The effect of polyvinyl alcohol (PVA) coating on structural, magnetic properties and spin dynamics of Ni0.3Zn0.7Fe2O4 ferrite nanoparticles

Rahimi, Mohammadhosein; Kameli, P.; Ranjbar, M.; Salamati, H.

doi:10.1016/j.jmmm.2013.08.004

Cited by 51 publications

(15 citation statements)

References 38 publications

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“…Rahimi et al have studied the effect of polyvinyl alcohol surface passivation of Ni 0.3 Zn 0.7 Fe 2 O 4 ferrite nanoparticles on the loss power density and sensitivity to magnetic field frequency. 75 Their results indicated that the magnetic interactions and particle size could affect the sensitivity of nanoparticles to magnetic field frequency. This result is important for controlling the generated heat by MNPs in hyperthermia.…”

Section: In Cancer Therapymentioning

confidence: 99%

Current investigations into magnetic nanoparticles for biomedical applications

Jiang

Aifantis

et al. 2016

J Biomedical Materials Res

275

166

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It is generally recognized that nanoparticles possess unique physicochemical properties that are largely different from those of conventional materials, specifically the electromagnetic properties of magnetic nanoparticles (MNPs). These properties have attracted many researchers to launch investigations into their potential biomedical applications, which have been reviewed in this article. First, common types of MNPs were briefly introduced. Then, the biomedical applications of MNPs were reviewed in seven parts: magnetic resonance imaging (MRI), cancer therapy, the delivery of drugs and genes, bone and dental repair, tissue engineering, biosensors, and in other aspects, which indicated that MNPs possess great potentials for many kinds of biomedical applications due to their unique properties. Although lots of achievements have been obtained, there is still a lot of work to do. New synthesis techniques and methods are still needed to develop the MNPs with satisfactory biocompatibility. More effective methods need to be exploited to prepare MNPs-based composites with fine microstructures and high biomedical performances. Other promising research points include the development of more appropriate techniques of experiments both in vitro and in vivo to detect and analyze the biocompatibility and cytotoxicity of MNPs and understand the possible influencing mechanism of the two properties. More comprehensive investigations into the diagnostic and therapeutic applications of composites containing MNPs with "core-shell" structure and deeper understanding and further study into the properties of MNPs to reveal their new biomedical applications, are also described in the conclusion and perspectives part.

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Section: In Cancer Therapymentioning

confidence: 99%

Current investigations into magnetic nanoparticles for biomedical applications

Jiang

Aifantis

et al. 2016

J Biomedical Materials Res

275

166

View full text Add to dashboard Cite

show abstract

“…It can be seen that these values are higher in the coated sample compared to the bare sample. The M s value of the coated sample (35 emu/g) is higher than the bare sample (32 emu/g) at an applied field of ± 20,000 G at 300 K. Higher M s values have also been reported for poly vinyl alcohol (PVA)-coated Ni 0.3 Zn 0.7 Fe 2 O 4 MNPs (Rahimi et al 2013) and Gd-substituted NiCa ferrite/PVA nanocomposite (Prasad and Dolia 2012) systems. The increase in magnetization of the coated sample is probably due to the nanoparticles' crystal growth after polymer coating and spin injection or anti-spin canting being transpired at the surfaces of the MNPs due to the interaction with polymer chain (Prasad and Dolia 2012).…”

Section: Magnetic Propertiesmentioning

confidence: 87%

“…Dorniani et al (2014) reported improvement in the thermal stability of both polyethylene glycol-gallic acid and polyvinyl alcoholgallic acid coated SPIONs compared to their uncoated counterparts. Polyvinyl alcohol coatings on Ni 0.3 Zn 0.7 Fe 2-O 4 nanoparticles were found to increase the relative sensibilities of the samples to the variation of applied frequency (enhancing their hyperthermia-based therapy applications) compared to the uncoated samples (Rahimi et al 2013).…”

Section: Introductionmentioning

confidence: 98%

Synthesis, Magneto-structural Properties and Colloidal Stability Studies of Ni0.3Zn0.7Fe2O4 Nanoparticles Coated with Pluronic P123 Block Copolymer for Potential Biomedical Applications

