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Voids, nanochannels and formation of nanotubes with mobile Sn fillings in Sn doped ZnO nanorods



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Ortega Villafuerte, Yanicet y Dieker, Ch y Jaeger, W. y Piqueras de Noriega, Javier y Fernández Sánchez, Paloma (2010) Voids, nanochannels and formation of nanotubes with mobile Sn fillings in Sn doped ZnO nanorods. Nanotechnology, 21 (22). ISSN 0957-4484

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URL Oficial: http://dx.doi.org/10.1088/0957-4484/21/22/225604

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ZnO nanorods containing different hollow structures have been grown by a thermal evaporation-deposition method with a mixture of ZnS and SnO(2) powders as precursor. Transmission electron microscopy shows rods with rows of voids as well as rods with empty channels along the growth axis. The presence of Sn nanoprecipitates associated with the empty regions indicates, in addition, that these are generated by diffusion processes during growth, probably due to an inhomogeneous distribution of Sn. The mechanism of forming voids and precipitates appears to be based on diffusion processes similar to the Kirkendall effect, which can lead to void formation at interfaces of bulk materials or in core-shell nanostructures. In some cases the nanorods are ZnO tubes partially filled with Sn that has been found to melt and expand by heating the nanotubes under the microscope electron beam. Such metal-semiconductor nanostructures have potential applications as thermal nanosensors or as electrical nanocomponents.

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© 2010 IOP Publishing Ltd.
This work was supported by MEC (Project MAT2006-01259 and MAT2009-07882). Y Ortega thanks the Spanish Ministry of Science and Innovation for financial support through the ‘José Castillejo’ mobility grant program.

Palabras clave:Core-Shell Nanowires, Fabrication
Materias:Ciencias > Física > Física de materiales
Código ID:25670
Depositado:05 Jun 2014 18:01
Última Modificación:08 Jun 2016 16:54

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