Synthesis and Characterization of Magnetic (Co-Ni-Fe2O4) Nano Ferrite for Biomedical Application

Abstract

In this research, prepared the samples in formal Co1-xNixFe2O4 ferrites nanoparticles when x, (x = 0.0, 0.2, and 0.4), by two methods, Co – precipitation and pulsed laser deposition (PLD). Samples prepared using Co-precipitation was calcined in (300 ºC). The resulting powder is then compressed into a disc with a diameter of (2 cm) and then we use laser deposition technology to obtain thin film. The x-ray spectrum shows that the pattern of the particles formed is of the face -centered cubic and the theoretical values of the lattice constant and and crystalline size (D) are calculated The crystalline size calculated is located in the range (22.6-26.6 nm), either in the pulsed laser deposition method in the range (13.7-13.7nm ), which reflects the highly crystalline nature of these nanoparticles.. The FTIR spectrum shows two absorption bands ranging between 400 and 600 cm-1 . These bands indicate that the composition of the spectrum for all the samples is ferrite. The Field emission scanning electron microscopes (FE-SEM) images confirmed that the preparation methods produced spherical nanoparticles with a slight change in the particle size distribution. The average particle size by coprecipitation had estimated to be about 23 nm and the average particle size by pulsed laser deposition (PLD) method had estimated to be about 20 nm. The magnetic properties vibrating sample magnetometer (VSM) had a good correlation with the structural parameters of the spinal structure, which increased with the Ni content. Both of samples for powder and (PLD) have been show S shape of hysterias loop. When using nanoparticles prepared by using the method of co-precipitation on Escherichia coli (S.aureus) bacteria, and Streptococcus bacteria,, it was found that highest inhibition zone ranged from (27-33) mm. When using nanoparticles prepared by using the method of pulsd laser deposition on the same types of bacteria, (S.aureus)was found to have the highest inhibition zone (22-32) mm.