X Li
Nanostructural and magnetic studies of virtually
monodispersed NiFe2O4 nanocrystals synthesized
by a liquid–solid-solution assisted hydrothermal route
Li, X; Tan, G; Chen, W; Zhou, B; Xue, D; Peng, Y; Li, F; Mellors, N.J.
Authors
G Tan
W Chen
B Zhou
D Xue
Y Peng
F Li
N.J. Mellors
Abstract
This study presents a comprehensively
and systematically structural, chemical and magnetic
characterization of *9.5 nm virtually monodispersed
nickel ferrite (NiFe2O4) nanoparticles prepared using
a modified liquid–solid-solution (LSS) assisted hydrothermal
method. Lattice-resolution scanning transmission
electron microscope (STEM) and converged
beam electron diffraction pattern (CBED) techniques
are adapted to characterize the detailed spatial morphology
and crystal structure of individual NiFe2O4
particles at nano scale for the first time. It is found that
each NiFe2O4 nanoparticle is single crystal with an fcc
structure. The morphology investigation reveals that
the prepared NiFe2O4 nanoparticles of which the
surfaces are decorated by oleic acid are dispersed
individually in hexane. The chemical composition of
nickel ferrite nanoparticles is measured to be 1:2
atomic ratio of Ni:Fe, indicating a pure NiFe2O4
composition. Magnetic measurements reveal that the
as-synthesized nanocrystals displayed superparamagnetic
behavior at room temperature and were ferromagnetic
at 10 K. The nanoscale characterization and
magnetic investigation of monodispersed NiFe2O4
nanoparticles should be significant for its potential
applications in the field of biomedicine and magnetic
fluid using them as magnetic materials.
Citation
by a liquid–solid-solution assisted hydrothermal route. Journal of Nanoparticle Research, 14(751), https://doi.org/10.1007/s11051-012-0751-6
| Journal Article Type | Article |
|---|---|
| Publication Date | Jan 18, 2012 |
| Deposit Date | Feb 21, 2012 |
| Journal | Journal of Nanoparticle Research |
| Print ISSN | 1388-0764 |
| Publisher | Springer Verlag |
| Peer Reviewed | Peer Reviewed |
| Volume | 14 |
| Issue | 751 |
| DOI | https://doi.org/10.1007/s11051-012-0751-6 |
| Publisher URL | http://dx.doi.org/10.1007/s11051-012-0751-6 |