SYNTHESIS OF MONO-DISPERSE MESOPOROUS SILICA-COATED MAGNETITE NANOPARTICLES FOR BIOSEPARATION

Shahzadi Shamaila, Inam Ullah (), Ayesha Shakeel (), Rehana Sharif () and Dayan Ban ()
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Shahzadi Shamaila: Waterloo Institute for Nanotechnology & Department of Electrical and Computer Engineering, University of Waterloo, Ontario N2L 3G1, Canada†Physics Department, University of Engineering & Technology, Lahore 54890, Pakistan
Inam Ullah: ��Physics Department, University of Engineering & Technology, Lahore 54890, Pakistan
Ayesha Shakeel: ��Physics Department, University of Engineering & Technology, Lahore 54890, Pakistan
Rehana Sharif: ��Physics Department, University of Engineering & Technology, Lahore 54890, Pakistan
Dayan Ban: Waterloo Institute for Nanotechnology & Department of Electrical and Computer Engineering, University of Waterloo, Ontario N2L 3G1, Canada

Surface Review and Letters (SRL), 2025, vol. 32, issue 12, 1-8

Abstract: Magnetite nanoparticles (NPs) were synthesized using a cost-effective co-precipitation method. Magnetite NPs were encapsulated with silica via the modified Stober Method. Tetra ethyl ortho silicate (TEOS) was hydrolyzed and condensed with ethanol and H2O solution. Stable and biocompatible NPs were synthesized for biomedical applications such as bioseparation. This study expresses the NPs that can potentially be used in the bioseparation of toxic protein isolations and targeted drug delivery. X-ray diffraction verified the phase pattern having crystals like Fd-3m cubic space. Scanning electron microscopy (SEM) images identified the spherical-shaped NPs having size ranges from 15nm to 30nm for magnetite NPs and 20–40nm for silica-coated magnetite NPs. Fourier transform infrared spectroscopy (FTIR) confirmed the bond spectrum peak at 549cm−1 and 562cm−1 for magnetite NPs and silica-coated magnetite NPs, respectively. UV–Visible analysis observed the band absorptions above 250nm for magnetite and above 300nm for silica-coated magnetite NPs. This research suggests an easy way to use silica-coated Magnetite NPs for bioseparation at room temperature.

Keywords: Nanotechnology; magnetite nanoparticles; co-precipitations method; silica-coated magnetite nanoparticles; modified Stober method; biomedical applications; bioseparation (search for similar items in EconPapers)
Date: 2025
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DOI: 10.1142/S0218625X25500076

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