Size-controlled synthesis of Fe3O4 and Fe3O4@SiO2 nanoparticles and their superparamagnetic properties tailoring

Muhammad Sajid, Sidra Shuja, Hongpan Rong, Jiatao Zhang*

*Corresponding author for this work

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Abstract

Superparamagnetic properties and fine-tuning of colloidal Fe3O4 nanoparticles are important for their widespread biomedical applications. Herein, colloidal Fe3O4 nanoparticles (NPs) of different sizes (8–20 ​nm) were prepared, and their hydrophilization with SiO2 shell coating to be Fe3O4@SiO2 core-shell had been realized successively. The size of Fe3O4 NPs was controlled by different heating rates. Transmission electron microscope (TEM), powder X-ray diffractometry (XRD), and vibrating sample magnetometer (VSM) were performed to examine the morphology, crystallinity, and magnetic properties of the prepared Fe3O4 and Fe3O4@SiO2 core-shell NPs, respectively. In addition, high resolution transmission electron microscope (HRTEM) results suggested that Fe3O4 NPs had well crystallization. Enabled by such, their superparamagnetic properties can be fine-tuned accordingly and cater to their potential applications.

Original languageEnglish
Pages (from-to)116-119
Number of pages4
JournalProgress in Natural Science: Materials International
Volume33
Issue number1
DOIs
Publication statusPublished - Feb 2023

Keywords

  • Aqueous inverse microemulsion
  • Core-shell
  • FeO nanoparticles
  • FeO@SiO hydrophilization
  • Superparamagnetic

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Sajid, M., Shuja, S., Rong, H., & Zhang, J. (2023). Size-controlled synthesis of Fe3O4 and Fe3O4@SiO2 nanoparticles and their superparamagnetic properties tailoring. Progress in Natural Science: Materials International, 33(1), 116-119. https://doi.org/10.1016/j.pnsc.2022.08.003