Influence of growth conditions on magnetite nanoparticles electro-crystallized in the presence of organic molecules.
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Journal ArticleDate:
2013Access:
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Mosivand S, Monzon LM, Kazeminezhad I, Coey JM, Influence of growth conditions on magnetite nanoparticles electro-crystallized in the presence of organic molecules., International journal of molecular sciences, 14, 5, 2013, 10383-96Download Item:
ijms-14-10383.pdf (Published (publisher's copy)) 1.468Mb
Abstract:
Magnetite nanoparticles were synthesi
zed by electrocryst
allization in the
presence of thiourea or sodium butanoate as
an organic stabiliz
er. The synthesis was
performed in a thermostatic electrochemical
cell containing two iron electrodes with an
aqueous solution of sodium sulfate as electr
olyte. The effects of organic concentration,
applied potential and growth temperature
on particle size, morphology, structure and
magnetic properties were investigated. The ma
gnetite nanoparticles were characterized by
X-ray diffraction, electron microscopy, magneto
metry and Mossbauer spectrometry. When
the synthesis is performed in the presence of
sodium butanoate at 60 ?C, a paramagnetic
ferric salt is obtained as a s
econd phase; it is possible to a
void formation of this phase,
increase the specific magnetization and improve
the structure of the oxide particles by
tuning the growth conditions. Room-temperature
magnetization values range from 45 to
90 Am
2
kg
?
1
, depending on the particle
size, type of surfactant
and synthesis conditions.
Mossbauer spectra, which were recorded at
290 K for all the samples, are typical of
nonstoichiometric Fe
3
??
O
4
, with a small excess of Fe
3+
, 0.05
?
?
?
0.15.
Sponsor
Grant Number
Science Foundation Ireland (SFI)
NISE 10/IN1.I3006.
Author's Homepage:
http://people.tcd.ie/jcoeyhttp://people.tcd.ie/aranzazl
Description:
PUBLISHED
Author: COEY, JOHN; MONZON, LORENA
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Journal ArticleCollections:
Series/Report no:
International journal of molecular sciences14
5
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PhysicsSubject (TCD):
Nanoscience & MaterialsDOI:
http://dx.doi.org/10.3390/ijms140510383Licences: