Non-Aqueous Sol-Gel Synthesis of FePt Nanoparticles in the Absence of In Situ Stabilizers

Nanomaterials
Tobias PrellerG Garnweitner

Abstract

The synthesis of FePt nanocrystals is typically performed in an organic solvent at rather high temperatures, demanding the addition of the in situ stabilizers oleic acid and oleylamine to produce monomodal particles with well-defined morphologies. Replacing frequently-used solvents with organic media bearing functional moieties, the use of the stabilizers can be completely circumvented. In addition, various morphologies and sizes of the nanocrystals can be achieved by the choice of organic solvent. The kinetics of particle growth and the change in the magnetic behavior of the superparamagnetic FePt nanocrystals during the synthesis with a set of different solvents, as well as the resulting morphologies and stoichiometries of the nanoparticles were determined by powder X-ray diffraction (PXRD), small-angle X-ray scattering (SAXS), transmission electron microscopy (TEM), inductively coupled plasma optical emission spectroscopy (ICP-OES)/mass spectrometry (ICP-MS), and superconducting quantum interference device (SQUID) measurements. Furthermore, annealing of the as-prepared FePt nanoparticles led to the ordered L1₀ phase and, thus, to hard magnetic materials with varying saturation magnetizations and magnetic coercivities.

References

Jul 9, 2004·Journal of the American Chemical Society·Min ChenShouheng Sun
Aug 24, 2006·Chemistry : a European Journal·Markus Niederberger, Georg Garnweitner
Aug 7, 2008·Journal of the American Chemical Society·Jinhao GaoBing Xu
Jun 25, 2010·Journal of the American Chemical Society·Shang-Wei ChouChia-Chun Chen
Feb 22, 2012·Nanoscale Research Letters·Abolfazl AkbarzadehSoodabeh Davaran
Dec 3, 2014·Journal of Controlled Release : Official Journal of the Controlled Release Society·K M SeemannT E Schmid

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Citations

Feb 12, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Tobias PrellerGeorg Garnweitner

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Methods Mentioned

BETA
X-ray

Software Mentioned

PCG
GIFT

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