Faculty of Physics - University of Bucharest

UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS

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2025-07-06 14:16

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Conference: Bucharest University Faculty of Physics 2025 Meeting

Section: Solid State Physics and Materials Science

Title:

Spectacular dispersibility of iron oxide nanoparticles synthesized by laser pyrolysis with isopropanol vapors as sensitizer

Authors:

Iulia Ioana LUNGU (1), Florian DUMITRACHE (1), Anca CRIVEANU (1), Claudiu FLEACA (1), Lavinia GAVRILA-FLORESCU (1), Ana Maria BANICI (1), Evghenii GONCEARENCO (1), Razvan Mihai DUMITRACHE (2)

Affiliation:

(1) National Institute of Laser, Plasma and Radiation Physics, 409 Atomistilor Street, 077125, Magurele Ilfov, Romania

(2) Faculty of Physics, University of Bucharest, 077125, Bucharest-Magurele, Romania

E-mail

iulia.lungu@inflpr.ro

Keywords:

iron oxide nanoparticles, laser pyrolysis

Abstract:

Iron oxide nanoparticles with a mean size that falls under 8 nm have unique properties for biomedical applications due to their features, such as superparamagnetic properties, excellent biocompatibility combined with cellular internalization. Laser pyrolysis is a versatile method for iron oxide nanoparticle synthesis that comes with several advantages, including, but not limited to the purity of the final particles, control over the size range, relatively high yield. Since the method is based on the interaction between a CO2 laser and a gas mixture, special consideration needs to be given regarding the precursor and sensitizer gases. This study investigates the synthesis of iron oxide nanoparticles using iron pentacarbonyl and isopropanol vapors as precursor/sensitizer gases. It also focused on the dispersability and C content iron oxide nanoparticles resulted from laser pyrolysis when isopropanol is used as a sensitizer. For a better comparison and deeper understanding, several samples were synthesized varying the gas flows, but maintaining the pressure and power regime constant. The elemental and structural characterizations confirmed the nature of the particles, and DLS analysis indicated excellent stability of the samples in distilled water. Further, a reference sample was tested regarding its stability in organic fluids, with the addition of oleic acid. The results displayed extremely reduced NP agglomerations with exceptional stability, even after 20h. Moreover, this protocol did not hinder the magnetic behavior of the NPs.

Acknowledgement:

This research was supported (or financed) by Romanian Ministry of Research, Innovation and Digitalization under Romanian National Nucleu Program LAPLAS VII.