Preparation of Fe3O4/ZnO Ferrofluids Dispersed in Sunflower Seed Oil for Antibacterial Agents
Hendra Ratmono, ST. Ulfawanti Intan Subadra, Ahmad Taufiq*, Nandang Mufti, Arif Hidayat, Sunaryono, Markus Diantoro

Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Indonesia

Abstract

In this study, the ferrofluids with Fe3O4/ZnO nanoparticles as fillers dispersed in sunflower seed oil were fabricated. Our XRD analysis results suggested that the Fe3O4 nanoparticles had a crystallite size of 9 nm with diffraction peaks detected at 2-theta of 30.3&#9675-, 35.7&#9675-, 43.4&#9675-, 53.8&#9675-, 57.3&#9675-, and 62.9&#9675-. Meanwhile, the ZnO nanoparticle presented crystallite size of 41 nm with diffraction peaks detected at 2-theta of 31. 8&#9675-, 34.4&#9675-, 36.3&#9675-, 47.5&#9675-, 56.6&#9675-, 62.9&#9675-, and 67.9&#9675-. The functional groups observed through the FTIR confirmed the successful synthesis of Fe3O4/ZnO ferrofluids with the unique functional groups of C=C observed at a wavenumber of 1700 cm-1. Furthermore, the vibration of COO- was also detected at a wavenumber of 1280 cm-1, while C-O was found at a wavenumber of 1000 cm-1. Also, the C-H2 vibration was observed at wavenumbers of 2881 cm-1 and 2990 cm-1. Our findings showed that the Fe3O4/ZnO ferrofluids dispersed in sunflower seed oil carry the potential of an excellent antibacterial agent againt S. aureus and E. coli bacteria.

Keywords: Fe3O4/ZnO, ferrofluid, nanoparticle, antibacterial agent, sunflower seed oil.

Topic: Magnetic materials