Rapid synthesis of ordered manganite nanotubes by microwave irradiation in alumina templates.
Highly ordered La2/3Ca1/3MnO3 nanotube arrays were successfully synthesized by a simple and rapid process, combining nanoporous alumina template-assisted synthesis with microwave irradiation. The method offers a quick hands-on route to produce manganite bulk sample and nanotube arrays at relative low-temperatures. We obtain thin wall nanotubes of uniform diameter of 80 nm. The growth mechanism of nanotubes is briefly discussed. Magnetic measurements indicate that the ferromagnetic transition temperature T(c) of the nanotubes is depleted with respect to its bulk counterpart possibly due to the geometric confinement imposed by the thin wall of the nanotubes.
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IFIMUP and IN- Institute of Nanoscience and Nanotechnology, Depto de Física, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal.
Lopes
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Proença
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Leitão
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Correia
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Araújol
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