Novel Formulation of Ionic Liquid-Based Ferrofluids: Investigation of the Magnetic Properties
This study establishes a viable process to prepare hybrid nanomaterials comprising stable ionic liquid-based ferrofluids (IL-FFs) with tunable magnetic anisotropy and reduced water contamination, where the latter strongly decreases the colloidal stability of the system. Spinel iron oxide magnetic nanoparticles (MNPs) with different compositions (γ-Fe<sub>2</sub>O<sub>3</sub>, Co<sub>0.5</sub>Zn<sub>0.5</sub>Fe<sub>2</sub>O<sub>4</sub>, and CoFe<sub>2</sub>O<sub>4</sub>) and different magnetic anisotropies were synthesized by the polyol method. The particles were coated with dihydrocaffeic acid (DHCA) in tetrahydrofuran (THF) and subsequently transferred directly to 3-ethyl-1-methylimidazolium acetate (EMIMAc), exploring the synergy between intermolecular and covalent bonding to obtain stable dispersions. The evolution of magnetic properties from powder to IL-FFs systems was investigated, allowing us to highlight the synergistic influence of interparticle interaction and magnetic anisotropy on the magnetization dynamics of the nanoparticles.
Authors
- Gaspare Varvaro (ORCID: https://orcid.org/0000-0001-7313-7268)
- Maryam Abdolrahimi (ORCID: https://orcid.org/0000-0003-1989-0157)
- Sawssen Slimani (ORCID: https://orcid.org/0000-0002-5830-1864)
- P. Imperatori (ORCID: https://orcid.org/0000-0001-5143-9038)
- Luca Leoncino (ORCID: https://orcid.org/0000-0001-8561-3460)
- Pierfrancesco Maltoni (ORCID: https://orcid.org/0000-0001-9834-3164)
- Diego Colombara (ORCID: https://orcid.org/0000-0002-8306-0994)
- S. Laureti (ORCID: https://orcid.org/0000-0002-9625-2098)
- Alessandro Talone (ORCID: https://orcid.org/0000-0002-6560-3254)
- Davide Peddis (ORCID: https://orcid.org/0000-0003-0810-8860)
- Michael Casale (ORCID: https://orcid.org/0000-0002-5427-9401)
Institutions
- Roma Tre University (IT)
- Italian Institute of Technology (IT)
- Institute of Structure of Matter (IT)
- National Research Council (IT)
- National Interuniversity Consortium of Materials Science and Technology (IT)
- University of Genoa (IT)
Publication Details
- Journal
- Langmuir
- Published
- 2025-05-07
- DOI
- https://doi.org/10.1021/acs.langmuir.5c00403
- Citations
- 3
- Primary Topic
- Characterization and Applications of Magnetic Nanoparticles
- Type
- article
- Field-Weighted Citation Impact
- 2.02
Funders
- European Commission
- Ministero dell'Università e della Ricerca