Microstructural and optical properties of Ca and Cr doped cobalt ferrite nanoparticles synthesized by auto combustion

2018 ◽  
Author(s):  
Shraddha Agrawal ◽  
Azra Parveen ◽  
Ameer Azam
Keyword(s):  
Optical Properties ◽  
Cobalt Ferrite ◽  
Ferrite Nanoparticles ◽  
Cobalt Ferrite Nanoparticles ◽  
Auto Combustion

scholarly journals Innovative Gold/Cobalt Ferrite Nanocomposite: Physicochemical and Cytotoxicity Properties

Processes ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 2264
Author(s):  
Anna Motorzhina ◽  
Sonja Jovanović ◽  
Victor K. Belyaev ◽  
Dmitry Murzin ◽  
Stanislav Pshenichnikov ◽  
...  
Keyword(s):  
Optical Properties ◽  
Cobalt Ferrite ◽  
Mononuclear Cells ◽  
Lymphoblastic Leukemia ◽  
Metal Oxide Nanoparticles ◽  
Ferrite Nanoparticles ◽  
Peripheral Blood Mononuclear ◽  
Plasmonic Material ◽  
Cobalt Ferrite Nanoparticles ◽  
Photothermal Treatment

The combination of plasmonic material and magnetic metal oxide nanoparticles is widely used in multifunctional nanosystems. Here we propose a method for the fabrication of a gold/cobalt ferrite nanocomposite for biomedical applications. The composite includes gold cores of ~10 nm in diameter coated with arginine, which are surrounded by small cobalt ferrite nanoparticles with diameters of ~5 nm covered with dihydrocaffeic acid. The structure and elemental composition, morphology and dimensions, magnetic and optical properties, and biocompatibility of new nanocomposite were studied. The magnetic properties of the composite are mostly determined by the superparamagnetic state of cobalt ferrite nanoparticles, and optical properties are influenced by the localized plasmon resonance in gold nanoparticles. The cytotoxicity of gold/cobalt ferrite nanocomposite was tested using T-lymphoblastic leukemia and peripheral blood mononuclear cells. Studied composite has selective citotoxic effect on cancerous cells while it has no cytotoxic effect on healtly cells. The results suggest that this material can be explored in the future for combined photothermal treatment and magnetic theranostic.

scholarly journals Structural, morphological and electronic properties of cadmium cobalt ferrite nanoparticles

2019 ◽  
Vol 10 (1) ◽  
pp. 4752-4763
Keyword(s):  
Electron Microscopy ◽  
Cobalt Ferrite ◽  
Combustion Method ◽  
Ferrite Nanoparticles ◽  
Morphological Properties ◽  
X Ray ◽  
Cobalt Ferrite Nanoparticles ◽  
Auto Combustion ◽  
Diffraction Patterns ◽  
P Type

Cadmium cobalt ferrite nanoparticles with a chemical formula of CdxCo1-xFe2O4 (x = 0.0, 0.1, 0.2, 0.3, 0.4, 0.5 & 0.6) (CCF) were prepared via the citrate-gel auto combustion method followed by annealing at 773 Kelvin for 4 hrs in air. Further, the samples were characterized for structural, morphological, elemental, functional group, electrical and thermoelectric properties analysis. The X-ray diffraction patterns showed the single phase cubic structure. The crystalline size of the synthesized Co-Cd ferrites nanoparticle is found in the range of 11 to17 nm. In addition, with an increase of Cd content, we noticed that lattice constants (a) and x-ray density (dx) values were increasing from 0.8419 – 0.8496 nm and 5.222 – 5.777 g/c.c., respectively. Morphological properties were examined by scanning electron microscopy (SEM) & Transmission electron microscopy (TEM). The tetrahedral (υ1) and octahedral (υ2) frequencies were observed at around 400 - 600 cm-1. The electric and dielectric properties such as DC-electrical conductivity (σdc), dielectric constant (ε'), dielectric loss (ε") and thermoelectric power parameters were calculated. At a low temperature of 300 K, the samples express the p-type semiconducting nature due to having +ve value of ‘S’ while the same shows –ve value at high temperature suggesting the n-type semiconducting behavior. Moreover, the magnetic Curie-transition temperatures were determined as a function of composition and noted to be decreasing from 753 – 653 K respectively.

Magnetic Properties of Dysprosium-Doped Cobalt Ferrite Nanoparticles Synthesized by Starch-Assisted Sol-Gel Auto-combustion Method

2015 ◽  
Vol 28 (7) ◽  
pp. 2097-2107 ◽  
Author(s):  
Raghvendra Singh Yadav ◽  
Jaromir Havlica ◽  
Ivo Kuřitka ◽  
Zuzana Kozakova ◽  
Martin Palou ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Cobalt Ferrite ◽  
Sol Gel ◽  
Combustion Method ◽  
Ferrite Nanoparticles ◽  
Cobalt Ferrite Nanoparticles ◽  
Auto Combustion
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