Ehi-Eromosele

Ita

Iweala

2018

Iran J Sci Technol Trans Sci

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Spinel Ni 0.3 Zn 0.7 Fe 2 O 4 (NZFO) magnetic nanoparticles was prepared by the low temperature auto-combustion method using a glycine fuel-rich composition without any further heat treatment at high temperature. Subsequently, the synthesized MNPs were coated with Pluronic P123 (PP123) after its surface was functionalized with oleic acid (OA). The effect of the coatings on the morphology, structural and magnetic properties of NZFO nanoparticles was studied using powder X-ray diffraction (XRD), Fourier transform infrared, thermogravimetric analysis, field emission scanning electron microscopy (FE-SEM) and vibrating sample magnetometer (VSM). The colloidal behaviour of coated MNPs in physiological saline medium like water or phosphate buffer saline (PBS) was also studied by zeta potential measurements. XRD results showed the formation of cubic spinel crystalline phase with and without OA-PP123 coatings. Also, after OA-PP123 coating, the crystallite size (from Scherrer formula) decreases from 55 to 53 nm. However, an enlargement in the particle size and a reduction in agglomeration were observed from FE-SEM results when the nanoparticles were coated with OA-PP123. VSM measurements showed ferromagnetic behaviour at room temperature before and after coating. The colloidal stability study of the coated sample revealed a considerable high zeta potential value at physiological pH (7.4) highlighting its potential biomedical applications.

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“…Numerous reports in the literature have described magnetic nano-particles that have been modified by certain reagents to reduce agglomeration. Examples include polyvinyl alcohol, [39] dextran, [40] lauric acid, [41] etc. Moreover, Xia et al [42] prepared spinel ferrites from CoFe 2 O 4 -carboxymethyl cellulose (CMC) composite materials (CMC-CoFe 2 O 4 ), which took advantage of the characteristics of linear CMC.…”

Section: Introductionmentioning

confidence: 99%

Preparation, characterization, and phosphate removal and recovery of magnetic MnFe₂O₄nano-particles as adsorbents

Xia

et al. 2015

Environmental Technology

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Phosphate removal is an important method for controlling eutrophication in bodies of water. Adsorption is an effective phosphate removal approach. In this research, the adsorbent, namely, MnFe2O4, was prepared through the improved co-precipitation method and investigated in terms of phosphate removal. MnFe2O4 was characterized by scanning electron microscopy, vibrating sample magnetometry, X-ray diffraction, and Fourier transform infrared spectroscopy. Phosphate adsorption by MnFe2O4, desorption of adsorbed MnFe2O4 with the regeneration of desorbed MnFe2O4, and phosphate recovery were researched. Experimental results showed that adding the appropriate amount of polyethylene glycol to MnFe2O4 precursors during preparation inhibited the agglomeration of MnFe2O4 between particles because of the magnetic property of MnFe2O4 etc. High crystallinity and strong magnetism were achieved by MnFe2O4 at low temperatures. Average particle size was 5.1 nm. The hysteresis loops confirmed the ferrimagnetic behaviour of MnFe2O4 with a high saturation magnetization (i.e. 26.27 emu/g). The adsorption mechanism of phosphate was mainly physical. The prepared MnFe2O4 had a spinel structure. The proposed technique achieved a phosphate removal rate of 96.06%. A considerable amount of phosphate was desorbed from the adsorbed MnFe2O4 in 15 w/v% NaOH solution. The adsorption capacity of the desorbed MnFe2O4 could be restored to 96.73% in 10 w/v% NaNO3 solution through ion exchange. A sustainable phosphate source was recovered via hydroxyapatite crystallization in the desorption solution, which contained an abundant amount of phosphate as seed for suitable recovery condition. This finding suggested that MnFe2O4 could be a promising adsorbent for efficient phosphate removal.

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The effect of polyvinyl alcohol (PVA) coating on structural, magnetic properties and spin dynamics of Ni0.3Zn0.7Fe2O4 ferrite nanoparticles

Cited by 51 publications

References 38 publications

Current investigations into magnetic nanoparticles for biomedical applications

Current investigations into magnetic nanoparticles for biomedical applications

Synthesis, Magneto-structural Properties and Colloidal Stability Studies of Ni0.3Zn0.7Fe2O4 Nanoparticles Coated with Pluronic P123 Block Copolymer for Potential Biomedical Applications

Preparation, characterization, and phosphate removal and recovery of magnetic MnFe₂O₄nano-particles as adsorbents

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The effect of polyvinyl alcohol (PVA) coating on structural, magnetic properties and spin dynamics of Ni0.3Zn0.7Fe2O4 ferrite nanoparticles

Cited by 51 publications

References 38 publications

Current investigations into magnetic nanoparticles for biomedical applications

Current investigations into magnetic nanoparticles for biomedical applications

Synthesis, Magneto-structural Properties and Colloidal Stability Studies of Ni0.3Zn0.7Fe2O4 Nanoparticles Coated with Pluronic P123 Block Copolymer for Potential Biomedical Applications

Preparation, characterization, and phosphate removal and recovery of magnetic MnFe2O4nano-particles as adsorbents

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Preparation, characterization, and phosphate removal and recovery of magnetic MnFe₂O₄nano-particles as adsorbents