Sousa C T, Lopes A M L, Proença M P, Leitão D C, Correia J G, Araújol J P
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.
J Nanosci Nanotechnol. 2009 Oct;9(10):6084-8. doi: 10.1166/jnn.2009.1572.
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.
通过将纳米多孔氧化铝模板辅助合成与微波辐射相结合的简单快速工艺，成功合成了高度有序的La2/3Ca1/3MnO3纳米管阵列。该方法提供了一种在相对低温下制备锰氧化物块状样品和纳米管阵列的快速实用途径。我们获得了直径均匀为80nm的薄壁纳米管。简要讨论了纳米管的生长机制。磁性测量表明，纳米管的铁磁转变温度T(c)相对于其块状对应物有所降低，这可能是由于纳米管薄壁所施加的几何限制。
