Facile microwave synthesis of uniform magnetic nanoparticles with minimal sample processing

• Published in: Journal of magnetism and magnetic materials Vol. 421; pp. 283 - 291
• Main Authors: Schneider, Thomas, Löwa, Anna, Karagiozov, Stoyan, Sprenger, Lisa, Gutiérrez, Lucía, Esposito, Tullio, Marten, Gernot, Saatchi, Katayoun, Häfeli, Urs O.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-01-2017
• Subjects: Alendronate; Iron oxide; Iron(III) acetyl acetonate; Magnetic nanoparticle; Microwave synthesis; Thermal decomposition; Iron oxide; Alendronate; SQUID; Thermal decomposition; FT-IR; DLS; Microwave synthesis; XRD; MNP; Iron(III) acetyl acetonate; Magnetic nanoparticle; VSM; CV; DSC; TEG; Msat; TEM
• ISSN: 0304-8853
• DOI: 10.1016/j.jmmm.2016.07.063

We present a simple and rapid method for the synthesis of small magnetic nanoparticles (diameters in the order of 5–20nm) and narrow size distributions (CV's of 20–40%). The magnetite nanoparticles were synthesized in green solvents within minutes and the saturation magnetization of the particles was tunable by changes in the reaction conditions. We show that this particle synthesis method requires minimal processing steps and we present the successful coating of the particles with reactive bisphosphonates after synthesis without washing or centrifugation. We found minimal batch-to-batch variability and show the scalability of the particle synthesis method. We present a full characterization of the particle properties and believe that this synthesis method holds great promise for facile and rapid generation of magnetic nanoparticles with defined surface coatings for magnetic targeting applications.
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●Rapid and facile synthesis of magnetic nanoparticles.●Microwave synthesis in green solvent.●Magnetite MNPs with small sizes and high saturation magnetization.●Tunable particle properties depending on heating duration.●Scalable MNP synthesis.