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Synthèse et caractérisation de nouvelles nanostructures à base d’oxyde et de carbure de Fe

Abstract : The physical properties of a nanomaterial strongly depend on the size and the shape of the nanostructure. As a consequence, it is interesting to elaborate new materials with different compositions and morphologies. The advanced study on the structure using common characterization techniques (TEM, MEB, XRD, Raman…) allows us to collect all the important information on their physical properties (magnetic, optical and electrical properties). In this thesis, we describe multiple ways to elaborate multifunctional nanostructures with 0D, 1D and 2D in order to study the parameters that control their chemical composition and structure. Besides, this research lead to the elaboration of new nanomaterials based on the oxide and the carbide forms of iron. Magnetic nanofibers with different morphologies (belts, tubes) were prepared using the electrospinning technique while controlling several experimental parameters : solution concentration, pyrolysis atmosphere, thermal treatment temperature… Moreover, thin layers doped with magnetic nanostructures were deposited on a pyrex substrate using the dip-coating technique. A full and detailed study on their structural properties was performed in order to reach the experimental parameters that allow us to obtain high quality products. Finally, we wish to explore the possible applications of these materials that present interesting electrical and magnetic characteristics.
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Cynthia Joseph Eid. Synthèse et caractérisation de nouvelles nanostructures à base d’oxyde et de carbure de Fe. Autre. Université Claude Bernard - Lyon I, 2010. Français. ⟨NNT : 2010LYO10172⟩. ⟨tel-00720870⟩

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