CHAUSSEDENT , Stéphane

A simple transferable adaptive model is developed and it allows for the first time to simulate by Molecular Dynamics the separation of large phases in the MgO-SiO 2 binary system, as experimentally observed and as predicted by the phase diagram, meaning that separated phases have various compositions. This is a real improvement over...

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The development of new applications based on glass doped with nanoparticles is growing in interest during the last years. The structure and properties of Ca-based silicate nanoparticles formed in situ in a silica matrix through a phase separation mechanism were investigated by using Molecular Dynamics simulations and compared to nanoparticles...

New rare-earth ion-doped optical fibres stand for potential applications in telecommunications, sensors, fibre lasers. Although silica-based optical fibres present attractive physical and economical properties as glass host, spectroscopic limitations appears when rare-earth ions are inserted in silica, such as clustering or inappropriate local...

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International audience

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International audience

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Cette étude révèle un nouvel aspect sur la structure de la silice à l'échelle nanométrique. L'orientation acquise par les petits anneaux (Si-O) n pour n ≤ 5 suite à la déformation à chaud persiste à froid et induit une anisotropie structurale dont la forme « isotropie transverse » est vérifiée par spectrométrie Raman.

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