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Étude du dopage de matériaux covalents cages nanostructurés

Abstract : Cage-like materials are interesting, among other properties, because they offer different possibilities of doping: in addition to substitutional doping, we can have endohedral or exohedral doping, depending on the localization of the doping atoms inside or outside the cage. We have studied experimentally (by Raman spectroscopy, X-ray absorption and X-ray diffraction) and theoretically (ab initio simulations in the density functional theory formalism) the case of some nanostructured materials made of covalent cages: C60 and silicon clathrates. We show how doping is a way to obtain exotic structures, with new chemical bonds and consequently modify the electronic, structural etc. properties of a material. Besides, the concept of doping itself is discussed, because high doping can lead to new materials with original properties.
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https://tel.archives-ouvertes.fr/tel-00007897
Contributor : Florent Tournus <>
Submitted on : Tuesday, January 4, 2005 - 10:44:34 AM
Last modification on : Thursday, October 15, 2020 - 9:00:03 AM
Long-term archiving on: : Thursday, September 13, 2012 - 2:00:50 PM

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  • HAL Id : tel-00007897, version 1

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Florent Tournus. Étude du dopage de matériaux covalents cages nanostructurés. Physique Atomique [physics.atom-ph]. Université Claude Bernard - Lyon I, 2003. Français. ⟨tel-00007897⟩

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