Interfaces, Confinement, Matériaux et Nanostructures - ICMN

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Nanostructured and Confined Systems

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In condensed matter, the reduction in dimensionality and size up to the nanoscale introduces changes in structural and thermodynamic behaviours induced by surface, interface or finite quantity of matter. In addition, the state of confinement of matter modifies the dynamics and diffusion properties of species.


In this thematic group, we are interested not only in the way in which thermodynamics controls the 2D or 3D organization of matter at the nanoscale (self-organized systems, complex fluids) but also how the confinement of matter (nanoparticles, confined fluids) influences thermodynamics and dynamics of systems. The activities of the team therefore revolve around determining the relationships between the structure, thermodynamics and in some cases the kinetics and/or dynamics of nanostructured and confined systems.
Our activities revolve around four themes :


 

 

Structure and dynamics of confined fluids and complex systems.

Influence of confinement on the structural, thermodynamic (liquid / gas phase transition) and dynamic properties of fluids through both experimental and numerical approaches.

 

 

Nanoalloys : structure and kinetics.

Effect of size reduction on the atomic arrangement of assembly of binary or ternary metal clusters : mechanisms of segregation, order-disorder at equilibrium and out of equilibrium, kinetics of growth and phase transition and ageing and in particular environmental effects (support and exposure to reactive gases).

 

 

Nanostructuration of polymers.

Study of nanostructuration phenomena that can be obtained by controlled phase separation or self-organization of block copolymers, in polymers confined in the form of thin films.

 

 

Mesophase emulsions : self-organization.

Influence of external parameters and composition on lipid structures, whether emulsified or not : focused on the « lipid mesophase / emulsifier » and « mesophase / external environment emulsions » interaction. Applications of nanostructured emulsions in cosmetics, in the food industry or in pollution control.


Keywords :

  • Systems studied : colloids, supported metallic nanoalloys, block copolymers, complex molecular fluids, etc
  • Tools : small and wide angle X-ray scattering (possibly : in situ, anomalous, grazing incidence or transmission), NMR in spectroscopy mode, relaxation and pulsed field gradient, electron microscopy techniques (High-Resolution, HAADF, spectroscopic imaging) and near field, but also simulation techniques : Monte Carlo, Molecular or Brownian Dynamics.