A structural, elastic, mechanical, spectroscopic, thermodynamic, and magnetic properties of polymer coated CoFe2O4 nanostructures for various applications

The polymer coated CoFe2O4 nanoparticles were prepared at 80 degrees C by co-precipitation route. X-ray diffraction (XRD) pattern of as-prepared samples confirmed formation of cobalt ferrite. The morphology of the samples was investigated by Transmission electron microscopy (TEM) showing nanoparticles of different shape and size with average particle size of 13.4 +/- 2.2, 5.1 +/- 1.8 and 11.2 +/- 2.3 nm for CF-PEG, CF-PVA and CF-PVP respectively. Elastic moduli of as-prepared samples were estimated on the basis of tetrahedral and octahedral site appears in FTIR spectroscopy. Isotropic nature of polycrystals of as-prepared samples was investigated by estimating the universal anisotropic index A(U) = 0, bulk anisotropic index A(B) = 0, shear anisotropic indexA(G) = 0, Zener anisotropic parameter A(z) = 1 and Elastic anisotropic parameter gamma = 0. Thermodynamic property of as-prepared samples was investigated by evaluating the thermal conductivity which shows slightly decrease in CF-PVA sample. The magnetization of as-prepared samples in presence applied magnetic field of (+/- 7T) was recorded and correlated with particle size of the sample. The spin canting angle was founded to be higher for CF-PVA compared to CF-PVP and CF-PEG sample. (C) 2020 Elsevier B.V. All rights reserved.