Fatimah Yamani, S.T. Ulfawanti Intan Subadra, Nandang Mufti, Ahmad Taufiq
TiO2/Fe3O4/DMSO ferrofluid has been successfully synthesized as an antimicrobial agent. The XRD data analysis presented the presence of cubic inverse spinel and tetragonal structures for Fe3O4 and TiO2 phases. The results of SEM analysis showed that the nanocomposite as a filler was composed of spherical particles with a particle size of 37.3 nm. The presence of Fe3O4 was confirmed by the appearance of Fe-O bonds on tetrahedral and octahedral sites at 582 cm-1 and 443 cm-1. Meanwhile, the C=O bond was detected at 1745 cm-1 and 1658 cm-1. The stretching vibration of Ti-O-Ti appeared at 702 cm-1. Furthermore, the S=O vibration of DMSO as a surfactant appeared at 1042 cm-1 and 952 cm-1. Furthermore, dispersing liquid was detected by the presence of C-H vibrations at 3007, 2920, and 1461 cm-1. The filler had a superparamagnetic character with a saturation magnetization value of 3.3 emu/g. Interestingly, the antimicrobial performance of the ferrofluid against Candida albicans, Staphylococcus aureus bacteria, Bacillus subtilis, and Escherichia coli had inhibition zone values of 8.95, 10.05, 10.17, and 7.72 mm, respectively. © 2025 Institute of Physics Publishing. All rights reserved.
Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Malang, Indonesia
