From Bimetallic Oleates to Customized Biomedical Nanoplatforms: A Versatile Approach for the Multidoping of Ferrites

Area of Science:

• Materials Science
• Nanotechnology
• Biomedical Engineering

Background:

• Development of advanced magnetic nanoparticles (NPs) is crucial for nanomedicine.
• Tailoring magnetic properties of NPs enhances their therapeutic efficacy.
• Existing synthesis methods often lack control over NP composition and properties.

Purpose of the Study:

• To present an improved chemical synthesis for Fe-M bimetallic oleates (M = Mn, Co, Zn).
• To create monodisperse, single-crystalline magnetic nanoparticles with tunable properties.
• To evaluate the biomedical potential of synthesized and PEGylated nanoparticles.

Main Methods:

• Thermal decomposition of Fe-M bimetallic oleates.
• Synthesis of monodoped (MFe3O4) and multidoped (MAMBFe3O4) nanoparticles.
• Characterization using DC magnetometry, 57Fe-Mössbauer spectroscopy, AC/DC hysteresis loop modeling.
• Biomedical evaluation including magnetothermal performance, magnetic targeting, cytotoxicity, and in vitro antitumoral assays.

Main Results:

• Successfully synthesized six highly monodisperse, octahedral-like magnetic NPs with high saturation magnetization.
• Verified uniform composition and analyzed dopant lattice occupation.
• Determined magnetic anisotropy constants at low and room temperatures.
• Demonstrated tunable magnetothermal performance, with Mn-doped NPs showing efficient heating and Mn-Co-doped NPs achieving high heating.
• Mn-Zn NPs showed potential for magnetic targeting and hyperthermia, with good antitumoral capacity and low cytotoxicity.

Conclusions:

• The developed synthesis technique yields tunable magnetic nanoparticles with controlled properties.
• PEGylated nanoparticles exhibit promising potential for magnetic hyperthermia and targeted cancer therapy.
• The engineered nanoplatforms offer versatile solutions for diverse nanomedicine applications.