Ari June Wilyanto Tyas Nenohai, Sunaryono Sunaryono, Ahmad Taufiq, Nandang Mufti
Magnetic fluid based on local iron sand using virgin coconut oil (VCO) as a natural surfactant is a magnetic fluid that has good biocompatible properties. Fe3O4/VCO preparation was successfully synthesized using the coprecipitation method. The Fe3O4 nanoparticles obtained were characterized by using XRD and SEM. The XRD results showed a particle size was 11.28 nm. These results were well confirmed using SEM characterization, which showed that the particle size was 11.34 nm. FTIR characterization shows the bond-CH-(CH2) with an asymmetric vibration model that experiences a shift in the peak vibration on the magnetic fluid sample, and it is a representation presence of oleic acid as one of the substances in the VCO surfactant. Furthermore, a new peak with the-COO-bond shows carboxylic acids as evidence of the combination of symmetrical bonding with surface molecular bonds. This indicates that the addition of VCO surfactants can reduce the agglomeration of magnetite nanoparticles. To determine the Specific Absorption Rate (SAR) value we used magneto-thermal characterization. From the analysis, SAR value of magnetic fluid indicates 1.659 and 2.021 W/g for the Fe3O4/VCO ratio of 1: 3.5 and 1: 4.5, respectively. From these results, the magnetic fluid of Fe3O4/VCO is a potential candidate as a material for hyperthermia therapy. © 2021 Author(s).
Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Jl. Semarang 5, Malang, 65145, Indonesia; Research Center of Minerals and Advanced Materials, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Jl. Semarang 5, Malang, 65145, Indonesia
