New 3D Vortex Microfluidic System Tested for Magnetic Core-Shell Fe₃O₄-SA Nanoparticle Synthesis

Area of Science:

• Materials Science
• Nanotechnology
• Chemical Engineering

Background:

• Precise control over nanoparticle synthesis is crucial for advanced material applications.
• Existing methods for producing magnetic core-shell nanoparticles often face challenges in scalability and control over size and properties.

Purpose of the Study:

• To fabricate an innovative three-dimensional (3D) microfluidic platform for controlled chemical synthesis.
• To utilize vortex mixing principles within a 3D multilayered microreactor for synthesizing magnetic core-shell nanoparticles.
• To tailor nanoparticle dimensions and polydispersity for specific applications.

Main Methods:

• Fabrication of a novel 3D multilayered microfluidic platform.
• Synthesis of iron oxide (Fe3O4) cores and salicylic acid (SA) shells using vortex mixing.
• Optimization of synthesis by varying reagent ratios.
• Characterization using X-ray diffraction (XRD), Fourier-transform infrared (FT-IR) spectroscopy, dynamic light scattering (DLS), and transmission electron microscopy (TEM).

Main Results:

• Simultaneous synthesis and functionalization of Fe3O4 cores with SA shells.
• Achieved synthesis under high flow rates and short reaction times.
• Identified optimal reagent concentrations for magnetite production, controlled nanoparticle diameter, and low polydispersity.
• Demonstrated colloidal stability of the synthesized Fe3O4-SA nanoparticles in water.

Conclusions:

• The developed 3D microfluidic platform enables efficient and controlled synthesis of tailored magnetic core-shell nanoparticles.
• The Fe3O4-SA nanoparticles exhibit desirable characteristics, including controlled size, low polydispersity, and good stability.
• This platform offers a promising approach for producing functionalized nanomaterials for various applications.