Micro-wave sintered nickel doped cobalt ferrite nanoparticles prepared by hydrothermal method

Chavan, S. G.; Mane, Sagar M.; Kulkarni, S. B.; Jayasingh, Moses Ebenezer; Joshi, P. B.; Salunkhe, D. J.

doi:10.1007/s10854-016-4672-5

Cited by 14 publications

(3 citation statements)

References 18 publications

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“…The precipitate was then deposited in an oven in a hydrothermal autoclave reactor for 10 h at 200 °C. 57 The precipitates were washed many times with distilled water and 100% ethyl alcohol to remove unreacted products, then dried at 80 °C for 8 h, and calcined overnight at 500 °C for better crystallinity and magnetization. The chemical reaction is as follows: …”

Section: Methodsmentioning

confidence: 99%

Engineered Polyethylene Glycol-Coated Zinc Ferrite Nanoparticles as a Novel Magnetic Resonance Imaging Contrast Agent

Dabagh

Haris

Ertaş

2023

ACS Biomater. Sci. Eng.

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Polyethylene glycol (PEG) was utilized to functionalize the surface of zinc ferrite nanoparticles (NPs) synthesized by the hydrothermal process in order to prevent aggregation and improve the biocompatibility of the NPs for the proposed magnetic resonance imaging (MRI) agent. Various spectroscopy techniques were used to examine the NPs’ structure, size, morphology, and magnetic properties. The NPs had a cubic spinel structure with an average size of 8 nm. The formations of the spinel ferrite and the PEG coating band at the ranges of 300–600 and 800–2000 cm–1, respectively, were validated by Fourier-transform infrared spectroscopy. The NPs were spherical in shape, and energy-dispersive X-ray spectroscopy with mapping confirmed the presence of zinc, iron, and oxygen in the samples. The results of high-resolution transmission electron microscopy revealed an average size of 14 nm and increased stability after PEG coating. The decrease in zeta potential from −24.5 to −36.5 mV confirmed the PEG coating on the surface of the NPs. A high saturation magnetization of ∼50 emu/g, measured by vibration sample magnetometer, indicated the magnetic potential of NPs for biomedical applications. An MTT assay was used to examine the cytotoxicity and viability of human normal skin cells (HSF 1184) exposed to zinc ferrite and PEG@Zn ferrite NPs at various concentrations. After 24 h of treatment, negligible cytotoxicity of PEG-coated NPs was observed at high concentrations. Magnetic resonance imaging (MRI) suggested that PEG@Zn ferrite NPs are a unique and perfectly suited contrast agent for T2-weighted MRI and can successfully enhance the image contrast.

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Section: Methodsmentioning

confidence: 99%

Engineered Polyethylene Glycol-Coated Zinc Ferrite Nanoparticles as a Novel Magnetic Resonance Imaging Contrast Agent

Dabagh

Haris

Ertaş

2023

ACS Biomater. Sci. Eng.

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“…Further, the presence of Cu in Cobalt ferrite causes a reduction of 4-nitrophenol to 4-aminophenol is achieved in seconds. In case of Ni substitution Coercivity and saturation magnetization were reduced due to lowering of magneto crystallite anisotropy along with particle size [12][13]. Maintaining the stoichiometry and charge balance is another important factor to obtain optimum and reproducible Cobalt ferrite.…”

Section: Introductionmentioning

confidence: 99%

Facile Route for the Synthesis of Er Doped Nanoferrites: An Investigation on Structural, Magnetic, and Electrical Properties

Reddy

Rao

Babu

et al. 2023

J Inorg Organomet Polym

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In this work, Er 3+ doped Cobalt Nanoferrite particles CoEr x Fe 2−x O 4 (x = 0.0, 0.01, 0.03, 0.05) were synthesized using optimized citrate-gel auto-combustion method and analyzed for Humidity sensor applications. Preliminary X-ray diffraction and Raman spectroscopic studies and con rm the formation of single-phase spinel structure. Average crystallite sizes from Williamson-Hall method are in the range 28 nm to 32 nm, which are in close agreement with TEM data. Temperature dependent magnetization ZFC-FC curves shows above room temperature blocking temperature. Hysteresis loops obtained by vibrating sample magnetometry clearly enhances the magnetization of cobalt ferrite. Electrical resistance measurements in different relative humidity conditions (RH 10-95%) and frequencies were done using a High Frequency LCR Meter. Er doped Cobalt ferrite samples shows a decrease in electrical resistance and improved sensitivity compared to the pure ones. The variation of Resistance with respect to humidity conditions suggested that Er doped Cobalt ferrite nanoparticles are potentially suitable for resistive humidity sensor applications.

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“…They have reported the greater value of magnetocapacitance MD=5.37% at 1 KHz frequency and magnetic field of 1.5T for x=0.4. Various chemical methods can be used for the synthesis of MF composites like sol-gel method, [23] co-precipitation method, [24] hydrothermal method, [25] etc.…”

Section: Introductionmentioning

confidence: 99%

Electrical Conductivity and Modulus Studies of x [CNFO]-(1-x) [0.5BCT-0.5BZT] Multiferroic with Dielectric, Magnetic and Magneto-dielectric Properties

Kakade¹,

Deshpande²,

Kulkarni³

2021

Eng. Sci.

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x [Co0.9Ni0.1Fe2O4]-(1-x) [0.5Ba0.7Ca0.3TiO3-0.5BaZr0.2Ti0.8O3] multiferroic composite was formed by hydroxide co-precipitation method for x = 0.3, 0.4 & 0.5. X-ray diffractometer (XRD) and Scanning Electron Microscopy (SEM) were used for the structural and morphological studies of these composites respectively. Perovskite phase of the ferroelectric material and spinel phase of the ferrite were confirmed by the XRD spectra. Impedance analyzer was used to study the dielectric properties of the composite. Dielectric constant and tangent loss (Quality factor) variation of the composites were investigated for 100 Hz to 1 MHz frequency. Increase in magnetocapacitance was observed with increasing magnetic field up to 1 Tesla. Magnetodielectric (MD) effect of the composites can be explained on the basis of contribution of interfacial polarization to dielectric constant which depends on magnetic field and variation in dielectric constant produced by induced stress. Alternating current (Ac) conductivity of the materials which depends on the frequency follows Jonscher's universal power law. These materials shows Arrhenius behavior which can be confirmed by temperature dependent dc conductivity. Modulus studies gives strong peaks which shifts towards higher frequency with increasing temperature. Saturation magnetization of composites increases as Co0.9Ni0.1Fe2O4 (CNFO) content in the composite increases.

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Micro-wave sintered nickel doped cobalt ferrite nanoparticles prepared by hydrothermal method

Cited by 14 publications

References 18 publications

Engineered Polyethylene Glycol-Coated Zinc Ferrite Nanoparticles as a Novel Magnetic Resonance Imaging Contrast Agent

Engineered Polyethylene Glycol-Coated Zinc Ferrite Nanoparticles as a Novel Magnetic Resonance Imaging Contrast Agent

Facile Route for the Synthesis of Er Doped Nanoferrites: An Investigation on Structural, Magnetic, and Electrical Properties

Electrical Conductivity and Modulus Studies of x [CNFO]-(1-x) [0.5BCT-0.5BZT] Multiferroic with Dielectric, Magnetic and Magneto-dielectric Properties

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