Synthesis and characterization of Co(x)Fe(1−x)Fe(2)O(4) nanoparticles by anionic, cationic, and non-ionic surfactant templates via co-precipitation

The cobalt ferrite nanoparticles (Co(x)Fe(1−x)Fe(2)O(4)) were synthesized by the surfactant templated co-precipitation method using various surfactants namely sodium dodecyl sulfate (SDS), hexadecyltrimethylammonium bromide (CTAB), and Tween20. Under the substitution, the Co(x)Fe(1−x)Fe(2)O(4) particles were synthesized at various Co(2+) and Fe(2+) mole ratios (x = 1, 0.6, 0.2, and 0) with the SDS. The cobalt ferrite nanoparticles were characterized for their morphology, structure, magnetic, and electrical properties. All Co(x)Fe(1−x)Fe(2)O(4) nanoparticles showed the nanoparticle sizes varying from 16 to 43 nm. In the synthesis of CoFe(2)O(4), the SDS template provided the smallest particle size, whereas the saturated magnetization (M(s)) of CoFe(2)O(4) was reduced by using CTAB, SDS, and Tween20. For the Co(x)Fe(1−x)Fe(2)O(4) as synthesized by the SDS template at 1.2 CMC, the M(s) increased with increasing Fe(2+) mole ratio. The highest M(s) of 100.4 emu/g was obtained from the Fe(3)O(4) using the SDS template. The Fe(3)O(4) nanoparticle is potential to be used in various actuator and biomedical devices.