Effects of sintering on structural and magnetic properties of Cu substituted cobalt–nickel mixed ferrite nano particles

Balavijayalakshmi, J.; Suriyanarayanan, N.; Jayaprakash, R.

doi:10.1016/j.jmmm.2014.03.005

Cited by 18 publications

(5 citation statements)

References 13 publications

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“…Thus, their aggregation in vivo can be avoided. 20 This clear advantage has made MNPs more and more attractive for in vivo applications, such as magnetic resonance imaging (MRI), 21,22 drugs and genes delivery, cancer treatment, hard tissue repair, 23,24 tissue engineering, biosensors 25 and other aspects, [26][27][28][29][30] which are shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Current investigations into magnetic nanoparticles for biomedical applications

Jiang

Aifantis

et al. 2016

J Biomedical Materials Res

272

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: Introductionmentioning

confidence: 99%

Current investigations into magnetic nanoparticles for biomedical applications

Jiang

Aifantis

et al. 2016

J Biomedical Materials Res

272

166

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“…The variation in wave numbers (ϑ 1 & ϑ 2 ) with copper concentration(x) for all samples is shown in Figure 3. From the figure, it has been observed that both ϑ 1 and ϑ 2 shift towards lower frequencies with copper concentration (x) due to sintering on the samples 11 . The values of the force constants (K T and K O ) for the band Fe 3+ -O 2at tetrahedral and octahedral sites are calculated using the relation 12 .…”

Section: Resultsmentioning

confidence: 96%

FT-IR Studies of Cu Substituted Ni-Zn Ferrites for Structural and Vibrational Investigations

2015

Chem Sci Trans

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Polycrystalline ferrite samples having a chemical formula Ni 0.7-x Cu x Zn 0.3 Fe 2 O 4 (where x=0.05 to 0.50 insteps of 0.05 variation) was prepared through the conventional ceramic method. The infra red spectra were recorded at the room temperature using FT-IR spectra for all samples in the range 4000 cm-1 to 400 cm-1 on MAGNA 550 Nicollet Instruments Corporation; the absorption spectra recorded 400 cm-1 to 4000 cm-1. The spectrum recorded transmittance (%) versus wave number (cm-1) and the spectrum confirms the spinel structure. The study of FT-IR spectra is very important tool for getting the ions positions in the lattice.

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“…15,16 Stoichiometric amounts of NiCl 2 · 6H 2 O, ZnCl 2 and FeCl 3 ·6H 2 O were dissolved in bi-distilled water. The solutions of these salts in their stoichiometry (100 ml of 0.05 M NiCl 2 · 6H 2 O, 100 ml of 0.05 M ZnCl 2 , 100 ml of 0.2 M FeCl 3 ·6H 2 O, in the case of Ni 0.5 Zn 0.5 Fe 2 O 4 and similarly for the other values of x) were mixed with continuous stirring.…”

Section: Methodsmentioning

confidence: 99%

Synthesis, characterization and magnetic properties of nanocrystalline Ni_1-xZn_xFe₂O₄ spinels via coprecipitation precursor

Maklad

Shash

Abdelsalam

2014

Int. J. Mod. Phys. B

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Nanocrystalline Ni 1−x ZnxFe 2 O 4 (0.0 ≤ x ≤ 1.0) spinels are synthesized with a crystallite size range 5-2.2 nm, using different annealing temperatures. The influence of zinc content as well as grain size of ferrite on the ferrite microstructure, therefore on the physical properties of ferrite, are investigated by means of X-ray diffraction (XRD), scanning electron microscope (SEM), atomic force microscope (AFM), thermal analysis (TG, DTG, DSC) and infrared microscopy (IR). XRD results confirm single phase spinel structure for ferrite with Zn content x = 0.1 whereas second phase appears in higher zinc content ferrites. Thermal analysis shows an endothermic peak at ∼ 720 • C-750 • C reveals the removal of defective surface layer existed on the surface of ferrite grains, which leads to cation redistribution. This is supported by the shift observed in IR bands as a result of the increase in zinc content or calcination temperature. Ferrite with composition Ni 0.7 Zn 0.3 Fe 2 O 4 calcined at 1000 • C has the maximum saturation magnetization Ms among various compositions at different calcination temperatures. The Ms and the coercivity Hc of the ferrites nanoparticles are different from their corresponding bulk, which attributes to a defective surface layer, controlling the ultrafine particle behavior.

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Effects of sintering on structural and magnetic properties of Cu substituted cobalt–nickel mixed ferrite nano particles

Cited by 18 publications

References 13 publications

Current investigations into magnetic nanoparticles for biomedical applications

Current investigations into magnetic nanoparticles for biomedical applications

FT-IR Studies of Cu Substituted Ni-Zn Ferrites for Structural and Vibrational Investigations

Synthesis, characterization and magnetic properties of nanocrystalline Ni_1-xZn_xFe₂O₄ spinels via coprecipitation precursor

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Effects of sintering on structural and magnetic properties of Cu substituted cobalt–nickel mixed ferrite nano particles

Cited by 18 publications

References 13 publications

Current investigations into magnetic nanoparticles for biomedical applications

Current investigations into magnetic nanoparticles for biomedical applications

FT-IR Studies of Cu Substituted Ni-Zn Ferrites for Structural and Vibrational Investigations

Synthesis, characterization and magnetic properties of nanocrystalline Ni1-xZnxFe2O4 spinels via coprecipitation precursor

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Synthesis, characterization and magnetic properties of nanocrystalline Ni_1-xZn_xFe₂O₄ spinels via coprecipitation precursor