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Tubular micro- and nanostructures of TCO materials grown by a vapor-solid method

Miguel García-Tecedor Félix del Prado Carlos Bueno G. Cristian Vásquez Javier Bartolomé David Maestre Tomás Díaz Ana Cremades Javier Piqueras

*Corresponding author: David Maestre dmaestre@ucm.es

Materials2016,2,434doi:10.3934/matersci.2016.2.434

Microtubes and rods with nanopipes of transparent conductive oxides (TCO), such as SnO2, TiO2, ZnO and In2O3, have been fabricated following a vapor-solid method which avoids the use of catalyst or templates. The morphology of the as-grown tubular structures varies as a function of the precursor powder and the parameters employed during the thermal treatments carried out under a controlled argon flow. These materials have been also doped with different elements of technological interest (Cr, Er, Li, Zn, Sn). Energy Dispersive X-ray Spectroscopy (EDS) measurements show that the concentration of the dopants achieved by the vapor-solid method ranges from 0.5 to 3 at.%. Luminescence of the tubes has been analyzed, with special attention paid to the influence of the dopants on their optical properties. In this work, we summarize and discuss some of the processes involved not only in the anisotropic growth of these hollow micro and nanostructures, but also in their doping.

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