A Study on Stability of Magnetite Nanoparticles Suspension in Water by Zeta Potential Measurements

Dragoş-Viorel Brezoi; Anca Irina Gheboianu; Bogdan Trică

doi:10.2478/bsmm-2025-0014

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A Study on Stability of Magnetite Nanoparticles Suspension in Water by Zeta Potential Measurements

Scientific Bulletin of Valahia University - Materials and Mechanics

Volume 21 (2025): Issue 25 (October 2025)

By: Dragoş-Viorel Brezoi, Anca Irina Gheboianu and Bogdan Trică

Open Access

|Dec 2025

Abstract

The paper presents an experimental research on the stability of an aqueous suspension containing 35% magnetite nanoparticles (MNPs) using the zeta potential measurement method. The main objective of this study is to determine the variation of zeta potential as function of the suspension’s alkalinity. By charging the surfaces of magnetite nanoparticles with negative hydroxyl groups, they produce electrostatic repulsion between magnetite nanoparticles and prevent short- and medium-term magnetic agglomeration and sedimentation. Alkalinising together with ultrasonication treatment are effective methods for stabilising magnetite nanoparticles suspensions used as ferrofluids.

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Articles in this issue

DOI: https://doi.org/10.2478/bsmm-2025-0014 | Journal eISSN: 2537-3161 | Journal ISSN: 1844-1076

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Language: English

Page range: 22 - 25

Published on: Dec 6, 2025

Published by: Valahia University of Targoviste

In partnership with: Paradigm Publishing Services

Publication frequency: 2 issues per year

Keywords:

Related subjects:

Mechanical engineering,

Fundamentals of mechanical engineering,

Thermodynamics,

Bioengineering and biomedical engineering,

Biomaterials

© 2025 Dragoş-Viorel Brezoi, Anca Irina Gheboianu, Bogdan Trică, published by Valahia University of Targoviste
This work is licensed under the Creative Commons Attribution 4.0 License.

Volume 21 (2025): Issue 25 (October 2025)