New 3D Vortex Microfluidic System Tested for Magnetic Core-Shell Fe3O4-SA Nanoparticle Synthesis
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Published:2024-05-21
Issue:11
Volume:14
Page:902
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ISSN:2079-4991
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Container-title:Nanomaterials
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language:en
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Short-container-title:Nanomaterials
Author:
Niculescu Adelina-Gabriela12ORCID, Munteanu (Mihaiescu) Oana Maria1, Bîrcă Alexandra Cătălina1, Moroșan Alina3ORCID, Purcăreanu Bogdan14ORCID, Vasile Bogdan Ștefan1ORCID, Istrati Daniela3ORCID, Mihaiescu Dan Eduard3ORCID, Hadibarata Tony15ORCID, Grumezescu Alexandru Mihai12ORCID
Affiliation:
1. Department of Science and Engineering of Oxide Materials and Nanomaterials, National University of Science and Technology Politehnica Bucharest, 011061 Bucharest, Romania 2. Research Institute of the University of Bucharest—ICUB, University of Bucharest, 050657 Bucharest, Romania 3. Department of Organic Chemistry, National University of Science and Technology Politehnica Bucharest, 011061 Bucharest, Romania 4. BIOTEHNOS S.A., Gorunului Rue, No. 3-5, 075100 Otopeni, Romania 5. Department of Environmental Engineering, Faculty of Engineering and Science, Curtin University Malaysia, CDT 250, Miri 98009, Malaysia
Abstract
This study’s main objective was to fabricate an innovative three-dimensional microfluidic platform suitable for well-controlled chemical syntheses required for producing fine-tuned nanostructured materials. This work proposes using vortex mixing principles confined within a 3D multilayered microreactor to synthesize magnetic core-shell nanoparticles with tailored dimensions and polydispersity. The newly designed microfluidic platform allowed the simultaneous obtainment of Fe3O4 cores and their functionalization with a salicylic acid shell in a short reaction time and under a high flow rate. Synthesis optimization was also performed, employing the variation in the reagents ratio to highlight the concentration domains in which magnetite is mainly produced, the formation of nanoparticles with different diameters and low polydispersity, and the stability of colloidal dispersions in water. The obtained materials were further characterized by X-ray diffraction (XRD), Fourier-transform infrared (FT-IR) spectroscopy, dynamic light scattering (DLS), and transmission electron microscopy (TEM), with the experimental results confirming the production of salicylic acid-functionalized iron oxide (Fe3O4-SA) nanoparticles adapted for different further applications.
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