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Two-stage kinetics of field-induced aggregation of medium-sized magnetic nanoparticles

Ezzaier, Hinda and Marins, Jéssica Alves and Razvin, Ilia and Abbas, Micheline and Ben Haj Amara, Abdessalem and Zubarev, Andrey and Kuzhir, Pavel Two-stage kinetics of field-induced aggregation of medium-sized magnetic nanoparticles. (2017) Journal of Chemical Physics, 146 (11). 114902. ISSN 0021-9606

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Official URL: https://doi.org/10.1063/1.4977993

Abstract

The present paper is focused on the theoretical and experimental study of the kinetics of field-induced aggregation of magnetic nanoparticles of a size range of 20-100 nm. Our results demonstrate that (a) in polydisperse suspensions, the largest particles could play a role of the centers of nucleation for smaller particles during the earliest heterogeneous nucleation stage; (b) an intermediate stage of the aggregate growth (due to diffusion and migration of individual nanoparticles towards the aggregates) is weakly influenced by the magnetic field strength, at least at high supersaturation; (c) the stage of direct coalescence of drop-like aggregates (occurring under magnetic attraction between them) plays a dominant role at the intermediate and late stages of the phase separation, with the time scale decreasing as a square of the aggregate magnetization.

Item Type:Article
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Other partners > Université Nice Sophia Antipolis (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Ural Federal University - UrFU (RUSSIA)
Other partners > Université de Carthage (TUNISIA)
Laboratory name:
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Deposited By: Loetitia MOYA
Deposited On:23 Oct 2018 08:58

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