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<p>Multicore–shell Fe<sub>3</sub>O<sub>4</sub>-Au@SiO<sub>2</sub> (FAS) particles were successfully synthesized by the Stöber method with various ratios of Fe<sub>3</sub>O<sub>4</sub>/Au. Transmission electron microscopy (TEM) results show that the FAS material exhibits a spherical morphology and is relatively uniform, with an average particle size of approximately 400–500&#xa0;nm. Additionally, the FAS samples form a structure of porous SiO<sub>2</sub> shells with multiple cores. These FAS particles exhibit superparamagnetism with saturation magnetization proportional to the Fe<sub>3</sub>O<sub>4</sub>:Au ratio and absorb visible green light, with a surface plasmon resonant peak around 545&#xa0;nm. The magnetic and optical properties of these particles make them well suited for a broad range of biomedical applications.</p>

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Synthesis and Characterization of Multicore–Shell Fe3O4-Au@SiO2 Particles Prepared by the Stöber Method

  • 期刊论文

  • 发表日期：

    2025年1月3日

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  • Phi Thi Huong,
  • Hoang Van Huy,
  • Nguyen Hoang Luong,
  • Luu Manh Quynh,
  • Vuong Van Hiep,
  • Nguyen Thi Thanh Van,
  • Tran Thi Hong,
  • Nguyen Hoang Nam

摘要

Multicore–shell Fe3O4-Au@SiO2 (FAS) particles were successfully synthesized by the Stöber method with various ratios of Fe3O4/Au. Transmission electron microscopy (TEM) results show that the FAS material exhibits a spherical morphology and is relatively uniform, with an average particle size of approximately 400–500 nm. Additionally, the FAS samples form a structure of porous SiO2 shells with multiple cores. These FAS particles exhibit superparamagnetism with saturation magnetization proportional to the Fe3O4:Au ratio and absorb visible green light, with a surface plasmon resonant peak around 545 nm. The magnetic and optical properties of these particles make them well suited for a broad range of biomedical applications.