Ferrimagnetic iron oxide nanoparticle

Ferrimagnetic iron oxide nanoparticles are synthetic particles, typically 1–100 nm in size, composed mainly of iron oxides such as magnetite (Fe₃O₄) or maghemite (γ-Fe₂O₃)[3][4][5]. They exhibit strong ferrimagnetism, meaning their crystal structure aligns magnetic moments in opposite directions but with unequal strengths, resulting in a net magnetic moment[5]. These nanoparticles can be formulated to have high coercivity and saturation magnetization, making them especially useful for magnetic hyperthermia (cancer therapy), magnetic resonance imaging (MRI) as contrast agents, and as vehicles for targeted drug delivery[1][4][5]. Surface modifications (such as coating with gold or polymers) can enhance their stability and biocompatibility[2][4]. However, these nanoparticles are not biological macromolecular targets like enzymes or receptors; rather, they are nanomaterials employed for their physical and chemical properties in diagnostic and therapeutic contexts, not as drug targets themselves. Important note: "Ferrimagnetic iron oxide nanoparticle" is not a canonical therapeutic target (e.g., receptor, enzyme, ion channel) but rather a type of engineered nanomaterial. If you seek information on an actual molecular target, such as a specific receptor or protein, clarification or correction is needed for structured target database curation. The term is correctly spelled and describes the material accurately, but it is not a "target" in the pharmacological sense[4][5].

Other names

Iron oxide nanoparticleMagnetite nanoparticleMaghemite nanoparticleFe₃O₄ nanoparticleγ-Fe₂O₃ nanoparticleMagnetic nanoparticle

Ferrimagnetic iron oxide nanoparticles operate through physical interaction, such as magnetic heating under an alternating magnetic field for hyperthermia. They also provide contrast enhancement by interacting with magnetic fields during MRI and serve as carriers for loaded drugs or biomolecules.