Complex hierarchical arrangements of stacked nanoplates in Al-doped ZnO



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Piqueras de Noriega, Javier and Ortega Villafuerte, Yanicet and Fernández Sánchez, Paloma and Jäger, Wolfgang and Häußler , Dietrich (2012) Complex hierarchical arrangements of stacked nanoplates in Al-doped ZnO. Physica Status Solidi A-Applications and Materials Science, 209 (8). pp. 1487-1492. ISSN 1862-6300

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Al-doped micro- and nanostructures have been grown by an evaporation–deposition method with a mixture of ZnS and Al_2O_3 powders as precursor. It has been found that the presence of Al is the cause of the growth of complex morphologies, as rods formed by stacks of nanoplates and other complex hierarchical structures. The role of Al in the growth process has been investigated by electron microscopy techniques. Al-rich particles in specific sites of a central rod lead to hierachical growth. Transmission electron microscopy shows that in some cases the Al-rich zones are clusters of spinel ZnAl_2O_4 nanoparticles adhered to ZnO nanorods. Al incorporation into the structures and the dopant effect on the luminescence behavior of the ZnO structures were investigated by energy dispersive spectroscopy and by cathodoluminescence.

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© 2012 WILEY-VCH Verlag GmbH & Co.
This work was supported by MICINN (MAT2009-07882, CSD2009-00013) and UCM-BSCH (Group 910146). Y. Ortega thanks the Spanish Ministry of Education for financial support through the "José Castillejo" mobility grant program.

Uncontrolled Keywords:Growth, Luminescence, Nanostructures, Nanowires, Arrays
Subjects:Sciences > Physics > Materials
ID Code:23629
Deposited On:21 Nov 2013 10:07
Last Modified:21 Nov 2013 10:07

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