Structural, magnetic, optical and antibacterial properties of magnetite ferrofluids with PEG-20000 template

A. Taufiq*, F. N. Ikasari, D. Yuliantika, S. Sunaryono, N. Mufti, H. Susanto, E. Suarsini, N. Hidayat, A. Fuad, A. Hidayat, M. Diantoro

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

8 Citations (Scopus)

Abstract

Ferrofluids based on magnetite nanoparticles by PEG-20000 as template were successfully prepared through a co-precipitation route. In this experiment, TMAH was employed to coat the magnetite nanoparticles from iron sand preventing agglomerations. The structural, magnetic, optical, and antibacterial performances were investigated by means of XRD, SEM/EDX, FTIR, UV-Vis, VSM, and colony formation test. The magnetite particles were formed in a nanometric size of 9.4 nm in a spherical shape with the lattice parameter of 8.4 Å. The FTIR spectrum presented the vibration of Fe-O bond resulting from the magnetite particle both in tetrahedral and octahedral sites. The magnetite nanoparticle had band gap energy of 2.26 eV. Furthermore, the ferrofluids exhibited a superparamagnetic character with a saturation magnetization that was lower than the magnetite nanopowders. Interestingly, the ferrofluids had a significant antibacterial activity on E. coli (gram-negative bacteria) up to multiples times compare to control or placebo. Therefore, it provides a big opportunity to be applied for antiseptical agents as well as for water treatment or sanitation. Besides that, the utilization of the iron sand becomes a novel candidate as an alternative main precursor to produce antibacterial materials.

Original languageEnglish
Pages (from-to)1728-1735
Number of pages8
JournalMaterials Today: Proceedings
Volume17
DOIs
Publication statusPublished - 2019
Externally publishedYes
Event1st Materials Research Society of Thailand International Conference, MRS Thailand 2019 - Chiang Mai, Thailand
Duration: 31 Oct 20173 Nov 2017

Keywords

  • Antibacterial
  • Ferrofluid
  • Iron sand
  • Nanoparticle
  • Superparamagnetic

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