Pegylated ultrafine Fe3O4 nanoparticles(High-temperature?Pyrolysis Method)

PEGylated ultra-small Fe3O4 nanoparticles (high-temperature pyrolysis method) are poor nanomaterials synthesized by high-temperature pyrolysis method. The diameter of these nanoparticles is usually less than 10 nanometers (<10 nm), as observed by TEM. Size is generally in the range of 5-10 nm

Ultra-small size: The size of this type of nanoparticles is usually in the range of 5-10 nm. The ultra-small size helps to improve its diffusion capacity and cellular uptake efficiency in living organisms. PEGylation surface modification: Modifying the surface of nanoparticles with polyethylene glycol (PEG) increases their stability and biocompatibility while reducing non-specific interactions with biomolecules. High-temperature pyrolysis synthesis: One-step synthesis using high-temperature pyrolysis. This method can obtain single-crystal iron nanoparticles with uniform size and good crystallinity. Superparamagnetism: These nanoparticles exhibit superparamagnetic properties with high saturation magnetization, making them suitable for magnetic resonance imaging (MRI) and magnetic hyperthermia therapy (MHT). High biocompatibility: PEGylation improves the compatibility of nanoparticles with biological systems and reduces immune response and toxicity. Long circulation time: PEG modification helps extend the residence time of nanoparticles in the blood circulation and increases their ability to accumulate in diseased sites.

Magnetic resonance imaging (MRI) contrast agent: Due to its superparamagnetism, Fe3O4 nanoparticles can be used as a T2 contrast agent for MRI, reducing the relaxation time of surrounding protons and improving the clarity and accuracy of imaging. Surface modification can improve the biocompatibility and tumor targeting performance of Fe3O4 nanoparticles, ultimately improving MRI imaging signals and therapeutic effects. Magnetic hyperthermia therapy (MHT): Fe3O4 nanoparticles can generate local high temperatures under the action of an external alternating magnetic field and are used for magnetic hyperthermia therapy to treat tumors. Through surface modification, Fe3O4 nanoparticles can enhance their accumulation inside tumors, thereby improving the effect of magnetothermal therapy. Drug delivery system: Fe3O4 nanoparticles can be used as drug carriers, enriched in tumor tissues through the EPR effect, and improve the targeted transport efficiency of drugs. For example, Fe3O4@void@ZnO-DOX nanoparticles designed using a template-assisted method are used for magnetic targeted delivery of drugs to treat tumors. Multimodal imaging and tumor collaborative therapy: Fe3O4 nanoparticles and their derived composite nanomaterials have attracted widespread attention in multimodal imaging and tumor collaborative therapy. Fe3O4 nanoparticles of different sizes can be obtained through different preparation methods, and modification on their surface can improve biocompatibility and tumor targeting performance.