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Étude de nanofils coaxiaux de cœur nickel et gaine Poly (p-phénylène vinylène) pour la manipulation magnétique d'objets luminescents

Abstract : An important part of nanotechnology concerns the elaboration of organic nanomaterials in relation with their numerous applications. Devices with enhanced capabilities can be prepared by combining and assembling novel nanostructured materials which act as building blocks (bottom-up strategy). At the interface between material science and nanophysics, coaxial hybrid metal-polymer nanowires have been developed. These successfully synthesised nanowires own a nickel core and a poly(p-phenylene vinylene) (PPV) shell. Coaxial Poly (methyl methacrylate) (PMMA)/PPV have also been effectively produced. A template-based strategy has been developed which combines a wet-chemical technique and electrodeposition within nanoporous membranes. Morphological, structural and chemical characterization by means of electron microscopy and related techniques demonstrate unambiguously that coaxial nickel/PPV nanowires have been successfully synthesized. Moreover, modification of their optical and magnetic properties due to the nanoscale and the core–shell structure has been studied. The nickel-PPV nanowires exhibit a slightly blueshifted photoluminescence (PL), which is directly related to the tubular morphology of the PPV shell. The effect of the nickel core on the PL intensity of the PPV shell is discussed. The nanowires exhibit a ferromagnetic behaviour with a magnetization easy axis along the wire axis. These magnetic properties as well as the mechanical reinforcement of the polymer nanotube by the metallic core allow the magnetic manipulation of the nanowires. It opens the way to use this kind of system as multifunctional building blocks for bio-applications for example.
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https://tel.archives-ouvertes.fr/tel-00569080
Contributor : Jean-Marc Lorcy <>
Submitted on : Thursday, February 24, 2011 - 11:25:47 AM
Last modification on : Wednesday, July 11, 2018 - 6:06:05 PM
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Jean-Marc Lorcy. Étude de nanofils coaxiaux de cœur nickel et gaine Poly (p-phénylène vinylène) pour la manipulation magnétique d'objets luminescents. Physique [physics]. Université de Nantes, 2009. Français. ⟨tel-00569080⟩

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