6533b7d3fe1ef96bd1260209
RESEARCH PRODUCT
The cage elasticity and under-field structure of concentrated magnetic colloids probed by small angle X-ray scattering
Aymeric RobertAymeric RobertGuillaume MériguetRégine PerzynskiEmmanuelle DuboisElie WandersmanAndrejs Cēberssubject
Length scaleCondensed Matter::Quantum GasesBulk modulusMaterials scienceCondensed matter physicsScatteringSmall-angle X-ray scatteringMagnetostriction02 engineering and technologyGeneral ChemistryElasticity (physics)021001 nanoscience & nanotechnologyCondensed Matter Physics01 natural sciencesCondensed Matter::Soft Condensed MatterDipoleCrystallography0103 physical sciences010306 general physics0210 nano-technologyAnisotropy[PHYS.COND.CM-SCM]Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft]description
International audience; In the present study we probe the bulk modulus and the structure of concentrated magnetic fluids by small angle X-ray scattering. The electrostatically stabilized nanoparticles experience a repulsive interparticle potential modulated by dipolar magnetic interactions. On the interparticle distance length scale, we show that nanoparticles are trapped under-field in oblate cages formed by their first neighbours. We propose a theoretical model of magnetostriction for the field-induced deformation of the cage. This model captures the anisotropic features of the experimentally observed scattering pattern on the local scale in these strongly interacting colloidal dispersions
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-11-08 |