Raman spectra tell us so much more: Raman features and saturation magnetization for efficient analysis of manganese zinc ferrite nanoparticles

From the past few decades, attention towards the biological evaluation of nanoparticles (NPs) has increased due to the persistent and extensive application of NPs in various fields, including biomedical science, modern industry, magnetic resonance imaging, and the construction of sensors. Therefore, in the current study, magnetic nickel ferrite (NiFe2O4) nanoparticles (NFNPs) were synthesized and evaluated for their possible adverse effects in rabbits. The crystallinity of the synthesized NFNPs was confirmed using X-ray diffraction (XRD) technique. The saturation magnetization (46.7 emug−1) was measured using vibrating sample magnetometer (VSM) and 0.35-tesla magnetron by magnetic resonance imaging (MRI). The adverse effects of NFNPs on blood biochemistry and histoarchitecture of the liver, kidneys, spleen, brain, and heart of the rabbits were determined. A total of sixteen adult rabbits, healthy and free from any apparent infection, were blindly placed in two groups. The rabbits in group A served as control, while the rabbits in group B received a single dose (via ear vein) of NFNPs for ten days. The blood and visceral tissues were collected from each rabbit at days 5 and 10 of posttreatment. The results on blood and serum biochemistry profile indicated significant variation in hematological and serum biomarkers in NFNP-treated rabbits. The results showed an increased quantity of oxidative stress and depletion of antioxidant enzymes in treated rabbits. Various serum biochemical tests exhibited significantly higher concentrations of different liver function tests, kidney function tests, and cardiac biomarkers. Histopathologically, the liver showed congestion, edema, atrophy, and degeneration of hepatocytes. The kidneys exhibited hemorrhages, atrophy of renal tubule, degeneration, and necrosis of renal tubules, whereas coagulative necrosis, neutrophilic infiltration, and severe myocarditis were seen in different sections of the heart. The brain of the treated rabbits revealed necrosis of neurons, neuron atrophy, and microgliosis. In conclusion, the current study results indicated that the highest concentration of NPs induced adverse effects on multiple tissues of the rabbits.

/pdf/hematobiochemical-oxidative-stress-and-histopathological-1m653a9i.pdf

Hematobiochemical, Oxidative Stress, and Histopathological Mediated Toxicity Induced by Nickel Ferrite (NiFe2O4) Nanoparticles in Rabbits


 In this study, the plasma arc discharge process was employed to synthesize nanocrystalline Cu0.5Ni0.5Fe2O4 ferrite powders. The formation of a spinel-type structure of ferrite has been confirmed using X-ray diffraction. X-ray diffraction analysis conclusively verified the formation of a spinel-type ferrite structure. The investigation involved studying the frequency and temperature dependence of dielectric permittivity, dielectric loss, and DC/AC conductivity over a broad frequency range (1 kHz–1 MHz) in a temperature range of 298 K–403 K. The highest value of the dielectric contestant (4746) is observed at a frequency of 1 kHz and temperature of 313 K. A maximum in the DC conductivity is observed at 403 K, which can be ascribed to the combined effects of thermally activated hopping and an increase in the concentration of both n-type and p-type charge carriers at higher temperatures.

Magnetic and Electrical Transport Properties of Cu0.5Ni0.5Fe2O4 Ferrite Synthesized by Plasma Arc Discharge Process

Hereby, we report the structural and photoluminescent properties of Sr1-xDyx-zCezAl2O4 [x = 0.03, 0.02, 0.01 and z = 0.01. 0.02 and 0.03 respectively] phosphors. The sample synthesis was successfully carried out by solid state reaction route. The crystal structure and the type of phase formed was witnessed by X-ray diffraction characterization where the spectra analysis revealed that the as synthesized samples have crystallized into the monoclinic phase with the assigned space group of P21/n. The samples were observed to have the presence of additional phase corresponding to SrCO3. The XRD results were further confirmed through the Fourier Transform Infra-Red (FTIR) characterization technique where fingerprint absorption peaks confirm the XRD results. Photoluminescent studies revealed the highly intense broad glow curve corresponding to the Ce3+ presence in SrAl2O4 matrix around 390 nm whereas the weak and broad glow curves corresponding to the Dy3+ are observed in the higher region of visible range of electromagnetic spectrum.

Structural and photoluminescent studies of SrAl2O4: Dy3+, Ce3+ phosphors

Spinel ferrite Ni0.5Cu0.5Fe2O4 has been successfully prepared via solid state reaction. The crystal structure studies using XRD technique revealed cubic structure of the sample. The XRD spectra was further refined via Retvield Refinement and all the parameters regarding structure were obtained which confirmed cubic structure. The assigned space group was found to be Fd-3m. Particle size was calculated to be 56 nm. The Raman Spectra revealed five active Raman modes which confirmed spinel structure.

The structural and Raman spectral studies on Ni0.5Cu0.5Fe2O4 ferrite

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The structural and Raman spectral studies on Ni0.5Cu0.5Fe2O4 ferrite