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HomeKey Engineering MaterialsKey Engineering Materials Vol. 605Experimental and First Principles'...

Experimental and First Principles' Characterization of Functionalized Magnetic Nanoparticles

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Abstract:

Magnetic iron oxide nanoparticles synthesized via co precipitation and thermal decomposition yielded largely monodisperse size distributions. Both methods produced a mixture of magnetite and maghemite. However CP NPs were indexed as magnetite-rich while TD yielded largely maghemite NPs. XRD-and TEM-measured diameters of the co-precipitated particles were approximately between 9 to 15 nm, while thermally decomposed diameters were in the range of 8 to 10 nm. FTIR spectra revealed no distinct differences in the bulk structure of the two systems. Based on the Density functional theory calculations and on HOMO-LUMO gap energies, we propose that ferric Fe is the state of preference by the surfactant in bidentate linkage.

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Materials and Applications for Sensors and Transducers III

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Periodical:

Key Engineering Materials (Volume 605)

Pages:

681-684

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.605.681

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Online since:

April 2014

Authors:

E. Statharas, P. Tserotas, G.S.E. Antipas

Keywords:

Ab Initio IR, Co Precipitation, Maghemite, Magnetic Nanoparticles, Magnetite, Oleic Acid, Thermal Decomposition

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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