%0 Journal Article
%A Díaz-Guerra Viejo, Carlos
%A Piqueras de Noriega, Javier
%T Structural and cathodoluminescence assessment of V_2O_5 nanowires and nanotips grown by thermal deposition
%D 2007
%@ 0021-8979
%U https://hdl.handle.net/20.500.14352/51094
%X V_2O_5 nanostructures have been grown on 4H-SiC and Si substrates by a thermal deposition method without a catalyst. High aspect ratio nanowires with rectangular cross sections were grown on 4H-SiC. High-resolution transmission electron microscopy observations and cathodoluminescence (CL) spectroscopy measurements reveal the high crystal quality of the grown nanowires. Deposition on Si substrates leads to the growth of V_2O_5 platelets or rod-shaped crystals ending in arrays of parallel sharp nanotips with apex radius in the 50 nm range. A CL emission band observed centered at about 1.70 eV in spectra from these nanostructures is tentatively attributed to defect centers involving oxygen vacancies.
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