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Communication Dans Un Congrès Année : 2014

Structural and magnetic study of La0.7Sr0.3MnO3 nanotubes grown from chemical solutions in confined geometries

Résumé

Compared with solid nanowires [1], metal oxide tubular nanostructures have attracted significant research interest because of their large specific surface areas, very narrow inner pores, and enhanced surface catalytic properties. Furthermore, 1D nanotubes (NTs) have showed improved performance in gas sensors, field-emission, photovoltaics, and batteries. However, the development of facile, mild and effective approaches for generating size controllable 1D NTs of complex oxides remains a significant challenge. We demonstrate that self standing La0.7Sr0.3MnO3 (LSMO) NTs with diameters ranging from 80 to 200nm can be successfully synthesized by template assisted chemical solution deposition using nanoporous anodized alumina membranes of varying pore size. The template synthetic strategy provides almost monodisperse size distribution in the fabricated NT dimensions. A sol-gel based polymer precursor route was used allowing a good control of the viscosity and stability of the precursor solution, which are crucial parameters for template aided synthesis. The porous membranes were filled with the precursor solution and subsequently heated at high temperature (700-900°C) for phase formation. We prove that the synthesized LSMO NTs are polycrystalline and ferromagnetic with a Curie temperature above 350K. These 1D nanostructures are good candidates to study the magnetic properties of reduced dimensionality systems. [1] A. Carretero-Genevrier et al. Chem.Soc.Rev. 10.1039/C3CS60288E (2013)
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hal-01489825 , version 1 (14-03-2017)

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  • HAL Id : hal-01489825 , version 1

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Adrien Carretero-Genevrier, C. Frontera, A. Hassini, C. Moreno, T. Puig, et al.. Structural and magnetic study of La0.7Sr0.3MnO3 nanotubes grown from chemical solutions in confined geometries. EMRS, 2014, Lille, France. ⟨hal-01489825⟩
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