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Structure et dynamique des colloïdes magnétiques :
détermination expérimentale et modélisation brownienne.

Abstract : Magnetic colloidal suspensions are used in numerous practical applications. However, their structural and dynamical properties are hardly known, particularly under an external applied field. For this purpose, an approach
that couples Brownian dynamics numerical simulations together with experimental measurements on tailored aqueous dispersions has been carried out. The use of scattering techniques, especially neutron scattering, enabled us not only to decipher the local structure but also to examine the translational dynamics at several length-scales. The effect of an external magnetic field has been measured and calculated parallely by the numerical simulation. Moreover, the rotational dynamics has been probed by magneto-optical birefringence relaxation measurements. The comparison between experimental and numerical results has improved the knowledge of the system, emphasising the role of the dipolar interaction.
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https://tel.archives-ouvertes.fr/tel-00069633
Contributor : Guillaume Mériguet <>
Submitted on : Thursday, May 18, 2006 - 6:35:18 PM
Last modification on : Friday, October 23, 2020 - 4:37:26 PM
Long-term archiving on: : Saturday, April 3, 2010 - 10:03:23 PM

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  • HAL Id : tel-00069633, version 1

Citation

Guillaume Mériguet. Structure et dynamique des colloïdes magnétiques :
détermination expérimentale et modélisation brownienne.. Autre. Université Pierre et Marie Curie - Paris VI, 2005. Français. ⟨tel-00069633⟩

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