Synthesis and characterization of size-controlled cobalt-ferrite-based ionic ferrofluids

Morais, P.C.; Garg, V. K.; Oliveira, A. C.; Silva, L.P.; Azevedo, Ricardo Bentes; Silva, A.M.L.; Lima, E.C.D.

doi:10.1016/s0304-8853(00)01225-7

Cited by 157 publications

(76 citation statements)

References 7 publications

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“…Jeyadevan et al 17 successfully prepared nearly monodispersed single-domain Nickel ferrite particles, which could be used for the high-density recording media. Morais et al 18 reported the possibility of controlling the size of nanoparticles using different stirring speeds. Temperature sensitive magnetic fluid having Ni 0.3 Zn 0.7 Fe 2 O 4 particles was used for the study of thermal convection 10 .…”

Section: Introductionmentioning

confidence: 99%

Synthesis of nickel zinc iron nanoparticles by coprecipitation technique

2010

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Nanoparticles nickel ferrite of size 6 -8 nm, synthesized by the coprecipitation method with x varying from 0 to 1.0. The powder samples were characterized by XRD, VSM and FTIR. The average crystallite sizes of the particles were determined from X-ray diffraction. X-ray analysis showed that the samples were cubic spinel. The lattice constant (a o ) increased with the increase in zinc substitution. The specific saturation magnetization (M S ) of the particles was measured at room temperature. The magnetic parameter of M S , was found to decrease with the increase in zinc substitution. Fourier transform infrared spectroscopy (FTIR) spectra of the Ni 1-x Zn x Fe 2 O 4 with x = 0, 0.5, 1 in the range 400 -4000 cm -1 were reported. The spinel structure and the crystalline water adsorption of Ni 1-x Zn x Fe 2 O 4 nanoparticles were studied by using FTIR.

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Section: Introductionmentioning

confidence: 99%

Synthesis of nickel zinc iron nanoparticles by coprecipitation technique

2010

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“…Various methods, including co-precipitation [7,8], hydrothermal synthesis [9,10], sol-gel techniques [11], microemulsion method [12,13], forced hydrolysis method [14] and sonochemical reaction [15], have been reported for preparing CoFe 2 O 4 . Most of these methods suffer with troublesome post-treatment and cannot be applied to a large-scale and economic production.…”

Section: Introductionmentioning

confidence: 99%

Dependence of magnetic properties on crystallite size of CoFe₂O₄nanoparticles synthesised by auto-combustion method

Liu

Zhang

Feng

et al. 2009

Journal of Experimental Nanoscience

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Cobalt ferrite (CoFe 2 O 4 ) nanoparticles were prepared through an auto-combustion method. The results of XRD show that the crystallite size of CoFe 2 O 4 nanoparticles increases from 57 to 105 nm with a slight change in lattice constant as the annealing temperature increases from 300 to 1200 C. The magnetic measurements by vibrating sample magnetometer (VSM) show that M s increases monotonously by increasing the annealing temperature from 300 to 1200 C and C hB and M s reached a maximum when annealing temperature is about 400 C due to the change of the grain size.

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“…Since selol presented with a positive charge 20 and ionic magnetic fluids prepared in low pH also presented with positively-charged nanoparticles, 30 the coencapsulation of both selol and maghemite nanoparticles overcame the negative charge of PLGA. Moreover, the presence of maghemite nanoparticles at the outer surface of MSE-NC, as observed by TEM, contributed to the net positive charge found in the zeta potential data.…”

Section: Discussionmentioning

confidence: 99%

Co-nanoencapsulation of magnetic nanoparticles and selol for breast tumor treatment: in vitro evaluation of cytotoxicity and magnetohyperthermia efficacy

Estevanato

Silva²,

Falqueiro³

et al. 2012

IJN

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Antitumor activities have been described in selol, a hydrophobic mixture of molecules containing selenium in their structure, and also in maghemite magnetic nanoparticles (MNPs). Both selol and MNPs were co-encapsulated within poly(lactic-co-glycolic acid) (PLGA) nanocapsules for therapeutic purposes. The PLGA-nanocapsules loaded with MNPs and selol were labeled MSE-NC and characterized by transmission and scanning electron microscopy, electrophoretic mobility, photon correlation spectroscopy, presenting a monodisperse profile, and positive charge. The antitumor effect of MSE-NC was evaluated using normal (MCF-10A) and neoplastic (4T1 and MCF-7) breast cell lines. Nanocapsules containing only MNPs or selol were used as control. MTT assay showed that the cytotoxicity induced by MSE-NC was dose and time dependent. Normal cells were less affected than tumor cells. Cell death occurred mainly by apoptosis. Further exposure of MSE-NC treated neoplastic breast cells to an alternating magnetic field increased the antitumor effect of MSE-NC. It was concluded that selol-loaded magnetic PLGA-nanocapsules (MSE-NC) represent an effective magnetic material platform to promote magnetohyperthermia and thus a potential system for antitumor therapy.

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Synthesis and characterization of size-controlled cobalt-ferrite-based ionic ferrofluids

Cited by 157 publications

References 7 publications

Synthesis of nickel zinc iron nanoparticles by coprecipitation technique

Synthesis of nickel zinc iron nanoparticles by coprecipitation technique

Dependence of magnetic properties on crystallite size of CoFe₂O₄nanoparticles synthesised by auto-combustion method

Co-nanoencapsulation of magnetic nanoparticles and selol for breast tumor treatment: in vitro evaluation of cytotoxicity and magnetohyperthermia efficacy

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Synthesis and characterization of size-controlled cobalt-ferrite-based ionic ferrofluids

Cited by 157 publications

References 7 publications

Synthesis of nickel zinc iron nanoparticles by coprecipitation technique

Synthesis of nickel zinc iron nanoparticles by coprecipitation technique

Dependence of magnetic properties on crystallite size of CoFe2O4nanoparticles synthesised by auto-combustion method

Co-nanoencapsulation of magnetic nanoparticles and selol for breast tumor treatment: in vitro evaluation of cytotoxicity and magnetohyperthermia efficacy

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Dependence of magnetic properties on crystallite size of CoFe₂O₄nanoparticles synthesised by auto-combustion method