Keywords: Materials Science
Issue Date: 1-Jul-2012
Citation: Materiali in Tehnologije. Vol.46, No.4 (2012), 369-373
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.
ISSN: 15803414
Appears in Collections:Scopus 2011-2015

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